Bump to v0.3.1 (#386 )

lsp stuff (#370 )
* initial shit Signed-off-by: Jess Frazelle <github@jessfraz.com> more stuff Signed-off-by: Jess Frazelle <github@jessfraz.com> more stuff Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> add lsp here Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> less than a million restarts but still 3 Signed-off-by: Jess Frazelle <github@jessfraz.com> only start once Signed-off-by: Jess Frazelle <github@jessfraz.com> some better stuff Signed-off-by: Jess Frazelle <github@jessfraz.com> initial working Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> working but jank Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> cleanup Signed-off-by: Jess Frazelle <github@jessfraz.com> cleaner Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> operator types Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> bump version Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> udpates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> hover working Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> diagnosticcs Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> more capabilities Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> fix clippy Signed-off-by: Jess Frazelle <github@jessfraz.com> huge refactor Signed-off-by: Jess Frazelle <github@jessfraz.com> cleanup Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> remove debugging Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> u[dates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> version Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> u[dates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fix ups Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> bump Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> fix Signed-off-by: Jess Frazelle <github@jessfraz.com> fix tests Signed-off-by: Jess Frazelle <github@jessfraz.com> more passing tests Signed-off-by: Jess Frazelle <github@jessfraz.com> more fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> more fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fmt Signed-off-by: Jess Frazelle <github@jessfraz.com> start of parser Signed-off-by: Jess Frazelle <github@jessfraz.com> syntax highlighting is back Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> remove prints Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fix clippy Signed-off-by: Jess Frazelle <github@jessfraz.com> refactor recast Signed-off-by: Jess Frazelle <github@jessfraz.com> fix cljippuy Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> updates; Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> fix whitespace tests Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> Revert "updates" This reverts commit c2c6dceb441ab8d98a590cb27bb462738f7c6df4. fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> bump Signed-off-by: Jess Frazelle <github@jessfraz.com> fixups Signed-off-by: Jess Frazelle <github@jessfraz.com> updaetgs Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> updates Signed-off-by: Jess Frazelle <github@jessfraz.com> remove printlns Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> whitespace Signed-off-by: Jess Frazelle <github@jessfraz.com> udpates Signed-off-by: Jess Frazelle <github@jessfraz.com> fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> up[dates Signed-off-by: Jess Frazelle <github@jessfraz.com> * cleanups Signed-off-by: Jess Frazelle <github@jessfraz.com> * some style changes Signed-off-by: Jess Frazelle <github@jessfraz.com> * updates Signed-off-by: Jess Frazelle <github@jessfraz.com> * remove things Signed-off-by: Jess Frazelle <github@jessfraz.com> * fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> * updates Signed-off-by: Jess Frazelle <github@jessfraz.com> * updares Signed-off-by: Jess Frazelle <github@jessfraz.com> * syntax highlighting fix Signed-off-by: Jess Frazelle <github@jessfraz.com> * fixes Signed-off-by: Jess Frazelle <github@jessfraz.com> * remove console log --------- Signed-off-by: Jess Frazelle <github@jessfraz.com> Co-authored-by: Kurt Hutten <k.hutten@protonmail.ch>
2023-09-05 19:08:11 -04:00 · 2023-09-05 16:02:27 -07:00 · 2023-09-05 17:56:25 -04:00 · 2023-09-05 20:42:26 +10:00 · 2023-09-05 20:40:50 +10:00 · 2023-09-04 11:01:51 -04:00
141 changed files with 41599 additions and 8400 deletions
--- a/.env.development
+++ b/.env.development
@ -1,3 +1,7 @@
 VITE_KC_API_WS_MODELING_URL=wss://api.dev.kittycad.io/ws/modeling/commands
 VITE_KC_API_BASE_URL=https://api.dev.kittycad.io
 VITE_KC_SITE_BASE_URL=https://dev.kittycad.io
+VITE_KC_SKIP_AUTH=false
+VITE_KC_CONNECTION_TIMEOUT_MS=5000
+VITE_KC_CONNECTION_WEBRTC_REPORT_STATS_MS=0
+VITE_KC_SENTRY_DSN=
--- a/.env.production
+++ b/.env.production
@ -1,3 +1,7 @@
 VITE_KC_API_WS_MODELING_URL=wss://api.kittycad.io/ws/modeling/commands
 VITE_KC_API_BASE_URL=https://api.kittycad.io
-VITE_KC_SITE_BASE_URL=https://kittycad.io
+VITE_KC_SITE_BASE_URL=https://kittycad.io
+VITE_KC_SKIP_AUTH=false
+VITE_KC_CONNECTION_TIMEOUT_MS=15000
+VITE_KC_CONNECTION_WEBRTC_REPORT_STATS_MS=30000
+VITE_KC_SENTRY_DSN=https://a814f2f66734989a90367f48feee28ca@o1042111.ingest.sentry.io/4505789425844224
--- a/.eslintignore
+++ b/.eslintignore
@ -0,0 +1 @@
+src/wasm-lib/*
--- a/.github/workflows/cargo-build.yml
+++ b/.github/workflows/cargo-build.yml
@ -22,7 +22,7 @@ jobs:
    runs-on: ubuntu-latest
    strategy:
      matrix:
-        dir: ['src/wasm-lib', 'src-tauri']
+        dir: ['src/wasm-lib']
    steps:
      - uses: actions/checkout@v3

--- a/.github/workflows/cargo-clippy.yml
+++ b/.github/workflows/cargo-clippy.yml
@ -22,7 +22,7 @@ jobs:
    runs-on: ubuntu-latest
    strategy:
      matrix:
-        dir: ['src/wasm-lib', 'src-tauri']
+        dir: ['src/wasm-lib']
    steps:
      - uses: actions/checkout@v3
      - name: Install latest rust
--- a/.github/workflows/cargo-test.yml
+++ b/.github/workflows/cargo-test.yml
@ -24,7 +24,7 @@ jobs:
    runs-on: ubuntu-latest-8-cores
    strategy:
      matrix:
-        dir: ['src/wasm-lib', 'src-tauri']
+        dir: ['src/wasm-lib']
    steps:
      - uses: actions/checkout@v3
      - name: Install latest rust
@ -45,4 +45,7 @@ jobs:
        shell: bash
        run: |-
          cd "${{ matrix.dir }}"
-          cargo llvm-cov nextest --lcov --output-path lcov.info --test-threads=1 --no-fail-fast
+          cargo test --all
+        env:
+          KITTYCAD_API_TOKEN: ${{secrets.KITTYCAD_API_TOKEN}}
+
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -142,11 +142,11 @@ jobs:
          jq --null-input \
            --arg version "v${VERSION_NO_V}" \
            --arg darwin_sig "$DARWIN_SIG" \
-            --arg darwin_url "$RELEASE_DIR/macos/kittycad-modeling-app.app.tar.gz" \
+            --arg darwin_url "$RELEASE_DIR/macos/KittyCAD%20Modeling.app.tar.gz" \
            --arg linux_sig "$LINUX_SIG" \
-            --arg linux_url "$RELEASE_DIR/appimage/kittycad-modeling-app_${VERSION_NO_V}_amd64.AppImage.tar.gz" \
+            --arg linux_url "$RELEASE_DIR/appimage/kittycad-modeling_${VERSION_NO_V}_amd64.AppImage.tar.gz" \
            --arg windows_sig "$WINDOWS_SIG" \
-            --arg windows_url "$RELEASE_DIR/nsis/kittycad-modeling-app_${VERSION_NO_V}_x64-setup.nsis.zip" \
+            --arg windows_url "$RELEASE_DIR/nsis/KittyCAD%20Modeling_${VERSION_NO_V}_x64-setup.nsis.zip" \
            '{
              "version": $version,
              "platforms": {
@ -180,7 +180,7 @@ jobs:
        uses: google-github-actions/upload-cloud-storage@v1.0.3
        with:
          path: artifact
-          glob: '*/kittycad-modeling-app*'
+          glob: '*/*'
          parent: false
          destination: dl.kittycad.io/releases/modeling-app/v${{ env.VERSION_NO_V }} 
      
@ -189,3 +189,8 @@ jobs:
        with:
          path: last_update.json
          destination: dl.kittycad.io/releases/modeling-app
+
+      - name: Upload release files to Github
+        uses: softprops/action-gh-release@v1
+        with:
+          files: artifact/*/*
--- a/.gitignore
+++ b/.gitignore
@ -25,5 +25,6 @@ yarn-error.log*
 # rust
 src/wasm-lib/target
 src/wasm-lib/bindings
+src/wasm-lib/kcl/bindings
 public/wasm_lib_bg.wasm
 src/wasm-lib/lcov.info
--- a/docs/kcl.json
+++ b/docs/kcl.json
--- a/docs/kcl.md
+++ b/docs/kcl.md
--- a/index.html
+++ b/index.html
@ -11,6 +11,7 @@
    />
    <link rel="apple-touch-icon" href="/logo192.png" />
    <link rel="manifest" href="/manifest.json" />
+    <script defer data-domain="app.kittycad.io" src="https://plausible.corp.kittycad.io/js/script.js"></script>
    <title>KittyCAD Modeling App</title>
  </head>
  <body class="body-bg">
--- a/package.json
+++ b/package.json
@ -1,28 +1,35 @@
 {
  "name": "untitled-app",
-  "version": "0.0.4",
+  "version": "0.3.1",
  "private": true,
  "dependencies": {
+    "@codemirror/autocomplete": "^6.9.0",
    "@fortawesome/fontawesome-svg-core": "^6.4.2",
    "@fortawesome/free-brands-svg-icons": "^6.4.2",
    "@fortawesome/free-solid-svg-icons": "^6.4.2",
    "@fortawesome/react-fontawesome": "^0.2.0",
    "@headlessui/react": "^1.7.13",
-    "@kittycad/lib": "^0.0.29",
+    "@headlessui/tailwindcss": "^0.2.0",
+    "@kittycad/lib": "^0.0.35",
+    "@lezer/javascript": "^1.4.7",
+    "@open-rpc/client-js": "^1.8.1",
    "@react-hook/resize-observer": "^1.2.6",
+    "@sentry/react": "^7.65.0",
    "@tauri-apps/api": "^1.3.0",
    "@testing-library/jest-dom": "^5.14.1",
    "@testing-library/react": "^13.0.0",
    "@testing-library/user-event": "^13.2.1",
+    "@ts-stack/markdown": "^1.5.0",
    "@types/node": "^16.7.13",
    "@types/react": "^18.0.0",
    "@types/react-dom": "^18.0.0",
-    "@uiw/codemirror-extensions-langs": "^4.21.9",
-    "@uiw/react-codemirror": "^4.15.1",
+    "@uiw/react-codemirror": "^4.21.13",
    "@xstate/react": "^3.2.2",
    "crypto-js": "^4.1.1",
    "formik": "^2.4.3",
+    "fuse.js": "^6.6.2",
    "http-server": "^14.1.1",
+    "json-rpc-2.0": "^1.6.0",
    "re-resizable": "^6.9.9",
    "react": "^18.2.0",
    "react-dom": "^18.2.0",
@ -40,6 +47,8 @@
    "typescript": "^4.4.2",
    "uuid": "^9.0.0",
    "vitest": "^0.34.1",
+    "vscode-jsonrpc": "^8.1.0",
+    "vscode-languageserver-protocol": "^3.17.3",
    "wasm-pack": "^0.12.1",
    "web-vitals": "^2.1.0",
    "ws": "^8.13.0",
@ -54,15 +63,15 @@
    "build:both:local": "yarn build:wasm && vite build",
    "test": "vitest --mode development",
    "test:nowatch": "vitest run --mode development",
-    "test:rust": "(cd src/wasm-lib && cargo test && cargo clippy)",
+    "test:rust": "(cd src/wasm-lib && cargo test --all && cargo clippy --all --tests)",
    "test:cov": "vitest run --coverage --mode development",
    "simpleserver:ci": "http-server ./public --cors -p 3000 &",
    "simpleserver": "http-server ./public --cors -p 3000",
    "fmt": "prettier --write ./src",
    "fmt-check": "prettier --check ./src",
-    "build:wasm": "yarn wasm-prep && (cd src/wasm-lib && wasm-pack build --target web --out-dir pkg && cargo test --all) && cp src/wasm-lib/pkg/wasm_lib_bg.wasm public && yarn fmt && yarn remove-importmeta",
+    "build:wasm": "yarn wasm-prep && (cd src/wasm-lib && wasm-pack build --target web --out-dir pkg && cargo test -p kcl-lib export_bindings) && cp src/wasm-lib/pkg/wasm_lib_bg.wasm public && yarn fmt && yarn remove-importmeta",
    "remove-importmeta": "sed -i 's/import.meta.url//g' \"./src/wasm-lib/pkg/wasm_lib.js\"; sed -i '' 's/import.meta.url//g' \"./src/wasm-lib/pkg/wasm_lib.js\" || echo \"sed for both mac and linux\"",
-    "wasm-prep": "rm -rf src/wasm-lib/pkg && mkdir src/wasm-lib/pkg && rm -rf src/wasm-lib/bindings",
+    "wasm-prep": "rm -rf src/wasm-lib/pkg && mkdir src/wasm-lib/pkg && rm -rf src/wasm-lib/kcl/bindings",
    "lint": "eslint --fix src",
    "bump-jsons": "echo \"$(jq --arg v \"$VERSION\" '.version=$v' package.json --indent 2)\" > package.json && echo \"$(jq --arg v \"$VERSION\" '.package.version=$v' src-tauri/tauri.conf.json --indent 2)\" > src-tauri/tauri.conf.json"
  },
@ -89,6 +98,7 @@
    "@babel/preset-env": "^7.22.9",
    "@tauri-apps/cli": "^1.3.1",
    "@types/crypto-js": "^4.1.1",
+    "@types/debounce": "^1.2.1",
    "@types/isomorphic-fetch": "^0.0.36",
    "@types/react-modal": "^3.16.0",
    "@types/uuid": "^9.0.1",
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@ -648,6 +648,12 @@ dependencies = [
 "cfg-if",
 ]

+[[package]]
+name = "equivalent"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
+
 [[package]]
 name = "errno"
 version = "0.3.1"
@ -1150,7 +1156,7 @@ dependencies = [
 "futures-sink",
 "futures-util",
 "http",
- "indexmap",
+ "indexmap 1.9.3",
 "slab",
 "tokio",
 "tokio-util",
@ -1163,6 +1169,12 @@ version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"

+[[package]]
+name = "hashbrown"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c6201b9ff9fd90a5a3bac2e56a830d0caa509576f0e503818ee82c181b3437a"
+
 [[package]]
 name = "heck"
 version = "0.3.3"
@ -1378,7 +1390,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
 dependencies = [
 "autocfg",
- "hashbrown",
+ "hashbrown 0.12.3",
+ "serde",
+]
+
+[[package]]
+name = "indexmap"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5477fe2230a79769d8dc68e0eabf5437907c0457a5614a9e8dddb67f65eb65d"
+dependencies = [
+ "equivalent",
+ "hashbrown 0.14.0",
 "serde",
 ]

@ -1628,6 +1651,12 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"

+[[package]]
+name = "minisign-verify"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "933dca44d65cdd53b355d0b73d380a2ff5da71f87f036053188bf1eab6a19881"
+
 [[package]]
 name = "miniz_oxide"
 version = "0.6.2"
@ -2122,7 +2151,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9bd9647b268a3d3e14ff09c23201133a62589c658db02bb7388c7246aafe0590"
 dependencies = [
 "base64 0.21.2",
- "indexmap",
+ "indexmap 1.9.3",
 "line-wrap",
 "quick-xml",
 "serde",
@ -2695,14 +2724,15 @@ dependencies = [

 [[package]]
 name = "serde_with"
-version = "2.3.3"
+version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07ff71d2c147a7b57362cead5e22f772cd52f6ab31cfcd9edcd7f6aeb2a0afbe"
+checksum = "1402f54f9a3b9e2efe71c1cea24e648acce55887983553eeb858cf3115acfd49"
 dependencies = [
- "base64 0.13.1",
+ "base64 0.21.2",
 "chrono",
 "hex",
- "indexmap",
+ "indexmap 1.9.3",
+ "indexmap 2.0.0",
 "serde",
 "serde_json",
 "serde_with_macros",
@ -2711,9 +2741,9 @@ dependencies = [

 [[package]]
 name = "serde_with_macros"
-version = "2.3.3"
+version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "881b6f881b17d13214e5d494c939ebab463d01264ce1811e9d4ac3a882e7695f"
+checksum = "9197f1ad0e3c173a0222d3c4404fb04c3afe87e962bcb327af73e8301fa203c7"
 dependencies = [
 "darling",
 "proc-macro2",
@ -3022,6 +3052,7 @@ checksum = "d42ba3a2e8556722f31336a0750c10dbb6a81396a1c452977f515da83f69f842"
 dependencies = [
 "anyhow",
 "attohttpc",
+ "base64 0.21.2",
 "cocoa",
 "dirs-next",
 "embed_plist",
@ -3034,6 +3065,7 @@ dependencies = [
 "heck 0.4.1",
 "http",
 "ignore",
+ "minisign-verify",
 "objc",
 "once_cell",
 "open",
@ -3055,19 +3087,21 @@ dependencies = [
 "tauri-utils",
 "tempfile",
 "thiserror",
+ "time",
 "tokio",
 "url",
 "uuid",
 "webkit2gtk",
 "webview2-com",
 "windows 0.39.0",
+ "zip",
 ]

 [[package]]
 name = "tauri-build"
-version = "1.3.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "929b3bd1248afc07b63e33a6a53c3f82c32d0b0a5e216e4530e94c467e019389"
+checksum = "7d2edd6a259b5591c8efdeb9d5702cb53515b82a6affebd55c7fd6d3a27b7d1b"
 dependencies = [
 "anyhow",
 "cargo_toml",
@ -3078,7 +3112,6 @@ dependencies = [
 "serde_json",
 "tauri-utils",
 "tauri-winres",
- "winnow",
 ]

 [[package]]
@ -3176,12 +3209,13 @@ dependencies = [

 [[package]]
 name = "tauri-utils"
-version = "1.3.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a6f9c2dafef5cbcf52926af57ce9561bd33bb41d7394f8bb849c0330260d864"
+checksum = "03fc02bb6072bb397e1d473c6f76c953cda48b4a2d0cce605df284aa74a12e84"
 dependencies = [
 "brotli",
 "ctor",
+ "dunce",
 "glob",
 "heck 0.4.1",
 "html5ever",
@ -3397,7 +3431,7 @@ version = "0.18.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "56c59d8dd7d0dcbc6428bf7aa2f0e823e26e43b3c9aca15bbc9475d23e5fa12b"
 dependencies = [
- "indexmap",
+ "indexmap 1.9.3",
 "nom8",
 "serde",
 "serde_spanned",
@ -3410,7 +3444,7 @@ version = "0.19.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "239410c8609e8125456927e6707163a3b1fdb40561e4b803bc041f466ccfdc13"
 dependencies = [
- "indexmap",
+ "indexmap 1.9.3",
 "serde",
 "serde_spanned",
 "toml_datetime 0.6.2",
@ -4228,3 +4262,14 @@ checksum = "6d1526bbe5aaeb5eb06885f4d987bcdfa5e23187055de9b83fe00156a821fabc"
 dependencies = [
 "libc",
 ]
+
+[[package]]
+name = "zip"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "760394e246e4c28189f19d488c058bf16f564016aefac5d32bb1f3b51d5e9261"
+dependencies = [
+ "byteorder",
+ "crc32fast",
+ "crossbeam-utils",
+]
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@ -12,14 +12,14 @@ rust-version = "1.60"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

 [build-dependencies]
-tauri-build = { version = "1.3.0", features = [] }
+tauri-build = { version = "1.4.0", features = [] }

 [dependencies]
 anyhow = "1"
 oauth2 = "4.4.1"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-tauri = { version = "1.3.0", features = [ "path-all", "dialog-all", "fs-all", "http-request", "shell-open", "shell-open-api"] }
+tauri = { version = "1.3.0", features = [ "updater", "path-all", "dialog-all", "fs-all", "http-request", "shell-open", "shell-open-api"] }
 tokio = { version = "1.29.1", features = ["time"] }
 toml = "0.6.0"
 tauri-plugin-fs-extra = { git = "https://github.com/tauri-apps/plugins-workspace", branch = "v1" }
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@ -7,8 +7,8 @@
    "distDir": "../build"
  },
  "package": {
-    "productName": "kittycad-modeling-app",
-    "version": "0.0.4"
+    "productName": "kittycad-modeling",
+    "version": "0.3.1"
  },
  "tauri": {
    "allowlist": {
--- a/src-tauri/tauri.macos.conf.json
+++ b/src-tauri/tauri.macos.conf.json
@ -0,0 +1,7 @@
+
+{
+  "$schema": "../node_modules/@tauri-apps/cli/schema.json",
+  "package": {
+    "productName": "KittyCAD Modeling"
+  }
+}
--- a/src-tauri/tauri.windows.conf.json
+++ b/src-tauri/tauri.windows.conf.json
@ -0,0 +1,7 @@
+
+{
+  "$schema": "../node_modules/@tauri-apps/cli/schema.json",
+  "package": {
+    "productName": "KittyCAD Modeling"
+  }
+}
--- a/src/App.test.tsx
+++ b/src/App.test.tsx
@ -2,7 +2,8 @@ import { render, screen } from '@testing-library/react'
 import { App } from './App'
 import { describe, test, vi } from 'vitest'
 import { BrowserRouter } from 'react-router-dom'
-import { GlobalStateProvider } from './hooks/useAuthMachine'
+import { GlobalStateProvider } from './components/GlobalStateProvider'
+import CommandBarProvider from 'components/CommandBar'

 let listener: ((rect: any) => void) | undefined = undefined
 ;(global as any).ResizeObserver = class ResizeObserver {
@ -43,7 +44,9 @@ function TestWrap({ children }: { children: React.ReactNode }) {
  // wrap in router and xState context
  return (
    <BrowserRouter>
-      <GlobalStateProvider>{children}</GlobalStateProvider>
+      <CommandBarProvider>
+        <GlobalStateProvider>{children}</GlobalStateProvider>
+      </CommandBarProvider>
    </BrowserRouter>
  )
 }
--- a/src/App.tsx
+++ b/src/App.tsx
@ -11,20 +11,22 @@ import { v4 as uuidv4 } from 'uuid'
 import { asyncParser } from './lang/abstractSyntaxTree'
 import { _executor } from './lang/executor'
 import CodeMirror from '@uiw/react-codemirror'
-import { langs } from '@uiw/codemirror-extensions-langs'
 import { linter, lintGutter } from '@codemirror/lint'
-import { ViewUpdate } from '@codemirror/view'
+import { ViewUpdate, EditorView } from '@codemirror/view'
 import {
  lineHighlightField,
  addLineHighlight,
 } from './editor/highlightextension'
-import { PaneType, Selections, Themes, useStore } from './useStore'
+import { PaneType, Selections, useStore } from './useStore'
+import Server from './editor/lsp/server'
+import Client from './editor/lsp/client'
 import { Logs, KCLErrors } from './components/Logs'
 import { CollapsiblePanel } from './components/CollapsiblePanel'
 import { MemoryPanel } from './components/MemoryPanel'
 import { useHotKeyListener } from './hooks/useHotKeyListener'
 import { Stream } from './components/Stream'
 import ModalContainer from 'react-modal-promise'
+import { FromServer, IntoServer } from './editor/lsp/codec'
 import {
  EngineCommand,
  EngineCommandManager,
@ -41,14 +43,17 @@ import {
 import { useHotkeys } from 'react-hotkeys-hook'
 import { TEST } from './env'
 import { getNormalisedCoordinates } from './lib/utils'
-import { getSystemTheme } from './lib/getSystemTheme'
+import { Themes, getSystemTheme } from './lib/theme'
 import { isTauri } from './lib/isTauri'
 import { useLoaderData, useParams } from 'react-router-dom'
 import { writeTextFile } from '@tauri-apps/api/fs'
 import { PROJECT_ENTRYPOINT } from './lib/tauriFS'
 import { IndexLoaderData } from './Router'
 import { toast } from 'react-hot-toast'
-import { useAuthMachine } from './hooks/useAuthMachine'
+import { useGlobalStateContext } from 'hooks/useGlobalStateContext'
+import { onboardingPaths } from 'routes/Onboarding'
+import { LanguageServerClient } from 'editor/lsp'
+import kclLanguage from 'editor/lsp/language'

 export function App() {
  const { code: loadedCode, project } = useLoaderData() as IndexLoaderData
@ -79,15 +84,12 @@ export function App() {
    setMediaStream,
    setIsStreamReady,
    isStreamReady,
+    isLSPServerReady,
+    setIsLSPServerReady,
    isMouseDownInStream,
-    cmdId,
-    setCmdId,
    formatCode,
-    debugPanel,
-    theme,
    openPanes,
    setOpenPanes,
-    onboardingStatus,
    didDragInStream,
    setDidDragInStream,
    setStreamDimensions,
@ -118,22 +120,27 @@ export function App() {
    setMediaStream: s.setMediaStream,
    isStreamReady: s.isStreamReady,
    setIsStreamReady: s.setIsStreamReady,
+    isLSPServerReady: s.isLSPServerReady,
+    setIsLSPServerReady: s.setIsLSPServerReady,
    isMouseDownInStream: s.isMouseDownInStream,
-    cmdId: s.cmdId,
-    setCmdId: s.setCmdId,
    formatCode: s.formatCode,
-    debugPanel: s.debugPanel,
    addKCLError: s.addKCLError,
-    theme: s.theme,
    openPanes: s.openPanes,
    setOpenPanes: s.setOpenPanes,
-    onboardingStatus: s.onboardingStatus,
    didDragInStream: s.didDragInStream,
    setDidDragInStream: s.setDidDragInStream,
    setStreamDimensions: s.setStreamDimensions,
    streamDimensions: s.streamDimensions,
  }))
-  const [token] = useAuthMachine((s) => s?.context?.token)
+
+  const {
+    auth: {
+      context: { token },
+    },
+    settings: {
+      context: { showDebugPanel, theme, onboardingStatus },
+    },
+  } = useGlobalStateContext()

  const editorTheme = theme === Themes.System ? getSystemTheme() : theme

@ -152,7 +159,7 @@ export function App() {
  useHotkeys('shift + d', () => togglePane('debug'))

  const paneOpacity =
-    onboardingStatus === 'camera'
+    onboardingStatus === onboardingPaths.CAMERA
      ? 'opacity-20'
      : didDragInStream
      ? 'opacity-40'
@ -246,13 +253,12 @@ export function App() {
      codeBasedSelections,
    })
  }
-  const pixelDensity = window.devicePixelRatio
  const streamWidth = streamRef?.current?.offsetWidth
  const streamHeight = streamRef?.current?.offsetHeight

-  const width = streamWidth ? streamWidth * pixelDensity : 0
+  const width = streamWidth ? streamWidth : 0
  const quadWidth = Math.round(width / 4) * 4
-  const height = streamHeight ? streamHeight * pixelDensity : 0
+  const height = streamHeight ? streamHeight : 0
  const quadHeight = Math.round(height / 4) * 4

  useLayoutEffect(() => {
@ -276,6 +282,8 @@ export function App() {

  useEffect(() => {
    if (!isStreamReady) return
+    if (!engineCommandManager) return
+    let unsubFn: any[] = []
    const asyncWrap = async () => {
      try {
        if (!code) {
@ -286,27 +294,12 @@ export function App() {
        setAst(_ast)
        resetLogs()
        resetKCLErrors()
-        if (engineCommandManager) {
-          engineCommandManager.endSession()
-          engineCommandManager.startNewSession()
-        }
-        if (!engineCommandManager) return
+        engineCommandManager.endSession()
+        engineCommandManager.startNewSession()
        const programMemory = await _executor(
          _ast,
          {
            root: {
-              log: {
-                type: 'userVal',
-                value: (a: any) => {
-                  addLog(a)
-                },
-                __meta: [
-                  {
-                    pathToNode: [],
-                    sourceRange: [0, 0],
-                  },
-                ],
-              },
              _0: {
                type: 'userVal',
                value: 0,
@ -328,33 +321,37 @@ export function App() {
                __meta: [],
              },
            },
-            pendingMemory: {},
          },
-          engineCommandManager,
-          { bodyType: 'root' },
-          []
+          engineCommandManager
        )

        const { artifactMap, sourceRangeMap } =
          await engineCommandManager.waitForAllCommands()

        setArtifactMap({ artifactMap, sourceRangeMap })
-        engineCommandManager.onHover((id) => {
-          if (!id) {
-            setHighlightRange([0, 0])
-          } else {
-            const sourceRange = sourceRangeMap[id]
-            setHighlightRange(sourceRange)
-          }
+        const unSubHover = engineCommandManager.subscribeToUnreliable({
+          event: 'highlight_set_entity',
+          callback: ({ data }) => {
+            if (!data?.entity_id) {
+              setHighlightRange([0, 0])
+            } else {
+              const sourceRange = sourceRangeMap[data.entity_id]
+              setHighlightRange(sourceRange)
+            }
+          },
        })
-        engineCommandManager.onClick((selections) => {
-          if (!selections) {
-            setCursor2()
-            return
-          }
-          const { id, type } = selections
-          setCursor2({ range: sourceRangeMap[id], type })
+        const unSubClick = engineCommandManager.subscribeTo({
+          event: 'select_with_point',
+          callback: ({ data }) => {
+            if (!data?.entity_id) {
+              setCursor2()
+              return
+            }
+            const sourceRange = sourceRangeMap[data.entity_id]
+            setCursor2({ range: sourceRange, type: 'default' })
+          },
        })
+        unsubFn.push(unSubHover, unSubClick)
        if (programMemory !== undefined) {
          setProgramMemory(programMemory)
        }
@ -371,7 +368,10 @@ export function App() {
      }
    }
    asyncWrap()
-  }, [code, isStreamReady])
+    return () => {
+      unsubFn.forEach((fn) => fn())
+    }
+  }, [code, isStreamReady, engineCommandManager])

  const debounceSocketSend = throttle<EngineCommand>((message) => {
    engineCommandManager?.sendSceneCommand(message)
@ -399,9 +399,8 @@ export function App() {
    const interaction = ctrlKey ? 'zoom' : shiftKey ? 'pan' : 'rotate'

    const newCmdId = uuidv4()
-    setCmdId(newCmdId)

-    if (cmdId && isMouseDownInStream) {
+    if (isMouseDownInStream) {
      debounceSocketSend({
        type: 'modeling_cmd_req',
        cmd: {
@ -430,9 +429,49 @@ export function App() {
      linter((_view) => {
        return kclErrToDiagnostic(useStore.getState().kclErrors)
      }),
+      EditorView.lineWrapping,
    ]
  }, [])

+  // So this is a bit weird, we need to initialize the lsp server and client.
+  // But the server happens async so we break this into two parts.
+  // Below is the client and server promise.
+  const { lspClient } = useMemo(() => {
+    const intoServer: IntoServer = new IntoServer()
+    const fromServer: FromServer = FromServer.create()
+    const client = new Client(fromServer, intoServer)
+    if (!TEST) {
+      Server.initialize(intoServer, fromServer).then((lspServer) => {
+        lspServer.start()
+        setIsLSPServerReady(true)
+      })
+    }
+
+    const lspClient = new LanguageServerClient({ client })
+    return { lspClient }
+  }, [setIsLSPServerReady])
+
+  // Here we initialize the plugin which will start the client.
+  // When we have multi-file support the name of the file will be a dep of
+  // this use memo, as well as the directory structure, which I think is
+  // a good setup becuase it will restart the client but not the server :)
+  // We do not want to restart the server, its just wasteful.
+  const kclLSP = useMemo(() => {
+    let plugin = null
+    if (isLSPServerReady && !TEST) {
+      // Set up the lsp plugin.
+      const lsp = kclLanguage({
+        // When we have more than one file, we'll need to change this.
+        documentUri: `file:///we-just-have-one-file-for-now.kcl`,
+        workspaceFolders: null,
+        client: lspClient,
+      })
+
+      plugin = lsp
+    }
+    return plugin
+  }, [lspClient, isLSPServerReady])
+
  return (
    <div
      className="h-screen overflow-hidden relative flex flex-col cursor-pointer select-none"
@ -474,7 +513,7 @@ export function App() {
          <CollapsiblePanel
            title="Code"
            icon={faCode}
-            className="open:!mb-2"
+            className="open:!mb-2 overflow-x-hidden"
            open={openPanes.includes('code')}
          >
            <div className="px-2 py-1">
@ -486,15 +525,18 @@ export function App() {
                format
              </button>
            </div>
-            <div id="code-mirror-override">
+            <div
+              id="code-mirror-override"
+              className="overflow-x-hidden  h-full"
+            >
              <CodeMirror
-                className="h-full"
+                className="h-full overflow-hidden-x"
                value={code}
-                extensions={[
-                  langs.javascript({ jsx: true }),
-                  lineHighlightField,
-                  ...extraExtensions,
-                ]}
+                extensions={
+                  kclLSP
+                    ? [kclLSP, lineHighlightField, ...extraExtensions]
+                    : [lineHighlightField, ...extraExtensions]
+                }
                onChange={onChange}
                onUpdate={onUpdate}
                theme={editorTheme}
@ -525,7 +567,7 @@ export function App() {
        </div>
      </Resizable>
      <Stream className="absolute inset-0 z-0" />
-      {debugPanel && (
+      {showDebugPanel && (
        <DebugPanel
          title="Debug"
          className={
--- a/src/Auth.tsx
+++ b/src/Auth.tsx
@ -1,9 +1,12 @@
 import Loading from './components/Loading'
-import { useAuthMachine } from './hooks/useAuthMachine'
+import { useGlobalStateContext } from 'hooks/useGlobalStateContext'

 // Wrapper around protected routes, used in src/Router.tsx
 export const Auth = ({ children }: React.PropsWithChildren) => {
-  const [isLoggedIn] = useAuthMachine((s) => s.matches('checkIfLoggedIn'))
+  const {
+    auth: { state },
+  } = useGlobalStateContext()
+  const isLoggedIn = state.matches('checkIfLoggedIn')

  return isLoggedIn ? (
    <Loading>Loading KittyCAD Modeling App...</Loading>
--- a/src/Router.tsx
+++ b/src/Router.tsx
@ -3,8 +3,15 @@ import {
  createBrowserRouter,
  Outlet,
  redirect,
+  useLocation,
  RouterProvider,
 } from 'react-router-dom'
+import {
+  matchRoutes,
+  createRoutesFromChildren,
+  useNavigationType,
+} from 'react-router'
+import { useEffect } from 'react'
 import { ErrorPage } from './components/ErrorPage'
 import { Settings } from './routes/Settings'
 import Onboarding, {
@ -24,7 +31,47 @@ import {
 } from './lib/tauriFS'
 import { metadata, type Metadata } from 'tauri-plugin-fs-extra-api'
 import DownloadAppBanner from './components/DownloadAppBanner'
-import { GlobalStateProvider } from './hooks/useAuthMachine'
+import { GlobalStateProvider } from './components/GlobalStateProvider'
+import {
+  SETTINGS_PERSIST_KEY,
+  settingsMachine,
+} from './machines/settingsMachine'
+import { ContextFrom } from 'xstate'
+import CommandBarProvider from 'components/CommandBar'
+import { TEST, VITE_KC_SENTRY_DSN } from './env'
+import * as Sentry from '@sentry/react'
+
+if (VITE_KC_SENTRY_DSN && !TEST) {
+  Sentry.init({
+    dsn: VITE_KC_SENTRY_DSN,
+    // TODO(paultag): pass in the right env here.
+    // environment: "production",
+    integrations: [
+      new Sentry.BrowserTracing({
+        routingInstrumentation: Sentry.reactRouterV6Instrumentation(
+          useEffect,
+          useLocation,
+          useNavigationType,
+          createRoutesFromChildren,
+          matchRoutes
+        ),
+      }),
+      new Sentry.Replay(),
+    ],
+
+    // Set tracesSampleRate to 1.0 to capture 100%
+    // of transactions for performance monitoring.
+    tracesSampleRate: 1.0,
+
+    // TODO: Add in kittycad.io endpoints
+    tracePropagationTargets: ['localhost'],
+
+    // Capture Replay for 10% of all sessions,
+    // plus for 100% of sessions with an error
+    replaysSessionSampleRate: 0.1,
+    replaysOnErrorSampleRate: 1.0,
+  })
+}

 const prependRoutes =
  (routesObject: Record<string, string>) => (prepend: string) => {
@ -68,7 +115,11 @@ const addGlobalContextToElements = (
    'element' in route
      ? {
          ...route,
-          element: <GlobalStateProvider>{route.element}</GlobalStateProvider>,
+          element: (
+            <CommandBarProvider>
+              <GlobalStateProvider>{route.element}</GlobalStateProvider>
+            </CommandBarProvider>
+          ),
        }
      : route
  )
@ -95,26 +146,25 @@ const router = createBrowserRouter(
        request,
        params,
      }): Promise<IndexLoaderData | Response> => {
-        const store = localStorage.getItem('store')
-        if (store === null) {
-          return redirect(paths.ONBOARDING.INDEX)
-        } else {
-          const status = JSON.parse(store).state.onboardingStatus || ''
-          const notEnRouteToOnboarding =
-            !request.url.includes(paths.ONBOARDING.INDEX) &&
-            request.method === 'GET'
-          // '' is the initial state, 'done' and 'dismissed' are the final states
-          const hasValidOnboardingStatus =
-            (status !== undefined && status.length === 0) ||
-            !(status === 'done' || status === 'dismissed')
-          const shouldRedirectToOnboarding =
-            notEnRouteToOnboarding && hasValidOnboardingStatus
+        const fetchedStorage = localStorage?.getItem(SETTINGS_PERSIST_KEY)
+        const persistedSettings = JSON.parse(fetchedStorage || '{}') as Partial<
+          ContextFrom<typeof settingsMachine>
+        >

-          if (shouldRedirectToOnboarding) {
-            return redirect(
-              makeUrlPathRelative(paths.ONBOARDING.INDEX) + status
-            )
-          }
+        const status = persistedSettings.onboardingStatus || ''
+        const notEnRouteToOnboarding = !request.url.includes(
+          paths.ONBOARDING.INDEX
+        )
+        // '' is the initial state, 'done' and 'dismissed' are the final states
+        const hasValidOnboardingStatus =
+          status.length === 0 || !(status === 'done' || status === 'dismissed')
+        const shouldRedirectToOnboarding =
+          notEnRouteToOnboarding && hasValidOnboardingStatus
+
+        if (shouldRedirectToOnboarding) {
+          return redirect(
+            makeUrlPathRelative(paths.ONBOARDING.INDEX) + status.slice(1)
+          )
        }

        if (params.id && params.id !== 'new') {
@ -164,9 +214,23 @@ const router = createBrowserRouter(
        if (!isTauri()) {
          return redirect(paths.FILE + '/new')
        }
-
-        const projectDir = await initializeProjectDirectory()
-        const projectsNoMeta = (await readDir(projectDir.dir)).filter(
+        const fetchedStorage = localStorage?.getItem(SETTINGS_PERSIST_KEY)
+        const persistedSettings = JSON.parse(fetchedStorage || '{}') as Partial<
+          ContextFrom<typeof settingsMachine>
+        >
+        const projectDir = await initializeProjectDirectory(
+          persistedSettings.defaultDirectory || ''
+        )
+        if (projectDir !== persistedSettings.defaultDirectory) {
+          localStorage.setItem(
+            SETTINGS_PERSIST_KEY,
+            JSON.stringify({
+              ...persistedSettings,
+              defaultDirectory: projectDir,
+            })
+          )
+        }
+        const projectsNoMeta = (await readDir(projectDir)).filter(
          isProjectDirectory
        )
        const projects = await Promise.all(
--- a/src/Toolbar.module.css
+++ b/src/Toolbar.module.css
@ -0,0 +1,60 @@
+.toolbarWrapper {
+  @apply relative;
+}
+
+.toolbar {
+  @apply flex gap-4 items-center rounded-full;
+  @apply border border-cool-20/30 bg-cool-10/50;
+}
+
+:global(.dark) .toolbar {
+  @apply border-cool-100/50 bg-cool-120/50;
+}
+
+:global(.sketch) .toolbar {
+  @apply border-fern-20/20 bg-fern-10/20;
+}
+
+:global(.dark .sketch) .toolbar {
+  @apply border-fern-120/50 bg-fern-100/30;
+}
+
+.toolbarCap {
+  @apply text-sm font-bold;
+  @apply bg-cool-20/50 text-cool-100;
+}
+
+:global(.dark) .toolbarCap {
+  @apply bg-cool-90/50 text-cool-30;
+}
+
+:global(.sketch) .toolbarCap {
+  @apply bg-fern-20/50 text-fern-100;
+}
+
+:global(.dark .sketch) .toolbarCap {
+  @apply bg-fern-90/50 text-fern-30;
+}
+
+.label {
+  @apply self-stretch flex items-center px-4 py-1;
+  @apply rounded-l-full;
+}
+
+.popoverToggle {
+  @apply self-stretch m-0 flex items-center px-4 py-1;
+  @apply rounded-r-full border-none;
+  @apply hover:bg-cool-20;
+}
+
+:global(.dark) .popoverToggle {
+  @apply hover:bg-cool-90;
+}
+
+:global(.sketch) .popoverToggle {
+  @apply hover:bg-fern-20;
+}
+
+:global(.dark .sketch) .popoverToggle {
+  @apply hover:bg-fern-90;
+}
--- a/src/Toolbar.tsx
+++ b/src/Toolbar.tsx
@ -11,6 +11,11 @@ import { SetAngleLength } from './components/Toolbar/setAngleLength'
 import { ConvertToVariable } from './components/Toolbar/ConvertVariable'
 import { SetAbsDistance } from './components/Toolbar/SetAbsDistance'
 import { SetAngleBetween } from './components/Toolbar/SetAngleBetween'
+import { Fragment, useEffect } from 'react'
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
+import { faSearch, faX } from '@fortawesome/free-solid-svg-icons'
+import { Popover, Transition } from '@headlessui/react'
+import styles from './Toolbar.module.css'

 export const Toolbar = () => {
  const {
@ -29,72 +34,26 @@ export const Toolbar = () => {
    programMemory: s.programMemory,
  }))

-  return (
-    <div>
-      {guiMode.mode === 'default' && (
-        <button
-          onClick={() => {
-            setGuiMode({
-              mode: 'sketch',
-              sketchMode: 'selectFace',
-            })
-          }}
-        >
-          Start Sketch
-        </button>
-      )}
-      {guiMode.mode === 'canEditExtrude' && (
-        <button
-          onClick={() => {
-            if (!ast) return
-            const pathToNode = getNodePathFromSourceRange(
-              ast,
-              selectionRanges.codeBasedSelections[0].range
-            )
-            const { modifiedAst } = sketchOnExtrudedFace(
-              ast,
-              pathToNode,
-              programMemory
-            )
-            updateAst(modifiedAst)
-          }}
-        >
-          SketchOnFace
-        </button>
-      )}
-      {(guiMode.mode === 'canEditSketch' || false) && (
-        <button
-          onClick={() => {
-            setGuiMode({
-              mode: 'sketch',
-              sketchMode: 'sketchEdit',
-              pathToNode: guiMode.pathToNode,
-              rotation: guiMode.rotation,
-              position: guiMode.position,
-            })
-          }}
-        >
-          Edit Sketch
-        </button>
-      )}
-      {guiMode.mode === 'canEditSketch' && (
-        <>
+  useEffect(() => {
+    console.log('guiMode', guiMode)
+  }, [guiMode])
+
+  function ToolbarButtons() {
+    return (
+      <>
+        {guiMode.mode === 'default' && (
          <button
            onClick={() => {
-              if (!ast) return
-              const pathToNode = getNodePathFromSourceRange(
-                ast,
-                selectionRanges.codeBasedSelections[0].range
-              )
-              const { modifiedAst, pathToExtrudeArg } = extrudeSketch(
-                ast,
-                pathToNode
-              )
-              updateAst(modifiedAst, { focusPath: pathToExtrudeArg })
+              setGuiMode({
+                mode: 'sketch',
+                sketchMode: 'selectFace',
+              })
            }}
          >
-            ExtrudeSketch
+            Start Sketch
          </button>
+        )}
+        {guiMode.mode === 'canEditExtrude' && (
          <button
            onClick={() => {
              if (!ast) return
@ -102,77 +61,182 @@ export const Toolbar = () => {
                ast,
                selectionRanges.codeBasedSelections[0].range
              )
-              const { modifiedAst, pathToExtrudeArg } = extrudeSketch(
+              const { modifiedAst } = sketchOnExtrudedFace(
                ast,
                pathToNode,
-                false
+                programMemory
              )
-              updateAst(modifiedAst, { focusPath: pathToExtrudeArg })
+              updateAst(modifiedAst)
            }}
          >
-            ExtrudeSketch (w/o pipe)
+            SketchOnFace
          </button>
-        </>
-      )}
-
-      {guiMode.mode === 'sketch' && (
-        <button onClick={() => setGuiMode({ mode: 'default' })}>
-          Exit sketch
-        </button>
-      )}
-      {toolTips
-        .filter(
-          // (sketchFnName) => !['angledLineThatIntersects'].includes(sketchFnName)
-          (sketchFnName) => ['line'].includes(sketchFnName)
-        )
-        .map((sketchFnName) => {
-          if (
-            guiMode.mode !== 'sketch' ||
-            !('isTooltip' in guiMode || guiMode.sketchMode === 'sketchEdit')
-          )
-            return null
-          return (
+        )}
+        {(guiMode.mode === 'canEditSketch' || false) && (
+          <button
+            onClick={() => {
+              setGuiMode({
+                mode: 'sketch',
+                sketchMode: 'sketchEdit',
+                pathToNode: guiMode.pathToNode,
+                rotation: guiMode.rotation,
+                position: guiMode.position,
+              })
+            }}
+          >
+            Edit Sketch
+          </button>
+        )}
+        {guiMode.mode === 'canEditSketch' && (
+          <>
            <button
-              key={sketchFnName}
-              onClick={() =>
-                setGuiMode({
-                  ...guiMode,
-                  ...(guiMode.sketchMode === sketchFnName
-                    ? {
-                        sketchMode: 'sketchEdit',
-                        // todo: ...guiMod is adding isTooltip: true, will probably just fix with xstate migtaion
-                      }
-                    : {
-                        sketchMode: sketchFnName,
-                        isTooltip: true,
-                      }),
-                })
-              }
+              onClick={() => {
+                if (!ast) return
+                const pathToNode = getNodePathFromSourceRange(
+                  ast,
+                  selectionRanges.codeBasedSelections[0].range
+                )
+                const { modifiedAst, pathToExtrudeArg } = extrudeSketch(
+                  ast,
+                  pathToNode
+                )
+                updateAst(modifiedAst, { focusPath: pathToExtrudeArg })
+              }}
            >
-              {sketchFnName}
-              {guiMode.sketchMode === sketchFnName && '✅'}
+              ExtrudeSketch
            </button>
+            <button
+              onClick={() => {
+                if (!ast) return
+                const pathToNode = getNodePathFromSourceRange(
+                  ast,
+                  selectionRanges.codeBasedSelections[0].range
+                )
+                const { modifiedAst, pathToExtrudeArg } = extrudeSketch(
+                  ast,
+                  pathToNode,
+                  false
+                )
+                updateAst(modifiedAst, { focusPath: pathToExtrudeArg })
+              }}
+            >
+              ExtrudeSketch (w/o pipe)
+            </button>
+          </>
+        )}
+
+        {guiMode.mode === 'sketch' && (
+          <button onClick={() => setGuiMode({ mode: 'default' })}>
+            Exit sketch
+          </button>
+        )}
+        {toolTips
+          .filter(
+            // (sketchFnName) => !['angledLineThatIntersects'].includes(sketchFnName)
+            (sketchFnName) => ['line'].includes(sketchFnName)
          )
-        })}
-      <br></br>
-      <ConvertToVariable />
-      <HorzVert horOrVert="horizontal" />
-      <HorzVert horOrVert="vertical" />
-      <EqualLength />
-      <EqualAngle />
-      <SetHorzVertDistance buttonType="alignEndsVertically" />
-      <SetHorzVertDistance buttonType="setHorzDistance" />
-      <SetAbsDistance buttonType="snapToYAxis" />
-      <SetAbsDistance buttonType="xAbs" />
-      <SetHorzVertDistance buttonType="alignEndsHorizontally" />
-      <SetAbsDistance buttonType="snapToXAxis" />
-      <SetHorzVertDistance buttonType="setVertDistance" />
-      <SetAbsDistance buttonType="yAbs" />
-      <SetAngleLength angleOrLength="setAngle" />
-      <SetAngleLength angleOrLength="setLength" />
-      <Intersect />
-      <RemoveConstrainingValues />
-      <SetAngleBetween />
-    </div>
+          .map((sketchFnName) => {
+            if (
+              guiMode.mode !== 'sketch' ||
+              !('isTooltip' in guiMode || guiMode.sketchMode === 'sketchEdit')
+            )
+              return null
+            return (
+              <button
+                key={sketchFnName}
+                onClick={() =>
+                  setGuiMode({
+                    ...guiMode,
+                    ...(guiMode.sketchMode === sketchFnName
+                      ? {
+                          sketchMode: 'sketchEdit',
+                          // todo: ...guiMod is adding isTooltip: true, will probably just fix with xstate migtaion
+                        }
+                      : {
+                          sketchMode: sketchFnName,
+                          isTooltip: true,
+                        }),
+                  })
+                }
+              >
+                {sketchFnName}
+                {guiMode.sketchMode === sketchFnName && '✅'}
+              </button>
+            )
+          })}
+        <ConvertToVariable />
+        <HorzVert horOrVert="horizontal" />
+        <HorzVert horOrVert="vertical" />
+        <EqualLength />
+        <EqualAngle />
+        <SetHorzVertDistance buttonType="alignEndsVertically" />
+        <SetHorzVertDistance buttonType="setHorzDistance" />
+        <SetAbsDistance buttonType="snapToYAxis" />
+        <SetAbsDistance buttonType="xAbs" />
+        <SetHorzVertDistance buttonType="alignEndsHorizontally" />
+        <SetAbsDistance buttonType="snapToXAxis" />
+        <SetHorzVertDistance buttonType="setVertDistance" />
+        <SetAbsDistance buttonType="yAbs" />
+        <SetAngleLength angleOrLength="setAngle" />
+        <SetAngleLength angleOrLength="setLength" />
+        <Intersect />
+        <RemoveConstrainingValues />
+        <SetAngleBetween />
+      </>
+    )
+  }
+
+  return (
+    <Popover className={styles.toolbarWrapper + ' ' + guiMode.mode}>
+      <div className={styles.toolbar}>
+        <span className={styles.toolbarCap + ' ' + styles.label}>
+          {guiMode.mode === 'sketch' ? '2D' : '3D'}
+        </span>
+        <menu className="flex flex-1 gap-2 py-0.5 overflow-hidden whitespace-nowrap">
+          <ToolbarButtons />
+        </menu>
+        <Popover.Button
+          className={styles.toolbarCap + ' ' + styles.popoverToggle}
+        >
+          <FontAwesomeIcon icon={faSearch} />
+        </Popover.Button>
+      </div>
+      <Transition
+        as={Fragment}
+        enter="transition ease-out duration-200"
+        enterFrom="opacity-0"
+        enterTo="opacity-100"
+        leave="transition ease-out duration-100"
+        leaveFrom="opacity-100"
+        leaveTo="opacity-0"
+      >
+        <Popover.Overlay className="fixed inset-0 bg-chalkboard-110/20 dark:bg-chalkboard-110/50" />
+      </Transition>
+      <Transition
+        as={Fragment}
+        enter="transition ease-out duration-100"
+        enterFrom="opacity-0 translate-y-1 scale-95"
+        enterTo="opacity-100 translate-y-0 scale-100"
+        leave="transition ease-out duration-75"
+        leaveFrom="opacity-100 translate-y-0"
+        leaveTo="opacity-0 translate-y-2"
+      >
+        <Popover.Panel className="absolute top-0 w-screen max-w-xl left-1/2 -translate-x-1/2 flex flex-col gap-8 bg-chalkboard-10 dark:bg-chalkboard-100 p-5 rounded border border-chalkboard-20/30 dark:border-chalkboard-70/50">
+          <section className="flex justify-between items-center">
+            <p
+              className={`${styles.toolbarCap} ${styles.label} !self-center rounded-r-full w-fit`}
+            >
+              You're in {guiMode.mode === 'sketch' ? '2D' : '3D'}
+            </p>
+            <Popover.Button className="p-2 flex items-center justify-center rounded-sm bg-chalkboard-20 text-chalkboard-110 dark:bg-chalkboard-70 dark:text-chalkboard-20 border-none hover:bg-chalkboard-30 dark:hover:bg-chalkboard-60">
+              <FontAwesomeIcon icon={faX} className="w-4 h-4" />
+            </Popover.Button>
+          </section>
+          <section>
+            <ToolbarButtons />
+          </section>
+        </Popover.Panel>
+      </Transition>
+    </Popover>
  )
 }
--- a/src/components/ActionIcon.tsx
+++ b/src/components/ActionIcon.tsx
@ -8,11 +8,13 @@ import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
 const iconSizes = {
  sm: 12,
  md: 14.4,
-  lg: 18,
+  lg: 20,
+  xl: 28,
 }

 export interface ActionIconProps extends React.PropsWithChildren {
  icon?: SolidIconDefinition | BrandIconDefinition
+  className?: string
  bgClassName?: string
  iconClassName?: string
  size?: keyof typeof iconSizes
@ -20,6 +22,7 @@ export interface ActionIconProps extends React.PropsWithChildren {

 export const ActionIcon = ({
  icon = faCircleExclamation,
+  className,
  bgClassName,
  iconClassName,
  size = 'md',
@ -28,7 +31,9 @@ export const ActionIcon = ({
  return (
    <div
      className={
-        'p-1 w-fit inline-grid place-content-center ' +
+        `p-${
+          size === 'xl' ? '2' : '1'
+        } w-fit inline-grid place-content-center ${className} ` +
        (bgClassName ||
          'bg-chalkboard-100 group-hover:bg-chalkboard-90 hover:bg-chalkboard-90 dark:bg-liquid-20 dark:group-hover:bg-liquid-10 dark:hover:bg-liquid-10')
      }
@ -40,7 +45,7 @@ export const ActionIcon = ({
          height={iconSizes[size]}
          className={
            iconClassName ||
-            'text-liquid-20 group-hover:text-liquid-10 hover:text-liquid-10 dark:text-liquid-100 dark:group-hover:text-liquid-100 dark:hover:text-liquid-100'
+            'text-liquid-20 h-auto group-hover:text-liquid-10 hover:text-liquid-10 dark:text-liquid-100 dark:group-hover:text-liquid-100 dark:hover:text-liquid-100'
          }
        />
      )}
--- a/src/components/AppHeader.module.css
+++ b/src/components/AppHeader.module.css
@ -0,0 +1,7 @@
+/*
+  Some CSS cannot be represented
+  in Tailwind, such as complex grid layouts.
+ */
+.header {
+  grid-template-columns: 1fr auto 1fr;
+}
--- a/src/components/AppHeader.tsx
+++ b/src/components/AppHeader.tsx
@ -2,7 +2,8 @@ import { Toolbar } from '../Toolbar'
 import UserSidebarMenu from './UserSidebarMenu'
 import { ProjectWithEntryPointMetadata } from '../Router'
 import ProjectSidebarMenu from './ProjectSidebarMenu'
-import { useAuthMachine } from '../hooks/useAuthMachine'
+import { useGlobalStateContext } from 'hooks/useGlobalStateContext'
+import styles from './AppHeader.module.css'

 interface AppHeaderProps extends React.PropsWithChildren {
  showToolbar?: boolean
@ -18,12 +19,18 @@ export const AppHeader = ({
  className = '',
  enableMenu = false,
 }: AppHeaderProps) => {
-  const [user] = useAuthMachine((s) => s?.context?.user)
+  const {
+    auth: {
+      context: { user },
+    },
+  } = useGlobalStateContext()

  return (
    <header
      className={
-        'overlaid-panes sticky top-0 z-20 py-1 px-5 bg-chalkboard-10/50 dark:bg-chalkboard-100/50 border-b dark:border-b-2 border-chalkboard-30 dark:border-chalkboard-90 flex justify-between items-center ' +
+        (showToolbar ? 'grid ' : 'flex justify-between ') +
+        styles.header +
+        ' overlaid-panes sticky top-0 z-20 py-1 px-5 bg-chalkboard-10/70 dark:bg-chalkboard-100/50 border-b dark:border-b-2 border-chalkboard-30 dark:border-chalkboard-90 items-center ' +
        className
      }
    >
@ -35,7 +42,11 @@ export const AppHeader = ({
        </div>
      )}
      {/* If there are children, show them, otherwise show User menu */}
-      {children || <UserSidebarMenu user={user} />}
+      {children || (
+        <div className="ml-auto">
+          <UserSidebarMenu user={user} />
+        </div>
+      )}
    </header>
  )
 }
--- a/src/components/CollapsiblePanel.module.css
+++ b/src/components/CollapsiblePanel.module.css
@ -1,10 +1,10 @@
 .panel {
  @apply relative overflow-auto z-0;
-  @apply bg-chalkboard-20/40;
+  @apply bg-chalkboard-10/70 backdrop-blur-sm;
 }

 :global(.dark) .panel {
-  @apply bg-chalkboard-110/50;
+  @apply bg-chalkboard-110/50 backdrop-blur-0;
 }

 .header {
--- a/src/components/CommandBar.tsx
+++ b/src/components/CommandBar.tsx
@ -0,0 +1,290 @@
+import { Combobox, Dialog, Transition } from '@headlessui/react'
+import {
+  Dispatch,
+  Fragment,
+  SetStateAction,
+  createContext,
+  useState,
+} from 'react'
+import { useHotkeys } from 'react-hotkeys-hook'
+import { ActionIcon } from './ActionIcon'
+import { faSearch } from '@fortawesome/free-solid-svg-icons'
+import Fuse from 'fuse.js'
+import { Command, SubCommand } from '../lib/commands'
+import { useCommandsContext } from 'hooks/useCommandsContext'
+
+export type SortedCommand = {
+  item: Partial<Command | SubCommand> & { name: string }
+}
+
+export const CommandsContext = createContext(
+  {} as {
+    commands: Command[]
+    addCommands: (commands: Command[]) => void
+    removeCommands: (commands: Command[]) => void
+    commandBarOpen: boolean
+    setCommandBarOpen: Dispatch<SetStateAction<boolean>>
+  }
+)
+
+export const CommandBarProvider = ({
+  children,
+}: {
+  children: React.ReactNode
+}) => {
+  const [commands, internalSetCommands] = useState([] as Command[])
+  const [commandBarOpen, setCommandBarOpen] = useState(false)
+
+  const addCommands = (newCommands: Command[]) => {
+    internalSetCommands((prevCommands) => [...newCommands, ...prevCommands])
+  }
+  const removeCommands = (newCommands: Command[]) => {
+    internalSetCommands((prevCommands) =>
+      prevCommands.filter((command) => !newCommands.includes(command))
+    )
+  }
+
+  return (
+    <CommandsContext.Provider
+      value={{
+        commands,
+        addCommands,
+        removeCommands,
+        commandBarOpen,
+        setCommandBarOpen,
+      }}
+    >
+      {children}
+      <CommandBar />
+    </CommandsContext.Provider>
+  )
+}
+
+const CommandBar = () => {
+  const { commands, commandBarOpen, setCommandBarOpen } = useCommandsContext()
+  useHotkeys('meta+k', () => {
+    if (commands.length === 0) return
+    setCommandBarOpen(!commandBarOpen)
+  })
+
+  const [selectedCommand, setSelectedCommand] = useState<SortedCommand | null>(
+    null
+  )
+  // keep track of the current subcommand index
+  const [subCommandIndex, setSubCommandIndex] = useState<number>()
+  const [subCommandData, setSubCommandData] = useState<{
+    [key: string]: string
+  }>({})
+
+  // if the subcommand index is null, we're not in a subcommand
+  const inSubCommand =
+    selectedCommand &&
+    'meta' in selectedCommand.item &&
+    selectedCommand.item.meta?.args !== undefined &&
+    subCommandIndex !== undefined
+  const currentSubCommand =
+    inSubCommand && 'meta' in selectedCommand.item
+      ? selectedCommand.item.meta?.args[subCommandIndex]
+      : undefined
+
+  const [query, setQuery] = useState('')
+
+  const availableCommands =
+    inSubCommand && currentSubCommand
+      ? currentSubCommand.type === 'string'
+        ? query
+          ? [{ name: query }]
+          : currentSubCommand.options
+        : currentSubCommand.options
+      : commands
+
+  const fuse = new Fuse(availableCommands || [], {
+    keys: ['name', 'description'],
+  })
+
+  const filteredCommands = query
+    ? fuse.search(query)
+    : availableCommands?.map((c) => ({ item: c } as SortedCommand))
+
+  function clearState() {
+    setQuery('')
+    setCommandBarOpen(false)
+    setSelectedCommand(null)
+    setSubCommandIndex(undefined)
+    setSubCommandData({})
+  }
+
+  function handleCommandSelection(entry: SortedCommand) {
+    // If we have subcommands and have not yet gathered all the
+    // data required from them, set the selected command to the
+    // current command and increment the subcommand index
+    if (selectedCommand === null && 'meta' in entry.item && entry.item.meta) {
+      setSelectedCommand(entry)
+      setSubCommandIndex(0)
+      setQuery('')
+      return
+    }
+
+    const { item } = entry
+    // If we have just selected a command with no subcommands, run it
+    const isCommandWithoutSubcommands =
+      'callback' in item && !('meta' in item && item.meta)
+    if (isCommandWithoutSubcommands) {
+      if (item.callback === undefined) return
+      item.callback()
+      setCommandBarOpen(false)
+      return
+    }
+
+    // If we have subcommands and have not yet gathered all the
+    // data required from them, set the selected command to the
+    // current command and increment the subcommand index
+    if (
+      selectedCommand &&
+      subCommandIndex !== undefined &&
+      'meta' in selectedCommand.item
+    ) {
+      const subCommand = selectedCommand.item.meta?.args[subCommandIndex]
+
+      if (subCommand) {
+        const newSubCommandData = {
+          ...subCommandData,
+          [subCommand.name]: item.name,
+        }
+        const newSubCommandIndex = subCommandIndex + 1
+
+        // If we have subcommands and have gathered all the data required
+        // from them, run the command with the gathered data
+        if (
+          selectedCommand.item.callback &&
+          selectedCommand.item.meta?.args.length === newSubCommandIndex
+        ) {
+          selectedCommand.item.callback(newSubCommandData)
+          setCommandBarOpen(false)
+        } else {
+          // Otherwise, set the subcommand data and increment the subcommand index
+          setSubCommandData(newSubCommandData)
+          setSubCommandIndex(newSubCommandIndex)
+          setQuery('')
+        }
+      }
+    }
+  }
+
+  function getDisplayValue(command: Command) {
+    if (command.meta?.displayValue === undefined || !command.meta.args)
+      return command.name
+    return command.meta?.displayValue(
+      command.meta.args.map((c) =>
+        subCommandData[c.name] ? subCommandData[c.name] : `<${c.name}>`
+      )
+    )
+  }
+
+  return (
+    <Transition.Root
+      show={
+        commandBarOpen &&
+        availableCommands?.length !== undefined &&
+        availableCommands.length > 0
+      }
+      as={Fragment}
+      afterLeave={() => clearState()}
+    >
+      <Dialog
+        onClose={() => {
+          setCommandBarOpen(false)
+          clearState()
+        }}
+        className="fixed inset-0 overflow-y-auto p-4 pt-[25vh]"
+      >
+        <Transition.Child
+          enter="duration-100 ease-out"
+          enterFrom="opacity-0"
+          enterTo="opacity-100"
+          leave="duration-75 ease-in"
+          leaveFrom="opacity-100"
+          leaveTo="opacity-0"
+          as={Fragment}
+        >
+          <Dialog.Overlay className="fixed z-40 inset-0 bg-chalkboard-10/70 dark:bg-chalkboard-110/50" />
+        </Transition.Child>
+        <Transition.Child
+          enter="duration-100 ease-out"
+          enterFrom="opacity-0 scale-95"
+          enterTo="opacity-100 scale-100"
+          leave="duration-75 ease-in"
+          leaveFrom="opacity-100 scale-100"
+          leaveTo="opacity-0 scale-95"
+          as={Fragment}
+        >
+          <Combobox
+            value={selectedCommand}
+            onChange={handleCommandSelection}
+            className="rounded relative mx-auto z-40 p-2 bg-chalkboard-10 dark:bg-chalkboard-100 border dark:border-chalkboard-70 max-w-xl w-full shadow-lg"
+            as="div"
+          >
+            <div className="flex gap-2 items-center">
+              <ActionIcon icon={faSearch} size="xl" className="rounded-sm" />
+              <div>
+                {inSubCommand && (
+                  <p className="text-liquid-70 dark:text-liquid-30">
+                    {selectedCommand.item &&
+                      getDisplayValue(selectedCommand.item as Command)}
+                  </p>
+                )}
+                <Combobox.Input
+                  onChange={(event) => setQuery(event.target.value)}
+                  className="bg-transparent focus:outline-none w-full"
+                  onKeyDown={(event) => {
+                    if (event.metaKey && event.key === 'k')
+                      setCommandBarOpen(false)
+                    if (
+                      inSubCommand &&
+                      event.key === 'Backspace' &&
+                      !event.currentTarget.value
+                    ) {
+                      setSubCommandIndex(subCommandIndex - 1)
+                      setSelectedCommand(null)
+                    }
+                  }}
+                  displayValue={(command: SortedCommand) =>
+                    command !== null ? command.item.name : ''
+                  }
+                  placeholder={
+                    inSubCommand
+                      ? `Enter <${currentSubCommand?.name}>`
+                      : 'Search for a command'
+                  }
+                  value={query}
+                  autoCapitalize="off"
+                  autoComplete="off"
+                  autoCorrect="off"
+                  spellCheck="false"
+                />
+              </div>
+            </div>
+            <Combobox.Options static className="max-h-96 overflow-y-auto">
+              {filteredCommands?.map((commandResult) => (
+                <Combobox.Option
+                  key={commandResult.item.name}
+                  value={commandResult}
+                  className="my-2 first:mt-4 last:mb-4 ui-active:bg-liquid-10 dark:ui-active:bg-liquid-90 py-1 px-2"
+                >
+                  <p>{commandResult.item.name}</p>
+                  {(commandResult.item as SubCommand).description && (
+                    <p className="mt-0.5 text-liquid-70 dark:text-liquid-30 text-sm">
+                      {(commandResult.item as SubCommand).description}
+                    </p>
+                  )}
+                </Combobox.Option>
+              ))}
+            </Combobox.Options>
+          </Combobox>
+        </Transition.Child>
+      </Dialog>
+    </Transition.Root>
+  )
+}
+
+export default CommandBarProvider
--- a/src/components/DebugPanel.tsx
+++ b/src/components/DebugPanel.tsx
@ -5,6 +5,7 @@ import { EngineCommand } from '../lang/std/engineConnection'
 import { useState } from 'react'
 import { ActionButton } from '../components/ActionButton'
 import { faCheck } from '@fortawesome/free-solid-svg-icons'
+import { isReducedMotion } from 'lang/util'

 type SketchModeCmd = Extract<
  Extract<EngineCommand, { type: 'modeling_cmd_req' }>['cmd'],
@ -22,7 +23,7 @@ export const DebugPanel = ({ className, ...props }: CollapsiblePanelProps) => {
    y_axis: { x: 0, y: 1, z: 0 },
    distance_to_plane: 100,
    ortho: true,
-    animated: true, // TODO #273 get prefers reduced motion from CSS
+    animated: !isReducedMotion(),
  })
  if (!sketchModeCmd) return null
  return (
--- a/src/components/ExportButton.tsx
+++ b/src/components/ExportButton.tsx
@ -39,6 +39,7 @@ export const ExportButton = ({ children, className }: ExportButtonProps) => {
  const initialValues: OutputFormat = {
    type: defaultType,
    storage: 'embedded',
+    presentation: 'pretty',
  }
  const formik = useFormik({
    initialValues,
@ -127,7 +128,9 @@ export const ExportButton = ({ children, className }: ExportButtonProps) => {
                  id="storage"
                  name="storage"
                  onChange={formik.handleChange}
-                  value={formik.values.storage}
+                  value={
+                    'storage' in formik.values ? formik.values.storage : ''
+                  }
                  className="bg-chalkboard-20 dark:bg-chalkboard-90 w-full"
                >
                  {type === 'gltf' && (
--- a/src/components/GlobalStateProvider.tsx
+++ b/src/components/GlobalStateProvider.tsx
@ -0,0 +1,158 @@
+import { useMachine } from '@xstate/react'
+import { useNavigate } from 'react-router-dom'
+import { paths } from '../Router'
+import {
+  authCommandBarMeta,
+  authMachine,
+  TOKEN_PERSIST_KEY,
+} from '../machines/authMachine'
+import withBaseUrl from '../lib/withBaseURL'
+import React, { createContext, useEffect, useRef } from 'react'
+import useStateMachineCommands from '../hooks/useStateMachineCommands'
+import {
+  SETTINGS_PERSIST_KEY,
+  settingsCommandBarMeta,
+  settingsMachine,
+} from 'machines/settingsMachine'
+import { toast } from 'react-hot-toast'
+import { setThemeClass, Themes } from 'lib/theme'
+import {
+  AnyStateMachine,
+  ContextFrom,
+  InterpreterFrom,
+  Prop,
+  StateFrom,
+} from 'xstate'
+import { useCommandsContext } from 'hooks/useCommandsContext'
+
+type MachineContext<T extends AnyStateMachine> = {
+  state: StateFrom<T>
+  context: ContextFrom<T>
+  send: Prop<InterpreterFrom<T>, 'send'>
+}
+
+type GlobalContext = {
+  auth: MachineContext<typeof authMachine>
+  settings: MachineContext<typeof settingsMachine>
+}
+
+export const GlobalStateContext = createContext({} as GlobalContext)
+
+export const GlobalStateProvider = ({
+  children,
+}: {
+  children: React.ReactNode
+}) => {
+  const navigate = useNavigate()
+  const { commands } = useCommandsContext()
+
+  // Settings machine setup
+  const retrievedSettings = useRef(
+    localStorage?.getItem(SETTINGS_PERSIST_KEY) || '{}'
+  )
+  const persistedSettings = Object.assign(
+    settingsMachine.initialState.context,
+    JSON.parse(retrievedSettings.current) as Partial<
+      (typeof settingsMachine)['context']
+    >
+  )
+
+  const [settingsState, settingsSend] = useMachine(settingsMachine, {
+    context: persistedSettings,
+    actions: {
+      toastSuccess: (context, event) => {
+        const truncatedNewValue =
+          'data' in event && event.data instanceof Object
+            ? (context[Object.keys(event.data)[0] as keyof typeof context]
+                .toString()
+                .substring(0, 28) as any)
+            : undefined
+        toast.success(
+          event.type +
+            (truncatedNewValue
+              ? ` to "${truncatedNewValue}${
+                  truncatedNewValue.length === 28 ? '...' : ''
+                }"`
+              : '')
+        )
+      },
+    },
+  })
+
+  useStateMachineCommands({
+    state: settingsState,
+    send: settingsSend,
+    commands,
+    owner: 'settings',
+    commandBarMeta: settingsCommandBarMeta,
+  })
+
+  // Listen for changes to the system theme and update the app theme accordingly
+  // This is only done if the theme setting is set to 'system'.
+  // It can't be done in XState (in an invoked callback, for example)
+  // because there doesn't seem to be a good way to listen to
+  // events outside of the machine that also depend on the machine's context
+  useEffect(() => {
+    const matcher = window.matchMedia('(prefers-color-scheme: dark)')
+    const listener = (e: MediaQueryListEvent) => {
+      if (settingsState.context.theme !== 'system') return
+      setThemeClass(e.matches ? Themes.Dark : Themes.Light)
+    }
+
+    matcher.addEventListener('change', listener)
+    return () => matcher.removeEventListener('change', listener)
+  }, [settingsState.context])
+
+  // Auth machine setup
+  const [authState, authSend] = useMachine(authMachine, {
+    actions: {
+      goToSignInPage: () => {
+        navigate(paths.SIGN_IN)
+        logout()
+      },
+      goToIndexPage: () => {
+        if (window.location.pathname.includes(paths.SIGN_IN)) {
+          navigate(paths.INDEX)
+        }
+      },
+    },
+  })
+
+  useStateMachineCommands({
+    state: authState,
+    send: authSend,
+    commands,
+    commandBarMeta: authCommandBarMeta,
+    owner: 'auth',
+  })
+
+  return (
+    <GlobalStateContext.Provider
+      value={{
+        auth: {
+          state: authState,
+          context: authState.context,
+          send: authSend,
+        },
+        settings: {
+          state: settingsState,
+          context: settingsState.context,
+          send: settingsSend,
+        },
+      }}
+    >
+      {children}
+    </GlobalStateContext.Provider>
+  )
+}
+
+export default GlobalStateProvider
+
+export function logout() {
+  const url = withBaseUrl('/logout')
+  localStorage.removeItem(TOKEN_PERSIST_KEY)
+  return fetch(url, {
+    method: 'POST',
+    credentials: 'include',
+  })
+}
--- a/src/components/Logs.tsx
+++ b/src/components/Logs.tsx
@ -1,7 +1,8 @@
 import ReactJson from 'react-json-view'
 import { useEffect } from 'react'
-import { Themes, useStore } from '../useStore'
+import { useStore } from '../useStore'
 import { CollapsiblePanel, CollapsiblePanelProps } from './CollapsiblePanel'
+import { Themes } from '../lib/theme'

 const ReactJsonTypeHack = ReactJson as any

--- a/src/components/MemoryPanel.test.tsx
+++ b/src/components/MemoryPanel.test.tsx
@ -14,12 +14,12 @@ describe('processMemory', () => {
    return a - 2
  }
  const otherVar = myFn(5)
-  
-  const theExtrude = startSketchAt([0, 0]) 
+
+  const theExtrude = startSketchAt([0, 0])
    |> lineTo([-2.4, myVar], %)
    |> lineTo([-0.76, otherVar], %)
    |> extrude(4, %)
-  
+
  const theSketch = startSketchAt([0, 0])
    |> lineTo([-3.35, 0.17], %)
    |> lineTo([0.98, 5.16], %)
@ -28,30 +28,20 @@ describe('processMemory', () => {
  show(theExtrude, theSketch)`
    const ast = parser_wasm(code)
    const programMemory = await enginelessExecutor(ast, {
-      root: {
-        log: {
-          type: 'userVal',
-          value: (a: any) => {
-            console.log('raw log', a)
-          },
-          __meta: [],
-        },
-      },
-      pendingMemory: {},
+      root: {},
    })
    const output = processMemory(programMemory)
    expect(output.myVar).toEqual(5)
-    expect(output.myFn).toEqual('__function__')
    expect(output.otherVar).toEqual(3)
    expect(output).toEqual({
      myVar: 5,
-      myFn: '__function__',
+      myFn: undefined,
      otherVar: 3,
      theExtrude: [],
      theSketch: [
-        { type: 'toPoint', to: [-3.35, 0.17], from: [0, 0] },
-        { type: 'toPoint', to: [0.98, 5.16], from: [-3.35, 0.17] },
-        { type: 'toPoint', to: [2.15, 4.32], from: [0.98, 5.16] },
+        { type: 'toPoint', to: [-3.35, 0.17], from: [0, 0], name: '' },
+        { type: 'toPoint', to: [0.98, 5.16], from: [-3.35, 0.17], name: '' },
+        { type: 'toPoint', to: [2.15, 4.32], from: [0.98, 5.16], name: '' },
      ],
    })
  })
--- a/src/components/MemoryPanel.tsx
+++ b/src/components/MemoryPanel.tsx
@ -1,8 +1,9 @@
 import ReactJson from 'react-json-view'
 import { CollapsiblePanel, CollapsiblePanelProps } from './CollapsiblePanel'
-import { Themes, useStore } from '../useStore'
+import { useStore } from '../useStore'
 import { useMemo } from 'react'
 import { ProgramMemory } from '../lang/executor'
+import { Themes } from '../lib/theme'

 interface MemoryPanelProps extends CollapsiblePanelProps {
  theme?: Exclude<Themes, Themes.System>
--- a/src/components/ProjectSidebarMenu.tsx
+++ b/src/components/ProjectSidebarMenu.tsx
@ -1,10 +1,11 @@
-import { Popover } from '@headlessui/react'
+import { Popover, Transition } from '@headlessui/react'
 import { ActionButton } from './ActionButton'
 import { faHome } from '@fortawesome/free-solid-svg-icons'
 import { ProjectWithEntryPointMetadata, paths } from '../Router'
 import { isTauri } from '../lib/isTauri'
 import { Link } from 'react-router-dom'
 import { ExportButton } from './ExportButton'
+import { Fragment } from 'react'

 const ProjectSidebarMenu = ({
  project,
@ -34,7 +35,7 @@ const ProjectSidebarMenu = ({
  ) : (
    <Popover className="relative">
      <Popover.Button
-        className="border-0 px-1 pr-2 pl-0 flex items-center gap-4 focus:outline-none focus:ring-2 focus:ring-energy-50"
+        className="border-0 p-0.5 pr-2 flex items-center gap-4 focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-energy-50"
        data-testid="project-sidebar-toggle"
      >
        <img
@ -46,54 +47,77 @@ const ProjectSidebarMenu = ({
          {isTauri() && project?.name ? project.name : 'KittyCAD Modeling App'}
        </span>
      </Popover.Button>
-      <Popover.Overlay className="fixed z-20 inset-0 bg-chalkboard-110/50" />
+      <Transition
+        enter="duration-200 ease-out"
+        enterFrom="opacity-0"
+        enterTo="opacity-100"
+        leave="duration-100 ease-in"
+        leaveFrom="opacity-100"
+        leaveTo="opacity-0"
+        as={Fragment}
+      >
+        <Popover.Overlay className="fixed z-20 inset-0 bg-chalkboard-110/50" />
+      </Transition>

-      <Popover.Panel className="fixed inset-0 right-auto z-30 w-64 bg-chalkboard-10 dark:bg-chalkboard-100 border border-energy-100 shadow-md rounded-r-lg overflow-hidden">
-        <div className="flex items-center gap-4 px-4 py-3 bg-energy-100">
-          <img
-            src="/kitt-8bit-winking.svg"
-            alt="KittyCAD App"
-            className="h-9 w-auto"
-          />
+      <Transition
+        enter="duration-100 ease-out"
+        enterFrom="opacity-0 -translate-x-1/4"
+        enterTo="opacity-100 translate-x-0"
+        leave="duration-75 ease-in"
+        leaveFrom="opacity-100 translate-x-0"
+        leaveTo="opacity-0 -translate-x-4"
+        as={Fragment}
+      >
+        <Popover.Panel className="fixed inset-0 right-auto z-30 w-64 bg-chalkboard-10 dark:bg-chalkboard-100 border border-energy-100 dark:border-energy-100/50 shadow-md rounded-r-lg overflow-hidden">
+          <div className="flex items-center gap-4 px-4 py-3 bg-energy-100">
+            <img
+              src="/kitt-8bit-winking.svg"
+              alt="KittyCAD App"
+              className="h-9 w-auto"
+            />

-          <div>
-            <p
-              className="m-0 text-energy-10 text-mono"
-              data-testid="projectName"
-            >
-              {project?.name ? project.name : 'KittyCAD Modeling App'}
-            </p>
-            {project?.entrypoint_metadata && (
-              <p className="m-0 text-energy-40 text-xs" data-testid="createdAt">
-                Created{' '}
-                {project?.entrypoint_metadata.createdAt.toLocaleDateString()}
+            <div>
+              <p
+                className="m-0 text-energy-10 text-mono"
+                data-testid="projectName"
+              >
+                {project?.name ? project.name : 'KittyCAD Modeling App'}
              </p>
+              {project?.entrypoint_metadata && (
+                <p
+                  className="m-0 text-energy-40 text-xs"
+                  data-testid="createdAt"
+                >
+                  Created{' '}
+                  {project?.entrypoint_metadata.createdAt.toLocaleDateString()}
+                </p>
+              )}
+            </div>
+          </div>
+          <div className="p-4 flex flex-col gap-2">
+            <ExportButton
+              className={{
+                button:
+                  'border-transparent dark:border-transparent dark:hover:border-energy-60',
+              }}
+            >
+              Export Model
+            </ExportButton>
+            {isTauri() && (
+              <ActionButton
+                Element="link"
+                to={paths.HOME}
+                icon={{
+                  icon: faHome,
+                }}
+                className="border-transparent dark:border-transparent dark:hover:border-energy-60"
+              >
+                Go to Home
+              </ActionButton>
            )}
          </div>
-        </div>
-        <div className="p-4 flex flex-col gap-2">
-          <ExportButton
-            className={{
-              button:
-                'border-transparent dark:border-transparent dark:hover:border-energy-60',
-            }}
-          >
-            Export Model
-          </ExportButton>
-          {isTauri() && (
-            <ActionButton
-              Element="link"
-              to={paths.HOME}
-              icon={{
-                icon: faHome,
-              }}
-              className="border-transparent dark:border-transparent dark:hover:border-energy-60"
-            >
-              Go to Home
-            </ActionButton>
-          )}
-        </div>
-      </Popover.Panel>
+        </Popover.Panel>
+      </Transition>
    </Popover>
  )
 }
--- a/src/components/Stream.tsx
+++ b/src/components/Stream.tsx
@ -17,7 +17,6 @@ export const Stream = ({ className = '' }) => {
    mediaStream,
    engineCommandManager,
    setIsMouseDownInStream,
-    setCmdId,
    didDragInStream,
    setDidDragInStream,
    streamDimensions,
@ -27,7 +26,6 @@ export const Stream = ({ className = '' }) => {
    isMouseDownInStream: s.isMouseDownInStream,
    setIsMouseDownInStream: s.setIsMouseDownInStream,
    fileId: s.fileId,
-    setCmdId: s.setCmdId,
    didDragInStream: s.didDragInStream,
    setDidDragInStream: s.setDidDragInStream,
    streamDimensions: s.streamDimensions,
@ -59,7 +57,6 @@ export const Stream = ({ className = '' }) => {
    console.log('click', x, y)

    const newId = uuidv4()
-    setCmdId(newId)

    const interaction = ctrlKey ? 'pan' : 'rotate'

--- a/src/components/UserSidebarMenu.test.tsx
+++ b/src/components/UserSidebarMenu.test.tsx
@ -2,7 +2,8 @@ import { fireEvent, render, screen } from '@testing-library/react'
 import UserSidebarMenu from './UserSidebarMenu'
 import { BrowserRouter } from 'react-router-dom'
 import { Models } from '@kittycad/lib'
-import { GlobalStateProvider } from '../hooks/useAuthMachine'
+import { GlobalStateProvider } from './GlobalStateProvider'
+import CommandBarProvider from './CommandBar'

 type User = Models['User_type']

@ -94,7 +95,9 @@ function TestWrap({ children }: { children: React.ReactNode }) {
  // wrap in router and xState context
  return (
    <BrowserRouter>
-      <GlobalStateProvider>{children}</GlobalStateProvider>
+      <CommandBarProvider>
+        <GlobalStateProvider>{children}</GlobalStateProvider>
+      </CommandBarProvider>
    </BrowserRouter>
  )
 }
--- a/src/components/UserSidebarMenu.tsx
+++ b/src/components/UserSidebarMenu.tsx
@ -1,13 +1,13 @@
-import { Popover } from '@headlessui/react'
+import { Popover, Transition } from '@headlessui/react'
 import { ActionButton } from './ActionButton'
 import { faBars, faGear, faSignOutAlt } from '@fortawesome/free-solid-svg-icons'
 import { faGithub } from '@fortawesome/free-brands-svg-icons'
 import { useNavigate } from 'react-router-dom'
-import { useState } from 'react'
+import { Fragment, useState } from 'react'
 import { paths } from '../Router'
 import makeUrlPathRelative from '../lib/makeUrlPathRelative'
-import { useAuthMachine } from '../hooks/useAuthMachine'
 import { Models } from '@kittycad/lib'
+import { useGlobalStateContext } from 'hooks/useGlobalStateContext'

 type User = Models['User_type']

@ -15,7 +15,9 @@ const UserSidebarMenu = ({ user }: { user?: User }) => {
  const displayedName = getDisplayName(user)
  const [imageLoadFailed, setImageLoadFailed] = useState(false)
  const navigate = useNavigate()
-  const [_, send] = useAuthMachine()
+  const {
+    auth: { send },
+  } = useGlobalStateContext()

  // Fallback logic for displaying user's "name":
  // 1. user.name
@ -59,82 +61,102 @@ const UserSidebarMenu = ({ user }: { user?: User }) => {
          Menu
        </ActionButton>
      )}
-      <Popover.Overlay className="fixed z-20 inset-0 bg-chalkboard-110/50" />
+      <Transition
+        enter="duration-200 ease-out"
+        enterFrom="opacity-0"
+        enterTo="opacity-100"
+        leave="duration-100 ease-in"
+        leaveFrom="opacity-100"
+        leaveTo="opacity-0"
+        as={Fragment}
+      >
+        <Popover.Overlay className="fixed z-20 inset-0 bg-chalkboard-110/50" />
+      </Transition>

-      <Popover.Panel className="fixed inset-0 left-auto z-30 w-64 bg-chalkboard-10 dark:bg-chalkboard-100 border border-liquid-100 shadow-md rounded-l-lg overflow-hidden">
-        {({ close }) => (
-          <>
-            {user && (
-              <div className="flex items-center gap-4 px-4 py-3 bg-liquid-100">
-                {user.image && !imageLoadFailed && (
-                  <div className="rounded-full shadow-inner overflow-hidden">
-                    <img
-                      src={user.image}
-                      alt={user.name || ''}
-                      className="h-8 w-8"
-                      referrerPolicy="no-referrer"
-                      onError={() => setImageLoadFailed(true)}
-                    />
-                  </div>
-                )}
-
-                <div>
-                  <p
-                    className="m-0 text-liquid-10 text-mono"
-                    data-testid="username"
-                  >
-                    {displayedName || ''}
-                  </p>
-                  {displayedName !== user.email && (
-                    <p
-                      className="m-0 text-liquid-40 text-xs"
-                      data-testid="email"
-                    >
-                      {user.email}
-                    </p>
+      <Transition
+        enter="duration-100 ease-out"
+        enterFrom="opacity-0 translate-x-1/4"
+        enterTo="opacity-100 translate-x-0"
+        leave="duration-75 ease-in"
+        leaveFrom="opacity-100 translate-x-0"
+        leaveTo="opacity-0 translate-x-4"
+        as={Fragment}
+      >
+        <Popover.Panel className="fixed inset-0 left-auto z-30 w-64 bg-chalkboard-10 dark:bg-chalkboard-100 border border-liquid-100 dark:border-liquid-100/50 shadow-md rounded-l-lg overflow-hidden">
+          {({ close }) => (
+            <>
+              {user && (
+                <div className="flex items-center gap-4 px-4 py-3 bg-liquid-100">
+                  {user.image && !imageLoadFailed && (
+                    <div className="rounded-full shadow-inner overflow-hidden">
+                      <img
+                        src={user.image}
+                        alt={user.name || ''}
+                        className="h-8 w-8"
+                        referrerPolicy="no-referrer"
+                        onError={() => setImageLoadFailed(true)}
+                      />
+                    </div>
                  )}
+
+                  <div>
+                    <p
+                      className="m-0 text-liquid-10 text-mono"
+                      data-testid="username"
+                    >
+                      {displayedName || ''}
+                    </p>
+                    {displayedName !== user.email && (
+                      <p
+                        className="m-0 text-liquid-40 text-xs"
+                        data-testid="email"
+                      >
+                        {user.email}
+                      </p>
+                    )}
+                  </div>
                </div>
+              )}
+              <div className="p-4 flex flex-col gap-2">
+                <ActionButton
+                  Element="button"
+                  icon={{ icon: faGear }}
+                  className="border-transparent dark:border-transparent dark:hover:border-liquid-60"
+                  onClick={() => {
+                    // since /settings is a nested route the sidebar doesn't close
+                    // automatically when navigating to it
+                    close()
+                    navigate(makeUrlPathRelative(paths.SETTINGS))
+                  }}
+                >
+                  Settings
+                </ActionButton>
+                <ActionButton
+                  Element="link"
+                  to="https://github.com/KittyCAD/modeling-app/discussions"
+                  icon={{ icon: faGithub }}
+                  className="border-transparent dark:border-transparent dark:hover:border-liquid-60"
+                >
+                  Request a feature
+                </ActionButton>
+                <ActionButton
+                  Element="button"
+                  onClick={() => send('Log out')}
+                  icon={{
+                    icon: faSignOutAlt,
+                    bgClassName: 'bg-destroy-80',
+                    iconClassName:
+                      'text-destroy-20 group-hover:text-destroy-10 hover:text-destroy-10',
+                  }}
+                  className="border-transparent dark:border-transparent hover:border-destroy-40 dark:hover:border-destroy-60"
+                >
+                  Sign out
+                </ActionButton>
              </div>
-            )}
-            <div className="p-4 flex flex-col gap-2">
-              <ActionButton
-                Element="button"
-                icon={{ icon: faGear }}
-                className="border-transparent dark:border-transparent dark:hover:border-liquid-60"
-                onClick={() => {
-                  // since /settings is a nested route the sidebar doesn't close
-                  // automatically when navigating to it
-                  close()
-                  navigate(makeUrlPathRelative(paths.SETTINGS))
-                }}
-              >
-                Settings
-              </ActionButton>
-              <ActionButton
-                Element="link"
-                to="https://github.com/KittyCAD/modeling-app/discussions"
-                icon={{ icon: faGithub }}
-                className="border-transparent dark:border-transparent dark:hover:border-liquid-60"
-              >
-                Request a feature
-              </ActionButton>
-              <ActionButton
-                Element="button"
-                onClick={() => send('logout')}
-                icon={{
-                  icon: faSignOutAlt,
-                  bgClassName: 'bg-destroy-80',
-                  iconClassName:
-                    'text-destroy-20 group-hover:text-destroy-10 hover:text-destroy-10',
-                }}
-                className="border-transparent dark:border-transparent hover:border-destroy-40 dark:hover:border-destroy-60"
-              >
-                Sign out
-              </ActionButton>
-            </div>
-          </>
-        )}
-      </Popover.Panel>
+            </>
+          )}
+        </Popover.Panel>
+      </Transition>
    </Popover>
  )
 }
--- a/src/editor/lsp/client.ts
+++ b/src/editor/lsp/client.ts
@ -0,0 +1,185 @@
+import * as jsrpc from 'json-rpc-2.0'
+import * as LSP from 'vscode-languageserver-protocol'
+
+import {
+  registerServerCapability,
+  unregisterServerCapability,
+} from './server-capability-registration'
+import { Codec, FromServer, IntoServer } from './codec'
+
+const client_capabilities: LSP.ClientCapabilities = {
+  textDocument: {
+    hover: {
+      dynamicRegistration: true,
+      contentFormat: ['plaintext', 'markdown'],
+    },
+    moniker: {},
+    synchronization: {
+      dynamicRegistration: true,
+      willSave: false,
+      didSave: false,
+      willSaveWaitUntil: false,
+    },
+    completion: {
+      dynamicRegistration: true,
+      completionItem: {
+        snippetSupport: false,
+        commitCharactersSupport: true,
+        documentationFormat: ['plaintext', 'markdown'],
+        deprecatedSupport: false,
+        preselectSupport: false,
+      },
+      contextSupport: false,
+    },
+    signatureHelp: {
+      dynamicRegistration: true,
+      signatureInformation: {
+        documentationFormat: ['plaintext', 'markdown'],
+      },
+    },
+    declaration: {
+      dynamicRegistration: true,
+      linkSupport: true,
+    },
+    definition: {
+      dynamicRegistration: true,
+      linkSupport: true,
+    },
+    typeDefinition: {
+      dynamicRegistration: true,
+      linkSupport: true,
+    },
+    implementation: {
+      dynamicRegistration: true,
+      linkSupport: true,
+    },
+  },
+  workspace: {
+    didChangeConfiguration: {
+      dynamicRegistration: true,
+    },
+  },
+}
+
+export default class Client extends jsrpc.JSONRPCServerAndClient {
+  afterInitializedHooks: (() => Promise<void>)[] = []
+  #fromServer: FromServer
+  private serverCapabilities: LSP.ServerCapabilities<any> = {}
+
+  constructor(fromServer: FromServer, intoServer: IntoServer) {
+    super(
+      new jsrpc.JSONRPCServer(),
+      new jsrpc.JSONRPCClient(async (json: jsrpc.JSONRPCRequest) => {
+        const encoded = Codec.encode(json)
+        intoServer.enqueue(encoded)
+        if (null != json.id) {
+          // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+          const response = await fromServer.responses.get(json.id)!
+          this.client.receive(response as jsrpc.JSONRPCResponse)
+        }
+      })
+    )
+    this.#fromServer = fromServer
+  }
+
+  async start(): Promise<void> {
+    // process "window/logMessage": client <- server
+    this.addMethod(LSP.LogMessageNotification.type.method, (params) => {
+      const { type, message } = params as {
+        type: LSP.MessageType
+        message: string
+      }
+      let messageString = ''
+      switch (type) {
+        case LSP.MessageType.Error: {
+          messageString += '[error] '
+          break
+        }
+        case LSP.MessageType.Warning: {
+          messageString += ' [warn] '
+          break
+        }
+        case LSP.MessageType.Info: {
+          messageString += ' [info] '
+          break
+        }
+        case LSP.MessageType.Log: {
+          messageString += '  [log] '
+          break
+        }
+      }
+      messageString += message
+      // console.log(messageString)
+      return
+    })
+
+    // process "client/registerCapability": client <- server
+    this.addMethod(LSP.RegistrationRequest.type.method, (params) => {
+      // Register a server capability.
+      params.registrations.forEach(
+        (capabilityRegistration: LSP.Registration) => {
+          this.serverCapabilities = registerServerCapability(
+            this.serverCapabilities,
+            capabilityRegistration
+          )
+        }
+      )
+    })
+
+    // process "client/unregisterCapability": client <- server
+    this.addMethod(LSP.UnregistrationRequest.type.method, (params) => {
+      // Unregister a server capability.
+      params.unregisterations.forEach(
+        (capabilityUnregistration: LSP.Unregistration) => {
+          this.serverCapabilities = unregisterServerCapability(
+            this.serverCapabilities,
+            capabilityUnregistration
+          )
+        }
+      )
+    })
+
+    // request "initialize": client <-> server
+    const { capabilities } = await this.request(
+      LSP.InitializeRequest.type.method,
+      {
+        processId: null,
+        clientInfo: {
+          name: 'kcl-language-client',
+        },
+        capabilities: client_capabilities,
+        rootUri: null,
+      } as LSP.InitializeParams
+    )
+
+    this.serverCapabilities = capabilities
+
+    // notify "initialized": client --> server
+    this.notify(LSP.InitializedNotification.type.method, {})
+
+    await Promise.all(
+      this.afterInitializedHooks.map((f: () => Promise<void>) => f())
+    )
+    await Promise.all([this.processNotifications(), this.processRequests()])
+  }
+
+  getServerCapabilities(): LSP.ServerCapabilities<any> {
+    return this.serverCapabilities
+  }
+
+  async processNotifications(): Promise<void> {
+    for await (const notification of this.#fromServer.notifications) {
+      await this.receiveAndSend(notification)
+    }
+  }
+
+  async processRequests(): Promise<void> {
+    for await (const request of this.#fromServer.requests) {
+      await this.receiveAndSend(request)
+    }
+  }
+
+  pushAfterInitializeHook(...hooks: (() => Promise<void>)[]): void {
+    this.afterInitializedHooks.push(...hooks)
+  }
+}
--- a/src/editor/lsp/codec.ts
+++ b/src/editor/lsp/codec.ts
@ -0,0 +1,53 @@
+import * as jsrpc from 'json-rpc-2.0'
+import * as vsrpc from 'vscode-jsonrpc'
+
+import Bytes from './codec/bytes'
+import StreamDemuxer from './codec/demuxer'
+import Headers from './codec/headers'
+import Queue from './codec/queue'
+import Tracer from './tracer'
+
+export const encoder = new TextEncoder()
+export const decoder = new TextDecoder()
+
+export class Codec {
+  static encode(
+    json: jsrpc.JSONRPCRequest | jsrpc.JSONRPCResponse
+  ): Uint8Array {
+    const message = JSON.stringify(json)
+    const delimited = Headers.add(message)
+    return Bytes.encode(delimited)
+  }
+
+  static decode<T>(data: Uint8Array): T {
+    const delimited = Bytes.decode(data)
+    const message = Headers.remove(delimited)
+    return JSON.parse(message) as T
+  }
+}
+
+// FIXME: tracing effiency
+export class IntoServer
+  extends Queue<Uint8Array>
+  implements AsyncGenerator<Uint8Array, never, void>
+{
+  enqueue(item: Uint8Array): void {
+    Tracer.client(Headers.remove(decoder.decode(item)))
+    super.enqueue(item)
+  }
+}
+
+export interface FromServer extends WritableStream<Uint8Array> {
+  readonly responses: {
+    get(key: number | string): null | Promise<vsrpc.ResponseMessage>
+  }
+  readonly notifications: AsyncGenerator<vsrpc.NotificationMessage, never, void>
+  readonly requests: AsyncGenerator<vsrpc.RequestMessage, never, void>
+}
+
+// eslint-disable-next-line @typescript-eslint/no-namespace
+export namespace FromServer {
+  export function create(): FromServer {
+    return new StreamDemuxer()
+  }
+}
--- a/src/editor/lsp/codec/bytes.ts
+++ b/src/editor/lsp/codec/bytes.ts
@ -0,0 +1,27 @@
+import { encoder, decoder } from '../codec'
+
+export default class Bytes {
+  static encode(input: string): Uint8Array {
+    return encoder.encode(input)
+  }
+
+  static decode(input: Uint8Array): string {
+    return decoder.decode(input)
+  }
+
+  static append<
+    T extends { length: number; set(arr: T, offset: number): void }
+  >(constructor: { new (length: number): T }, ...arrays: T[]) {
+    let totalLength = 0
+    for (const arr of arrays) {
+      totalLength += arr.length
+    }
+    const result = new constructor(totalLength)
+    let offset = 0
+    for (const arr of arrays) {
+      result.set(arr, offset)
+      offset += arr.length
+    }
+    return result
+  }
+}
--- a/src/editor/lsp/codec/demuxer.ts
+++ b/src/editor/lsp/codec/demuxer.ts
@ -0,0 +1,82 @@
+import * as vsrpc from 'vscode-jsonrpc'
+
+import Bytes from './bytes'
+import PromiseMap from './map'
+import Queue from './queue'
+import Tracer from '../tracer'
+
+export default class StreamDemuxer extends Queue<Uint8Array> {
+  readonly responses: PromiseMap<number | string, vsrpc.ResponseMessage> =
+    new PromiseMap()
+  readonly notifications: Queue<vsrpc.NotificationMessage> =
+    new Queue<vsrpc.NotificationMessage>()
+  readonly requests: Queue<vsrpc.RequestMessage> =
+    new Queue<vsrpc.RequestMessage>()
+
+  readonly #start: Promise<void>
+
+  constructor() {
+    super()
+    this.#start = this.start()
+  }
+
+  private async start(): Promise<void> {
+    let contentLength: null | number = null
+    let buffer = new Uint8Array()
+
+    for await (const bytes of this) {
+      buffer = Bytes.append(Uint8Array, buffer, bytes)
+      while (buffer.length > 0) {
+        // check if the content length is known
+        if (null == contentLength) {
+          // if not, try to match the prefixed headers
+          const match = Bytes.decode(buffer).match(
+            /^Content-Length:\s*(\d+)\s*/
+          )
+          if (null == match) continue
+
+          // try to parse the content-length from the headers
+          const length = parseInt(match[1])
+          if (isNaN(length)) throw new Error('invalid content length')
+
+          // slice the headers since we now have the content length
+          buffer = buffer.slice(match[0].length)
+
+          // set the content length
+          contentLength = length
+        }
+
+        // if the buffer doesn't contain a full message; await another iteration
+        if (buffer.length < contentLength) continue
+
+        // Get just the slice of the buffer that is our content length.
+        const slice = buffer.slice(0, contentLength)
+
+        // decode buffer to a string
+        const delimited = Bytes.decode(slice)
+
+        // reset the buffer
+        buffer = buffer.slice(contentLength)
+        // reset the contentLength
+        contentLength = null
+
+        const message = JSON.parse(delimited) as vsrpc.Message
+        Tracer.server(message)
+
+        // demux the message stream
+        if (vsrpc.Message.isResponse(message) && null != message.id) {
+          this.responses.set(message.id, message)
+          continue
+        }
+        if (vsrpc.Message.isNotification(message)) {
+          this.notifications.enqueue(message)
+          continue
+        }
+        if (vsrpc.Message.isRequest(message)) {
+          this.requests.enqueue(message)
+          continue
+        }
+      }
+    }
+  }
+}
--- a/src/editor/lsp/codec/headers.ts
+++ b/src/editor/lsp/codec/headers.ts
@ -0,0 +1,9 @@
+export default class Headers {
+  static add(message: string): string {
+    return `Content-Length: ${message.length}\r\n\r\n${message}`
+  }
+
+  static remove(delimited: string): string {
+    return delimited.replace(/^Content-Length:\s*\d+\s*/, '')
+  }
+}
--- a/src/editor/lsp/codec/map.ts
+++ b/src/editor/lsp/codec/map.ts
@ -0,0 +1,72 @@
+export default class PromiseMap<K, V extends { toString(): string }> {
+  #map: Map<K, PromiseMap.Entry<V>> = new Map()
+
+  get(key: K & { toString(): string }): null | Promise<V> {
+    let initialized: PromiseMap.Entry<V>
+    // if the entry doesn't exist, set it
+    if (!this.#map.has(key)) {
+      initialized = this.#set(key)
+    } else {
+      // otherwise return the entry
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      initialized = this.#map.get(key)!
+    }
+    // if the entry is a pending promise, return it
+    if (initialized.status === 'pending') {
+      return initialized.promise
+    } else {
+      // otherwise return null
+      return null
+    }
+  }
+
+  #set(key: K, value?: V): PromiseMap.Entry<V> {
+    if (this.#map.has(key)) {
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      return this.#map.get(key)!
+    }
+    // placeholder resolver for entry
+    let resolve = (item: V) => {
+      void item
+    }
+    // promise for entry (which assigns the resolver
+    const promise = new Promise<V>((resolver) => {
+      resolve = resolver
+    })
+    // the initialized entry
+    const initialized: PromiseMap.Entry<V> = {
+      status: 'pending',
+      resolve,
+      promise,
+    }
+    if (null != value) {
+      initialized.resolve(value)
+    }
+    // set the entry
+    this.#map.set(key, initialized)
+    return initialized
+  }
+
+  set(key: K & { toString(): string }, value: V): this {
+    const initialized = this.#set(key, value)
+    // if the promise is pending ...
+    if (initialized.status === 'pending') {
+      // ... set the entry status to resolved to free the promise
+      this.#map.set(key, { status: 'resolved' })
+      // ... and resolve the promise with the given value
+      initialized.resolve(value)
+    }
+    return this
+  }
+
+  get size(): number {
+    return this.#map.size
+  }
+}
+
+// eslint-disable-next-line @typescript-eslint/no-namespace
+export namespace PromiseMap {
+  export type Entry<V> =
+    | { status: 'pending'; resolve: (item: V) => void; promise: Promise<V> }
+    | { status: 'resolved' }
+}
--- a/src/editor/lsp/codec/queue.ts
+++ b/src/editor/lsp/codec/queue.ts
@ -0,0 +1,113 @@
+export default class Queue<T>
+  implements WritableStream<T>, AsyncGenerator<T, never, void>
+{
+  readonly #promises: Promise<T>[] = []
+  readonly #resolvers: ((item: T) => void)[] = []
+  readonly #observers: ((item: T) => void)[] = []
+
+  #closed = false
+  #locked = false
+  readonly #stream: WritableStream<T>
+
+  static #__add<X>(
+    promises: Promise<X>[],
+    resolvers: ((item: X) => void)[]
+  ): void {
+    promises.push(
+      new Promise((resolve) => {
+        resolvers.push(resolve)
+      })
+    )
+  }
+
+  static #__enqueue<X>(
+    closed: boolean,
+    promises: Promise<X>[],
+    resolvers: ((item: X) => void)[],
+    item: X
+  ): void {
+    if (!closed) {
+      if (!resolvers.length) Queue.#__add(promises, resolvers)
+      const resolve = resolvers.shift()! // eslint-disable-line @typescript-eslint/no-non-null-assertion
+      resolve(item)
+    }
+  }
+
+  constructor() {
+    const closed = this.#closed
+    const promises = this.#promises
+    const resolvers = this.#resolvers
+    this.#stream = new WritableStream({
+      write(item: T): void {
+        Queue.#__enqueue(closed, promises, resolvers, item)
+      },
+    })
+  }
+
+  #add(): void {
+    return Queue.#__add(this.#promises, this.#resolvers)
+  }
+
+  enqueue(item: T): void {
+    return Queue.#__enqueue(this.#closed, this.#promises, this.#resolvers, item)
+  }
+
+  dequeue(): Promise<T> {
+    if (!this.#promises.length) this.#add()
+    const item = this.#promises.shift()! // eslint-disable-line @typescript-eslint/no-non-null-assertion
+    return item
+  }
+
+  isEmpty(): boolean {
+    return !this.#promises.length
+  }
+
+  isBlocked(): boolean {
+    return !!this.#resolvers.length
+  }
+
+  get length(): number {
+    return this.#promises.length - this.#resolvers.length
+  }
+
+  async next(): Promise<IteratorResult<T, never>> {
+    const done = false
+    const value = await this.dequeue()
+    for (const observer of this.#observers) {
+      observer(value)
+    }
+    return { done, value }
+  }
+
+  return(): Promise<IteratorResult<T, never>> {
+    return new Promise(() => {
+      // empty
+    })
+  }
+
+  throw(err: Error): Promise<IteratorResult<T, never>> {
+    return new Promise((_resolve, reject) => {
+      reject(err)
+    })
+  }
+
+  [Symbol.asyncIterator](): AsyncGenerator<T, never, void> {
+    return this
+  }
+
+  get locked(): boolean {
+    return this.#stream.locked
+  }
+
+  abort(reason?: Error): Promise<void> {
+    return this.#stream.abort(reason)
+  }
+
+  close(): Promise<void> {
+    return this.#stream.close()
+  }
+
+  getWriter(): WritableStreamDefaultWriter<T> {
+    return this.#stream.getWriter()
+  }
+}
--- a/src/editor/lsp/index.ts
+++ b/src/editor/lsp/index.ts
@ -0,0 +1,151 @@
+import type * as LSP from 'vscode-languageserver-protocol'
+import Client from './client'
+import { LanguageServerPlugin } from './plugin'
+import { SemanticToken, deserializeTokens } from './semantic_tokens'
+
+// https://microsoft.github.io/language-server-protocol/specifications/specification-current/
+
+// Client to server then server to client
+interface LSPRequestMap {
+  initialize: [LSP.InitializeParams, LSP.InitializeResult]
+  'textDocument/hover': [LSP.HoverParams, LSP.Hover]
+  'textDocument/completion': [
+    LSP.CompletionParams,
+    LSP.CompletionItem[] | LSP.CompletionList | null
+  ]
+  'textDocument/semanticTokens/full': [
+    LSP.SemanticTokensParams,
+    LSP.SemanticTokens
+  ]
+}
+
+// Client to server
+interface LSPNotifyMap {
+  initialized: LSP.InitializedParams
+  'textDocument/didChange': LSP.DidChangeTextDocumentParams
+  'textDocument/didOpen': LSP.DidOpenTextDocumentParams
+}
+
+// Server to client
+interface LSPEventMap {
+  'textDocument/publishDiagnostics': LSP.PublishDiagnosticsParams
+}
+
+export type Notification = {
+  [key in keyof LSPEventMap]: {
+    jsonrpc: '2.0'
+    id?: null | undefined
+    method: key
+    params: LSPEventMap[key]
+  }
+}[keyof LSPEventMap]
+
+export interface LanguageServerClientOptions {
+  client: Client
+}
+
+export class LanguageServerClient {
+  private client: Client
+
+  public ready: boolean
+
+  private plugins: LanguageServerPlugin[]
+
+  public initializePromise: Promise<void>
+
+  private isUpdatingSemanticTokens: boolean = false
+  private semanticTokens: SemanticToken[] = []
+
+  constructor(options: LanguageServerClientOptions) {
+    this.plugins = []
+    this.client = options.client
+
+    this.ready = false
+
+    this.initializePromise = this.initialize()
+  }
+
+  async initialize() {
+    // Start the client in the background.
+    this.client.start()
+
+    this.ready = true
+  }
+
+  getServerCapabilities(): LSP.ServerCapabilities<any> {
+    return this.client.getServerCapabilities()
+  }
+
+  close() {}
+
+  textDocumentDidOpen(params: LSP.DidOpenTextDocumentParams) {
+    this.notify('textDocument/didOpen', params)
+
+    this.updateSemanticTokens(params.textDocument.uri)
+  }
+
+  textDocumentDidChange(params: LSP.DidChangeTextDocumentParams) {
+    this.notify('textDocument/didChange', params)
+    this.updateSemanticTokens(params.textDocument.uri)
+  }
+
+  async updateSemanticTokens(uri: string) {
+    // Make sure we can only run, if we aren't already running.
+    if (!this.isUpdatingSemanticTokens) {
+      this.isUpdatingSemanticTokens = true
+
+      const result = await this.request('textDocument/semanticTokens/full', {
+        textDocument: {
+          uri,
+        },
+      })
+
+      this.semanticTokens = deserializeTokens(
+        result.data,
+        this.getServerCapabilities().semanticTokensProvider
+      )
+
+      this.isUpdatingSemanticTokens = false
+    }
+  }
+
+  getSemanticTokens(): SemanticToken[] {
+    return this.semanticTokens
+  }
+
+  async textDocumentHover(params: LSP.HoverParams) {
+    return await this.request('textDocument/hover', params)
+  }
+
+  async textDocumentCompletion(params: LSP.CompletionParams) {
+    return await this.request('textDocument/completion', params)
+  }
+
+  attachPlugin(plugin: LanguageServerPlugin) {
+    this.plugins.push(plugin)
+  }
+
+  detachPlugin(plugin: LanguageServerPlugin) {
+    const i = this.plugins.indexOf(plugin)
+    if (i === -1) return
+    this.plugins.splice(i, 1)
+  }
+
+  private request<K extends keyof LSPRequestMap>(
+    method: K,
+    params: LSPRequestMap[K][0]
+  ): Promise<LSPRequestMap[K][1]> {
+    return this.client.request(method, params) as Promise<LSPRequestMap[K][1]>
+  }
+
+  private notify<K extends keyof LSPNotifyMap>(
+    method: K,
+    params: LSPNotifyMap[K]
+  ): void {
+    return this.client.notify(method, params)
+  }
+
+  private processNotification(notification: Notification) {
+    for (const plugin of this.plugins) plugin.processNotification(notification)
+  }
+}
--- a/src/editor/lsp/language.ts
+++ b/src/editor/lsp/language.ts
@ -0,0 +1,36 @@
+// Code mirror language implementation for kcl.
+
+import {
+  Language,
+  defineLanguageFacet,
+  LanguageSupport,
+} from '@codemirror/language'
+import { LanguageServerClient } from '.'
+import { kclPlugin } from './plugin'
+import type * as LSP from 'vscode-languageserver-protocol'
+import { parser as jsParser } from '@lezer/javascript'
+
+const data = defineLanguageFacet({})
+
+export interface LanguageOptions {
+  workspaceFolders: LSP.WorkspaceFolder[] | null
+  documentUri: string
+  client: LanguageServerClient
+}
+
+export default function kclLanguage(options: LanguageOptions): LanguageSupport {
+  // For now let's use the javascript parser.
+  // It works really well and has good syntax highlighting.
+  // We can use our lsp for the rest.
+  const lang = new Language(data, jsParser, [], 'kcl')
+
+  // Create our supporting extension.
+  const kclLsp = kclPlugin({
+    documentUri: options.documentUri,
+    workspaceFolders: options.workspaceFolders,
+    allowHTMLContent: true,
+    client: options.client,
+  })
+
+  return new LanguageSupport(lang, [kclLsp])
+}
--- a/src/editor/lsp/parser.ts
+++ b/src/editor/lsp/parser.ts
@ -0,0 +1,168 @@
+// Extends the codemirror Parser for kcl.
+
+import {
+  Parser,
+  Input,
+  TreeFragment,
+  PartialParse,
+  Tree,
+  NodeType,
+  NodeSet,
+} from '@lezer/common'
+import { LanguageServerClient } from '.'
+import { posToOffset } from './plugin'
+import { SemanticToken } from './semantic_tokens'
+import { DocInput } from '@codemirror/language'
+import { tags, styleTags } from '@lezer/highlight'
+
+export default class KclParser extends Parser {
+  private client: LanguageServerClient
+
+  constructor(client: LanguageServerClient) {
+    super()
+    this.client = client
+  }
+
+  createParse(
+    input: Input,
+    fragments: readonly TreeFragment[],
+    ranges: readonly { from: number; to: number }[]
+  ): PartialParse {
+    let parse: PartialParse = new Context(this, input, fragments, ranges)
+    return parse
+  }
+
+  getTokenTypes(): string[] {
+    return this.client.getServerCapabilities().semanticTokensProvider!.legend
+      .tokenTypes
+  }
+
+  getSemanticTokens(): SemanticToken[] {
+    return this.client.getSemanticTokens()
+  }
+}
+
+class Context implements PartialParse {
+  private parser: KclParser
+  private input: DocInput
+  private fragments: readonly TreeFragment[]
+  private ranges: readonly { from: number; to: number }[]
+
+  private nodeTypes: { [key: string]: NodeType }
+  stoppedAt: number = 0
+
+  private semanticTokens: SemanticToken[] = []
+  private currentLine: number = 0
+  private currentColumn: number = 0
+  private nodeSet: NodeSet
+
+  constructor(
+    /// The parser configuration used.
+    parser: KclParser,
+    input: Input,
+    fragments: readonly TreeFragment[],
+    ranges: readonly { from: number; to: number }[]
+  ) {
+    this.parser = parser
+    this.input = input as DocInput
+    this.fragments = fragments
+    this.ranges = ranges
+
+    // Iterate over the semantic token types and create a node type for each.
+    this.nodeTypes = {}
+    let nodeArray: NodeType[] = []
+    this.parser.getTokenTypes().forEach((tokenType, index) => {
+      const nodeType = NodeType.define({
+        id: index,
+        name: tokenType,
+        // props: [this.styleTags],
+      })
+      this.nodeTypes[tokenType] = nodeType
+      nodeArray.push(nodeType)
+    })
+
+    this.semanticTokens = this.parser.getSemanticTokens()
+    const styles = styleTags({
+      number: tags.number,
+      variable: tags.variableName,
+      operator: tags.operator,
+      keyword: tags.keyword,
+      string: tags.string,
+      comment: tags.comment,
+      function: tags.function(tags.variableName),
+    })
+    this.nodeSet = new NodeSet(nodeArray).extend(styles)
+  }
+
+  get parsedPos(): number {
+    return 0
+  }
+
+  advance(): Tree | null {
+    if (this.semanticTokens.length === 0) {
+      return new Tree(NodeType.none, [], [], 0)
+    }
+    const tree = this.createTree(this.semanticTokens[0], 0)
+    this.stoppedAt = this.input.doc.length
+    return tree
+  }
+
+  createTree(token: SemanticToken, index: number): Tree {
+    const changedLine = token.delta_line !== 0
+    this.currentLine += token.delta_line
+    if (changedLine) {
+      this.currentColumn = 0
+    }
+    this.currentColumn += token.delta_start
+
+    // Let's get our position relative to the start of the file.
+    let currentPosition = posToOffset(this.input.doc, {
+      line: this.currentLine,
+      character: this.currentColumn,
+    })
+
+    const nodeType = this.nodeSet.types[this.nodeTypes[token.token_type].id]
+
+    if (currentPosition === undefined) {
+      // This is bad and weird.
+      return new Tree(nodeType, [], [], token.length)
+    }
+
+    if (index >= this.semanticTokens.length - 1) {
+      // We have no children.
+      return new Tree(nodeType, [], [], token.length)
+    }
+
+    const nextIndex = index + 1
+    const nextToken = this.semanticTokens[nextIndex]
+    const changedLineNext = nextToken.delta_line !== 0
+    const nextLine = this.currentLine + nextToken.delta_line
+    const nextColumn = changedLineNext
+      ? nextToken.delta_start
+      : this.currentColumn + nextToken.delta_start
+    const nextPosition = posToOffset(this.input.doc, {
+      line: nextLine,
+      character: nextColumn,
+    })
+
+    if (nextPosition === undefined) {
+      // This is bad and weird.
+      return new Tree(nodeType, [], [], token.length)
+    }
+
+    // Let's get the
+
+    return new Tree(
+      nodeType,
+      [this.createTree(nextToken, nextIndex)],
+
+      // The positions (offsets relative to the start of this tree) of the children.
+      [nextPosition - currentPosition],
+      token.length
+    )
+  }
+
+  stopAt(pos: number) {
+    this.stoppedAt = pos
+  }
+}
--- a/src/editor/lsp/plugin.ts
+++ b/src/editor/lsp/plugin.ts
@ -0,0 +1,354 @@
+import { autocompletion, completeFromList } from '@codemirror/autocomplete'
+import { setDiagnostics } from '@codemirror/lint'
+import { Facet } from '@codemirror/state'
+import {
+  EditorView,
+  ViewPlugin,
+  Tooltip,
+  hoverTooltip,
+  tooltips,
+} from '@codemirror/view'
+import {
+  DiagnosticSeverity,
+  CompletionItemKind,
+  CompletionTriggerKind,
+} from 'vscode-languageserver-protocol'
+
+import type {
+  Completion,
+  CompletionContext,
+  CompletionResult,
+} from '@codemirror/autocomplete'
+import type { PublishDiagnosticsParams } from 'vscode-languageserver-protocol'
+import type { ViewUpdate, PluginValue } from '@codemirror/view'
+import type { Text } from '@codemirror/state'
+import type * as LSP from 'vscode-languageserver-protocol'
+import { LanguageServerClient, Notification } from '.'
+import { Marked } from '@ts-stack/markdown'
+
+const changesDelay = 500
+
+const CompletionItemKindMap = Object.fromEntries(
+  Object.entries(CompletionItemKind).map(([key, value]) => [value, key])
+) as Record<CompletionItemKind, string>
+
+const useLast = (values: readonly any[]) => values.reduce((_, v) => v, '')
+const documentUri = Facet.define<string, string>({ combine: useLast })
+const languageId = Facet.define<string, string>({ combine: useLast })
+const client = Facet.define<LanguageServerClient, LanguageServerClient>({
+  combine: useLast,
+})
+
+export interface LanguageServerOptions {
+  workspaceFolders: LSP.WorkspaceFolder[] | null
+  documentUri: string
+  allowHTMLContent: boolean
+  client: LanguageServerClient
+}
+
+export class LanguageServerPlugin implements PluginValue {
+  public client: LanguageServerClient
+
+  private documentUri: string
+  private languageId: string
+  private documentVersion: number
+
+  private changesTimeout: number
+
+  constructor(private view: EditorView, private allowHTMLContent: boolean) {
+    this.client = this.view.state.facet(client)
+    this.documentUri = this.view.state.facet(documentUri)
+    this.languageId = this.view.state.facet(languageId)
+    this.documentVersion = 0
+    this.changesTimeout = 0
+
+    this.client.attachPlugin(this)
+
+    this.initialize({
+      documentText: this.view.state.doc.toString(),
+    })
+  }
+
+  update({ docChanged }: ViewUpdate) {
+    if (!docChanged) return
+    if (this.changesTimeout) clearTimeout(this.changesTimeout)
+    this.changesTimeout = window.setTimeout(() => {
+      this.sendChange({
+        documentText: this.view.state.doc.toString(),
+      })
+    }, changesDelay)
+  }
+
+  destroy() {
+    this.client.detachPlugin(this)
+  }
+
+  async initialize({ documentText }: { documentText: string }) {
+    if (this.client.initializePromise) {
+      await this.client.initializePromise
+    }
+    this.client.textDocumentDidOpen({
+      textDocument: {
+        uri: this.documentUri,
+        languageId: this.languageId,
+        text: documentText,
+        version: this.documentVersion,
+      },
+    })
+  }
+
+  async sendChange({ documentText }: { documentText: string }) {
+    if (!this.client.ready) return
+    try {
+      await this.client.textDocumentDidChange({
+        textDocument: {
+          uri: this.documentUri,
+          version: this.documentVersion++,
+        },
+        contentChanges: [{ text: documentText }],
+      })
+    } catch (e) {
+      console.error(e)
+    }
+  }
+
+  requestDiagnostics(view: EditorView) {
+    this.sendChange({ documentText: view.state.doc.toString() })
+  }
+
+  async requestHoverTooltip(
+    view: EditorView,
+    { line, character }: { line: number; character: number }
+  ): Promise<Tooltip | null> {
+    if (
+      !this.client.ready ||
+      !this.client.getServerCapabilities().hoverProvider
+    )
+      return null
+
+    this.sendChange({ documentText: view.state.doc.toString() })
+    const result = await this.client.textDocumentHover({
+      textDocument: { uri: this.documentUri },
+      position: { line, character },
+    })
+    if (!result) return null
+    const { contents, range } = result
+    let pos = posToOffset(view.state.doc, { line, character })!
+    let end: number | undefined
+    if (range) {
+      pos = posToOffset(view.state.doc, range.start)!
+      end = posToOffset(view.state.doc, range.end)
+    }
+    if (pos === null) return null
+    const dom = document.createElement('div')
+    dom.classList.add('documentation')
+    if (this.allowHTMLContent) dom.innerHTML = formatContents(contents)
+    else dom.textContent = formatContents(contents)
+    return { pos, end, create: (view) => ({ dom }), above: true }
+  }
+
+  async requestCompletion(
+    context: CompletionContext,
+    { line, character }: { line: number; character: number },
+    {
+      triggerKind,
+      triggerCharacter,
+    }: {
+      triggerKind: CompletionTriggerKind
+      triggerCharacter: string | undefined
+    }
+  ): Promise<CompletionResult | null> {
+    if (
+      !this.client.ready ||
+      !this.client.getServerCapabilities().completionProvider
+    )
+      return null
+
+    this.sendChange({
+      documentText: context.state.doc.toString(),
+    })
+
+    const result = await this.client.textDocumentCompletion({
+      textDocument: { uri: this.documentUri },
+      position: { line, character },
+      context: {
+        triggerKind,
+        triggerCharacter,
+      },
+    })
+
+    if (!result) return null
+
+    const items = 'items' in result ? result.items : result
+
+    let options = items.map(
+      ({
+        detail,
+        label,
+        labelDetails,
+        kind,
+        textEdit,
+        documentation,
+        deprecated,
+        insertText,
+        insertTextFormat,
+        sortText,
+        filterText,
+      }) => {
+        const completion: Completion & {
+          filterText: string
+          sortText?: string
+          apply: string
+        } = {
+          label,
+          detail: labelDetails ? labelDetails.detail : detail,
+          apply: label,
+          type: kind && CompletionItemKindMap[kind].toLowerCase(),
+          sortText: sortText ?? label,
+          filterText: filterText ?? label,
+        }
+        if (documentation) {
+          completion.info = formatContents(documentation)
+        }
+
+        return completion
+      }
+    )
+
+    return completeFromList(options)(context)
+  }
+
+  processNotification(notification: Notification) {
+    try {
+      switch (notification.method) {
+        case 'textDocument/publishDiagnostics':
+          this.processDiagnostics(notification.params)
+      }
+    } catch (error) {
+      console.error(error)
+    }
+  }
+
+  processDiagnostics(params: PublishDiagnosticsParams) {
+    if (params.uri !== this.documentUri) return
+
+    const diagnostics = params.diagnostics
+      .map(({ range, message, severity }) => ({
+        from: posToOffset(this.view.state.doc, range.start)!,
+        to: posToOffset(this.view.state.doc, range.end)!,
+        severity: (
+          {
+            [DiagnosticSeverity.Error]: 'error',
+            [DiagnosticSeverity.Warning]: 'warning',
+            [DiagnosticSeverity.Information]: 'info',
+            [DiagnosticSeverity.Hint]: 'info',
+          } as const
+        )[severity!],
+        message,
+      }))
+      .filter(
+        ({ from, to }) =>
+          from !== null && to !== null && from !== undefined && to !== undefined
+      )
+      .sort((a, b) => {
+        switch (true) {
+          case a.from < b.from:
+            return -1
+          case a.from > b.from:
+            return 1
+        }
+        return 0
+      })
+
+    this.view.dispatch(setDiagnostics(this.view.state, diagnostics))
+  }
+}
+
+export function kclPlugin(options: LanguageServerOptions) {
+  let plugin: LanguageServerPlugin | null = null
+
+  return [
+    client.of(options.client),
+    documentUri.of(options.documentUri),
+    languageId.of('kcl'),
+    ViewPlugin.define(
+      (view) =>
+        (plugin = new LanguageServerPlugin(view, options.allowHTMLContent))
+    ),
+    hoverTooltip(
+      (view, pos) =>
+        plugin?.requestHoverTooltip(view, offsetToPos(view.state.doc, pos)) ??
+        null
+    ),
+    tooltips({
+      position: 'absolute',
+    }),
+    autocompletion({
+      override: [
+        async (context) => {
+          if (plugin == null) return null
+
+          const { state, pos, explicit } = context
+          const line = state.doc.lineAt(pos)
+          let trigKind: CompletionTriggerKind = CompletionTriggerKind.Invoked
+          let trigChar: string | undefined
+          if (
+            !explicit &&
+            plugin.client
+              .getServerCapabilities()
+              .completionProvider?.triggerCharacters?.includes(
+                line.text[pos - line.from - 1]
+              )
+          ) {
+            trigKind = CompletionTriggerKind.TriggerCharacter
+            trigChar = line.text[pos - line.from - 1]
+          }
+          if (
+            trigKind === CompletionTriggerKind.Invoked &&
+            !context.matchBefore(/\w+$/)
+          ) {
+            return null
+          }
+          return await plugin.requestCompletion(
+            context,
+            offsetToPos(state.doc, pos),
+            {
+              triggerKind: trigKind,
+              triggerCharacter: trigChar,
+            }
+          )
+        },
+      ],
+    }),
+  ]
+}
+
+export function posToOffset(
+  doc: Text,
+  pos: { line: number; character: number }
+): number | undefined {
+  if (pos.line >= doc.lines) return
+  const offset = doc.line(pos.line + 1).from + pos.character
+  if (offset > doc.length) return
+  return offset
+}
+
+function offsetToPos(doc: Text, offset: number) {
+  const line = doc.lineAt(offset)
+  return {
+    line: line.number - 1,
+    character: offset - line.from,
+  }
+}
+
+function formatContents(
+  contents: LSP.MarkupContent | LSP.MarkedString | LSP.MarkedString[]
+): string {
+  if (Array.isArray(contents)) {
+    return contents.map((c) => formatContents(c) + '\n\n').join('')
+  } else if (typeof contents === 'string') {
+    return Marked.parse(contents)
+  } else {
+    return Marked.parse(contents.value)
+  }
+}
--- a/src/editor/lsp/semantic_tokens.ts
+++ b/src/editor/lsp/semantic_tokens.ts
@ -0,0 +1,51 @@
+import type * as LSP from 'vscode-languageserver-protocol'
+
+export class SemanticToken {
+  delta_line: number
+  delta_start: number
+  length: number
+  token_type: string
+  token_modifiers_bitset: string
+
+  constructor(
+    delta_line = 0,
+    delta_start = 0,
+    length = 0,
+    token_type = '',
+    token_modifiers_bitset = ''
+  ) {
+    this.delta_line = delta_line
+    this.delta_start = delta_start
+    this.length = length
+    this.token_type = token_type
+    this.token_modifiers_bitset = token_modifiers_bitset
+  }
+}
+
+export function deserializeTokens(
+  data: number[],
+  semanticTokensProvider?: LSP.SemanticTokensOptions
+): SemanticToken[] {
+  if (!semanticTokensProvider) {
+    return []
+  }
+  // Check if data length is divisible by 5
+  if (data.length % 5 !== 0) {
+    throw new Error('Length is not divisible by 5')
+  }
+
+  const tokens = []
+  for (let i = 0; i < data.length; i += 5) {
+    tokens.push(
+      new SemanticToken(
+        data[i],
+        data[i + 1],
+        data[i + 2],
+        semanticTokensProvider.legend.tokenTypes[data[i + 3]],
+        semanticTokensProvider.legend.tokenModifiers[data[i + 4]]
+      )
+    )
+  }
+
+  return tokens
+}
--- a/src/editor/lsp/server-capability-registration.ts
+++ b/src/editor/lsp/server-capability-registration.ts
@ -0,0 +1,80 @@
+import {
+  Registration,
+  ServerCapabilities,
+  Unregistration,
+} from 'vscode-languageserver-protocol'
+
+interface IFlexibleServerCapabilities extends ServerCapabilities {
+  [key: string]: any
+}
+
+interface IMethodServerCapabilityProviderDictionary {
+  [key: string]: string
+}
+
+const ServerCapabilitiesProviders: IMethodServerCapabilityProviderDictionary = {
+  'textDocument/hover': 'hoverProvider',
+  'textDocument/completion': 'completionProvider',
+  'textDocument/signatureHelp': 'signatureHelpProvider',
+  'textDocument/definition': 'definitionProvider',
+  'textDocument/typeDefinition': 'typeDefinitionProvider',
+  'textDocument/implementation': 'implementationProvider',
+  'textDocument/references': 'referencesProvider',
+  'textDocument/documentHighlight': 'documentHighlightProvider',
+  'textDocument/documentSymbol': 'documentSymbolProvider',
+  'textDocument/workspaceSymbol': 'workspaceSymbolProvider',
+  'textDocument/codeAction': 'codeActionProvider',
+  'textDocument/codeLens': 'codeLensProvider',
+  'textDocument/documentFormatting': 'documentFormattingProvider',
+  'textDocument/documentRangeFormatting': 'documentRangeFormattingProvider',
+  'textDocument/documentOnTypeFormatting': 'documentOnTypeFormattingProvider',
+  'textDocument/rename': 'renameProvider',
+  'textDocument/documentLink': 'documentLinkProvider',
+  'textDocument/color': 'colorProvider',
+  'textDocument/foldingRange': 'foldingRangeProvider',
+  'textDocument/declaration': 'declarationProvider',
+  'textDocument/executeCommand': 'executeCommandProvider',
+}
+
+function registerServerCapability(
+  serverCapabilities: ServerCapabilities,
+  registration: Registration
+): ServerCapabilities {
+  const serverCapabilitiesCopy = JSON.parse(
+    JSON.stringify(serverCapabilities)
+  ) as IFlexibleServerCapabilities
+  const { method, registerOptions } = registration
+  const providerName = ServerCapabilitiesProviders[method]
+
+  if (providerName) {
+    if (!registerOptions) {
+      serverCapabilitiesCopy[providerName] = true
+    } else {
+      serverCapabilitiesCopy[providerName] = Object.assign(
+        {},
+        JSON.parse(JSON.stringify(registerOptions))
+      )
+    }
+  } else {
+    throw new Error('Could not register server capability.')
+  }
+
+  return serverCapabilitiesCopy
+}
+
+function unregisterServerCapability(
+  serverCapabilities: ServerCapabilities,
+  unregistration: Unregistration
+): ServerCapabilities {
+  const serverCapabilitiesCopy = JSON.parse(
+    JSON.stringify(serverCapabilities)
+  ) as IFlexibleServerCapabilities
+  const { method } = unregistration
+  const providerName = ServerCapabilitiesProviders[method]
+
+  delete serverCapabilitiesCopy[providerName]
+
+  return serverCapabilitiesCopy
+}
+
+export { registerServerCapability, unregisterServerCapability }
--- a/src/editor/lsp/server.ts
+++ b/src/editor/lsp/server.ts
@ -0,0 +1,42 @@
+import init, {
+  InitOutput,
+  lsp_run,
+  ServerConfig,
+} from '../../wasm-lib/pkg/wasm_lib'
+import { FromServer, IntoServer } from './codec'
+
+let server: null | Server
+
+export default class Server {
+  readonly initOutput: InitOutput
+  readonly #intoServer: IntoServer
+  readonly #fromServer: FromServer
+
+  private constructor(
+    initOutput: InitOutput,
+    intoServer: IntoServer,
+    fromServer: FromServer
+  ) {
+    this.initOutput = initOutput
+    this.#intoServer = intoServer
+    this.#fromServer = fromServer
+  }
+
+  static async initialize(
+    intoServer: IntoServer,
+    fromServer: FromServer
+  ): Promise<Server> {
+    if (null == server) {
+      const initOutput = await init()
+      server = new Server(initOutput, intoServer, fromServer)
+    } else {
+      console.warn('Server already initialized; ignoring')
+    }
+    return server
+  }
+
+  async start(): Promise<void> {
+    const config = new ServerConfig(this.#intoServer, this.#fromServer)
+    await lsp_run(config)
+  }
+}
--- a/src/editor/lsp/tracer.ts
+++ b/src/editor/lsp/tracer.ts
@ -0,0 +1,21 @@
+import { Message } from 'vscode-languageserver-protocol'
+
+const env = import.meta.env.MODE
+
+export default class Tracer {
+  static client(message: string): void {
+    // These are really noisy, so we have a special env var for them.
+    if (env === 'lsp_tracing') {
+      console.log('lsp client message', message)
+    }
+  }
+
+  static server(input: string | Message): void {
+    // These are really noisy, so we have a special env var for them.
+    if (env === 'lsp_tracing') {
+      const message: string =
+        typeof input === 'string' ? input : JSON.stringify(input)
+      console.log('lsp server message', message)
+    }
+  }
+}
--- a/src/env.ts
+++ b/src/env.ts
@ -8,4 +8,9 @@ export const VITE_KC_API_WS_MODELING_URL = import.meta.env
  .VITE_KC_API_WS_MODELING_URL
 export const VITE_KC_API_BASE_URL = import.meta.env.VITE_KC_API_BASE_URL
 export const VITE_KC_SITE_BASE_URL = import.meta.env.VITE_KC_SITE_BASE_URL
+export const VITE_KC_CONNECTION_WEBRTC_REPORT_STATS_MS = import.meta.env
+  .VITE_KC_CONNECTION_WEBRTC_REPORT_STATS_MS
+export const VITE_KC_CONNECTION_TIMEOUT_MS = import.meta.env
+  .VITE_KC_CONNECTION_TIMEOUT_MS
+export const VITE_KC_SENTRY_DSN = import.meta.env.VITE_KC_SENTRY_DSN
 export const TEST = import.meta.env.TEST
--- a/src/hooks/useAuthMachine.tsx
+++ b/src/hooks/useAuthMachine.tsx
@ -1,54 +0,0 @@
-import { createActorContext } from '@xstate/react'
-import { useNavigate } from 'react-router-dom'
-import { paths } from '../Router'
-import { authMachine, TOKEN_PERSIST_KEY } from '../lib/authMachine'
-import withBaseUrl from '../lib/withBaseURL'
-
-export const AuthMachineContext = createActorContext(authMachine)
-
-export const GlobalStateProvider = ({
-  children,
-}: {
-  children: React.ReactNode
-}) => {
-  const navigate = useNavigate()
-  return (
-    <AuthMachineContext.Provider
-      machine={() =>
-        authMachine.withConfig({
-          actions: {
-            goToSignInPage: () => {
-              navigate(paths.SIGN_IN)
-              logout()
-            },
-            goToIndexPage: () => navigate(paths.INDEX),
-          },
-        })
-      }
-    >
-      {children}
-    </AuthMachineContext.Provider>
-  )
-}
-
-export function useAuthMachine<T>(
-  selector: (
-    state: Parameters<Parameters<typeof AuthMachineContext.useSelector>[0]>[0]
-  ) => T = () => null as T
-): [T, ReturnType<typeof AuthMachineContext.useActor>[1]] {
-  // useActor api normally `[state, send] = useActor`
-  // we're only interested in send because of the selector
-  const send = AuthMachineContext.useActor()[1]
-
-  const selection = AuthMachineContext.useSelector(selector)
-  return [selection, send]
-}
-
-export function logout() {
-  const url = withBaseUrl('/logout')
-  localStorage.removeItem(TOKEN_PERSIST_KEY)
-  return fetch(url, {
-    method: 'POST',
-    credentials: 'include',
-  })
-}
--- a/src/hooks/useCommandsContext.ts
+++ b/src/hooks/useCommandsContext.ts
@ -0,0 +1,6 @@
+import { CommandsContext } from 'components/CommandBar'
+import { useContext } from 'react'
+
+export const useCommandsContext = () => {
+  return useContext(CommandsContext)
+}
--- a/src/hooks/useGlobalStateContext.ts
+++ b/src/hooks/useGlobalStateContext.ts
@ -0,0 +1,6 @@
+import { GlobalStateContext } from 'components/GlobalStateProvider'
+import { useContext } from 'react'
+
+export const useGlobalStateContext = () => {
+  return useContext(GlobalStateContext)
+}
--- a/src/hooks/useStateMachineCommands.ts
+++ b/src/hooks/useStateMachineCommands.ts
@ -0,0 +1,42 @@
+import { useEffect } from 'react'
+import { AnyStateMachine, StateFrom } from 'xstate'
+import { Command, CommandBarMeta, createMachineCommand } from '../lib/commands'
+import { useCommandsContext } from './useCommandsContext'
+
+interface UseStateMachineCommandsArgs<T extends AnyStateMachine> {
+  state: StateFrom<T>
+  send: Function
+  commandBarMeta?: CommandBarMeta
+  commands: Command[]
+  owner: string
+}
+
+export default function useStateMachineCommands<T extends AnyStateMachine>({
+  state,
+  send,
+  commandBarMeta,
+  owner,
+}: UseStateMachineCommandsArgs<T>) {
+  const { addCommands, removeCommands } = useCommandsContext()
+
+  useEffect(() => {
+    const newCommands = state.nextEvents
+      .filter((e) => !['done.', 'error.'].some((n) => e.includes(n)))
+      .map((type) =>
+        createMachineCommand<T>({
+          type,
+          state,
+          send,
+          commandBarMeta,
+          owner,
+        })
+      )
+      .filter((c) => c !== null) as Command[]
+
+    addCommands(newCommands)
+
+    return () => {
+      removeCommands(newCommands)
+    }
+  }, [state])
+}
--- a/src/hooks/useTauriBoot.ts
+++ b/src/hooks/useTauriBoot.ts
@ -1,67 +0,0 @@
-import { useEffect } from 'react'
-import { useStore } from '../useStore'
-import { parse } from 'toml'
-import {
-  createDir,
-  BaseDirectory,
-  readDir,
-  readTextFile,
-} from '@tauri-apps/api/fs'
-
-export const useTauriBoot = () => {
-  const { defaultDir, setDefaultDir, setHomeMenuItems } = useStore((s) => ({
-    defaultDir: s.defaultDir,
-    setDefaultDir: s.setDefaultDir,
-    setHomeMenuItems: s.setHomeMenuItems,
-  }))
-  useEffect(() => {
-    const isTauri = (window as any).__TAURI__
-    if (!isTauri) return
-    const run = async () => {
-      if (!defaultDir.base) {
-        createDir('puffin-projects/example', {
-          dir: BaseDirectory.Home,
-          recursive: true,
-        })
-        setDefaultDir({
-          base: BaseDirectory.Home,
-          dir: 'puffin-projects',
-        })
-      } else {
-        const directoryResult = await readDir(defaultDir.dir, {
-          dir: defaultDir.base,
-          recursive: true,
-        })
-        const puffinProjects = directoryResult.filter(
-          (file) =>
-            !file?.name?.startsWith('.') &&
-            file?.children?.find((child) => child?.name === 'wax.toml')
-        )
-
-        const tomlFiles = await Promise.all(
-          puffinProjects.map(async (file) => {
-            const parsedToml = parse(
-              await readTextFile(`${file.path}/wax.toml`, {
-                dir: defaultDir.base,
-              })
-            )
-            const mainPath = parsedToml?.package?.main
-            const projectName = parsedToml?.package?.name
-            return {
-              file,
-              mainPath,
-              projectName,
-            }
-          })
-        )
-        setHomeMenuItems(
-          tomlFiles.map(({ file, mainPath, projectName }) => ({
-            name: projectName,
-            path: mainPath ? `${file.path}/${mainPath}` : file.path,
-          }))
-        )
-      }
-    }
-    run()
-  }, [])
-}
--- a/src/index.css
+++ b/src/index.css
@ -86,8 +86,21 @@ code {
  @apply bg-transparent;
 }

+#code-mirror-override .cm-scroller {
+}
+
+#code-mirror-override .cm-activeLine,
+#code-mirror-override .cm-activeLineGutter {
+  @apply bg-liquid-10/50;
+}
+
+.dark #code-mirror-override .cm-activeLine,
+.dark #code-mirror-override .cm-activeLineGutter {
+  @apply bg-liquid-80/50;
+}
+
 #code-mirror-override .cm-gutters {
-  @apply bg-chalkboard-10/50;
+  @apply bg-chalkboard-10/30;
 }

 .dark #code-mirror-override .cm-gutters {
@ -99,16 +112,43 @@ code {
 }
 #code-mirror-override .cm-cursor {
  display: block;
-  width: 200px;
-  background: linear-gradient(
-    to right,
-    rgb(0, 55, 94) 0%,
-    #0084e2ff 2%,
-    #0084e255 5%,
-    transparent 100%
-  );
+  width: 1ch;
+  @apply bg-liquid-40 mix-blend-multiply;
+
+  animation: blink 2s ease-out infinite;
+}
+
+.dark #code-mirror-override .cm-cursor {
+  @apply bg-liquid-50;
+}
+
+@keyframes blink {
+  0%,
+  100% {
+    opacity: 0;
+  }
+  15% {
+    opacity: 0.75;
+  }
 }

 .react-json-view {
  @apply bg-transparent !important;
 }
+
+#code-mirror-override .cm-tooltip {
+  font-size: 80%;
+}
+
+#code-mirror-override .cm-tooltip-hover {
+}
+
+#code-mirror-override .cm-tooltip-hover .documentation {
+  padding: 5;
+}
+
+#code-mirror-override .cm-content {
+  white-space: pre-wrap;
+  word-break: normal;
+  word-wrap: break-word;
+}
--- a/src/index.tsx
+++ b/src/index.tsx
@ -2,23 +2,10 @@ import ReactDOM from 'react-dom/client'
 import './index.css'
 import reportWebVitals from './reportWebVitals'
 import { Toaster } from 'react-hot-toast'
-import { Themes, useStore } from './useStore'
 import { Router } from './Router'
 import { HotkeysProvider } from 'react-hotkeys-hook'
-import { getSystemTheme } from './lib/getSystemTheme'

 const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement)
-function setThemeClass(state: Partial<{ theme: Themes }>) {
-  const systemTheme = state.theme === Themes.System && getSystemTheme()
-  if (state.theme === Themes.Dark || systemTheme === Themes.Dark) {
-    document.body.classList.add('dark')
-  } else {
-    document.body.classList.remove('dark')
-  }
-}
-const { theme } = useStore.getState()
-setThemeClass({ theme })
-useStore.subscribe(setThemeClass)

 root.render(
  <HotkeysProvider>
--- a/src/lang/abstractSyntaxTree.test.ts
+++ b/src/lang/abstractSyntaxTree.test.ts
@ -1,4 +1,5 @@
 import { parser_wasm } from './abstractSyntaxTree'
+import { KCLUnexpectedError } from './errors'
 import { initPromise } from './rust'

 beforeAll(() => initPromise)
@ -178,6 +179,9 @@ const newVar = myVar + 1
              name: 'aIdentifier',
            },
          ],
+          function: {
+            type: 'InMemory',
+          },
          optional: false,
        },
      },
@ -210,10 +214,8 @@ describe('testing function declaration', () => {
              type: 'FunctionExpression',
              start: 11,
              end: 19,
-              id: null,
              params: [],
              body: {
-                type: 'BlockStatement',
                start: 17,
                end: 19,
                body: [],
@ -250,7 +252,6 @@ describe('testing function declaration', () => {
              type: 'FunctionExpression',
              start: 11,
              end: 39,
-              id: null,
              params: [
                {
                  type: 'Identifier',
@ -266,7 +267,6 @@ describe('testing function declaration', () => {
                },
              ],
              body: {
-                type: 'BlockStatement',
                start: 21,
                end: 39,
                body: [
@ -327,7 +327,6 @@ const myVar = funcN(1, 2)`
              type: 'FunctionExpression',
              start: 11,
              end: 37,
-              id: null,
              params: [
                {
                  type: 'Identifier',
@ -343,7 +342,6 @@ const myVar = funcN(1, 2)`
                },
              ],
              body: {
-                type: 'BlockStatement',
                start: 21,
                end: 37,
                body: [
@ -418,6 +416,9 @@ const myVar = funcN(1, 2)`
                  raw: '2',
                },
              ],
+              function: {
+                type: 'InMemory',
+              },
              optional: false,
            },
          },
@ -487,6 +488,7 @@ describe('testing pipe operator special', () => {
                      ],
                    },
                  ],
+                  function: expect.any(Object),
                  optional: false,
                },
                {
@ -523,6 +525,7 @@ describe('testing pipe operator special', () => {
                    },
                    { type: 'PipeSubstitution', start: 59, end: 60 },
                  ],
+                  function: expect.any(Object),
                  optional: false,
                },
                {
@ -595,6 +598,7 @@ describe('testing pipe operator special', () => {
                    },
                    { type: 'PipeSubstitution', start: 105, end: 106 },
                  ],
+                  function: expect.any(Object),
                  optional: false,
                },
                {
@ -631,6 +635,7 @@ describe('testing pipe operator special', () => {
                    },
                    { type: 'PipeSubstitution', start: 128, end: 129 },
                  ],
+                  function: expect.any(Object),
                  optional: false,
                },
                {
@ -653,6 +658,9 @@ describe('testing pipe operator special', () => {
                    },
                    { type: 'PipeSubstitution', start: 143, end: 144 },
                  ],
+                  function: {
+                    type: 'InMemory',
+                  },
                  optional: false,
                },
              ],
@ -732,6 +740,9 @@ describe('testing pipe operator special', () => {
                      end: 35,
                    },
                  ],
+                  function: {
+                    type: 'InMemory',
+                  },
                  optional: false,
                },
              ],
@ -1552,7 +1563,10 @@ const key = 'c'`
      type: 'NoneCodeNode',
      start: code.indexOf('\n// this is a comment'),
      end: code.indexOf('const key'),
-      value: '\n// this is a comment\n',
+      value: {
+        type: 'block',
+        value: 'this is a comment',
+      },
    }
    const { nonCodeMeta } = parser_wasm(code)
    expect(nonCodeMeta.noneCodeNodes[0]).toEqual(nonCodeMetaInstance)
@ -1562,7 +1576,9 @@ const key = 'c'`
    const { nonCodeMeta: nonCodeMeta2 } = parser_wasm(
      codeWithExtraStartWhitespace
    )
-    expect(nonCodeMeta2.noneCodeNodes[0].value).toBe(nonCodeMetaInstance.value)
+    expect(nonCodeMeta2.noneCodeNodes[0].value).toStrictEqual(
+      nonCodeMetaInstance.value
+    )
    expect(nonCodeMeta2.noneCodeNodes[0].start).not.toBe(
      nonCodeMetaInstance.start
    )
@ -1570,8 +1586,8 @@ const key = 'c'`
  it('comments nested within a block statement', () => {
    const code = `const mySketch = startSketchAt([0,0])
  |> lineTo({ to: [0, 1], tag: 'myPath' }, %)
-  |> lineTo([1, 1], %) /* this is 
-      a comment 
+  |> lineTo([1, 1], %) /* this is
+      a comment
      spanning a few lines */
  |> lineTo({ to: [1,0], tag: "rightPath" }, %)
  |> close(%)
@ -1584,9 +1600,11 @@ const key = 'c'`
    expect(sketchNonCodeMeta[indexOfSecondLineToExpression]).toEqual({
      type: 'NoneCodeNode',
      start: 106,
-      end: 168,
-      value:
-        ' /* this is \n      a comment \n      spanning a few lines */\n  ',
+      end: 166,
+      value: {
+        type: 'block',
+        value: 'this is\n      a comment\n      spanning a few lines',
+      },
    })
  })
  it('comments in a pipe expression', () => {
@ -1606,7 +1624,10 @@ const key = 'c'`
      type: 'NoneCodeNode',
      start: 125,
      end: 141,
-      value: '\n// a comment\n  ',
+      value: {
+        type: 'block',
+        value: 'a comment',
+      },
    })
  })
 })
@ -1630,6 +1651,7 @@ describe('test UnaryExpression', () => {
          { type: 'Literal', start: 19, end: 20, value: 4, raw: '4' },
          { type: 'Literal', start: 22, end: 25, value: 100, raw: '100' },
        ],
+        function: expect.any(Object),
        optional: false,
      },
    })
@ -1663,10 +1685,12 @@ describe('testing nested call expressions', () => {
              { type: 'Literal', start: 34, end: 35, value: 5, raw: '5' },
              { type: 'Literal', start: 37, end: 38, value: 3, raw: '3' },
            ],
+            function: expect.any(Object),
            optional: false,
          },
        },
      ],
+      function: expect.any(Object),
      optional: false,
    })
  })
@ -1698,6 +1722,7 @@ describe('should recognise callExpresions in binaryExpressions', () => {
            },
            { type: 'PipeSubstitution', start: 25, end: 26 },
          ],
+          function: expect.any(Object),
          optional: false,
        },
        right: { type: 'Literal', value: 1, raw: '1', start: 30, end: 31 },
@ -1706,3 +1731,19 @@ describe('should recognise callExpresions in binaryExpressions', () => {
    ])
  })
 })
+
+describe('parsing errors', () => {
+  it('should return an error when there is a unexpected closed curly brace', async () => {
+    const code = `const myVar = startSketchAt([}], %)`
+
+    let _theError
+    try {
+      const result = expect(parser_wasm(code))
+      console.log('result', result)
+    } catch (e) {
+      _theError = e
+    }
+    const theError = _theError as any
+    expect(theError).toEqual(new KCLUnexpectedError('Brace', [[29, 30]]))
+  })
+})
--- a/src/lang/abstractSyntaxTree.ts
+++ b/src/lang/abstractSyntaxTree.ts
@ -3,21 +3,21 @@ import { parse_js } from '../wasm-lib/pkg/wasm_lib'
 import { initPromise } from './rust'
 import { Token } from './tokeniser'
 import { KCLError } from './errors'
+import { KclError as RustKclError } from '../wasm-lib/kcl/bindings/KclError'
+
+export const rangeTypeFix = (ranges: number[][]): [number, number][] =>
+  ranges.map(([start, end]) => [start, end])

 export const parser_wasm = (code: string): Program => {
  try {
    const program: Program = parse_js(code)
    return program
  } catch (e: any) {
-    const parsed: {
-      kind: string
-      msg: string
-      sourceRanges: [number, number][]
-    } = JSON.parse(e.toString())
-    const kclError: KCLError = new KCLError(
+    const parsed: RustKclError = JSON.parse(e.toString())
+    const kclError = new KCLError(
      parsed.kind,
      parsed.msg,
-      parsed.sourceRanges
+      rangeTypeFix(parsed.sourceRanges)
    )

    console.log(kclError)
@ -31,15 +31,11 @@ export async function asyncParser(code: string): Promise<Program> {
    const program: Program = parse_js(code)
    return program
  } catch (e: any) {
-    const parsed: {
-      kind: string
-      msg: string
-      sourceRanges: [number, number][]
-    } = JSON.parse(e.toString())
-    const kclError: KCLError = new KCLError(
+    const parsed: RustKclError = JSON.parse(e.toString())
+    const kclError = new KCLError(
      parsed.kind,
      parsed.msg,
-      parsed.sourceRanges
+      rangeTypeFix(parsed.sourceRanges)
    )

    console.log(kclError)
--- a/src/lang/abstractSyntaxTreeTypes.ts
+++ b/src/lang/abstractSyntaxTreeTypes.ts
@ -1,20 +1,20 @@
-export type { Program } from '../wasm-lib/bindings/Program'
-export type { Value } from '../wasm-lib/bindings/Value'
-export type { ObjectExpression } from '../wasm-lib/bindings/ObjectExpression'
-export type { MemberExpression } from '../wasm-lib/bindings/MemberExpression'
-export type { PipeExpression } from '../wasm-lib/bindings/PipeExpression'
-export type { VariableDeclaration } from '../wasm-lib/bindings/VariableDeclaration'
-export type { PipeSubstitution } from '../wasm-lib/bindings/PipeSubstitution'
-export type { Identifier } from '../wasm-lib/bindings/Identifier'
-export type { UnaryExpression } from '../wasm-lib/bindings/UnaryExpression'
-export type { BinaryExpression } from '../wasm-lib/bindings/BinaryExpression'
-export type { ReturnStatement } from '../wasm-lib/bindings/ReturnStatement'
-export type { ExpressionStatement } from '../wasm-lib/bindings/ExpressionStatement'
-export type { CallExpression } from '../wasm-lib/bindings/CallExpression'
-export type { VariableDeclarator } from '../wasm-lib/bindings/VariableDeclarator'
-export type { BinaryPart } from '../wasm-lib/bindings/BinaryPart'
-export type { Literal } from '../wasm-lib/bindings/Literal'
-export type { ArrayExpression } from '../wasm-lib/bindings/ArrayExpression'
+export type { Program } from '../wasm-lib/kcl/bindings/Program'
+export type { Value } from '../wasm-lib/kcl/bindings/Value'
+export type { ObjectExpression } from '../wasm-lib/kcl/bindings/ObjectExpression'
+export type { MemberExpression } from '../wasm-lib/kcl/bindings/MemberExpression'
+export type { PipeExpression } from '../wasm-lib/kcl/bindings/PipeExpression'
+export type { VariableDeclaration } from '../wasm-lib/kcl/bindings/VariableDeclaration'
+export type { PipeSubstitution } from '../wasm-lib/kcl/bindings/PipeSubstitution'
+export type { Identifier } from '../wasm-lib/kcl/bindings/Identifier'
+export type { UnaryExpression } from '../wasm-lib/kcl/bindings/UnaryExpression'
+export type { BinaryExpression } from '../wasm-lib/kcl/bindings/BinaryExpression'
+export type { ReturnStatement } from '../wasm-lib/kcl/bindings/ReturnStatement'
+export type { ExpressionStatement } from '../wasm-lib/kcl/bindings/ExpressionStatement'
+export type { CallExpression } from '../wasm-lib/kcl/bindings/CallExpression'
+export type { VariableDeclarator } from '../wasm-lib/kcl/bindings/VariableDeclarator'
+export type { BinaryPart } from '../wasm-lib/kcl/bindings/BinaryPart'
+export type { Literal } from '../wasm-lib/kcl/bindings/Literal'
+export type { ArrayExpression } from '../wasm-lib/kcl/bindings/ArrayExpression'

 export type SyntaxType =
  | 'Program'
@ -22,7 +22,6 @@ export type SyntaxType =
  | 'BinaryExpression'
  | 'CallExpression'
  | 'Identifier'
-  | 'BlockStatement'
  | 'ReturnStatement'
  | 'VariableDeclaration'
  | 'VariableDeclarator'
--- a/src/lang/artifact.test.ts
+++ b/src/lang/artifact.test.ts
@ -11,51 +11,52 @@ describe('testing artifacts', () => {
 const mySketch001 = startSketchAt([0, 0])
  |> lineTo([-1.59, -1.54], %)
  |> lineTo([0.46, -5.82], %)
-  // |> rx(45, %) 
+  // |> rx(45, %)
 show(mySketch001)`
    const programMemory = await enginelessExecutor(parser_wasm(code))
+    // @ts-ignore
    const shown = programMemory?.return?.map(
+      // @ts-ignore
      (a) => programMemory?.root?.[a.name]
    )
    expect(shown).toEqual([
      {
        type: 'sketchGroup',
        start: {
-          type: 'base',
          to: [0, 0],
          from: [0, 0],
+          name: '',
          __geoMeta: {
-            id: '66366561-6465-4734-a463-366330356563',
+            id: expect.any(String),
            sourceRange: [21, 42],
-            pathToNode: [],
          },
        },
        value: [
          {
            type: 'toPoint',
+            name: '',
            to: [-1.59, -1.54],
            from: [0, 0],
            __geoMeta: {
              sourceRange: [48, 73],
-              id: '30366338-6462-4330-a364-303935626163',
-              pathToNode: [],
+              id: expect.any(String),
            },
          },
          {
            type: 'toPoint',
            to: [0.46, -5.82],
            from: [-1.59, -1.54],
+            name: '',
            __geoMeta: {
              sourceRange: [79, 103],
-              id: '32653334-6331-4231-b162-663334363535',
-              pathToNode: [],
+              id: expect.any(String),
            },
          },
        ],
        position: [0, 0, 0],
        rotation: [0, 0, 0, 1],
-        id: '39643164-6130-4734-b432-623638393262',
-        __meta: [{ sourceRange: [21, 42], pathToNode: [] }],
+        id: expect.any(String),
+        __meta: [{ sourceRange: [21, 42] }],
      },
    ])
  })
@ -69,21 +70,20 @@ const mySketch001 = startSketchAt([0, 0])
  |> extrude(2, %)
 show(mySketch001)`
    const programMemory = await enginelessExecutor(parser_wasm(code))
+    // @ts-ignore
    const shown = programMemory?.return?.map(
+      // @ts-ignore
      (a) => programMemory?.root?.[a.name]
    )
    expect(shown).toEqual([
      {
        type: 'extrudeGroup',
-        id: '65383433-3839-4333-b836-343263636638',
+        id: expect.any(String),
        value: [],
        height: 2,
        position: [0, 0, 0],
        rotation: [0, 0, 0, 1],
-        __meta: [
-          { sourceRange: [127, 140], pathToNode: [] },
-          { sourceRange: [21, 42], pathToNode: [] },
-        ],
+        __meta: [{ sourceRange: [21, 42] }],
      },
    ])
  })
@ -106,37 +106,33 @@ const sk2 = startSketchAt([0, 0])
  |> lineTo([2.5, 0], %)
  // |> transform(theTransf, %)
  |> extrude(2, %)
-  
+

 show(theExtrude, sk2)`
    const programMemory = await enginelessExecutor(parser_wasm(code))
+    // @ts-ignore
    const geos = programMemory?.return?.map(
+      // @ts-ignore
      ({ name }) => programMemory?.root?.[name]
    )
    expect(geos).toEqual([
      {
        type: 'extrudeGroup',
-        id: '63333330-3631-4230-b664-623132643731',
+        id: expect.any(String),
        value: [],
        height: 2,
        position: [0, 0, 0],
        rotation: [0, 0, 0, 1],
-        __meta: [
-          { sourceRange: [212, 227], pathToNode: [] },
-          { sourceRange: [13, 34], pathToNode: [] },
-        ],
+        __meta: [{ sourceRange: [13, 34] }],
      },
      {
        type: 'extrudeGroup',
-        id: '33316639-3438-4661-a334-663262383737',
+        id: expect.any(String),
        value: [],
        height: 2,
        position: [0, 0, 0],
        rotation: [0, 0, 0, 1],
-        __meta: [
-          { sourceRange: [453, 466], pathToNode: [] },
-          { sourceRange: [302, 323], pathToNode: [] },
-        ],
+        __meta: [{ sourceRange: [302, 323] }],
      },
    ])
  })
--- a/src/lang/errors.ts
+++ b/src/lang/errors.ts
@ -1,11 +1,13 @@
 import { Diagnostic } from '@codemirror/lint'
+import { KclError as RustKclError } from '../wasm-lib/kcl/bindings/KclError'

+type ExtractKind<T> = T extends { kind: infer K } ? K : never
 export class KCLError {
-  kind: string | undefined
+  kind: ExtractKind<RustKclError> | 'name'
  sourceRanges: [number, number][]
  msg: string
  constructor(
-    kind: string | undefined,
+    kind: ExtractKind<RustKclError> | 'name',
    msg: string,
    sourceRanges: [number, number][]
  ) {
@ -39,11 +41,18 @@ export class KCLTypeError extends KCLError {

 export class KCLUnimplementedError extends KCLError {
  constructor(msg: string, sourceRanges: [number, number][]) {
-    super('unimplemented feature', msg, sourceRanges)
+    super('unimplemented', msg, sourceRanges)
    Object.setPrototypeOf(this, KCLUnimplementedError.prototype)
  }
 }

+export class KCLUnexpectedError extends KCLError {
+  constructor(msg: string, sourceRanges: [number, number][]) {
+    super('unexpected', msg, sourceRanges)
+    Object.setPrototypeOf(this, KCLUnexpectedError.prototype)
+  }
+}
+
 export class KCLValueAlreadyDefined extends KCLError {
  constructor(key: string, sourceRanges: [number, number][]) {
    super('name', `Key ${key} was already defined elsewhere`, sourceRanges)
--- a/src/lang/executor.test.ts
+++ b/src/lang/executor.test.ts
@ -5,7 +5,7 @@ import { ProgramMemory } from './executor'
 import { initPromise } from './rust'
 import { enginelessExecutor } from '../lib/testHelpers'
 import { vi } from 'vitest'
-import { KCLUndefinedValueError } from './errors'
+import { KCLError } from './errors'

 beforeAll(() => initPromise)

@ -30,29 +30,6 @@ const newVar = myVar + 1`
    const { root } = await exe(code)
    expect(root.myVar.value).toBe('a str another str')
  })
-  it('test with function call', async () => {
-    const code = `
-const myVar = "hello"
-log(5, myVar)`
-    const programMemoryOverride: ProgramMemory['root'] = {
-      log: {
-        type: 'userVal',
-        value: vi.fn(),
-        __meta: [
-          {
-            sourceRange: [0, 0],
-            pathToNode: [],
-          },
-        ],
-      },
-    }
-    const { root } = await enginelessExecutor(parser_wasm(code), {
-      root: programMemoryOverride,
-      pendingMemory: {},
-    })
-    expect(root.myVar.value).toBe('hello')
-    expect(programMemoryOverride.log.value).toHaveBeenCalledWith(5, 'hello')
-  })
  it('fn funcN = () => {} execute', async () => {
    const { root } = await exe(
      [
@ -84,8 +61,7 @@ show(mySketch)
        from: [0, 0],
        __geoMeta: {
          sourceRange: [43, 80],
-          id: '37333036-3033-4432-b530-643030303837',
-          pathToNode: [],
+          id: expect.any(String),
        },
        name: 'myPath',
      },
@ -93,10 +69,10 @@ show(mySketch)
        type: 'toPoint',
        to: [2, 3],
        from: [0, 2],
+        name: '',
        __geoMeta: {
          sourceRange: [86, 102],
-          id: '32343136-3330-4134-a462-376437386365',
-          pathToNode: [],
+          id: expect.any(String),
        },
      },
      {
@ -105,8 +81,7 @@ show(mySketch)
        from: [2, 3],
        __geoMeta: {
          sourceRange: [108, 151],
-          id: '32306132-6130-4138-b832-636363326330',
-          pathToNode: [],
+          id: expect.any(String),
        },
        name: 'rightPath',
      },
@ -170,13 +145,12 @@ show(mySketch)
    expect(root.mySk1).toEqual({
      type: 'sketchGroup',
      start: {
-        type: 'base',
        to: [0, 0],
        from: [0, 0],
+        name: '',
        __geoMeta: {
-          id: '37663863-3664-4366-a637-623739336334',
+          id: expect.any(String),
          sourceRange: [14, 34],
-          pathToNode: [],
        },
      },
      value: [
@ -184,10 +158,10 @@ show(mySketch)
          type: 'toPoint',
          to: [1, 1],
          from: [0, 0],
+          name: '',
          __geoMeta: {
            sourceRange: [40, 56],
-            id: '34356231-3362-4363-b935-393033353034',
-            pathToNode: [],
+            id: expect.any(String),
          },
        },
        {
@ -196,8 +170,7 @@ show(mySketch)
          from: [1, 1],
          __geoMeta: {
            sourceRange: [62, 100],
-            id: '39623339-3538-4366-b633-356630326639',
-            pathToNode: [],
+            id: expect.any(String),
          },
          name: 'myPath',
        },
@ -205,17 +178,17 @@ show(mySketch)
          type: 'toPoint',
          to: [1, 1],
          from: [0, 1],
+          name: '',
          __geoMeta: {
            sourceRange: [106, 122],
-            id: '30636135-6232-4335-b665-366562303161',
-            pathToNode: [],
+            id: expect.any(String),
          },
        },
      ],
      position: [0, 0, 0],
      rotation: [0, 0, 0, 1],
-      id: '30376661-3039-4965-b532-653665313731',
-      __meta: [{ sourceRange: [14, 34], pathToNode: [] }],
+      id: expect.any(String),
+      __meta: [{ sourceRange: [14, 34] }],
    })
  })
  it('execute array expression', async () => {
@ -230,13 +203,6 @@ show(mySketch)
        value: 3,
        __meta: [
          {
-            pathToNode: [
-              ['body', ''],
-              [0, 'index'],
-              ['declarations', 'VariableDeclaration'],
-              [0, 'index'],
-              ['init', 'VariableDeclaration'],
-            ],
            sourceRange: [14, 15],
          },
        ],
@ -246,25 +212,8 @@ show(mySketch)
        value: [1, '2', 3, 9],
        __meta: [
          {
-            pathToNode: [
-              ['body', ''],
-              [1, 'index'],
-              ['declarations', 'VariableDeclaration'],
-              [0, 'index'],
-              ['init', 'VariableDeclaration'],
-            ],
            sourceRange: [27, 49],
          },
-          {
-            pathToNode: [
-              ['body', ''],
-              [0, 'index'],
-              ['declarations', 'VariableDeclaration'],
-              [0, 'index'],
-              ['init', 'VariableDeclaration'],
-            ],
-            sourceRange: [14, 15],
-          },
        ],
      },
    })
@ -280,13 +229,6 @@ show(mySketch)
      value: { aStr: 'str', anum: 2, identifier: 3, binExp: 9 },
      __meta: [
        {
-          pathToNode: [
-            ['body', ''],
-            [1, 'index'],
-            ['declarations', 'VariableDeclaration'],
-            [0, 'index'],
-            ['init', 'VariableDeclaration'],
-          ],
          sourceRange: [27, 83],
        },
      ],
@ -302,13 +244,6 @@ show(mySketch)
      value: '123',
      __meta: [
        {
-          pathToNode: [
-            ['body', ''],
-            [1, 'index'],
-            ['declarations', 'VariableDeclaration'],
-            [0, 'index'],
-            ['init', 'VariableDeclaration'],
-          ],
          sourceRange: [41, 50],
        },
      ],
@ -451,17 +386,18 @@ const theExtrude = startSketchAt([0, 0])
  |> extrude(4, %)
 show(theExtrude)`
    await expect(exe(code)).rejects.toEqual(
-      new KCLUndefinedValueError('Memory item myVarZ not found', [[100, 106]])
+      new KCLError(
+        'undefined_value',
+        'memory item key `myVarZ` is not defined',
+        [[100, 106]]
+      )
    )
  })
 })

 // helpers

-async function exe(
-  code: string,
-  programMemory: ProgramMemory = { root: {}, pendingMemory: {} }
-) {
+async function exe(code: string, programMemory: ProgramMemory = { root: {} }) {
  const ast = parser_wasm(code)

  const result = await enginelessExecutor(ast, programMemory)
--- a/src/lang/executor.ts
+++ b/src/lang/executor.ts
@ -1,35 +1,19 @@
-import {
-  Program,
-  BinaryPart,
-  BinaryExpression,
-  PipeExpression,
-  ObjectExpression,
-  MemberExpression,
-  Identifier,
-  CallExpression,
-  ArrayExpression,
-  UnaryExpression,
-} from './abstractSyntaxTreeTypes'
-import { InternalFnNames } from './std/stdTypes'
-import { internalFns } from './std/std'
-import {
-  KCLUndefinedValueError,
-  KCLValueAlreadyDefined,
-  KCLSyntaxError,
-  KCLSemanticError,
-  KCLTypeError,
-} from './errors'
+import { Program } from './abstractSyntaxTreeTypes'
 import {
  EngineCommandManager,
  ArtifactMap,
  SourceRangeMap,
 } from './std/engineConnection'
+import { ProgramReturn } from '../wasm-lib/kcl/bindings/ProgramReturn'
+import { execute_wasm } from '../wasm-lib/pkg/wasm_lib'
+import { KCLError } from './errors'
+import { KclError as RustKclError } from '../wasm-lib/kcl/bindings/KclError'
+import { rangeTypeFix } from './abstractSyntaxTree'

 export type SourceRange = [number, number]
 export type PathToNode = [string | number, string][] // [pathKey, nodeType][]
 export type Metadata = {
  sourceRange: SourceRange
-  pathToNode: PathToNode
 }
 export type Position = [number, number, number]
 export type Rotation = [number, number, number, number]
@ -41,7 +25,6 @@ interface BasePath {
  __geoMeta: {
    id: string
    sourceRange: SourceRange
-    pathToNode: PathToNode
  }
 }

@ -68,9 +51,7 @@ export interface AngledLineTo extends BasePath {
 interface GeoMeta {
  __geoMeta: {
    id: string
-    refId?: string
    sourceRange: SourceRange
-    pathToNode: PathToNode
  }
 }

@ -118,69 +99,16 @@ type MemoryItem = UserVal | SketchGroup | ExtrudeGroup
 interface Memory {
  [key: string]: MemoryItem
 }
-interface PendingMemory {
-  [key: string]: Promise<MemoryItem>
-}

 export interface ProgramMemory {
  root: Memory
-  pendingMemory: Partial<PendingMemory>
-  return?: Identifier[]
-}
-
-const addItemToMemory = (
-  programMemory: ProgramMemory,
-  key: string,
-  sourceRange: [[number, number]],
-  value: MemoryItem | Promise<MemoryItem>
-) => {
-  const _programMemory = programMemory
-  if (_programMemory.root[key] || _programMemory.pendingMemory[key]) {
-    throw new KCLValueAlreadyDefined(key, sourceRange)
-  }
-  if (value instanceof Promise) {
-    _programMemory.pendingMemory[key] = value
-    value.then((resolvedValue) => {
-      _programMemory.root[key] = resolvedValue
-      delete _programMemory.pendingMemory[key]
-    })
-  } else {
-    _programMemory.root[key] = value
-  }
-  return _programMemory
-}
-
-const promisifyMemoryItem = async (obj: MemoryItem) => {
-  if (obj.value instanceof Promise) {
-    const resolvedGuy = await obj.value
-    return {
-      ...obj,
-      value: resolvedGuy,
-    }
-  }
-  return obj
-}
-
-const getMemoryItem = async (
-  programMemory: ProgramMemory,
-  key: string,
-  sourceRanges: [number, number][]
-): Promise<MemoryItem> => {
-  if (programMemory.root[key]) {
-    return programMemory.root[key]
-  }
-  if (programMemory.pendingMemory[key]) {
-    return programMemory.pendingMemory[key] as Promise<MemoryItem>
-  }
-  throw new KCLUndefinedValueError(`Memory item ${key} not found`, sourceRanges)
+  return?: ProgramReturn
 }

 export const executor = async (
  node: Program,
-  programMemory: ProgramMemory = { root: {}, pendingMemory: {} },
+  programMemory: ProgramMemory = { root: {} },
  engineCommandManager: EngineCommandManager,
-  options: { bodyType: 'root' | 'sketch' | 'block' } = { bodyType: 'root' },
-  previousPathToNode: PathToNode = [],
  // work around while the gemotry is still be stored on the frontend
  // will be removed when the stream UI is added.
  tempMapCallback: (a: {
@ -192,9 +120,7 @@ export const executor = async (
  const _programMemory = await _executor(
    node,
    programMemory,
-    engineCommandManager,
-    options,
-    previousPathToNode
+    engineCommandManager
  )
  const { artifactMap, sourceRangeMap } =
    await engineCommandManager.waitForAllCommands()
@ -206,840 +132,25 @@ export const executor = async (

 export const _executor = async (
  node: Program,
-  programMemory: ProgramMemory = { root: {}, pendingMemory: {} },
-  engineCommandManager: EngineCommandManager,
-  options: { bodyType: 'root' | 'sketch' | 'block' } = { bodyType: 'root' },
-  previousPathToNode: PathToNode = []
+  programMemory: ProgramMemory = { root: {} },
+  engineCommandManager: EngineCommandManager
 ): Promise<ProgramMemory> => {
-  let _programMemory: ProgramMemory = {
-    root: {
-      ...programMemory.root,
-    },
-    pendingMemory: {
-      ...programMemory.pendingMemory,
-    },
-    return: programMemory.return,
-  }
-  const { body } = node
-  const proms: Promise<any>[] = []
-  for (let bodyIndex = 0; bodyIndex < body.length; bodyIndex++) {
-    const statement = body[bodyIndex]
-    if (statement.type === 'VariableDeclaration') {
-      for (let index = 0; index < statement.declarations.length; index++) {
-        const declaration = statement.declarations[index]
-        const variableName = declaration.id.name
-        const pathToNode: PathToNode = [
-          ...previousPathToNode,
-          ['body', ''],
-          [bodyIndex, 'index'],
-          ['declarations', 'VariableDeclaration'],
-          [index, 'index'],
-          ['init', 'VariableDeclaration'],
-        ]
-        const sourceRange: SourceRange = [
-          declaration.init.start,
-          declaration.init.end,
-        ]
-        const __meta: Metadata[] = [
-          {
-            pathToNode,
-            sourceRange,
-          },
-        ]
-
-        if (declaration.init.type === 'PipeExpression') {
-          const prom = getPipeExpressionResult(
-            declaration.init,
-            _programMemory,
-            engineCommandManager,
-            pathToNode
-          )
-          proms.push(prom)
-          const value = await prom
-          if (value?.type === 'sketchGroup' || value?.type === 'extrudeGroup') {
-            _programMemory = addItemToMemory(
-              _programMemory,
-              variableName,
-              [sourceRange],
-              value
-            )
-          } else {
-            _programMemory = addItemToMemory(
-              _programMemory,
-              variableName,
-              [sourceRange],
-              {
-                type: 'userVal',
-                value,
-                __meta,
-              }
-            )
-          }
-        } else if (declaration.init.type === 'Identifier') {
-          _programMemory = addItemToMemory(
-            _programMemory,
-            variableName,
-            [sourceRange],
-            {
-              type: 'userVal',
-              value: _programMemory.root[declaration.init.name].value,
-              __meta,
-            }
-          )
-        } else if (declaration.init.type === 'Literal') {
-          _programMemory = addItemToMemory(
-            _programMemory,
-            variableName,
-            [sourceRange],
-            {
-              type: 'userVal',
-              value: declaration.init.value,
-              __meta,
-            }
-          )
-        } else if (declaration.init.type === 'BinaryExpression') {
-          const prom = getBinaryExpressionResult(
-            declaration.init,
-            _programMemory,
-            engineCommandManager
-          )
-          proms.push(prom)
-          _programMemory = addItemToMemory(
-            _programMemory,
-            variableName,
-            [sourceRange],
-            promisifyMemoryItem({
-              type: 'userVal',
-              value: prom,
-              __meta,
-            })
-          )
-        } else if (declaration.init.type === 'UnaryExpression') {
-          const prom = getUnaryExpressionResult(
-            declaration.init,
-            _programMemory,
-            engineCommandManager
-          )
-          proms.push(prom)
-          _programMemory = addItemToMemory(
-            _programMemory,
-            variableName,
-            [sourceRange],
-            promisifyMemoryItem({
-              type: 'userVal',
-              value: prom,
-              __meta,
-            })
-          )
-        } else if (declaration.init.type === 'ArrayExpression') {
-          const valueInfo: Promise<{ value: any; __meta?: Metadata }>[] =
-            declaration.init.elements.map(
-              async (element): Promise<{ value: any; __meta?: Metadata }> => {
-                if (element.type === 'Literal') {
-                  return {
-                    value: element.value,
-                  }
-                } else if (element.type === 'BinaryExpression') {
-                  const prom = getBinaryExpressionResult(
-                    element,
-                    _programMemory,
-                    engineCommandManager
-                  )
-                  proms.push(prom)
-                  return {
-                    value: await prom,
-                  }
-                } else if (element.type === 'PipeExpression') {
-                  const prom = getPipeExpressionResult(
-                    element,
-                    _programMemory,
-                    engineCommandManager,
-                    pathToNode
-                  )
-                  proms.push(prom)
-                  return {
-                    value: await prom,
-                  }
-                } else if (element.type === 'Identifier') {
-                  const node = await getMemoryItem(
-                    _programMemory,
-                    element.name,
-                    [[element.start, element.end]]
-                  )
-                  return {
-                    value: node.value,
-                    __meta: node.__meta[node.__meta.length - 1],
-                  }
-                } else if (element.type === 'UnaryExpression') {
-                  const prom = getUnaryExpressionResult(
-                    element,
-                    _programMemory,
-                    engineCommandManager
-                  )
-                  proms.push(prom)
-                  return {
-                    value: await prom,
-                  }
-                } else {
-                  throw new KCLSyntaxError(
-                    `Unexpected element type ${element.type} in array expression`,
-                    // TODO: Refactor this whole block into a `switch` so that we have a specific
-                    // type here and can put a sourceRange.
-                    []
-                  )
-                }
-              }
-            )
-          const awaitedValueInfo = await Promise.all(valueInfo)
-          const meta = awaitedValueInfo
-            .filter(({ __meta }) => __meta)
-            .map(({ __meta }) => __meta) as Metadata[]
-          _programMemory = addItemToMemory(
-            _programMemory,
-            variableName,
-            [sourceRange],
-            {
-              type: 'userVal',
-              value: awaitedValueInfo.map(({ value }) => value),
-              __meta: [...__meta, ...meta],
-            }
-          )
-        } else if (declaration.init.type === 'ObjectExpression') {
-          const prom = executeObjectExpression(
-            _programMemory,
-            declaration.init,
-            engineCommandManager
-          )
-          proms.push(prom)
-          _programMemory = addItemToMemory(
-            _programMemory,
-            variableName,
-            [sourceRange],
-            promisifyMemoryItem({
-              type: 'userVal',
-              value: prom,
-              __meta,
-            })
-          )
-        } else if (declaration.init.type === 'FunctionExpression') {
-          const fnInit = declaration.init
-
-          _programMemory = addItemToMemory(
-            _programMemory,
-            declaration.id.name,
-            [sourceRange],
-            {
-              type: 'userVal',
-              value: async (...args: any[]) => {
-                let fnMemory: ProgramMemory = {
-                  root: {
-                    ..._programMemory.root,
-                  },
-                  pendingMemory: {
-                    ..._programMemory.pendingMemory,
-                  },
-                }
-                if (args.length > fnInit.params.length) {
-                  throw new KCLSyntaxError(
-                    `Too many arguments passed to function ${declaration.id.name}`,
-                    [[declaration.start, declaration.end]]
-                  )
-                } else if (args.length < fnInit.params.length) {
-                  throw new KCLSyntaxError(
-                    `Too few arguments passed to function ${declaration.id.name}`,
-                    [[declaration.start, declaration.end]]
-                  )
-                }
-                fnInit.params.forEach((param, index) => {
-                  fnMemory = addItemToMemory(
-                    fnMemory,
-                    param.name,
-                    [sourceRange],
-                    {
-                      type: 'userVal',
-                      value: args[index],
-                      __meta,
-                    }
-                  )
-                })
-                const prom = _executor(
-                  fnInit.body,
-                  fnMemory,
-                  engineCommandManager,
-                  {
-                    bodyType: 'block',
-                  }
-                )
-                proms.push(prom)
-                const result = (await prom).return
-                return result
-              },
-              __meta,
-            }
-          )
-        } else if (declaration.init.type === 'MemberExpression') {
-          await Promise.all([...proms]) // TODO wait for previous promises, does that makes sense?
-          const prom = getMemberExpressionResult(
-            declaration.init,
-            _programMemory
-          )
-          proms.push(prom)
-          _programMemory = addItemToMemory(
-            _programMemory,
-            variableName,
-            [sourceRange],
-            promisifyMemoryItem({
-              type: 'userVal',
-              value: prom,
-              __meta,
-            })
-          )
-        } else if (declaration.init.type === 'CallExpression') {
-          const prom = executeCallExpression(
-            _programMemory,
-            declaration.init,
-            engineCommandManager,
-            previousPathToNode
-          )
-          proms.push(prom)
-          _programMemory = addItemToMemory(
-            _programMemory,
-            variableName,
-            [sourceRange],
-            prom.then((a) => {
-              return a?.type === 'sketchGroup' || a?.type === 'extrudeGroup'
-                ? a
-                : {
-                    type: 'userVal',
-                    value: a,
-                    __meta,
-                  }
-            })
-          )
-        } else {
-          throw new KCLSyntaxError(
-            'Unsupported declaration type: ' + declaration.init.type,
-            [[declaration.start, declaration.end]]
-          )
-        }
-      }
-    } else if (statement.type === 'ExpressionStatement') {
-      const expression = statement.expression
-      if (expression.type === 'CallExpression') {
-        const functionName = expression.callee.name
-        const args = expression.arguments.map((arg) => {
-          if (arg.type === 'Literal') {
-            return arg.value
-          } else if (arg.type === 'Identifier') {
-            return _programMemory.root[arg.name]?.value
-          }
-        })
-        if ('show' === functionName) {
-          if (options.bodyType !== 'root') {
-            throw new KCLSemanticError(
-              `Cannot call ${functionName} outside of a root`,
-              [[statement.start, statement.end]]
-            )
-          }
-          _programMemory.return = expression.arguments as any // todo memory redo
-        } else {
-          if (_programMemory.root[functionName] === undefined) {
-            throw new KCLSemanticError(`No such name ${functionName} defined`, [
-              [statement.start, statement.end],
-            ])
-          }
-          _programMemory.root[functionName].value(...args)
-        }
-      }
-    } else if (statement.type === 'ReturnStatement') {
-      if (statement.argument.type === 'BinaryExpression') {
-        const prom = getBinaryExpressionResult(
-          statement.argument,
-          _programMemory,
-          engineCommandManager
-        )
-        proms.push(prom)
-        _programMemory.return = await prom
-      }
-    }
-  }
-  await Promise.all(proms)
-  return _programMemory
-}
-
-function getMemberExpressionResult(
-  expression: MemberExpression,
-  programMemory: ProgramMemory
-) {
-  const propertyName = (
-    expression.property.type === 'Identifier'
-      ? expression.property.name
-      : expression.property.value
-  ) as any
-  const object: any =
-    expression.object.type === 'MemberExpression'
-      ? getMemberExpressionResult(expression.object, programMemory)
-      : programMemory.root[expression.object.name]?.value
-  return object?.[propertyName]
-}
-
-async function getBinaryExpressionResult(
-  expression: BinaryExpression,
-  programMemory: ProgramMemory,
-  engineCommandManager: EngineCommandManager,
-  pipeInfo: {
-    isInPipe: boolean
-    previousResults: any[]
-    expressionIndex: number
-    body: PipeExpression['body']
-    sourceRangeOverride?: SourceRange
-  } = {
-    isInPipe: false,
-    previousResults: [],
-    expressionIndex: 0,
-    body: [],
-  }
-) {
-  const _pipeInfo = {
-    ...pipeInfo,
-    isInPipe: false,
-  }
-  const left = await getBinaryPartResult(
-    expression.left,
-    programMemory,
-    engineCommandManager,
-    _pipeInfo
-  )
-  const right = await getBinaryPartResult(
-    expression.right,
-    programMemory,
-    engineCommandManager,
-    _pipeInfo
-  )
-  if (expression.operator === '+') return left + right
-  if (expression.operator === '-') return left - right
-  if (expression.operator === '*') return left * right
-  if (expression.operator === '/') return left / right
-  if (expression.operator === '%') return left % right
-}
-
-async function getBinaryPartResult(
-  part: BinaryPart,
-  programMemory: ProgramMemory,
-  engineCommandManager: EngineCommandManager,
-  pipeInfo: {
-    isInPipe: boolean
-    previousResults: any[]
-    expressionIndex: number
-    body: PipeExpression['body']
-    sourceRangeOverride?: SourceRange
-  } = {
-    isInPipe: false,
-    previousResults: [],
-    expressionIndex: 0,
-    body: [],
-  }
-): Promise<any> {
-  const _pipeInfo = {
-    ...pipeInfo,
-    isInPipe: false,
-  }
-  if (part.type === 'Literal') {
-    return part.value
-  } else if (part.type === 'Identifier') {
-    return programMemory.root[part.name].value
-  } else if (part.type === 'BinaryExpression') {
-    const prom = getBinaryExpressionResult(
-      part,
-      programMemory,
-      engineCommandManager,
-      _pipeInfo
-    )
-    const result = await prom
-    return result
-  } else if (part.type === 'CallExpression') {
-    const result = await executeCallExpression(
-      programMemory,
-      part,
-      engineCommandManager,
-      [],
-      _pipeInfo
-    )
-    return result
-  }
-}
-
-async function getUnaryExpressionResult(
-  expression: UnaryExpression,
-  programMemory: ProgramMemory,
-  engineCommandManager: EngineCommandManager,
-  pipeInfo: {
-    isInPipe: boolean
-    previousResults: any[]
-    expressionIndex: number
-    body: PipeExpression['body']
-    sourceRangeOverride?: SourceRange
-  } = {
-    isInPipe: false,
-    previousResults: [],
-    expressionIndex: 0,
-    body: [],
-  }
-) {
-  return -(await getBinaryPartResult(
-    expression.argument,
-    programMemory,
-    engineCommandManager,
-    {
-      ...pipeInfo,
-      isInPipe: false,
-    }
-  ))
-}
-
-async function getPipeExpressionResult(
-  expression: PipeExpression,
-  programMemory: ProgramMemory,
-  engineCommandManager: EngineCommandManager,
-  previousPathToNode: PathToNode = []
-) {
-  const executedBody = await executePipeBody(
-    expression.body,
-    programMemory,
-    engineCommandManager,
-    previousPathToNode
-  )
-  const result = executedBody[executedBody.length - 1]
-  return result
-}
-
-async function executePipeBody(
-  body: PipeExpression['body'],
-  programMemory: ProgramMemory,
-  engineCommandManager: EngineCommandManager,
-  previousPathToNode: PathToNode = [],
-  expressionIndex = 0,
-  previousResults: any[] = []
-): Promise<any[]> {
-  if (expressionIndex === body.length) {
-    return previousResults
-  }
-  const expression = body[expressionIndex]
-  if (expression.type === 'BinaryExpression') {
-    const result = await getBinaryExpressionResult(
-      expression,
-      programMemory,
+  try {
+    const memory: ProgramMemory = await execute_wasm(
+      JSON.stringify(node),
+      JSON.stringify(programMemory),
      engineCommandManager
    )
-    return executePipeBody(
-      body,
-      programMemory,
-      engineCommandManager,
-      previousPathToNode,
-      expressionIndex + 1,
-      [...previousResults, result]
+    return memory
+  } catch (e: any) {
+    const parsed: RustKclError = JSON.parse(e.toString())
+    const kclError = new KCLError(
+      parsed.kind,
+      parsed.msg,
+      rangeTypeFix(parsed.sourceRanges)
    )
-  } else if (expression.type === 'CallExpression') {
-    return await executeCallExpression(
-      programMemory,
-      expression,
-      engineCommandManager,
-      previousPathToNode,
-      {
-        isInPipe: true,
-        previousResults,
-        expressionIndex,
-        body,
-      }
-    )
-  }

-  throw new KCLSyntaxError('Invalid pipe expression', [
-    [expression.start, expression.end],
-  ])
-}
-
-async function executeObjectExpression(
-  _programMemory: ProgramMemory,
-  objExp: ObjectExpression,
-  engineCommandManager: EngineCommandManager,
-  pipeInfo: {
-    isInPipe: boolean
-    previousResults: any[]
-    expressionIndex: number
-    body: PipeExpression['body']
-    sourceRangeOverride?: SourceRange
-  } = {
-    isInPipe: false,
-    previousResults: [],
-    expressionIndex: 0,
-    body: [],
-  }
-) {
-  const _pipeInfo = {
-    ...pipeInfo,
-    isInPipe: false,
-  }
-  const obj: { [key: string]: any } = {}
-  const proms: Promise<any>[] = []
-  objExp.properties.forEach(async (property) => {
-    if (property.type === 'ObjectProperty') {
-      if (property.value.type === 'Literal') {
-        obj[property.key.name] = property.value.value
-      } else if (property.value.type === 'BinaryExpression') {
-        const prom = getBinaryExpressionResult(
-          property.value,
-          _programMemory,
-          engineCommandManager,
-          _pipeInfo
-        )
-        proms.push(prom)
-        obj[property.key.name] = await prom
-      } else if (property.value.type === 'PipeExpression') {
-        const prom = getPipeExpressionResult(
-          property.value,
-          _programMemory,
-          engineCommandManager
-        )
-        proms.push(prom)
-        obj[property.key.name] = await prom
-      } else if (property.value.type === 'Identifier') {
-        obj[property.key.name] = (
-          await getMemoryItem(_programMemory, property.value.name, [
-            [property.value.start, property.value.end],
-          ])
-        ).value
-      } else if (property.value.type === 'ObjectExpression') {
-        const prom = executeObjectExpression(
-          _programMemory,
-          property.value,
-          engineCommandManager
-        )
-        proms.push(prom)
-        obj[property.key.name] = await prom
-      } else if (property.value.type === 'ArrayExpression') {
-        const prom = executeArrayExpression(
-          _programMemory,
-          property.value,
-          engineCommandManager
-        )
-        proms.push(prom)
-        obj[property.key.name] = await prom
-      } else if (property.value.type === 'CallExpression') {
-        const prom = executeCallExpression(
-          _programMemory,
-          property.value,
-          engineCommandManager,
-          [],
-          _pipeInfo
-        )
-        proms.push(prom)
-        const result = await prom
-        obj[property.key.name] = result
-      } else if (property.value.type === 'UnaryExpression') {
-        const prom = getUnaryExpressionResult(
-          property.value,
-          _programMemory,
-          engineCommandManager
-        )
-        proms.push(prom)
-        obj[property.key.name] = await prom
-      } else {
-        throw new KCLSyntaxError(
-          `Unexpected property type ${property.value.type} in object expression`,
-          [[property.value.start, property.value.end]]
-        )
-      }
-    } else {
-      throw new KCLSyntaxError(
-        `Unexpected property type ${property.type} in object expression`,
-        [[property.value.start, property.value.end]]
-      )
-    }
-  })
-  await Promise.all(proms)
-  return obj
-}
-
-async function executeArrayExpression(
-  _programMemory: ProgramMemory,
-  arrExp: ArrayExpression,
-  engineCommandManager: EngineCommandManager,
-  pipeInfo: {
-    isInPipe: boolean
-    previousResults: any[]
-    expressionIndex: number
-    body: PipeExpression['body']
-    sourceRangeOverride?: SourceRange
-  } = {
-    isInPipe: false,
-    previousResults: [],
-    expressionIndex: 0,
-    body: [],
-  }
-) {
-  const _pipeInfo = {
-    ...pipeInfo,
-    isInPipe: false,
-  }
-  return await Promise.all(
-    arrExp.elements.map((el) => {
-      if (el.type === 'Literal') {
-        return el.value
-      } else if (el.type === 'Identifier') {
-        return _programMemory.root?.[el.name]?.value
-      } else if (el.type === 'BinaryExpression') {
-        return getBinaryExpressionResult(
-          el,
-          _programMemory,
-          engineCommandManager,
-          _pipeInfo
-        )
-      } else if (el.type === 'ObjectExpression') {
-        return executeObjectExpression(_programMemory, el, engineCommandManager)
-      } else if (el.type === 'CallExpression') {
-        const result: any = executeCallExpression(
-          _programMemory,
-          el,
-          engineCommandManager,
-          [],
-          _pipeInfo
-        )
-        return result
-      } else if (el.type === 'UnaryExpression') {
-        return getUnaryExpressionResult(
-          el,
-          _programMemory,
-          engineCommandManager,
-          {
-            ...pipeInfo,
-            isInPipe: false,
-          }
-        )
-      }
-      throw new KCLTypeError('Invalid argument type', [[el.start, el.end]])
-    })
-  )
-}
-
-async function executeCallExpression(
-  programMemory: ProgramMemory,
-  expression: CallExpression,
-  engineCommandManager: EngineCommandManager,
-  previousPathToNode: PathToNode = [],
-  pipeInfo: {
-    isInPipe: boolean
-    previousResults: any[]
-    expressionIndex: number
-    body: PipeExpression['body']
-    sourceRangeOverride?: SourceRange
-  } = {
-    isInPipe: false,
-    previousResults: [],
-    expressionIndex: 0,
-    body: [],
-  }
-) {
-  const {
-    isInPipe,
-    previousResults,
-    expressionIndex,
-    body,
-    sourceRangeOverride,
-  } = pipeInfo
-  const functionName = expression?.callee?.name
-  const _pipeInfo = {
-    ...pipeInfo,
-    isInPipe: false,
-  }
-  const fnArgs = await Promise.all(
-    expression?.arguments?.map(async (arg) => {
-      if (arg.type === 'Literal') {
-        return arg.value
-      } else if (arg.type === 'Identifier') {
-        await new Promise((r) => setTimeout(r)) // push into next even loop, but also probably should fix this
-        const temp = await getMemoryItem(programMemory, arg.name, [
-          [arg.start, arg.end],
-        ])
-        return temp?.type === 'userVal' ? temp.value : temp
-      } else if (arg.type === 'PipeSubstitution') {
-        return previousResults[expressionIndex - 1]
-      } else if (arg.type === 'ArrayExpression') {
-        return await executeArrayExpression(
-          programMemory,
-          arg,
-          engineCommandManager,
-          pipeInfo
-        )
-      } else if (arg.type === 'CallExpression') {
-        const result: any = await executeCallExpression(
-          programMemory,
-          arg,
-          engineCommandManager,
-          previousPathToNode,
-          _pipeInfo
-        )
-        return result
-      } else if (arg.type === 'ObjectExpression') {
-        return await executeObjectExpression(
-          programMemory,
-          arg,
-          engineCommandManager,
-          _pipeInfo
-        )
-      } else if (arg.type === 'UnaryExpression') {
-        return getUnaryExpressionResult(
-          arg,
-          programMemory,
-          engineCommandManager,
-          _pipeInfo
-        )
-      } else if (arg.type === 'BinaryExpression') {
-        return getBinaryExpressionResult(
-          arg,
-          programMemory,
-          engineCommandManager,
-          _pipeInfo
-        )
-      }
-      throw new KCLSyntaxError('Invalid argument type in function call', [
-        [arg.start, arg.end],
-      ])
-    })
-  )
-  if (functionName in internalFns) {
-    const fnNameWithSketchOrExtrude = functionName as InternalFnNames
-    const result = await internalFns[fnNameWithSketchOrExtrude](
-      {
-        programMemory,
-        sourceRange: sourceRangeOverride || [expression.start, expression.end],
-        engineCommandManager,
-        code: JSON.stringify(expression),
-      },
-      fnArgs[0],
-      fnArgs[1],
-      fnArgs[2]
-    )
-    return isInPipe
-      ? await executePipeBody(
-          body,
-          programMemory,
-          engineCommandManager,
-          previousPathToNode,
-          expressionIndex + 1,
-          [...previousResults, result]
-        )
-      : result
-  }
-  const result = await programMemory.root[functionName].value(...fnArgs)
-  return isInPipe
-    ? await executePipeBody(
-        body,
-        programMemory,
-        engineCommandManager,
-        previousPathToNode,
-        expressionIndex + 1,
-        [...previousResults, result]
-      )
-    : result
+    console.log(kclError)
+    throw kclError
+  }
 }
--- a/src/lang/modifyAst.test.ts
+++ b/src/lang/modifyAst.test.ts
@ -182,14 +182,14 @@ describe('Testing moveValueIntoNewVariable', () => {
  const code = `${fn('def')}${fn('ghi')}${fn('jkl')}${fn('hmm')}
 const abc = 3
 const identifierGuy = 5
+const yo = 5 + 6
 const part001 = startSketchAt([-1.2, 4.83])
 |> line([2.8, 0], %)
 |> angledLine([100 + 100, 3.09], %)
 |> angledLine([abc, 3.09], %)
-|> angledLine([def('yo'), 3.09], %)
+|> angledLine([def(yo), 3.09], %)
 |> angledLine([ghi(%), 3.09], %)
-|> angledLine([jkl('yo') + 2, 3.09], %)
-const yo = 5 + 6
+|> angledLine([jkl(yo) + 2, 3.09], %)
 const yo2 = hmm([identifierGuy + 5])
 show(part001)`
  it('should move a binary expression into a new variable', async () => {
@ -231,7 +231,7 @@ show(part001)`
      'newVar'
    )
    const newCode = recast(modifiedAst)
-    expect(newCode).toContain(`const newVar = def('yo')`)
+    expect(newCode).toContain(`const newVar = def(yo)`)
    expect(newCode).toContain(`angledLine([newVar, 3.09], %)`)
  })
  it('should move a binary expression with call expression into a new variable', async () => {
@ -245,7 +245,7 @@ show(part001)`
      'newVar'
    )
    const newCode = recast(modifiedAst)
-    expect(newCode).toContain(`const newVar = jkl('yo') + 2`)
+    expect(newCode).toContain(`const newVar = jkl(yo) + 2`)
    expect(newCode).toContain(`angledLine([newVar, 3.09], %)`)
  })
  it('should move a identifier into a new variable', async () => {
--- a/src/lang/modifyAst.ts
+++ b/src/lang/modifyAst.ts
@ -36,14 +36,14 @@ export function addSketchTo(
  const _node = { ...node }
  const _name = name || findUniqueName(node, 'part')

-  const startSketchAt = createCallExpression('startSketchAt', [
+  const startSketchAt = createCallExpressionStdLib('startSketchAt', [
    createLiteral('default'),
  ])
  const rotate = createCallExpression(axis === 'xz' ? 'rx' : 'ry', [
    createLiteral(90),
    createPipeSubstitution(),
  ])
-  const initialLineTo = createCallExpression('line', [
+  const initialLineTo = createCallExpressionStdLib('line', [
    createLiteral('default'),
    createPipeSubstitution(),
  ])
@ -112,7 +112,9 @@ function addToShow(node: Program, name: string): Program {
  const dumbyStartend = { start: 0, end: 0 }
  const showCallIndex = getShowIndex(_node)
  if (showCallIndex === -1) {
-    const showCall = createCallExpression('show', [createIdentifier(name)])
+    const showCall = createCallExpressionStdLib('show', [
+      createIdentifier(name),
+    ])
    const showExpressionStatement: ExpressionStatement = {
      type: 'ExpressionStatement',
      ...dumbyStartend,
@ -124,7 +126,7 @@ function addToShow(node: Program, name: string): Program {
  const showCall = { ..._node.body[showCallIndex] } as ExpressionStatement
  const showCallArgs = (showCall.expression as CallExpression).arguments
  const newShowCallArgs: Value[] = [...showCallArgs, createIdentifier(name)]
-  const newShowExpression = createCallExpression('show', newShowCallArgs)
+  const newShowExpression = createCallExpressionStdLib('show', newShowCallArgs)

  _node.body[showCallIndex] = {
    ...showCall,
@ -225,7 +227,7 @@ export function extrudeSketch(
  const { node: variableDeclorator, shallowPath: pathToDecleration } =
    getNodeFromPath<VariableDeclarator>(_node, pathToNode, 'VariableDeclarator')

-  const extrudeCall = createCallExpression('extrude', [
+  const extrudeCall = createCallExpressionStdLib('extrude', [
    createLiteral(4),
    shouldPipe
      ? createPipeSubstitution()
@ -313,15 +315,15 @@ export function sketchOnExtrudedFace(
  const newSketch = createVariableDeclaration(
    newSketchName,
    createPipeExpression([
-      createCallExpression('startSketchAt', [
+      createCallExpressionStdLib('startSketchAt', [
        createArrayExpression([createLiteral(0), createLiteral(0)]),
      ]),
-      createCallExpression('lineTo', [
+      createCallExpressionStdLib('lineTo', [
        createArrayExpression([createLiteral(1), createLiteral(1)]),
        createPipeSubstitution(),
      ]),
      createCallExpression('transform', [
-        createCallExpression('getExtrudeWallTransform', [
+        createCallExpressionStdLib('getExtrudeWallTransform', [
          createLiteral(tag),
          createIdentifier(oldSketchName),
        ]),
@ -414,6 +416,40 @@ export function createPipeSubstitution(): PipeSubstitution {
  }
 }

+export function createCallExpressionStdLib(
+  name: string,
+  args: CallExpression['arguments']
+): CallExpression {
+  return {
+    type: 'CallExpression',
+    start: 0,
+    end: 0,
+    callee: {
+      type: 'Identifier',
+      start: 0,
+      end: 0,
+      name,
+    },
+    function: {
+      type: 'StdLib',
+      func: {
+        // We only need the name here to map it back when it serializes
+        // to rust, don't worry about the rest.
+        name,
+        summary: '',
+        description: '',
+        tags: [],
+        returnValue: { type: '', required: false, name: '', schema: {} },
+        args: [],
+        unpublished: false,
+        deprecated: false,
+      },
+    },
+    optional: false,
+    arguments: args,
+  }
+}
+
 export function createCallExpression(
  name: string,
  args: CallExpression['arguments']
@ -428,6 +464,9 @@ export function createCallExpression(
      end: 0,
      name,
    },
+    function: {
+      type: 'InMemory',
+    },
    optional: false,
    arguments: args,
  }
--- a/src/lang/recast.test.ts
+++ b/src/lang/recast.test.ts
@ -45,8 +45,7 @@ const newVar = myVar + 1`
    expect(recasted).toBe(code.trim())
  })
  it('test with function call', () => {
-    const code = `
-const myVar = "hello"
+    const code = `const myVar = "hello"
 log(5, myVar)`
    const { ast } = code2ast(code)
    const recasted = recast(ast)
@ -71,8 +70,7 @@ log(5, myVar)`
  |> lineTo({ to: [1, 0], tag: "rightPath" }, %)
  |> close(%)

-show(mySketch)
-`
+show(mySketch)`
    const { ast } = code2ast(code)
    const recasted = recast(ast)
    expect(recasted).toBe(code.trim())
@ -186,8 +184,7 @@ const myVar2 = yo['a'][key2].c`

 describe('testing recasting with comments and whitespace', () => {
  it('code with comments', () => {
-    const code = `
-const yo = { a: { b: { c: '123' } } }
+    const code = `const yo = { a: { b: { c: '123' } } }
 // this is a comment
 const key = 'c'`

@ -197,20 +194,18 @@ const key = 'c'`
    expect(recasted).toBe(code)
  })
  it('code with comment and extra lines', () => {
-    const code = `
-const yo = 'c' /* this is
+    const code = `const yo = 'c'
+
+/* this is
 a
 comment */
-
 const yo = 'bing'`
    const { ast } = code2ast(code)
    const recasted = recast(ast)
    expect(recasted).toBe(code)
  })
  it('comments at the start and end', () => {
-    const code = `
-// this is a comment
-
+    const code = `// this is a comment
 const yo = { a: { b: { c: '123' } } }
 const key = 'c'

@ -220,12 +215,12 @@ const key = 'c'
    expect(recasted).toBe(code)
  })
  it('comments in a fn block', () => {
-    const code = `
-const myFn = () => {
+    const code = `const myFn = () => {
  // this is a comment
-  const yo = { a: { b: { c: '123' } } } /* block
-  comment */
+  const yo = { a: { b: { c: '123' } } }

+  /* block
+  comment */
  const key = 'c'
  // this is also a comment
 }`
@ -255,7 +250,7 @@ const mySk1 = startSketchAt([0, 0])
  // comment here
  |> lineTo({ to: [0, 1], tag: 'myTag' }, %)
  |> lineTo([1, 1], %) /* and
-  here 
+  here
  */
  // a comment between pipe expression statements
  |> rx(90, %)
@ -269,7 +264,21 @@ const mySk1 = startSketchAt([0, 0])
  */`
    const { ast } = code2ast(code)
    const recasted = recast(ast)
-    expect(recasted).toBe(code)
+    expect(recasted).toBe(`// comment at start
+const mySk1 = startSketchAt([0, 0])
+  |> lineTo([1, 1], %)
+  // comment here
+  |> lineTo({ to: [0, 1], tag: 'myTag' }, %)
+  |> lineTo([1, 1], %)
+  /* and
+  here
+
+a comment between pipe expression statements */
+  |> rx(90, %)
+  // and another with just white space between others below
+  |> ry(45, %)
+  |> rx(45, %)
+// one more for good measure`)
  })
 })

@ -295,7 +304,7 @@ describe('testing call Expressions in BinaryExpressions and UnaryExpressions', (
  it('with unaryExpression in sketch situation', () => {
    const code = [
      'const part001 = startSketchAt([0, 0])',
-      '|> line([-2.21, -legLen(5, min(3, 999))], %)',
+      '  |> line([-2.21, -legLen(5, min(3, 999))], %)',
    ].join('\n')
    const { ast } = code2ast(code)
    const recasted = recast(ast)
@ -309,10 +318,10 @@ describe('it recasts wrapped object expressions in pipe bodies with correct inde
  |> line({ to: [0.62, 4.15], tag: 'seg01' }, %)
  |> line([2.77, -1.24], %)
  |> angledLineThatIntersects({
-      angle: 201,
-      offset: -1.35,
-      intersectTag: 'seg01'
-    }, %)
+        angle: 201,
+        offset: -1.35,
+        intersectTag: 'seg01'
+     }, %)
  |> line([-0.42, -1.72], %)
 show(part001)`
    const { ast } = code2ast(code)
--- a/src/lang/recast.ts
+++ b/src/lang/recast.ts
@ -1,9 +1,9 @@
 import { Program } from './abstractSyntaxTreeTypes'
-import { recast_js } from '../wasm-lib/pkg/wasm_lib'
+import { recast_wasm } from '../wasm-lib/pkg/wasm_lib'

 export const recast = (ast: Program): string => {
  try {
-    const s: string = recast_js(JSON.stringify(ast))
+    const s: string = recast_wasm(JSON.stringify(ast))
    return s
  } catch (e) {
    // TODO: do something real with the error.
--- a/src/lang/std/engineConnection.ts
+++ b/src/lang/std/engineConnection.ts
@ -1,9 +1,14 @@
-import { SourceRange } from '../executor'
-import { Selections } from '../../useStore'
-import { VITE_KC_API_WS_MODELING_URL } from '../../env'
+import { SourceRange } from 'lang/executor'
+import { Selections } from 'useStore'
+import {
+  VITE_KC_API_WS_MODELING_URL,
+  VITE_KC_CONNECTION_TIMEOUT_MS,
+  VITE_KC_CONNECTION_WEBRTC_REPORT_STATS_MS,
+} from 'env'
 import { Models } from '@kittycad/lib'
-import { exportSave } from '../../lib/exportSave'
+import { exportSave } from 'lib/exportSave'
 import { v4 as uuidv4 } from 'uuid'
+import * as Sentry from '@sentry/react'

 interface ResultCommand {
  type: 'result'
@ -22,21 +27,12 @@ export interface SourceRangeMap {
  [key: string]: SourceRange
 }

-interface SelectionsArgs {
-  id: string
-  type: Selections['codeBasedSelections'][number]['type']
+interface NewTrackArgs {
+  conn: EngineConnection
+  mediaStream: MediaStream
 }

-interface CursorSelectionsArgs {
-  otherSelections: Selections['otherSelections']
-  idBasedSelections: { type: string; id: string }[]
-}
-
-export type EngineCommand = Models['WebSocketMessages_type']
-
-type OkResponse = Models['OkModelingCmdResponse_type']
-
-type WebSocketResponse = Models['WebSocketResponses_type']
+type WebSocketResponse = Models['OkWebSocketResponseData_type']

 // EngineConnection encapsulates the connection(s) to the Engine
 // for the EngineCommandManager; namely, the underlying WebSocket
@ -44,44 +40,121 @@ type WebSocketResponse = Models['WebSocketResponses_type']
 export class EngineConnection {
  websocket?: WebSocket
  pc?: RTCPeerConnection
-  lossyDataChannel?: RTCDataChannel
+  unreliableDataChannel?: RTCDataChannel

-  onConnectionStarted: (conn: EngineConnection) => void = () => {}
-
-  waitForReady: Promise<void> = new Promise(() => {})
-  private resolveReady = () => {}
+  private ready: boolean

  readonly url: string
  private readonly token?: string
+  private onWebsocketOpen: (engineConnection: EngineConnection) => void
+  private onDataChannelOpen: (engineConnection: EngineConnection) => void
+  private onEngineConnectionOpen: (engineConnection: EngineConnection) => void
+  private onConnectionStarted: (engineConnection: EngineConnection) => void
+  private onClose: (engineConnection: EngineConnection) => void
+  private onNewTrack: (track: NewTrackArgs) => void

  constructor({
    url,
    token,
-    onConnectionStarted,
+    onWebsocketOpen = () => {},
+    onNewTrack = () => {},
+    onEngineConnectionOpen = () => {},
+    onConnectionStarted = () => {},
+    onClose = () => {},
+    onDataChannelOpen = () => {},
  }: {
    url: string
    token?: string
-    onConnectionStarted: (conn: EngineConnection) => void
+    onWebsocketOpen?: (engineConnection: EngineConnection) => void
+    onDataChannelOpen?: (engineConnection: EngineConnection) => void
+    onEngineConnectionOpen?: (engineConnection: EngineConnection) => void
+    onConnectionStarted?: (engineConnection: EngineConnection) => void
+    onClose?: (engineConnection: EngineConnection) => void
+    onNewTrack?: (track: NewTrackArgs) => void
  }) {
    this.url = url
    this.token = token
+    this.ready = false
+    this.onWebsocketOpen = onWebsocketOpen
+    this.onDataChannelOpen = onDataChannelOpen
+    this.onEngineConnectionOpen = onEngineConnectionOpen
    this.onConnectionStarted = onConnectionStarted
+    this.onClose = onClose
+    this.onNewTrack = onNewTrack

-    // TODO(paultag): This isn't right; this should be when the
-    // connection is in a good place, and tied to the connect() method,
-    // but this is part of a larger refactor to untangle logic. Once the
-    // Connection is pulled apart, we can rework how ready is represented.
-    // This was just the easiest way to ensure some level of parity between
-    // the CommandManager and the Connection until I send a rework for
-    // retry logic.
-    this.waitForReady = new Promise((resolve) => {
-      this.resolveReady = resolve
-    })
+    // TODO(paultag): This ought to be tweakable.
+    const pingIntervalMs = 10000
+
+    setInterval(() => {
+      if (this.isReady()) {
+        // When we're online, every 10 seconds, we'll attempt to put a 'ping'
+        // command through the WebSocket connection. This will help both ends
+        // of the connection maintain the TCP connection without hitting a
+        // timeout condition.
+        this.send({ type: 'ping' })
+      }
+    }, pingIntervalMs)
  }
-
+  // isReady will return true only when the WebRTC *and* WebSocket connection
+  // are connected. During setup, the WebSocket connection comes online first,
+  // which is used to establish the WebRTC connection. The EngineConnection
+  // is not "Ready" until both are connected.
+  isReady() {
+    return this.ready
+  }
+  // shouldTrace will return true when Sentry should be used to instrument
+  // the Engine.
+  shouldTrace() {
+    return Sentry.getCurrentHub()?.getClient()?.getOptions()?.sendClientReports
+  }
+  // connect will attempt to connect to the Engine over a WebSocket, and
+  // establish the WebRTC connections.
+  //
+  // This will attempt the full handshake, and retry if the connection
+  // did not establish.
  connect() {
-    this.websocket = new WebSocket(this.url, [])
+    // TODO(paultag): make this safe to call multiple times, and figure out
+    // when a connection is in progress (state: connecting or something).

+    // Information on the connect transaction
+
+    class SpanPromise {
+      span: Sentry.Span
+      promise: Promise<void>
+      resolve?: (v: void) => void
+
+      constructor(span: Sentry.Span) {
+        this.span = span
+        this.promise = new Promise((resolve) => {
+          this.resolve = (v: void) => {
+            // here we're going to invoke finish before resolving the
+            // promise so that a `.then()` will order strictly after
+            // all spans have -- for sure -- been resolved, rather than
+            // doing a `then` on this promise.
+            this.span.finish()
+            resolve(v)
+          }
+        })
+      }
+    }
+
+    let webrtcMediaTransaction: Sentry.Transaction
+    let websocketSpan: SpanPromise
+    let mediaTrackSpan: SpanPromise
+    let dataChannelSpan: SpanPromise
+    let handshakeSpan: SpanPromise
+    let iceSpan: SpanPromise
+
+    if (this.shouldTrace()) {
+      webrtcMediaTransaction = Sentry.startTransaction({
+        name: 'webrtc-media',
+      })
+      websocketSpan = new SpanPromise(
+        webrtcMediaTransaction.startChild({ op: 'websocket' })
+      )
+    }
+
+    this.websocket = new WebSocket(this.url, [])
    this.websocket.binaryType = 'arraybuffer'

    this.pc = new RTCPeerConnection()
@ -89,18 +162,53 @@ export class EngineConnection {
    this.websocket.addEventListener('open', (event) => {
      console.log('Connected to websocket, waiting for ICE servers')
      if (this.token) {
-        this.websocket?.send(
-          JSON.stringify({ headers: { Authorization: `Bearer ${this.token}` } })
+        this.send({ headers: { Authorization: `Bearer ${this.token}` } })
+      }
+    })
+
+    this.websocket.addEventListener('open', (event) => {
+      if (this.shouldTrace()) {
+        websocketSpan.resolve?.()
+
+        handshakeSpan = new SpanPromise(
+          webrtcMediaTransaction.startChild({ op: 'handshake' })
+        )
+        iceSpan = new SpanPromise(
+          webrtcMediaTransaction.startChild({ op: 'ice' })
+        )
+        dataChannelSpan = new SpanPromise(
+          webrtcMediaTransaction.startChild({
+            op: 'data-channel',
+          })
+        )
+        mediaTrackSpan = new SpanPromise(
+          webrtcMediaTransaction.startChild({
+            op: 'media-track',
+          })
        )
      }
+
+      Promise.all([
+        handshakeSpan.promise,
+        iceSpan.promise,
+        dataChannelSpan.promise,
+        mediaTrackSpan.promise,
+      ]).then(() => {
+        console.log('All spans finished, reporting')
+        webrtcMediaTransaction?.finish()
+      })
+
+      this.onWebsocketOpen(this)
    })

    this.websocket.addEventListener('close', (event) => {
      console.log('websocket connection closed', event)
+      this.close()
    })

    this.websocket.addEventListener('error', (event) => {
      console.log('websocket connection error', event)
+      this.close()
    })

    this.websocket.addEventListener('message', (event) => {
@ -115,31 +223,66 @@ export class EngineConnection {
        return
      }

-      const message: WebSocketResponse = JSON.parse(event.data)
+      const message: Models['WebSocketResponse_type'] = JSON.parse(event.data)

-      if (
-        message.type === 'sdp_answer' &&
-        message.answer.type !== 'unspecified'
-      ) {
-        this.pc?.setRemoteDescription(
-          new RTCSessionDescription({
-            type: message.answer.type,
-            sdp: message.answer.sdp,
-          })
-        )
-      } else if (message.type === 'trickle_ice') {
-        this.pc?.addIceCandidate(message.candidate as RTCIceCandidateInit)
-      } else if (message.type === 'ice_server_info' && this.pc) {
+      if (!message.success) {
+        if (message.request_id) {
+          console.error(`Error in response to request ${message.request_id}:`)
+        } else {
+          console.error(`Error from server:`)
+        }
+        message?.errors?.forEach((error) => {
+          console.error(` - ${error.error_code}: ${error.message}`)
+        })
+        return
+      }
+
+      let resp = message.resp
+      if (!resp) {
+        // If there's no body to the response, we can bail here.
+        return
+      }
+
+      if (resp.type === 'sdp_answer') {
+        let answer = resp.data?.answer
+        if (!answer || answer.type === 'unspecified') {
+          return
+        }
+
+        if (this.pc?.signalingState !== 'stable') {
+          // If the connection is stable, we shouldn't bother updating the
+          // SDP, since we have a stable connection to the backend. If we
+          // need to renegotiate, the whole PeerConnection needs to get
+          // tore down.
+          this.pc?.setRemoteDescription(
+            new RTCSessionDescription({
+              type: answer.type,
+              sdp: answer.sdp,
+            })
+          )
+
+          if (this.shouldTrace()) {
+            // When both ends have a local and remote SDP, we've been able to
+            // set up successfully. We'll still need to find the right ICE
+            // servers, but this is hand-shook.
+            handshakeSpan.resolve?.()
+          }
+        }
+      } else if (resp.type === 'trickle_ice') {
+        let candidate = resp.data?.candidate
+        this.pc?.addIceCandidate(candidate as RTCIceCandidateInit)
+      } else if (resp.type === 'ice_server_info' && this.pc) {
        console.log('received ice_server_info')
+        let ice_servers = resp.data?.ice_servers

-        if (message.ice_servers.length > 0) {
+        if (ice_servers?.length > 0) {
          // When we set the Configuration, we want to always force
          // iceTransportPolicy to 'relay', since we know the topology
          // of the ICE/STUN/TUN server and the engine. We don't wish to
          // talk to the engine in any configuration /other/ than relay
          // from a infra POV.
          this.pc.setConfiguration({
-            iceServers: message.ice_servers,
+            iceServers: ice_servers,
            iceTransportPolicy: 'relay',
          })
        } else {
@ -152,29 +295,21 @@ export class EngineConnection {
        // until the end of this function is setup of our end of the
        // PeerConnection and waiting for events to fire our callbacks.

-        this.pc.addEventListener('connectionstatechange', (e) =>
-          console.log(this.pc?.iceConnectionState)
-        )
+        this.pc.addEventListener('connectionstatechange', (event) => {
+          if (this.pc?.iceConnectionState === 'connected') {
+            iceSpan.resolve?.()
+          }
+        })

        this.pc.addEventListener('icecandidate', (event) => {
          if (!this.pc || !this.websocket) return
-          if (event.candidate === null) {
-            console.log('sent sdp_offer')
-            this.websocket.send(
-              JSON.stringify({
-                type: 'sdp_offer',
-                offer: this.pc.localDescription,
-              })
-            )
-          } else {
+          if (event.candidate !== null) {
            console.log('sending trickle ice candidate')
            const { candidate } = event
-            this.websocket?.send(
-              JSON.stringify({
-                type: 'trickle_ice',
-                candidate: candidate.toJSON(),
-              })
-            )
+            this.send({
+              type: 'trickle_ice',
+              candidate: candidate.toJSON(),
+            })
          }
        })

@ -189,43 +324,244 @@ export class EngineConnection {
          .then(async (descriptionInit) => {
            await this?.pc?.setLocalDescription(descriptionInit)
            console.log('sent sdp_offer begin')
-            const msg = JSON.stringify({
+            this.send({
              type: 'sdp_offer',
              offer: this.pc?.localDescription,
            })
-            this.websocket?.send(msg)
          })
          .catch(console.log)
      }
+
+      // TODO(paultag): This ought to be both controllable, as well as something
+      // like exponential backoff to have some grace on the backend, as well as
+      // fix responsiveness for clients that had a weird network hiccup.
+      const connectionTimeoutMs = VITE_KC_CONNECTION_TIMEOUT_MS
+
+      setTimeout(() => {
+        if (this.isReady()) {
+          return
+        }
+        console.log('engine connection timeout on connection, retrying')
+        this.close()
+        this.connect()
+      }, connectionTimeoutMs)
    })

+    this.pc.addEventListener('track', (event) => {
+      const mediaStream = event.streams[0]
+
+      if (this.shouldTrace()) {
+        let mediaStreamTrack = mediaStream.getVideoTracks()[0]
+        mediaStreamTrack.addEventListener('unmute', () => {
+          // let settings = mediaStreamTrack.getSettings()
+          // mediaTrackSpan.span.setTag("fps", settings.frameRate)
+          // mediaTrackSpan.span.setTag("width", settings.width)
+          // mediaTrackSpan.span.setTag("height", settings.height)
+          mediaTrackSpan.resolve?.()
+        })
+      }
+
+      // Set up the background thread to keep an eye on statistical
+      // information about the WebRTC media stream from the server to
+      // us. We'll also eventually want more global statistical information,
+      // but this will give us a baseline.
+      if (parseInt(VITE_KC_CONNECTION_WEBRTC_REPORT_STATS_MS) !== 0) {
+        setInterval(() => {
+          if (this.pc === undefined) {
+            return
+          }
+          if (!this.shouldTrace()) {
+            return
+          }
+
+          // Use the WebRTC Statistics API to collect statistical information
+          // about the WebRTC connection we're using to report to Sentry.
+          mediaStream.getVideoTracks().forEach((videoTrack) => {
+            let trackStats = new Map<string, any>()
+            this.pc?.getStats(videoTrack).then((videoTrackStats) => {
+              // Sentry only allows 10 metrics per transaction. We're going
+              // to have to pick carefully here, eventually send like a prom
+              // file or something to the peer.
+
+              const transaction = Sentry.startTransaction({
+                name: 'webrtc-stats',
+              })
+              videoTrackStats.forEach((videoTrackReport) => {
+                if (videoTrackReport.type === 'inbound-rtp') {
+                  // RTC Stream Info
+                  // transaction.setMeasurement(
+                  //   'mediaStreamTrack.framesDecoded',
+                  //   videoTrackReport.framesDecoded,
+                  //   'frame'
+                  // )
+                  transaction.setMeasurement(
+                    'rtcFramesDropped',
+                    videoTrackReport.framesDropped,
+                    ''
+                  )
+                  // transaction.setMeasurement(
+                  //   'mediaStreamTrack.framesReceived',
+                  //   videoTrackReport.framesReceived,
+                  //   'frame'
+                  // )
+                  transaction.setMeasurement(
+                    'rtcFramesPerSecond',
+                    videoTrackReport.framesPerSecond,
+                    'fps'
+                  )
+                  transaction.setMeasurement(
+                    'rtcFreezeCount',
+                    videoTrackReport.freezeCount,
+                    ''
+                  )
+                  transaction.setMeasurement(
+                    'rtcJitter',
+                    videoTrackReport.jitter,
+                    'second'
+                  )
+                  // transaction.setMeasurement(
+                  //   'mediaStreamTrack.jitterBufferDelay',
+                  //   videoTrackReport.jitterBufferDelay,
+                  //   ''
+                  // )
+                  // transaction.setMeasurement(
+                  //   'mediaStreamTrack.jitterBufferEmittedCount',
+                  //   videoTrackReport.jitterBufferEmittedCount,
+                  //   ''
+                  // )
+                  // transaction.setMeasurement(
+                  //   'mediaStreamTrack.jitterBufferMinimumDelay',
+                  //   videoTrackReport.jitterBufferMinimumDelay,
+                  //   ''
+                  // )
+                  // transaction.setMeasurement(
+                  //   'mediaStreamTrack.jitterBufferTargetDelay',
+                  //   videoTrackReport.jitterBufferTargetDelay,
+                  //   ''
+                  // )
+                  transaction.setMeasurement(
+                    'rtcKeyFramesDecoded',
+                    videoTrackReport.keyFramesDecoded,
+                    ''
+                  )
+                  transaction.setMeasurement(
+                    'rtcTotalFreezesDuration',
+                    videoTrackReport.totalFreezesDuration,
+                    'second'
+                  )
+                  // transaction.setMeasurement(
+                  //   'mediaStreamTrack.totalInterFrameDelay',
+                  //   videoTrackReport.totalInterFrameDelay,
+                  //   ''
+                  // )
+                  transaction.setMeasurement(
+                    'rtcTotalPausesDuration',
+                    videoTrackReport.totalPausesDuration,
+                    'second'
+                  )
+                  // transaction.setMeasurement(
+                  //   'mediaStreamTrack.totalProcessingDelay',
+                  //   videoTrackReport.totalProcessingDelay,
+                  //   'second'
+                  // )
+                } else if (videoTrackReport.type === 'transport') {
+                  // // Bytes i/o
+                  // transaction.setMeasurement(
+                  //   'mediaStreamTrack.bytesReceived',
+                  //   videoTrackReport.bytesReceived,
+                  //   'byte'
+                  // )
+                  // transaction.setMeasurement(
+                  //   'mediaStreamTrack.bytesSent',
+                  //   videoTrackReport.bytesSent,
+                  //   'byte'
+                  // )
+                }
+              })
+              transaction?.finish()
+            })
+          })
+        }, VITE_KC_CONNECTION_WEBRTC_REPORT_STATS_MS)
+      }
+
+      this.onNewTrack({
+        conn: this,
+        mediaStream: mediaStream,
+      })
+    })
+
+    // During startup, we'll track the time from `connect` being called
+    // until the 'done' event fires.
+    let connectionStarted = new Date()
+
    this.pc.addEventListener('datachannel', (event) => {
-      this.lossyDataChannel = event.channel
+      this.unreliableDataChannel = event.channel

-      console.log('accepted lossy data channel', event.channel.label)
-      this.lossyDataChannel.addEventListener('open', (event) => {
-        this.resolveReady()
-        console.log('lossy data channel opened', event)
+      console.log('accepted unreliable data channel', event.channel.label)
+      this.unreliableDataChannel.addEventListener('open', (event) => {
+        console.log('unreliable data channel opened', event)
+        if (this.shouldTrace()) {
+          dataChannelSpan.resolve?.()
+        }
+
+        this.onDataChannelOpen(this)
+
+        this.onEngineConnectionOpen(this)
+        this.ready = true
      })

-      this.lossyDataChannel.addEventListener('close', (event) => {
-        console.log('lossy data channel closed')
+      this.unreliableDataChannel.addEventListener('close', (event) => {
+        console.log('unreliable data channel closed')
+        this.close()
      })

-      this.lossyDataChannel.addEventListener('error', (event) => {
-        console.log('lossy data channel error')
+      this.unreliableDataChannel.addEventListener('error', (event) => {
+        console.log('unreliable data channel error')
+        this.close()
      })
    })

-    if (this.onConnectionStarted) this.onConnectionStarted(this)
+    this.onConnectionStarted(this)
+  }
+  send(message: object | string) {
+    // TODO(paultag): Add in logic to determine the connection state and
+    // take actions if needed?
+    this.websocket?.send(
+      typeof message === 'string' ? message : JSON.stringify(message)
+    )
  }
  close() {
    this.websocket?.close()
    this.pc?.close()
-    this.lossyDataChannel?.close()
+    this.unreliableDataChannel?.close()
+    this.websocket = undefined
+    this.pc = undefined
+    this.unreliableDataChannel = undefined
+
+    this.onClose(this)
+    this.ready = false
  }
 }

+export type EngineCommand = Models['WebSocketRequest_type']
+type ModelTypes = Models['OkModelingCmdResponse_type']['type']
+
+type UnreliableResponses = Extract<
+  Models['OkModelingCmdResponse_type'],
+  { type: 'highlight_set_entity' }
+>
+interface UnreliableSubscription<T extends UnreliableResponses['type']> {
+  event: T
+  callback: (data: Extract<UnreliableResponses, { type: T }>) => void
+}
+
+interface Subscription<T extends ModelTypes> {
+  event: T
+  callback: (
+    data: Extract<Models['OkModelingCmdResponse_type'], { type: T }>
+  ) => void
+}
+
 export class EngineCommandManager {
  artifactMap: ArtifactMap = {}
  sourceRangeMap: SourceRangeMap = {}
@ -234,10 +570,17 @@ export class EngineCommandManager {
  engineConnection?: EngineConnection
  waitForReady: Promise<void> = new Promise(() => {})
  private resolveReady = () => {}
-  onHoverCallback: (id?: string) => void = () => {}
-  onClickCallback: (selection?: SelectionsArgs) => void = () => {}
-  onCursorsSelectedCallback: (selections: CursorSelectionsArgs) => void =
-    () => {}
+
+  subscriptions: {
+    [event: string]: {
+      [localUnsubscribeId: string]: (a: any) => void
+    }
+  } = {} as any
+  unreliableSubscriptions: {
+    [event: string]: {
+      [localUnsubscribeId: string]: (a: any) => void
+    }
+  } = {} as any
  constructor({
    setMediaStream,
    setIsStreamReady,
@ -258,122 +601,161 @@ export class EngineCommandManager {
    this.engineConnection = new EngineConnection({
      url,
      token,
-      onConnectionStarted: (conn) => {
-        this.engineConnection?.pc?.addEventListener('track', (event) => {
-          console.log('received track', event)
-          const mediaStream = event.streams[0]
-          setMediaStream(mediaStream)
-        })
+      onEngineConnectionOpen: () => {
+        this.resolveReady()
+        setIsStreamReady(true)
+      },
+      onClose: () => {
+        setIsStreamReady(false)
+      },
+      onConnectionStarted: (engineConnection) => {
+        engineConnection?.pc?.addEventListener('datachannel', (event) => {
+          let unreliableDataChannel = event.channel

-        this.engineConnection?.pc?.addEventListener('datachannel', (event) => {
-          let lossyDataChannel = event.channel
-          lossyDataChannel.addEventListener('message', (event) => {
-            const result: OkResponse = JSON.parse(event.data)
-            if (
-              result.type === 'highlight_set_entity' &&
-              result.sequence &&
-              result.sequence > this.inSequence
-            ) {
-              this.onHoverCallback(result.entity_id)
-              this.inSequence = result.sequence
-            }
+          unreliableDataChannel.addEventListener('message', (event) => {
+            const result: UnreliableResponses = JSON.parse(event.data)
+            Object.values(
+              this.unreliableSubscriptions[result.type] || {}
+            ).forEach(
+              // TODO: There is only one response that uses the unreliable channel atm,
+              // highlight_set_entity, if there are more it's likely they will all have the same
+              // sequence logic, but I'm not sure if we use a single global sequence or a sequence
+              // per unreliable subscription.
+              (callback) => {
+                if (
+                  result?.data?.sequence &&
+                  result?.data.sequence > this.inSequence &&
+                  result.type === 'highlight_set_entity'
+                ) {
+                  this.inSequence = result.data.sequence
+                  callback(result)
+                }
+              }
+            )
          })
        })

        // When the EngineConnection starts a connection, we want to register
        // callbacks into the WebSocket/PeerConnection.
-        conn.websocket?.addEventListener('message', (event) => {
+        engineConnection.websocket?.addEventListener('message', (event) => {
          if (event.data instanceof ArrayBuffer) {
            // If the data is an ArrayBuffer, it's  the result of an export command,
            // because in all other cases we send JSON strings. But in the case of
            // export we send a binary blob.
            // Pass this to our export function.
            exportSave(event.data)
-          } else if (
-            typeof event.data === 'string' &&
-            event.data.toLocaleLowerCase().startsWith('error')
-          ) {
-            console.warn('something went wrong: ', event.data)
          } else {
-            const message: WebSocketResponse = JSON.parse(event.data)
-
-            if (message.type === 'modeling') {
-              const id = message.cmd_id
-              const command = this.artifactMap[id]
-              if ('ok' in message.result) {
-                const result: OkResponse = message.result.ok
-                if (result.type === 'select_with_point') {
-                  if (result.entity_id) {
-                    this.onClickCallback({
-                      id: result.entity_id,
-                      type: 'default',
-                    })
-                  } else {
-                    this.onClickCallback()
-                  }
-                }
-              }
-              if (command && command.type === 'pending') {
-                const resolve = command.resolve
-                this.artifactMap[id] = {
-                  type: 'result',
-                  data: message.result,
-                }
-                resolve({
-                  id,
-                })
-              } else {
-                this.artifactMap[id] = {
-                  type: 'result',
-                  data: message.result,
-                }
-              }
+            const message: Models['WebSocketResponse_type'] = JSON.parse(
+              event.data
+            )
+            if (
+              message.success &&
+              message.resp.type === 'modeling' &&
+              message.request_id
+            ) {
+              this.handleModelingCommand(message.resp, message.request_id)
            }
          }
        })
      },
-    })
+      onNewTrack: ({ mediaStream }) => {
+        console.log('received track', mediaStream)

-    // TODO(paultag): this isn't quite right, and the double promises is
-    // pretty grim.
-    this.engineConnection?.waitForReady.then(this.resolveReady)
+        mediaStream.getVideoTracks()[0].addEventListener('mute', () => {
+          console.log('peer is not sending video to us')
+          // this.engineConnection?.close()
+          // this.engineConnection?.connect()
+        })

-    this.waitForReady.then(() => {
-      setIsStreamReady(true)
+        setMediaStream(mediaStream)
+      },
    })

    this.engineConnection?.connect()
  }
+  handleModelingCommand(message: WebSocketResponse, id: string) {
+    if (message.type !== 'modeling') {
+      return
+    }
+    const modelingResponse = message.data.modeling_response
+    Object.values(this.subscriptions[modelingResponse.type] || {}).forEach(
+      (callback) => callback(modelingResponse)
+    )
+
+    const command = this.artifactMap[id]
+    if (command && command.type === 'pending') {
+      const resolve = command.resolve
+      this.artifactMap[id] = {
+        type: 'result',
+        data: modelingResponse,
+      }
+      resolve({
+        id,
+        data: modelingResponse,
+      })
+    } else {
+      this.artifactMap[id] = {
+        type: 'result',
+        data: modelingResponse,
+      }
+    }
+  }
  tearDown() {
-    // close all channels, sockets and WebRTC connections
    this.engineConnection?.close()
  }
-
  startNewSession() {
    this.artifactMap = {}
    this.sourceRangeMap = {}
  }
+  subscribeTo<T extends ModelTypes>({
+    event,
+    callback,
+  }: Subscription<T>): () => void {
+    const localUnsubscribeId = uuidv4()
+    const otherEventCallbacks = this.subscriptions[event]
+    if (otherEventCallbacks) {
+      otherEventCallbacks[localUnsubscribeId] = callback
+    } else {
+      this.subscriptions[event] = {
+        [localUnsubscribeId]: callback,
+      }
+    }
+    return () => this.unSubscribeTo(event, localUnsubscribeId)
+  }
+  private unSubscribeTo(event: ModelTypes, id: string) {
+    delete this.subscriptions[event][id]
+  }
+  subscribeToUnreliable<T extends UnreliableResponses['type']>({
+    event,
+    callback,
+  }: UnreliableSubscription<T>): () => void {
+    const localUnsubscribeId = uuidv4()
+    const otherEventCallbacks = this.unreliableSubscriptions[event]
+    if (otherEventCallbacks) {
+      otherEventCallbacks[localUnsubscribeId] = callback
+    } else {
+      this.unreliableSubscriptions[event] = {
+        [localUnsubscribeId]: callback,
+      }
+    }
+    return () => this.unSubscribeToUnreliable(event, localUnsubscribeId)
+  }
+  private unSubscribeToUnreliable(
+    event: UnreliableResponses['type'],
+    id: string
+  ) {
+    delete this.unreliableSubscriptions[event][id]
+  }
  endSession() {
    // this.websocket?.close()
    // socket.off('command')
  }
-  onHover(callback: (id?: string) => void) {
-    // It's when the user hovers over a part in the 3d scene, and so the engine should tell the
-    // frontend about that (with it's id) so that the FE can highlight code associated with that id
-    this.onHoverCallback = callback
-  }
-  onClick(callback: (selection?: SelectionsArgs) => void) {
-    // It's when the user clicks on a part in the 3d scene, and so the engine should tell the
-    // frontend about that (with it's id) so that the FE can put the user's cursor on the right
-    // line of code
-    this.onClickCallback = callback
-  }
  cusorsSelected(selections: {
    otherSelections: Selections['otherSelections']
    idBasedSelections: { type: string; id: string }[]
  }) {
-    if (this.engineConnection?.websocket?.readyState === 0) {
-      console.log('socket not open')
+    if (!this.engineConnection?.isReady()) {
+      console.log('engine connection isnt ready')
      return
    }
    this.sendSceneCommand({
@ -392,51 +774,58 @@ export class EngineCommandManager {
      cmd_id: uuidv4(),
    })
  }
-  sendSceneCommand(command: EngineCommand) {
-    if (this.engineConnection?.websocket?.readyState === 0) {
+  sendSceneCommand(command: EngineCommand): Promise<any> {
+    if (!this.engineConnection?.isReady()) {
      console.log('socket not ready')
-      return
+      return Promise.resolve()
    }
-    if (command.type !== 'modeling_cmd_req') return
+    if (command.type !== 'modeling_cmd_req') return Promise.resolve()
    const cmd = command.cmd
    if (
      cmd.type === 'camera_drag_move' &&
-      this.engineConnection?.lossyDataChannel
+      this.engineConnection?.unreliableDataChannel
    ) {
      cmd.sequence = this.outSequence
      this.outSequence++
-      this.engineConnection?.lossyDataChannel?.send(JSON.stringify(command))
-      return
+      this.engineConnection?.unreliableDataChannel?.send(
+        JSON.stringify(command)
+      )
+      return Promise.resolve()
    } else if (
      cmd.type === 'highlight_set_entity' &&
-      this.engineConnection?.lossyDataChannel
+      this.engineConnection?.unreliableDataChannel
    ) {
      cmd.sequence = this.outSequence
      this.outSequence++
-      this.engineConnection?.lossyDataChannel?.send(JSON.stringify(command))
-      return
+      this.engineConnection?.unreliableDataChannel?.send(
+        JSON.stringify(command)
+      )
+      return Promise.resolve()
    }
    console.log('sending command', command)
-    this.engineConnection?.websocket?.send(JSON.stringify(command))
+    // since it's not mouse drag or highlighting send over TCP and keep track of the command
+    this.engineConnection?.send(command)
+    return this.handlePendingCommand(command.cmd_id)
  }
-  sendModellingCommand({
+  sendModelingCommand({
    id,
-    params,
    range,
    command,
  }: {
    id: string
-    params: any
    range: SourceRange
-    command: EngineCommand
+    command: EngineCommand | string
  }): Promise<any> {
    this.sourceRangeMap[id] = range

-    if (this.engineConnection?.websocket?.readyState === 0) {
+    if (!this.engineConnection?.isReady()) {
      console.log('socket not ready')
-      return new Promise(() => {})
+      return Promise.resolve()
    }
-    this.engineConnection?.websocket?.send(JSON.stringify(command))
+    this.engineConnection?.send(command)
+    return this.handlePendingCommand(id)
+  }
+  handlePendingCommand(id: string) {
    let resolve: (val: any) => void = () => {}
    const promise = new Promise((_resolve, reject) => {
      resolve = _resolve
@ -448,6 +837,24 @@ export class EngineCommandManager {
    }
    return promise
  }
+  sendModelingCommandFromWasm(
+    id: string,
+    rangeStr: string,
+    commandStr: string
+  ): Promise<any> {
+    if (id === undefined) {
+      throw new Error('id is undefined')
+    }
+    if (rangeStr === undefined) {
+      throw new Error('rangeStr is undefined')
+    }
+    if (commandStr === undefined) {
+      throw new Error('commandStr is undefined')
+    }
+    const range: SourceRange = JSON.parse(rangeStr)
+
+    return this.sendModelingCommand({ id, range, command: commandStr })
+  }
  commandResult(id: string): Promise<any> {
    const command = this.artifactMap[id]
    if (!command) {
--- a/src/lang/std/extrude.ts
+++ b/src/lang/std/extrude.ts
@ -1,88 +0,0 @@
-import { InternalFn } from './stdTypes'
-import {
-  ExtrudeGroup,
-  ExtrudeSurface,
-  SketchGroup,
-  Position,
-  Rotation,
-} from '../executor'
-import { clockwiseSign } from './std'
-import { generateUuidFromHashSeed } from '../../lib/uuid'
-
-export const extrude: InternalFn = (
-  { sourceRange, engineCommandManager, code },
-  length: number,
-  sketchVal: SketchGroup
-): ExtrudeGroup => {
-  const sketch = sketchVal
-  const { position, rotation } = sketchVal
-
-  const id = generateUuidFromHashSeed(
-    JSON.stringify({
-      code,
-      sourceRange,
-      data: {
-        length,
-        sketchVal,
-      },
-    })
-  )
-
-  const extrudeSurfaces: ExtrudeSurface[] = []
-  const extrusionDirection = clockwiseSign(sketch.value.map((line) => line.to))
-  engineCommandManager.sendModellingCommand({
-    id,
-    params: [
-      {
-        length,
-        extrusionDirection: extrusionDirection,
-      },
-    ],
-    range: sourceRange,
-    command: {
-      type: 'modeling_cmd_req',
-      cmd: {
-        type: 'extrude',
-        target: sketch.id,
-        distance: length,
-        cap: true,
-      },
-      cmd_id: id,
-    },
-  })
-
-  return {
-    type: 'extrudeGroup',
-    id,
-    value: extrudeSurfaces, // TODO, this is just an empty array now, should be deleted.
-    height: length,
-    position,
-    rotation,
-    __meta: [
-      {
-        sourceRange,
-        pathToNode: [], // TODO
-      },
-      {
-        sourceRange: sketchVal.__meta[0].sourceRange,
-        pathToNode: sketchVal.__meta[0].pathToNode,
-      },
-    ],
-  }
-}
-
-export const getExtrudeWallTransform: InternalFn = (
-  _,
-  pathName: string,
-  extrudeGroup: ExtrudeGroup
-): {
-  position: Position
-  quaternion: Rotation
-} => {
-  const path = extrudeGroup?.value.find((path) => path.name === pathName)
-  if (!path) throw new Error(`Could not find path with name ${pathName}`)
-  return {
-    position: path.position,
-    quaternion: path.rotation,
-  }
-}
--- a/src/lang/std/sketch.test.ts
+++ b/src/lang/std/sketch.test.ts
@ -97,11 +97,10 @@ describe('testing changeSketchArguments', () => {
  const lineAfterChange = 'lineTo([2, 3], %)'
  test('changeSketchArguments', async () => {
    // Enable rotations #152
-    const genCode = (line: string) => `
-const mySketch001 = startSketchAt([0, 0])
-    |> ${line}
-    |> lineTo([0.46, -5.82], %)
-    // |> rx(45, %)
+    const genCode = (line: string) => `const mySketch001 = startSketchAt([0, 0])
+  |> ${line}
+  |> lineTo([0.46, -5.82], %)
+// |> rx(45, %)
 show(mySketch001)`
    const code = genCode(lineToChange)
    const expectedCode = genCode(lineAfterChange)
@ -160,8 +159,7 @@ show(mySketch001)`
      ],
    })
    // Enable rotations #152
-    const expectedCode = `
-const mySketch001 = startSketchAt([0, 0])
+    const expectedCode = `const mySketch001 = startSketchAt([0, 0])
  // |> rx(45, %)
  |> lineTo([-1.59, -1.54], %)
  |> lineTo([0.46, -5.82], %)
@ -175,12 +173,11 @@ describe('testing addTagForSketchOnFace', () => {
  it('needs to be in it', async () => {
    const originalLine = 'lineTo([-1.59, -1.54], %)'
    // Enable rotations #152
-    const genCode = (line: string) => `
-  const mySketch001 = startSketchAt([0, 0])
-    // |> rx(45, %)
-    |> ${line}
-    |> lineTo([0.46, -5.82], %)
-  show(mySketch001)`
+    const genCode = (line: string) => `const mySketch001 = startSketchAt([0, 0])
+  // |> rx(45, %)
+  |> ${line}
+  |> lineTo([0.46, -5.82], %)
+show(mySketch001)`
    const code = genCode(originalLine)
    const ast = parser_wasm(code)
    const programMemory = await enginelessExecutor(ast)
--- a/src/lang/std/sketch.ts
+++ b/src/lang/std/sketch.ts
@ -23,12 +23,7 @@ import { GuiModes, toolTips, TooTip } from '../../useStore'
 import { splitPathAtPipeExpression } from '../modifyAst'
 import { generateUuidFromHashSeed } from '../../lib/uuid'

-import {
-  SketchLineHelper,
-  ModifyAstBase,
-  InternalFn,
-  TransformCallback,
-} from './stdTypes'
+import { SketchLineHelper, ModifyAstBase, TransformCallback } from './stdTypes'

 import {
  createLiteral,
@ -42,10 +37,7 @@ import {
 } from '../modifyAst'
 import { roundOff, getLength, getAngle } from '../../lib/utils'
 import { getSketchSegmentFromSourceRange } from './sketchConstraints'
-import {
-  intersectionWithParallelLine,
-  perpendicularDistance,
-} from 'sketch-helpers'
+import { perpendicularDistance } from 'sketch-helpers'

 export type Coords2d = [number, number]

@ -115,45 +107,6 @@ function makeId(seed: string | any) {
 }

 export const lineTo: SketchLineHelper = {
-  fn: (
-    { sourceRange, code },
-    data:
-      | [number, number]
-      | {
-          to: [number, number]
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ): SketchGroup => {
-    if (!previousSketch)
-      throw new Error('lineTo must be called after startSketchAt')
-    const sketchGroup = { ...previousSketch }
-    const from = getCoordsFromPaths(sketchGroup, sketchGroup.value.length - 1)
-    const to = 'to' in data ? data.to : data
-
-    const id = makeId({
-      code,
-      sourceRange,
-      data,
-    })
-    const currentPath: Path = {
-      type: 'toPoint',
-      to,
-      from,
-      __geoMeta: {
-        sourceRange,
-        id,
-        pathToNode: [], // TODO
-      },
-    }
-    if ('tag' in data) {
-      currentPath.name = data.tag
-    }
-    return {
-      ...sketchGroup,
-      value: [...sketchGroup.value, currentPath],
-    }
-  },
  add: ({
    node,
    pathToNode,
@ -221,77 +174,6 @@ export const lineTo: SketchLineHelper = {
 }

 export const line: SketchLineHelper = {
-  fn: (
-    { sourceRange, engineCommandManager, code },
-    data:
-      | [number, number]
-      | 'default'
-      | {
-          to: [number, number] | 'default'
-          // name?: string
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ): SketchGroup => {
-    if (!previousSketch) throw new Error('lineTo must be called after lineTo')
-    const sketchGroup = { ...previousSketch }
-    const from = getCoordsFromPaths(sketchGroup, sketchGroup.value.length - 1)
-    let args: [number, number] = [0.2, 1]
-    if (data !== 'default' && 'to' in data && data.to !== 'default') {
-      args = data.to
-    } else if (data !== 'default' && !('to' in data)) {
-      args = data
-    }
-
-    const to: [number, number] = [from[0] + args[0], from[1] + args[1]]
-    const lineData: LineData = {
-      from: [...from, 0],
-      to: [...to, 0],
-    }
-    const id = makeId({
-      code,
-      sourceRange,
-      data,
-    })
-    engineCommandManager.sendModellingCommand({
-      id,
-      params: [lineData, previousSketch],
-      range: sourceRange,
-      command: {
-        type: 'modeling_cmd_req',
-        cmd: {
-          type: 'extend_path',
-          path: sketchGroup.id,
-          segment: {
-            type: 'line',
-            end: {
-              x: lineData.to[0],
-              y: lineData.to[1],
-              z: 0,
-            },
-          },
-        },
-        cmd_id: id,
-      },
-    })
-    const currentPath: Path = {
-      type: 'toPoint',
-      to,
-      from,
-      __geoMeta: {
-        id,
-        sourceRange,
-        pathToNode: [], // TODO
-      },
-    }
-    if (data !== 'default' && 'tag' in data) {
-      currentPath.name = data.tag
-    }
-    return {
-      ...sketchGroup,
-      value: [...sketchGroup.value, currentPath],
-    }
-  },
  add: ({
    node,
    previousProgramMemory,
@ -385,25 +267,6 @@ export const line: SketchLineHelper = {
 }

 export const xLineTo: SketchLineHelper = {
-  fn: (
-    meta,
-    data:
-      | number
-      | {
-          to: number
-          // name?: string
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ) => {
-    if (!previousSketch) throw new Error('bad bad bad')
-    const from = getCoordsFromPaths(
-      previousSketch,
-      previousSketch.value.length - 1
-    )
-    const [xVal, tag] = typeof data !== 'number' ? [data.to, data.tag] : [data]
-    return lineTo.fn(meta, { to: [xVal, from[1]], tag }, previousSketch)
-  },
  add: ({ node, pathToNode, to, replaceExisting, createCallback }) => {
    const _node = { ...node }
    const getNode = getNodeFromPathCurry(_node, pathToNode)
@ -452,25 +315,6 @@ export const xLineTo: SketchLineHelper = {
 }

 export const yLineTo: SketchLineHelper = {
-  fn: (
-    meta,
-    data:
-      | number
-      | {
-          to: number
-          // name?: string
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ) => {
-    if (!previousSketch) throw new Error('bad bad bad')
-    const from = getCoordsFromPaths(
-      previousSketch,
-      previousSketch.value.length - 1
-    )
-    const [yVal, tag] = typeof data !== 'number' ? [data.to, data.tag] : [data]
-    return lineTo.fn(meta, { to: [from[0], yVal], tag }, previousSketch)
-  },
  add: ({ node, pathToNode, to, replaceExisting, createCallback }) => {
    const _node = { ...node }
    const getNode = getNodeFromPathCurry(_node, pathToNode)
@ -519,21 +363,6 @@ export const yLineTo: SketchLineHelper = {
 }

 export const xLine: SketchLineHelper = {
-  fn: (
-    meta,
-    data:
-      | number
-      | {
-          length: number
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ) => {
-    if (!previousSketch) throw new Error('bad bad bad')
-    const [xVal, tag] =
-      typeof data !== 'number' ? [data.length, data.tag] : [data]
-    return line.fn(meta, { to: [xVal, 0], tag }, previousSketch)
-  },
  add: ({ node, pathToNode, to, from, replaceExisting, createCallback }) => {
    const _node = { ...node }
    const getNode = getNodeFromPathCurry(_node, pathToNode)
@ -584,22 +413,6 @@ export const xLine: SketchLineHelper = {
 }

 export const yLine: SketchLineHelper = {
-  fn: (
-    meta,
-    data:
-      | number
-      | {
-          length: number
-          // name?: string
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ) => {
-    if (!previousSketch) throw new Error('bad bad bad')
-    const [yVal, tag] =
-      typeof data !== 'number' ? [data.length, data.tag] : [data]
-    return line.fn(meta, { to: [0, yVal], tag }, previousSketch)
-  },
  add: ({ node, pathToNode, to, from, replaceExisting, createCallback }) => {
    const _node = { ...node }
    const getNode = getNodeFromPathCurry(_node, pathToNode)
@ -644,48 +457,6 @@ export const yLine: SketchLineHelper = {
 }

 export const angledLine: SketchLineHelper = {
-  fn: (
-    { sourceRange, engineCommandManager, code },
-    data:
-      | [number, number]
-      | {
-          angle: number
-          length: number
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ) => {
-    if (!previousSketch) throw new Error('lineTo must be called after lineTo')
-    const sketchGroup = { ...previousSketch }
-    const from = getCoordsFromPaths(sketchGroup, sketchGroup.value.length - 1)
-    const [angle, length] = 'angle' in data ? [data.angle, data.length] : data
-    const to: [number, number] = [
-      from[0] + length * Math.cos((angle * Math.PI) / 180),
-      from[1] + length * Math.sin((angle * Math.PI) / 180),
-    ]
-    const id = makeId({
-      code,
-      sourceRange,
-      data,
-    })
-    const currentPath: Path = {
-      type: 'toPoint',
-      to,
-      from,
-      __geoMeta: {
-        id,
-        sourceRange,
-        pathToNode: [], // TODO
-      },
-    }
-    if ('tag' in data) {
-      currentPath.name = data.tag
-    }
-    return {
-      ...sketchGroup,
-      value: [...sketchGroup.value, currentPath],
-    }
-  },
  add: ({
    node,
    pathToNode,
@ -753,26 +524,6 @@ export const angledLine: SketchLineHelper = {
 }

 export const angledLineOfXLength: SketchLineHelper = {
-  fn: (
-    { sourceRange, programMemory, engineCommandManager, code },
-    data:
-      | [number, number]
-      | {
-          angle: number
-          length: number
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ) => {
-    if (!previousSketch) throw new Error('lineTo must be called after lineTo')
-    const [angle, length, tag] =
-      'angle' in data ? [data.angle, data.length, data.tag] : data
-    return line.fn(
-      { sourceRange, programMemory, engineCommandManager, code },
-      { to: getYComponent(angle, length), tag },
-      previousSketch
-    )
-  },
  add: ({
    node,
    previousProgramMemory,
@ -846,26 +597,6 @@ export const angledLineOfXLength: SketchLineHelper = {
 }

 export const angledLineOfYLength: SketchLineHelper = {
-  fn: (
-    { sourceRange, programMemory, engineCommandManager, code },
-    data:
-      | [number, number]
-      | {
-          angle: number
-          length: number
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ) => {
-    if (!previousSketch) throw new Error('lineTo must be called after lineTo')
-    const [angle, length, tag] =
-      'angle' in data ? [data.angle, data.length, data.tag] : data
-    return line.fn(
-      { sourceRange, programMemory, engineCommandManager, code },
-      { to: getXComponent(angle, length), tag },
-      previousSketch
-    )
-  },
  add: ({
    node,
    previousProgramMemory,
@ -940,33 +671,6 @@ export const angledLineOfYLength: SketchLineHelper = {
 }

 export const angledLineToX: SketchLineHelper = {
-  fn: (
-    { sourceRange, programMemory, engineCommandManager, code },
-    data:
-      | [number, number]
-      | {
-          angle: number
-          to: number
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ) => {
-    if (!previousSketch) throw new Error('lineTo must be called after lineTo')
-    const from = getCoordsFromPaths(
-      previousSketch,
-      previousSketch.value.length - 1
-    )
-    const [angle, xTo, tag] =
-      'angle' in data ? [data.angle, data.to, data.tag] : data
-    const xComponent = xTo - from[0]
-    const yComponent = xComponent * Math.tan((angle * Math.PI) / 180)
-    const yTo = from[1] + yComponent
-    return lineTo.fn(
-      { sourceRange, programMemory, engineCommandManager, code },
-      { to: [xTo, yTo], tag },
-      previousSketch
-    )
-  },
  add: ({
    node,
    pathToNode,
@ -1036,33 +740,6 @@ export const angledLineToX: SketchLineHelper = {
 }

 export const angledLineToY: SketchLineHelper = {
-  fn: (
-    { sourceRange, programMemory, engineCommandManager, code },
-    data:
-      | [number, number]
-      | {
-          angle: number
-          to: number
-          tag?: string
-        },
-    previousSketch: SketchGroup
-  ) => {
-    if (!previousSketch) throw new Error('lineTo must be called after lineTo')
-    const from = getCoordsFromPaths(
-      previousSketch,
-      previousSketch.value.length - 1
-    )
-    const [angle, yTo, tag] =
-      'angle' in data ? [data.angle, data.to, data.tag] : data
-    const yComponent = yTo - from[1]
-    const xComponent = yComponent / Math.tan((angle * Math.PI) / 180)
-    const xTo = from[0] + xComponent
-    return lineTo.fn(
-      { sourceRange, programMemory, engineCommandManager, code },
-      { to: [xTo, yTo], tag },
-      previousSketch
-    )
-  },
  add: ({
    node,
    pathToNode,
@ -1133,37 +810,6 @@ export const angledLineToY: SketchLineHelper = {
 }

 export const angledLineThatIntersects: SketchLineHelper = {
-  fn: (
-    { sourceRange, programMemory, engineCommandManager, code },
-    data: {
-      angle: number
-      intersectTag: string
-      offset?: number
-      tag?: string
-    },
-    previousSketch: SketchGroup
-  ) => {
-    if (!previousSketch) throw new Error('lineTo must be called after lineTo')
-    const intersectPath = previousSketch.value.find(
-      ({ name }) => name === data.intersectTag
-    )
-    if (!intersectPath) throw new Error('intersectTag must match a line')
-    const from = getCoordsFromPaths(
-      previousSketch,
-      previousSketch.value.length - 1
-    )
-    const to = intersectionWithParallelLine({
-      line1: [intersectPath.from, intersectPath.to],
-      line1Offset: data.offset || 0,
-      line2Point: from,
-      line2Angle: data.angle,
-    })
-    return lineTo.fn(
-      { sourceRange, programMemory, engineCommandManager, code },
-      { to, tag: data.tag },
-      previousSketch
-    )
-  },
  add: ({
    node,
    pathToNode,
@ -1526,142 +1172,6 @@ function addTagWithTo(
  }
 }

-export const close: InternalFn = (
-  { sourceRange, engineCommandManager, code },
-  sketchGroup: SketchGroup
-): SketchGroup => {
-  const from = getCoordsFromPaths(sketchGroup, sketchGroup.value.length - 1)
-  const to = sketchGroup.start
-    ? sketchGroup.start.from
-    : getCoordsFromPaths(sketchGroup, 0)
-
-  const lineData: LineData = {
-    from: [...from, 0],
-    to: [...to, 0],
-  }
-  const id = makeId({
-    code,
-    sourceRange,
-    data: sketchGroup,
-  })
-  engineCommandManager.sendModellingCommand({
-    id,
-    params: [lineData],
-    range: sourceRange,
-    command: {
-      type: 'modeling_cmd_req',
-      cmd: {
-        type: 'close_path',
-        path_id: sketchGroup.id,
-      },
-      cmd_id: id,
-    },
-  })
-
-  const currentPath: Path = {
-    type: 'toPoint',
-    to,
-    from,
-    __geoMeta: {
-      id,
-      sourceRange,
-      pathToNode: [], // TODO
-    },
-  }
-  const newValue = [...sketchGroup.value]
-  newValue.push(currentPath)
-  return {
-    ...sketchGroup,
-    value: newValue,
-  }
-}
-
-export const startSketchAt: InternalFn = (
-  { sourceRange, programMemory, engineCommandManager, code },
-  data:
-    | [number, number]
-    | 'default'
-    | {
-        to: [number, number] | 'default'
-        // name?: string
-        tag?: string
-      }
-): SketchGroup => {
-  let to: [number, number] = [0, 0]
-  if (data !== 'default' && 'to' in data && data.to !== 'default') {
-    to = data.to
-  } else if (data !== 'default' && !('to' in data)) {
-    to = data
-  }
-
-  const lineData: { to: [number, number, number] } = {
-    to: [...to, 0],
-  }
-  const id = makeId({
-    code,
-    sourceRange,
-    data,
-  })
-  const pathId = makeId({
-    code,
-    sourceRange,
-    data,
-    isPath: true,
-  })
-  engineCommandManager.sendModellingCommand({
-    id: pathId,
-    params: [lineData],
-    range: sourceRange,
-    command: {
-      type: 'modeling_cmd_req',
-      cmd: {
-        type: 'start_path',
-      },
-      cmd_id: pathId,
-    },
-  })
-  engineCommandManager.sendSceneCommand({
-    type: 'modeling_cmd_req',
-    cmd: {
-      type: 'move_path_pen',
-      path: pathId,
-      to: {
-        x: lineData.to[0],
-        y: lineData.to[1],
-        z: 0,
-      },
-    },
-    cmd_id: id,
-  })
-  const currentPath: Path = {
-    type: 'base',
-    to,
-    from: to,
-    __geoMeta: {
-      id,
-      sourceRange,
-      pathToNode: [], // TODO
-    },
-  }
-  if (data !== 'default' && 'tag' in data) {
-    currentPath.name = data.tag
-  }
-  return {
-    type: 'sketchGroup',
-    start: currentPath,
-    value: [],
-    position: [0, 0, 0],
-    rotation: [0, 0, 0, 1],
-    id: pathId,
-    __meta: [
-      {
-        sourceRange,
-        pathToNode: [], // TODO
-      },
-    ],
-  }
-}
-
 export function getYComponent(
  angleDegree: number,
  xComponent: number
--- a/src/lang/std/sketchConstraints.test.ts
+++ b/src/lang/std/sketchConstraints.test.ts
@ -59,20 +59,20 @@ describe('testing swaping out sketch calls with xLine/xLineTo', () => {
    `  |> lineTo({ to: [1, 1], tag: 'abc1' }, %)`,
    `  |> line({ to: [-2.04, -0.7], tag: 'abc2' }, %)`,
    `  |> angledLine({`,
-    `      angle: 157,`,
-    `      length: 1.69,`,
-    `      tag: 'abc3'`,
-    `    }, %)`,
+    `        angle: 157,`,
+    `        length: 1.69,`,
+    `        tag: 'abc3'`,
+    `     }, %)`,
    `  |> angledLineOfXLength({`,
-    `      angle: 217,`,
-    `      length: 0.86,`,
-    `      tag: 'abc4'`,
-    `    }, %)`,
+    `        angle: 217,`,
+    `        length: 0.86,`,
+    `        tag: 'abc4'`,
+    `     }, %)`,
    `  |> angledLineOfYLength({`,
-    `      angle: 104,`,
-    `      length: 1.58,`,
-    `      tag: 'abc5'`,
-    `    }, %)`,
+    `        angle: 104,`,
+    `        length: 1.58,`,
+    `        tag: 'abc5'`,
+    `     }, %)`,
    `  |> angledLineToX({ angle: 55, to: -2.89, tag: 'abc6' }, %)`,
    `  |> angledLineToY({ angle: 330, to: 2.53, tag: 'abc7' }, %)`,
    `  |> xLine({ length: 1.47, tag: 'abc8' }, %)`,
@ -144,10 +144,10 @@ describe('testing swaping out sketch calls with xLine/xLineTo', () => {
      inputCode: bigExample,
      callToSwap: [
        `angledLine({`,
-        `      angle: 157,`,
-        `      length: 1.69,`,
-        `      tag: 'abc3'`,
-        `    }, %)`,
+        `        angle: 157,`,
+        `        length: 1.69,`,
+        `        tag: 'abc3'`,
+        `     }, %)`,
      ].join('\n'),
      constraintType: 'horizontal',
    })
@ -172,10 +172,10 @@ describe('testing swaping out sketch calls with xLine/xLineTo', () => {
      inputCode: bigExample,
      callToSwap: [
        `angledLineOfXLength({`,
-        `      angle: 217,`,
-        `      length: 0.86,`,
-        `      tag: 'abc4'`,
-        `    }, %)`,
+        `        angle: 217,`,
+        `        length: 0.86,`,
+        `        tag: 'abc4'`,
+        `     }, %)`,
      ].join('\n'),
      constraintType: 'horizontal',
    })
@ -201,10 +201,10 @@ describe('testing swaping out sketch calls with xLine/xLineTo', () => {
      inputCode: bigExample,
      callToSwap: [
        `angledLineOfYLength({`,
-        `      angle: 104,`,
-        `      length: 1.58,`,
-        `      tag: 'abc5'`,
-        `    }, %)`,
+        `        angle: 104,`,
+        `        length: 1.58,`,
+        `        tag: 'abc5'`,
+        `     }, %)`,
      ].join('\n'),
      constraintType: 'vertical',
    })
@ -391,6 +391,7 @@ show(part001)`
      type: 'toPoint',
      to: [5.62, 1.79],
      from: [3.48, 0.44],
+      name: '',
    })
  })
  it('verify it works when the segment is in the `start` property', async () => {
@ -400,6 +401,6 @@ show(part001)`
      programMemory.root['part001'] as SketchGroup,
      [index, index]
    ).segment
-    expect(segment).toEqual({ type: 'base', to: [0, 0.04], from: [0, 0.04] })
+    expect(segment).toEqual({ to: [0, 0.04], from: [0, 0.04], name: '' })
  })
 })
--- a/src/lang/std/sketchConstraints.ts
+++ b/src/lang/std/sketchConstraints.ts
@ -1,4 +1,3 @@
-import { getAngle } from '../../lib/utils'
 import { TooTip, toolTips } from '../../useStore'
 import {
  Program,
@ -6,7 +5,6 @@ import {
  CallExpression,
 } from '../abstractSyntaxTreeTypes'
 import { SketchGroup, SourceRange } from '../executor'
-import { InternalFn } from './stdTypes'

 export function getSketchSegmentFromSourceRange(
  sketchGroup: SketchGroup,
@ -36,79 +34,6 @@ export function getSketchSegmentFromSourceRange(
  }
 }

-export const segLen: InternalFn = (
-  _,
-  segName: string,
-  sketchGroup: SketchGroup
-): number => {
-  const line = sketchGroup?.value.find((seg) => seg?.name === segName)
-  // maybe this should throw, but the language doesn't have a way to handle errors yet
-  if (!line) return 0
-
-  return Math.sqrt(
-    (line.from[1] - line.to[1]) ** 2 + (line.from[0] - line.to[0]) ** 2
-  )
-}
-
-export const segAng: InternalFn = (
-  _,
-  segName: string,
-  sketchGroup: SketchGroup
-): number => {
-  const line = sketchGroup?.value.find((seg) => seg.name === segName)
-  // maybe this should throw, but the language doesn't have a way to handle errors yet
-  if (!line) return 0
-  return getAngle(line.from, line.to)
-}
-
-function segEndFactory(which: 'x' | 'y'): InternalFn {
-  return (_, segName: string, sketchGroup: SketchGroup): number => {
-    const line =
-      sketchGroup?.start?.name === segName
-        ? sketchGroup?.start
-        : sketchGroup?.value.find((seg) => seg.name === segName)
-    // maybe this should throw, but the language doesn't have a way to handle errors yet
-    if (!line) return 0
-    return which === 'x' ? line.to[0] : line.to[1]
-  }
-}
-
-export const segEndX: InternalFn = segEndFactory('x')
-export const segEndY: InternalFn = segEndFactory('y')
-
-function lastSegFactory(which: 'x' | 'y'): InternalFn {
-  return (_, sketchGroup: SketchGroup): number => {
-    const lastLine = sketchGroup?.value[sketchGroup.value.length - 1]
-    return which === 'x' ? lastLine.to[0] : lastLine.to[1]
-  }
-}
-
-export const lastSegX: InternalFn = lastSegFactory('x')
-export const lastSegY: InternalFn = lastSegFactory('y')
-
-function angleToMatchLengthFactory(which: 'x' | 'y'): InternalFn {
-  return (_, segName: string, to: number, sketchGroup: SketchGroup): number => {
-    const isX = which === 'x'
-    const lineToMatch = sketchGroup?.value.find((seg) => seg.name === segName)
-    // maybe this should throw, but the language doesn't have a way to handle errors yet
-    if (!lineToMatch) return 0
-    const lengthToMatch = Math.sqrt(
-      (lineToMatch.from[1] - lineToMatch.to[1]) ** 2 +
-        (lineToMatch.from[0] - lineToMatch.to[0]) ** 2
-    )
-
-    const lastLine = sketchGroup?.value[sketchGroup.value.length - 1]
-    const diff = Math.abs(to - (isX ? lastLine.to[0] : lastLine.to[1]))
-
-    const angleR = Math[isX ? 'acos' : 'asin'](diff / lengthToMatch)
-
-    return diff > lengthToMatch ? 0 : (angleR * 180) / Math.PI
-  }
-}
-
-export const angleToMatchLengthX: InternalFn = angleToMatchLengthFactory('x')
-export const angleToMatchLengthY: InternalFn = angleToMatchLengthFactory('y')
-
 export function isSketchVariablesLinked(
  secondaryVarDec: VariableDeclarator,
  primaryVarDec: VariableDeclarator,
--- a/src/lang/std/sketchcombos.test.ts
+++ b/src/lang/std/sketchcombos.test.ts
@ -133,63 +133,63 @@ const myAng2 = 134
 const part001 = startSketchAt([0, 0])
  |> line({ to: [1, 3.82], tag: 'seg01' }, %) // ln-should-get-tag
  |> angledLineToX([
-      -angleToMatchLengthX('seg01', myVar, %),
-      myVar
+        -angleToMatchLengthX('seg01', myVar, %),
+        myVar
    ], %) // ln-lineTo-xAbsolute should use angleToMatchLengthX helper
  |> angledLineToY([
-      -angleToMatchLengthY('seg01', myVar, %),
-      myVar
+        -angleToMatchLengthY('seg01', myVar, %),
+        myVar
    ], %) // ln-lineTo-yAbsolute should use angleToMatchLengthY helper
  |> angledLine([45, segLen('seg01', %)], %) // ln-lineTo-free should become angledLine
  |> angledLine([45, segLen('seg01', %)], %) // ln-angledLineToX-free should become angledLine
  |> angledLine([myAng, segLen('seg01', %)], %) // ln-angledLineToX-angle should become angledLine
  |> angledLineToX([
-      angleToMatchLengthX('seg01', myVar2, %),
-      myVar2
+        angleToMatchLengthX('seg01', myVar2, %),
+        myVar2
    ], %) // ln-angledLineToX-xAbsolute should use angleToMatchLengthX to get angle
  |> angledLine([-45, segLen('seg01', %)], %) // ln-angledLineToY-free should become angledLine
  |> angledLine([myAng2, segLen('seg01', %)], %) // ln-angledLineToY-angle should become angledLine
  |> angledLineToY([
-      angleToMatchLengthY('seg01', myVar3, %),
-      myVar3
+        angleToMatchLengthY('seg01', myVar3, %),
+        myVar3
    ], %) // ln-angledLineToY-yAbsolute should use angleToMatchLengthY to get angle
  |> line([
-      min(segLen('seg01', %), myVar),
-      legLen(segLen('seg01', %), myVar)
+        min(segLen('seg01', %), myVar),
+        legLen(segLen('seg01', %), myVar)
    ], %) // ln-should use legLen for y
  |> line([
-      min(segLen('seg01', %), myVar),
-      -legLen(segLen('seg01', %), myVar)
+        min(segLen('seg01', %), myVar),
+        -legLen(segLen('seg01', %), myVar)
    ], %) // ln-legLen but negative
  |> angledLine([-112, segLen('seg01', %)], %) // ln-should become angledLine
  |> angledLine([myVar, segLen('seg01', %)], %) // ln-use segLen for secound arg
  |> angledLine([45, segLen('seg01', %)], %) // ln-segLen again
  |> angledLine([54, segLen('seg01', %)], %) // ln-should be transformed to angledLine
  |> angledLineOfXLength([
-      legAngX(segLen('seg01', %), myVar),
-      min(segLen('seg01', %), myVar)
+        legAngX(segLen('seg01', %), myVar),
+        min(segLen('seg01', %), myVar)
    ], %) // ln-should use legAngX to calculate angle
  |> angledLineOfXLength([
-      180 + legAngX(segLen('seg01', %), myVar),
-      min(segLen('seg01', %), myVar)
+        180 + legAngX(segLen('seg01', %), myVar),
+        min(segLen('seg01', %), myVar)
    ], %) // ln-same as above but should have + 180 to match original quadrant
  |> line([
-      legLen(segLen('seg01', %), myVar),
-      min(segLen('seg01', %), myVar)
+        legLen(segLen('seg01', %), myVar),
+        min(segLen('seg01', %), myVar)
    ], %) // ln-legLen again but yRelative
  |> line([
-      -legLen(segLen('seg01', %), myVar),
-      min(segLen('seg01', %), myVar)
+        -legLen(segLen('seg01', %), myVar),
+        min(segLen('seg01', %), myVar)
    ], %) // ln-negative legLen yRelative
  |> angledLine([58, segLen('seg01', %)], %) // ln-angledLineOfYLength-free should become angledLine
  |> angledLine([myAng, segLen('seg01', %)], %) // ln-angledLineOfYLength-angle should become angledLine
  |> angledLineOfXLength([
-      legAngY(segLen('seg01', %), myVar),
-      min(segLen('seg01', %), myVar)
+        legAngY(segLen('seg01', %), myVar),
+        min(segLen('seg01', %), myVar)
    ], %) // ln-angledLineOfYLength-yRelative use legAngY
  |> angledLineOfXLength([
-      270 + legAngY(segLen('seg01', %), myVar),
-      min(segLen('seg01', %), myVar)
+        270 + legAngY(segLen('seg01', %), myVar),
+        min(segLen('seg01', %), myVar)
    ], %) // ln-angledLineOfYLength-yRelative with angle > 90 use binExp
  |> xLine(segLen('seg01', %), %) // ln-xLine-free should sub in segLen
  |> yLine(segLen('seg01', %), %) // ln-yLine-free should sub in segLen
@ -406,8 +406,8 @@ show(part001)`
        'setVertDistance'
      )
      expect(expectedCode).toContain(`|> lineTo([
-      lastSegX(%) + myVar,
-      segEndY('seg01', %) + 2.93
+        lastSegX(%) + myVar,
+        segEndY('seg01', %) + 2.93
    ], %) // xRelative`)
    })
    it('testing for yRelative to horizontal distance', async () => {
@ -417,8 +417,8 @@ show(part001)`
        'setHorzDistance'
      )
      expect(expectedCode).toContain(`|> lineTo([
-      segEndX('seg01', %) + 2.6,
-      lastSegY(%) + myVar
+        segEndX('seg01', %) + 2.6,
+        lastSegY(%) + myVar
    ], %) // yRelative`)
    })
  })
--- a/src/lang/std/sketchcombos.ts
+++ b/src/lang/std/sketchcombos.ts
@ -1426,6 +1426,7 @@ export function transformAstSketchLines({
  selectionRanges.codeBasedSelections.forEach(({ range }, index) => {
    const callBack = transformInfos?.[index].createNode
    const transformTo = transformInfos?.[index].tooltip
+    console.log('transformTo', transformInfos)
    if (!callBack || !transformTo) throw new Error('no callback helper')

    const getNode = getNodeFromPathCurry(
--- a/src/lang/std/std.ts
+++ b/src/lang/std/std.ts
@ -1,170 +0,0 @@
-import {
-  lineTo,
-  xLineTo,
-  yLineTo,
-  line,
-  xLine,
-  yLine,
-  angledLine,
-  angledLineOfXLength,
-  angledLineToX,
-  angledLineOfYLength,
-  angledLineToY,
-  close,
-  startSketchAt,
-  angledLineThatIntersects,
-} from './sketch'
-import {
-  segLen,
-  segAng,
-  angleToMatchLengthX,
-  angleToMatchLengthY,
-  segEndX,
-  segEndY,
-  lastSegX,
-  lastSegY,
-} from './sketchConstraints'
-import { getExtrudeWallTransform, extrude } from './extrude'
-
-import { InternalFn, InternalFnNames } from './stdTypes'
-
-// const transform: InternalFn = <T extends SketchGroup | ExtrudeGroup>(
-//   { sourceRange }: InternalFirstArg,
-//   transformInfo: {
-//     position: Position
-//     quaternion: Rotation
-//   },
-//   sketch: T
-// ): T => {
-//   const quaternionToApply = new Quaternion(...transformInfo?.quaternion)
-//   const newQuaternion = new Quaternion(...sketch.rotation).multiply(
-//     quaternionToApply.invert()
-//   )
-
-//   const oldPosition = new Vector3(...sketch?.position)
-//   const newPosition = oldPosition
-//     .applyQuaternion(quaternionToApply)
-//     .add(new Vector3(...transformInfo?.position))
-//   return {
-//     ...sketch,
-//     position: newPosition.toArray(),
-//     rotation: newQuaternion.toArray(),
-//     __meta: [
-//       ...sketch.__meta,
-//       {
-//         sourceRange,
-//         pathToNode: [], // TODO
-//       },
-//     ],
-//   }
-// }
-
-// const translate: InternalFn = <T extends SketchGroup | ExtrudeGroup>(
-//   { sourceRange }: InternalFirstArg,
-//   vec3: [number, number, number],
-//   sketch: T
-// ): T => {
-//   const oldPosition = new Vector3(...sketch.position)
-//   const newPosition = oldPosition.add(new Vector3(...vec3))
-//   return {
-//     ...sketch,
-//     position: newPosition.toArray(),
-//     __meta: [
-//       ...sketch.__meta,
-//       {
-//         sourceRange,
-//         pathToNode: [], // TODO
-//       },
-//     ],
-//   }
-// }
-
-const min: InternalFn = (_, a: number, b: number): number => Math.min(a, b)
-
-const legLen: InternalFn = (_, hypotenuse: number, leg: number): number =>
-  Math.sqrt(
-    hypotenuse ** 2 - Math.min(Math.abs(leg), Math.abs(hypotenuse)) ** 2
-  )
-
-const legAngX: InternalFn = (_, hypotenuse: number, leg: number): number =>
-  (Math.acos(Math.min(leg, hypotenuse) / hypotenuse) * 180) / Math.PI
-
-const legAngY: InternalFn = (_, hypotenuse: number, leg: number): number =>
-  (Math.asin(Math.min(leg, hypotenuse) / hypotenuse) * 180) / Math.PI
-
-export const internalFns: { [key in InternalFnNames]: InternalFn } = {
-  // TODO - re-enable these
-  // rx: rotateOnAxis([1, 0, 0]), // Enable rotations #152
-  // ry: rotateOnAxis([0, 1, 0]),
-  // rz: rotateOnAxis([0, 0, 1]),
-  extrude,
-  // translate,
-  // transform,
-  getExtrudeWallTransform,
-  min,
-  legLen,
-  legAngX,
-  legAngY,
-  segEndX,
-  segEndY,
-  lastSegX,
-  lastSegY,
-  segLen,
-  segAng,
-  angleToMatchLengthX,
-  angleToMatchLengthY,
-  lineTo: lineTo.fn,
-  xLineTo: xLineTo.fn,
-  yLineTo: yLineTo.fn,
-  line: line.fn,
-  xLine: xLine.fn,
-  yLine: yLine.fn,
-  angledLine: angledLine.fn,
-  angledLineOfXLength: angledLineOfXLength.fn,
-  angledLineToX: angledLineToX.fn,
-  angledLineOfYLength: angledLineOfYLength.fn,
-  angledLineToY: angledLineToY.fn,
-  angledLineThatIntersects: angledLineThatIntersects.fn,
-  startSketchAt,
-  close,
-}
-
-// function rotateOnAxis<T extends SketchGroup | ExtrudeGroup>(
-//   axisMultiplier: [number, number, number]
-// ): InternalFn {
-//   return ({ sourceRange }, rotationD: number, sketch: T): T => {
-//     const rotationR = rotationD * (Math.PI / 180)
-//     const rotateVec = new Vector3(...axisMultiplier)
-//     const quaternion = new Quaternion()
-//     quaternion.setFromAxisAngle(rotateVec, rotationR)
-
-//     const position = new Vector3(...sketch.position)
-//       .applyQuaternion(quaternion)
-//       .toArray()
-
-//     const existingQuat = new Quaternion(...sketch.rotation)
-//     const rotation = quaternion.multiply(existingQuat).toArray()
-//     return {
-//       ...sketch,
-//       rotation,
-//       position,
-//       __meta: [
-//         ...sketch.__meta,
-//         {
-//           sourceRange,
-//           pathToNode: [], // TODO
-//         },
-//       ],
-//     }
-//   }
-// }
-
-export function clockwiseSign(points: [number, number][]): number {
-  let sum = 0
-  for (let i = 0; i < points.length; i++) {
-    const currentPoint = points[i]
-    const nextPoint = points[(i + 1) % points.length]
-    sum += (nextPoint[0] - currentPoint[0]) * (nextPoint[1] + currentPoint[1])
-  }
-  return sum >= 0 ? 1 : -1
-}
--- a/src/lang/std/stdTypes.ts
+++ b/src/lang/std/stdTypes.ts
@ -17,44 +17,6 @@ export interface PathReturn {
  currentPath: Path
 }

-export type InternalFn = (internals: InternalFirstArg, ...args: any[]) => any
-
-export type InternalFnNames =
-  // TODO re-enable these
-  // | 'translate'
-  // | 'transform'
-  // | 'rx' // Enable rotations #152
-  // | 'ry'
-  // | 'rz'
-  | 'extrude'
-  | 'getExtrudeWallTransform'
-  | 'min'
-  | 'legLen'
-  | 'legAngX'
-  | 'legAngY'
-  | 'segEndX'
-  | 'segEndY'
-  | 'lastSegX'
-  | 'lastSegY'
-  | 'segLen'
-  | 'segAng'
-  | 'angleToMatchLengthX'
-  | 'angleToMatchLengthY'
-  | 'lineTo'
-  | 'yLineTo'
-  | 'xLineTo'
-  | 'line'
-  | 'yLine'
-  | 'xLine'
-  | 'angledLine'
-  | 'angledLineOfXLength'
-  | 'angledLineToX'
-  | 'angledLineOfYLength'
-  | 'angledLineToY'
-  | 'startSketchAt'
-  | 'close'
-  | 'angledLineThatIntersects'
-
 export interface ModifyAstBase {
  node: Program
  previousProgramMemory: ProgramMemory
@ -87,7 +49,6 @@ export type SketchCallTransfromMap = {
 }

 export interface SketchLineHelper {
-  fn: InternalFn
  add: (a: addCall) => {
    modifiedAst: Program
    pathToNode: PathToNode
--- a/src/lang/tokeniser.test.ts
+++ b/src/lang/tokeniser.test.ts
@ -110,7 +110,7 @@ const yi=45`
      "brace        ')'        from 17  to 18",
    ])
    expect(stringSummaryLexer('fn funcName = (param1, param2) => {}')).toEqual([
-      "word         'fn'       from 0   to 2",
+      "keyword      'fn'       from 0   to 2",
      "whitespace   ' '        from 2   to 3",
      "word         'funcName' from 3   to 11",
      "whitespace   ' '        from 11  to 12",
@ -203,7 +203,7 @@ const yi=45`
  it('testing array declaration', () => {
    const result = stringSummaryLexer(`const yo = [1, 2]`)
    expect(result).toEqual([
-      "word         'const'    from 0   to 5",
+      "keyword      'const'    from 0   to 5",
      "whitespace   ' '        from 5   to 6",
      "word         'yo'       from 6   to 8",
      "whitespace   ' '        from 8   to 9",
@ -220,7 +220,7 @@ const yi=45`
  it('testing object declaration', () => {
    const result = stringSummaryLexer(`const yo = {key: 'value'}`)
    expect(result).toEqual([
-      "word         'const'    from 0   to 5",
+      "keyword      'const'    from 0   to 5",
      "whitespace   ' '        from 5   to 6",
      "word         'yo'       from 6   to 8",
      "whitespace   ' '        from 8   to 9",
@ -241,7 +241,7 @@ const prop2 = yo['key']
 const key = 'key'
 const prop3 = yo[key]`)
    expect(result).toEqual([
-      "word         'const'    from 0   to 5",
+      "keyword      'const'    from 0   to 5",
      "whitespace   ' '        from 5   to 6",
      "word         'yo'       from 6   to 8",
      "whitespace   ' '        from 8   to 9",
@ -254,7 +254,7 @@ const prop3 = yo[key]`)
      "string       ''value''  from 17  to 24",
      "brace        '}'        from 24  to 25",
      "whitespace   '\n'        from 25  to 26",
-      "word         'const'    from 26  to 31",
+      "keyword      'const'    from 26  to 31",
      "whitespace   ' '        from 31  to 32",
      "word         'prop'     from 32  to 36",
      "whitespace   ' '        from 36  to 37",
@ -264,7 +264,7 @@ const prop3 = yo[key]`)
      "period       '.'        from 41  to 42",
      "word         'key'      from 42  to 45",
      "whitespace   '\n'        from 45  to 46",
-      "word         'const'    from 46  to 51",
+      "keyword      'const'    from 46  to 51",
      "whitespace   ' '        from 51  to 52",
      "word         'prop2'    from 52  to 57",
      "whitespace   ' '        from 57  to 58",
@ -275,7 +275,7 @@ const prop3 = yo[key]`)
      "string       ''key''    from 63  to 68",
      "brace        ']'        from 68  to 69",
      "whitespace   '\n'        from 69  to 70",
-      "word         'const'    from 70  to 75",
+      "keyword      'const'    from 70  to 75",
      "whitespace   ' '        from 75  to 76",
      "word         'key'      from 76  to 79",
      "whitespace   ' '        from 79  to 80",
@ -283,7 +283,7 @@ const prop3 = yo[key]`)
      "whitespace   ' '        from 81  to 82",
      "string       ''key''    from 82  to 87",
      "whitespace   '\n'        from 87  to 88",
-      "word         'const'    from 88  to 93",
+      "keyword      'const'    from 88  to 93",
      "whitespace   ' '        from 93  to 94",
      "word         'prop3'    from 94  to 99",
      "whitespace   ' '        from 99  to 100",
@ -299,7 +299,7 @@ const prop3 = yo[key]`)
    const result = stringSummaryLexer(`const yo = 45 // this is a comment
 const yo = 6`)
    expect(result).toEqual([
-      "word         'const'    from 0   to 5",
+      "keyword      'const'    from 0   to 5",
      "whitespace   ' '        from 5   to 6",
      "word         'yo'       from 6   to 8",
      "whitespace   ' '        from 8   to 9",
@ -307,9 +307,9 @@ const yo = 6`)
      "whitespace   ' '        from 10  to 11",
      "number       '45'       from 11  to 13",
      "whitespace   ' '        from 13  to 14",
-      "linecomment  '// this is a comment' from 14  to 34",
+      "lineComment  '// this is a comment' from 14  to 34",
      "whitespace   '\n'        from 34  to 35",
-      "word         'const'    from 35  to 40",
+      "keyword      'const'    from 35  to 40",
      "whitespace   ' '        from 40  to 41",
      "word         'yo'       from 41  to 43",
      "whitespace   ' '        from 43  to 44",
@ -328,9 +328,9 @@ const yo=45`)
      "string       ''hi''     from 4   to 8",
      "brace        ')'        from 8   to 9",
      "whitespace   '\n'        from 9   to 10",
-      "linecomment  '// comment on a line by itself' from 10  to 40",
+      "lineComment  '// comment on a line by itself' from 10  to 40",
      "whitespace   '\n'        from 40  to 41",
-      "word         'const'    from 41  to 46",
+      "keyword      'const'    from 41  to 46",
      "whitespace   ' '        from 46  to 47",
      "word         'yo'       from 47  to 49",
      "operator     '='        from 49  to 50",
@ -342,7 +342,7 @@ const yo=45`)
 const ya = 6 */
 const yi=45`)
    expect(result).toEqual([
-      "word         'const'    from 0   to 5",
+      "keyword      'const'    from 0   to 5",
      "whitespace   ' '        from 5   to 6",
      "word         'yo'       from 6   to 8",
      "whitespace   ' '        from 8   to 9",
@ -350,10 +350,10 @@ const yi=45`)
      "whitespace   ' '        from 10  to 11",
      "number       '45'       from 11  to 13",
      "whitespace   ' '        from 13  to 14",
-      `blockcomment '/* this is a comment
+      `blockComment '/* this is a comment
 const ya = 6 */' from 14  to 50`,
      "whitespace   '\n'        from 50  to 51",
-      "word         'const'    from 51  to 56",
+      "keyword      'const'    from 51  to 56",
      "whitespace   ' '        from 56  to 57",
      "word         'yi'       from 57  to 59",
      "operator     '='        from 59  to 60",
--- a/src/lang/tokeniser.ts
+++ b/src/lang/tokeniser.ts
@ -1,8 +1,8 @@
 import { lexer_js } from '../wasm-lib/pkg/wasm_lib'
 import { initPromise } from './rust'
-import { Token } from '../wasm-lib/bindings/Token'
+import { Token } from '../wasm-lib/kcl/bindings/Token'

-export type { Token } from '../wasm-lib/bindings/Token'
+export type { Token } from '../wasm-lib/kcl/bindings/Token'

 export async function asyncLexer(str: string): Promise<Token[]> {
  await initPromise
--- a/src/lang/util.ts
+++ b/src/lang/util.ts
@ -26,3 +26,12 @@ export function updateCursors(
    setCursor(newSelections)
  }
 }
+
+export function isReducedMotion(): boolean {
+  return (
+    typeof window !== 'undefined' &&
+    window.matchMedia &&
+    // TODO/Note I (Kurt) think '(prefers-reduced-motion: reduce)' and '(prefers-reduced-motion)' are equivalent, but not 100% sure
+    window.matchMedia('(prefers-reduced-motion)').matches
+  )
+}
--- a/src/lib/commands.ts
+++ b/src/lib/commands.ts
@ -0,0 +1,124 @@
+import { AnyStateMachine, EventFrom, StateFrom } from 'xstate'
+import { isTauri } from './isTauri'
+
+type InitialCommandBarMetaArg = {
+  name: string
+  type: 'string' | 'select'
+  description?: string
+  defaultValue?: string
+  options: string | Array<{ name: string }>
+}
+
+type Platform = 'both' | 'web' | 'desktop'
+
+export type CommandBarMeta = {
+  [key: string]:
+    | {
+        displayValue: (args: string[]) => string
+        args: InitialCommandBarMetaArg[]
+        hide?: Platform
+      }
+    | {
+        hide?: Platform
+      }
+}
+
+export type Command = {
+  owner: string
+  name: string
+  callback: Function
+  meta?: {
+    displayValue(args: string[]): string | string
+    args: SubCommand[]
+  }
+}
+
+export type SubCommand = {
+  name: string
+  type: 'select' | 'string'
+  description?: string
+  options?: Partial<{ name: string }>[]
+}
+
+interface CommandBarArgs<T extends AnyStateMachine> {
+  type: EventFrom<T>['type']
+  state: StateFrom<T>
+  commandBarMeta?: CommandBarMeta
+  send: Function
+  owner: string
+}
+
+export function createMachineCommand<T extends AnyStateMachine>({
+  type,
+  state,
+  commandBarMeta,
+  send,
+  owner,
+}: CommandBarArgs<T>): Command | null {
+  const lookedUpMeta = commandBarMeta && commandBarMeta[type]
+  if (lookedUpMeta && 'hide' in lookedUpMeta) {
+    const { hide } = lookedUpMeta
+    if (hide === 'both') return null
+    else if (hide === 'desktop' && isTauri()) return null
+    else if (hide === 'web' && !isTauri()) return null
+  }
+  let replacedArgs
+
+  if (lookedUpMeta && 'args' in lookedUpMeta) {
+    replacedArgs = lookedUpMeta.args.map((arg) => {
+      const optionsFromContext = state.context[
+        arg.options as keyof typeof state.context
+      ] as { name: string }[] | string | undefined
+      const defaultValueFromContext = state.context[
+        arg.defaultValue as keyof typeof state.context
+      ] as string | undefined
+
+      const options =
+        arg.options instanceof Array
+          ? arg.options.map((o) => ({
+              ...o,
+              description:
+                defaultValueFromContext === o.name ? '(current)' : '',
+            }))
+          : !optionsFromContext || typeof optionsFromContext === 'string'
+          ? [
+              {
+                name: optionsFromContext,
+                description: arg.description || '',
+              },
+            ]
+          : optionsFromContext.map((o) => ({
+              name: o.name || '',
+              description: arg.description || '',
+            }))
+
+      return {
+        ...arg,
+        options,
+      }
+    }) as any[]
+  }
+
+  // We have to recreate this object every time,
+  // otherwise we'll have stale state in the CommandBar
+  // after completing our first action
+  const meta = lookedUpMeta
+    ? {
+        ...lookedUpMeta,
+        args: replacedArgs,
+      }
+    : undefined
+
+  return {
+    name: type,
+    owner,
+    callback: (data: EventFrom<T, typeof type>) => {
+      if (data !== undefined && data !== null) {
+        send(type, { data })
+      } else {
+        send(type)
+      }
+    },
+    meta: meta as any,
+  }
+}
--- a/src/lib/fetcher.ts
+++ b/src/lib/fetcher.ts
@ -1,16 +1,13 @@
-import { useAuthMachine } from '../hooks/useAuthMachine'
+export default function fetcher(input: RequestInfo, init: RequestInit = {}) {
+  const fetcherWithToken = async (token?: string): Promise<JSON> => {
+    const headers = { ...init.headers } as Record<string, string>
+    if (token) {
+      headers.Authorization = `Bearer ${token}`
+    }

-export default async function fetcher<JSON = any>(
-  input: RequestInfo,
-  init: RequestInit = {}
-): Promise<JSON> {
-  const [token] = useAuthMachine((s) => s?.context?.token)
-  const headers = { ...init.headers } as Record<string, string>
-  if (token) {
-    headers.Authorization = `Bearer ${token}`
+    const credentials = 'include' as RequestCredentials
+    const res = await fetch(input, { ...init, credentials, headers })
+    return res.json()
  }
-
-  const credentials = 'include' as RequestCredentials
-  const res = await fetch(input, { ...init, credentials, headers })
-  return res.json()
+  return fetcherWithToken
 }
--- a/src/lib/getSystemTheme.ts
+++ b/src/lib/getSystemTheme.ts
@ -1,9 +0,0 @@
-import { Themes } from '../useStore'
-
-export function getSystemTheme(): Exclude<Themes, 'system'> {
-  return typeof window !== 'undefined' &&
-    'matchMedia' in window &&
-    window.matchMedia('(prefers-color-scheme: dark)').matches
-    ? Themes.Dark
-    : Themes.Light
-}
--- a/src/lib/sorting.ts
+++ b/src/lib/sorting.ts
@ -0,0 +1,64 @@
+import {
+  faArrowDown,
+  faArrowUp,
+  faCircleDot,
+} from '@fortawesome/free-solid-svg-icons'
+import { ProjectWithEntryPointMetadata } from '../Router'
+
+const DESC = ':desc'
+
+export function getSortIcon(currentSort: string, newSort: string) {
+  if (currentSort === newSort) {
+    return faArrowUp
+  } else if (currentSort === newSort + DESC) {
+    return faArrowDown
+  }
+  return faCircleDot
+}
+
+export function getNextSearchParams(currentSort: string, newSort: string) {
+  if (currentSort === null || !currentSort)
+    return { sort_by: newSort + (newSort !== 'modified' ? DESC : '') }
+  if (currentSort.includes(newSort) && !currentSort.includes(DESC))
+    return { sort_by: '' }
+  return {
+    sort_by: newSort + (currentSort.includes(DESC) ? '' : DESC),
+  }
+}
+
+export function getSortFunction(sortBy: string) {
+  const sortByName = (
+    a: ProjectWithEntryPointMetadata,
+    b: ProjectWithEntryPointMetadata
+  ) => {
+    if (a.name && b.name) {
+      return sortBy.includes('desc')
+        ? a.name.localeCompare(b.name)
+        : b.name.localeCompare(a.name)
+    }
+    return 0
+  }
+
+  const sortByModified = (
+    a: ProjectWithEntryPointMetadata,
+    b: ProjectWithEntryPointMetadata
+  ) => {
+    if (
+      a.entrypoint_metadata?.modifiedAt &&
+      b.entrypoint_metadata?.modifiedAt
+    ) {
+      return !sortBy || sortBy.includes('desc')
+        ? b.entrypoint_metadata.modifiedAt.getTime() -
+            a.entrypoint_metadata.modifiedAt.getTime()
+        : a.entrypoint_metadata.modifiedAt.getTime() -
+            b.entrypoint_metadata.modifiedAt.getTime()
+    }
+    return 0
+  }
+
+  if (sortBy?.includes('name')) {
+    return sortByName
+  } else {
+    return sortByModified
+  }
+}
--- a/src/lib/tauriFS.ts
+++ b/src/lib/tauriFS.ts
@ -1,6 +1,11 @@
-import { FileEntry, createDir, exists, writeTextFile } from '@tauri-apps/api/fs'
+import {
+  FileEntry,
+  createDir,
+  exists,
+  readDir,
+  writeTextFile,
+} from '@tauri-apps/api/fs'
 import { documentDir } from '@tauri-apps/api/path'
-import { useStore } from '../useStore'
 import { isTauri } from './isTauri'
 import { ProjectWithEntryPointMetadata } from '../Router'
 import { metadata } from 'tauri-plugin-fs-extra-api'
@ -12,35 +17,31 @@ const INDEX_IDENTIFIER = '$n' // $nn.. will pad the number with 0s
 export const MAX_PADDING = 7

 // Initializes the project directory and returns the path
-export async function initializeProjectDirectory() {
+export async function initializeProjectDirectory(directory: string) {
  if (!isTauri()) {
    throw new Error(
      'initializeProjectDirectory() can only be called from a Tauri app'
    )
  }
-  const { defaultDir: projectDir, setDefaultDir } = useStore.getState()

-  if (projectDir && projectDir.dir.length > 0) {
-    const dirExists = await exists(projectDir.dir)
+  if (directory) {
+    const dirExists = await exists(directory)
    if (!dirExists) {
-      await createDir(projectDir.dir, { recursive: true })
+      await createDir(directory, { recursive: true })
    }
-    return projectDir
+    return directory
  }

-  const appData = await documentDir()
+  const docDirectory = await documentDir()

-  const INITIAL_DEFAULT_DIR = {
-    dir: appData + PROJECT_FOLDER,
-  }
+  const INITIAL_DEFAULT_DIR = docDirectory + PROJECT_FOLDER

-  const defaultDirExists = await exists(INITIAL_DEFAULT_DIR.dir)
+  const defaultDirExists = await exists(INITIAL_DEFAULT_DIR)

  if (!defaultDirExists) {
-    await createDir(INITIAL_DEFAULT_DIR.dir, { recursive: true })
+    await createDir(INITIAL_DEFAULT_DIR, { recursive: true })
  }

-  setDefaultDir(INITIAL_DEFAULT_DIR)
  return INITIAL_DEFAULT_DIR
 }

@ -51,6 +52,25 @@ export function isProjectDirectory(fileOrDir: Partial<FileEntry>) {
  )
 }

+// Read the contents of a directory
+// and return the valid projects
+export async function getProjectsInDir(projectDir: string) {
+  const readProjects = (
+    await readDir(projectDir, {
+      recursive: true,
+    })
+  ).filter(isProjectDirectory)
+
+  const projectsWithMetadata = await Promise.all(
+    readProjects.map(async (p) => ({
+      entrypoint_metadata: await metadata(p.path + '/' + PROJECT_ENTRYPOINT),
+      ...p,
+    }))
+  )
+
+  return projectsWithMetadata
+}
+
 // Creates a new file in the default directory with the default project name
 // Returns the path to the new file
 export async function createNewProject(
--- a/src/lib/testHelpers.ts
+++ b/src/lib/testHelpers.ts
@ -1,6 +1,10 @@
 import { Program } from '../lang/abstractSyntaxTreeTypes'
 import { ProgramMemory, _executor } from '../lang/executor'
-import { EngineCommandManager } from '../lang/std/engineConnection'
+import {
+  EngineCommandManager,
+  EngineCommand,
+} from '../lang/std/engineConnection'
+import { SourceRange } from 'lang/executor'

 class MockEngineCommandManager {
  constructor(mockParams: {
@ -10,13 +14,42 @@ class MockEngineCommandManager {
  startNewSession() {}
  waitForAllCommands() {}
  waitForReady = new Promise<void>((resolve) => resolve())
-  sendModellingCommand() {}
+  sendModelingCommand({
+    id,
+    range,
+    command,
+  }: {
+    id: string
+    range: SourceRange
+    command: EngineCommand
+  }): Promise<any> {
+    return Promise.resolve()
+  }
+  sendModelingCommandFromWasm(
+    id: string,
+    rangeStr: string,
+    commandStr: string
+  ): Promise<any> {
+    if (id === undefined) {
+      throw new Error('id is undefined')
+    }
+    if (rangeStr === undefined) {
+      throw new Error('rangeStr is undefined')
+    }
+    if (commandStr === undefined) {
+      throw new Error('commandStr is undefined')
+    }
+    const command: EngineCommand = JSON.parse(commandStr)
+    const range: SourceRange = JSON.parse(rangeStr)
+
+    return this.sendModelingCommand({ id, range, command })
+  }
  sendSceneCommand() {}
 }

 export async function enginelessExecutor(
  ast: Program,
-  pm: ProgramMemory = { root: {}, pendingMemory: {} }
+  pm: ProgramMemory = { root: {} }
 ): Promise<ProgramMemory> {
  const mockEngineCommandManager = new MockEngineCommandManager({
    setIsStreamReady: () => {},
@ -31,7 +64,7 @@ export async function enginelessExecutor(

 export async function executor(
  ast: Program,
-  pm: ProgramMemory = { root: {}, pendingMemory: {} }
+  pm: ProgramMemory = { root: {} }
 ): Promise<ProgramMemory> {
  const engineCommandManager = new EngineCommandManager({
    setIsStreamReady: () => {},
--- a/src/lib/theme.ts
+++ b/src/lib/theme.ts
@ -0,0 +1,23 @@
+export enum Themes {
+  Light = 'light',
+  Dark = 'dark',
+  System = 'system',
+}
+
+// Get the theme from the system settings manually
+export function getSystemTheme(): Exclude<Themes, 'system'> {
+  return typeof window !== 'undefined' && 'matchMedia' in window
+    ? window.matchMedia('(prefers-color-scheme: dark)').matches
+      ? Themes.Dark
+      : Themes.Light
+    : Themes.Light
+}
+
+// Set the theme class on the body element
+export function setThemeClass(theme: Themes) {
+  if (theme === Themes.Dark) {
+    document.body.classList.add('dark')
+  } else {
+    document.body.classList.remove('dark')
+  }
+}
--- a/src/machines/authMachine.ts
+++ b/src/machines/authMachine.ts
@ -1,6 +1,24 @@
 import { createMachine, assign } from 'xstate'
 import { Models } from '@kittycad/lib'
 import withBaseURL from '../lib/withBaseURL'
+import { CommandBarMeta } from '../lib/commands'
+
+const SKIP_AUTH =
+  import.meta.env.VITE_KC_SKIP_AUTH === 'true' && import.meta.env.DEV
+const LOCAL_USER: Models['User_type'] = {
+  id: '8675309',
+  name: 'Test User',
+  email: 'kittycad.sidebar.test@example.com',
+  image: 'https://placekitten.com/200/200',
+  created_at: 'yesteryear',
+  updated_at: 'today',
+  company: 'Test Company',
+  discord: 'Test User#1234',
+  github: 'testuser',
+  phone: '555-555-5555',
+  first_name: 'Test',
+  last_name: 'User',
+}

 export interface UserContext {
  user?: Models['User_type']
@ -9,16 +27,22 @@ export interface UserContext {

 export type Events =
  | {
-      type: 'logout'
+      type: 'Log out'
    }
  | {
-      type: 'tryLogin'
+      type: 'Log in'
      token?: string
    }

 export const TOKEN_PERSIST_KEY = 'TOKEN_PERSIST_KEY'
 const persistedToken = localStorage?.getItem(TOKEN_PERSIST_KEY) || ''

+export const authCommandBarMeta: CommandBarMeta = {
+  'Log in': {
+    hide: 'both',
+  },
+}
+
 export const authMachine = createMachine<UserContext, Events>(
  {
    id: 'Auth',
@ -50,7 +74,7 @@ export const authMachine = createMachine<UserContext, Events>(
      loggedIn: {
        entry: ['goToIndexPage'],
        on: {
-          logout: {
+          'Log out': {
            target: 'loggedOut',
          },
        },
@ -58,10 +82,10 @@ export const authMachine = createMachine<UserContext, Events>(
      loggedOut: {
        entry: ['goToSignInPage'],
        on: {
-          tryLogin: {
+          'Log in': {
            target: 'checkIfLoggedIn',
            actions: assign({
-              token: (context, event) => {
+              token: (_, event) => {
                const token = event.token || ''
                localStorage.setItem(TOKEN_PERSIST_KEY, token)
                return token
@ -71,10 +95,12 @@ export const authMachine = createMachine<UserContext, Events>(
        },
      },
    },
-    schema: { events: {} as { type: 'logout' } | { type: 'tryLogin' } },
+    schema: { events: {} as { type: 'Log out' } | { type: 'Log in' } },
    predictableActionArguments: true,
    preserveActionOrder: true,
-    context: { token: persistedToken },
+    context: {
+      token: persistedToken,
+    },
  },
  {
    actions: {},
@ -91,12 +117,17 @@ async function getUser(context: UserContext) {
  }
  if (!context.token && '__TAURI__' in window) throw 'not log in'
  if (context.token) headers['Authorization'] = `Bearer ${context.token}`
-  const response = await fetch(url, {
-    method: 'GET',
-    credentials: 'include',
-    headers,
-  })
-  const user = await response.json()
-  if ('error_code' in user) throw new Error(user.message)
-  return user
+  if (SKIP_AUTH) return LOCAL_USER
+  try {
+    const response = await fetch(url, {
+      method: 'GET',
+      credentials: 'include',
+      headers,
+    })
+    const user = await response.json()
+    if ('error_code' in user) throw new Error(user.message)
+    return user
+  } catch (e) {
+    console.error(e)
+  }
 }
--- a/src/machines/homeMachine.ts
+++ b/src/machines/homeMachine.ts
@ -0,0 +1,218 @@
+import { assign, createMachine } from 'xstate'
+import { ProjectWithEntryPointMetadata } from '../Router'
+import { CommandBarMeta } from '../lib/commands'
+
+export const homeCommandMeta: CommandBarMeta = {
+  'Create project': {
+    displayValue: (args: string[]) => `Create project "${args[0]}"`,
+    args: [
+      {
+        name: 'name',
+        type: 'string',
+        description: '(default)',
+        options: 'defaultProjectName',
+      },
+    ],
+  },
+  'Open project': {
+    displayValue: (args: string[]) => `Open project "${args[0]}"`,
+    args: [
+      {
+        name: 'name',
+        type: 'select',
+        options: 'projects',
+      },
+    ],
+  },
+  'Delete project': {
+    displayValue: (args: string[]) => `Delete project "${args[0]}"`,
+    args: [
+      {
+        name: 'name',
+        type: 'select',
+        options: 'projects',
+      },
+    ],
+  },
+  'Rename project': {
+    displayValue: (args: string[]) =>
+      `Rename project "${args[0]}" to "${args[1]}"`,
+    args: [
+      {
+        name: 'oldName',
+        type: 'select',
+        options: 'projects',
+      },
+      {
+        name: 'newName',
+        type: 'string',
+        description: '(default)',
+        options: 'defaultProjectName',
+      },
+    ],
+  },
+  assign: {
+    hide: 'both',
+  },
+}
+
+export const homeMachine = createMachine(
+  {
+    /** @xstate-layout N4IgpgJg5mDOIC5QAkD2BbMACdBDAxgBYCWAdmAHTK6xampYAOATqgFZj4AusAxAMLMwuLthbtOXANoAGALqJQjVLGJdiqUopAAPRAHYAbPooAWABwBGUwE5zAJgeGArM-MAaEAE9EN0wGYKGX97GX1nGVNDS0MbfwBfeM80TBwCEnIqGiZWDm4+ACUwUlxU8TzpeW1lVXVNbT0EcJNg02d-fzt7fU77Tx8EQ0iKCPtnfUsjGRtLGXtE5IxsPCIySmpacsk+QWFRHIluWQUkEBq1DS1TxqN7ChjzOxtXf0t7a37EcwsRibH-ZzRezA8wLEApZbpNZZTa5ba8AAiYAANmB9lsjlVTuc6ldQDdDOYKP5bm0os5TDJDJ8mlEzPpzIZHA4bO9umCIWlVpkNgcKnwAPKMYp8yTHaoqC71a6IEmBUz6BkWZzWDq2Uw0qzOIJAwz+PXWfSmeZJcFLLkZSi7ERkKCi7i8CCaShkABuqAA1pR8EIRGAALQYyonJSS3ENRDA2wUeyvd6dPVhGw0-RhGOp8IA8xGFkc80rS0Ua3qUh2oO8MDMVjMCiMZEiABmqGY6AoPr2AaD4uxYcuEYQoQpQWNNjsMnMgLGKbT3TC7TcOfsNjzqQL0KKJXQtvtXEdzoobs9lCEm87cMxIbOvel+MQqtMQRmS5ks31sZpAUsZkcIX+cQZJIrpC3KUBupTbuWlbVrW9ZcE2LYUCepRnocwYSrUfYyggbzvBQ+jMq49imLYwTUt4iCft+5i-u0-7UfoQEWtCSKoiWZbnruTqZIeXoUBAKJoihFTdqGGE3rod7UdqsQTI8hiGAqrIauRA7RvYeoqhO1jtAqjFrpkLFohBHEVlWzYwY2zatvxrFCWKWKiVKeISdh4yBJE-jGs4fhhA4zg0kRNgxhplhaW0nn4XpUKZEUuAQMZqF8FxLqkO6vG+hAgYcbAIlXmJzmNERdy0RYNiKgpthxDSEU6q8MSTJYjWGFFIEULF8WljuSX7jxx7CJlQY5ZYl44pht4IP61gyPc8njt0lIuH51UKrVVITEyMy2C1hbtQl-KmdBdaWQhGVZYluWjeJjSTf402shMEyuEyljPAFL0UNmMiuN86lWHMiSmvQ-HwKcnL6WA6FOf2k3mESMRDA4RpUm4U4qf6gSEt0QIvvqfjOCaiyrtF6zZPQXWQ+GWFlUEsbmNMf1TV9NLeXDcqRIySnNaaYPEzC5M9vl-b+IyFCjupryPF9jKWP5Kks-cbMWLERHRNt0LFntkgU2NLk4dqsz43YsTK++Kk2C+MbTOOcxzOMrhqzFxTgZ1Qba1dd6BUE1jGsLMxxK9KlDNqm3tMLUQvqYlgO5QhlsTubsFXesTTUuPTfHExshDS0RftRftGgEnTZtHbX9Zr+QJ-2S4Y3qnmTC+4tMyp1EfeOnmeQqdOhyXQrFOXXCV1hCkmLDOnBJYvRRDSsyRzGjiKj0lKdAkANAA */
+    id: 'Home machine',
+
+    initial: 'Reading projects',
+
+    context: {
+      projects: [] as ProjectWithEntryPointMetadata[],
+      defaultProjectName: '',
+      defaultDirectory: '',
+    },
+
+    on: {
+      assign: {
+        actions: assign((_, event) => ({
+          ...event.data,
+        })),
+        target: '.Reading projects',
+      },
+    },
+    states: {
+      'Has no projects': {
+        on: {
+          'Create project': {
+            target: 'Creating project',
+          },
+        },
+      },
+
+      'Has projects': {
+        on: {
+          'Rename project': {
+            target: 'Renaming project',
+          },
+
+          'Create project': {
+            target: 'Creating project',
+          },
+
+          'Delete project': {
+            target: 'Deleting project',
+          },
+
+          'Open project': {
+            target: 'Opening project',
+          },
+        },
+      },
+
+      'Creating project': {
+        invoke: {
+          id: 'create-project',
+          src: 'createProject',
+          onDone: [
+            {
+              target: 'Reading projects',
+              actions: ['toastSuccess'],
+            },
+          ],
+          onError: [
+            {
+              target: 'Reading projects',
+              actions: ['toastError'],
+            },
+          ],
+        },
+      },
+
+      'Renaming project': {
+        invoke: {
+          id: 'rename-project',
+          src: 'renameProject',
+          onDone: [
+            {
+              target: '#Home machine.Reading projects',
+              actions: ['toastSuccess'],
+            },
+          ],
+          onError: [
+            {
+              target: '#Home machine.Reading projects',
+              actions: ['toastError'],
+            },
+          ],
+        },
+      },
+
+      'Deleting project': {
+        invoke: {
+          id: 'delete-project',
+          src: 'deleteProject',
+          onDone: [
+            {
+              actions: ['toastSuccess'],
+              target: '#Home machine.Reading projects',
+            },
+          ],
+          onError: {
+            actions: ['toastError'],
+            target: '#Home machine.Has projects',
+          },
+        },
+      },
+
+      'Reading projects': {
+        invoke: {
+          id: 'read-projects',
+          src: 'readProjects',
+          onDone: [
+            {
+              cond: 'Has at least 1 project',
+              target: 'Has projects',
+              actions: ['setProjects'],
+            },
+            {
+              target: 'Has no projects',
+              actions: ['setProjects'],
+            },
+          ],
+          onError: [
+            {
+              target: 'Has no projects',
+              actions: ['toastError'],
+            },
+          ],
+        },
+      },
+
+      'Opening project': {
+        entry: ['navigateToProject'],
+      },
+    },
+
+    schema: {
+      events: {} as
+        | { type: 'Open project'; data: { name: string } }
+        | { type: 'Rename project'; data: { oldName: string; newName: string } }
+        | { type: 'Create project'; data: { name: string } }
+        | { type: 'Delete project'; data: { name: string } }
+        | { type: 'navigate'; data: { name: string } }
+        | {
+            type: 'done.invoke.read-projects'
+            data: ProjectWithEntryPointMetadata[]
+          }
+        | { type: 'assign'; data: { [key: string]: any } },
+    },
+
+    predictableActionArguments: true,
+    preserveActionOrder: true,
+    tsTypes: {} as import('./homeMachine.typegen').Typegen0,
+  },
+  {
+    actions: {
+      setProjects: assign((_, event) => {
+        return { projects: event.data as ProjectWithEntryPointMetadata[] }
+      }),
+    },
+  }
+)
--- a/src/machines/homeMachine.typegen.ts
+++ b/src/machines/homeMachine.typegen.ts
@ -0,0 +1,99 @@
+// This file was automatically generated. Edits will be overwritten
+
+export interface Typegen0 {
+  '@@xstate/typegen': true
+  internalEvents: {
+    'done.invoke.create-project': {
+      type: 'done.invoke.create-project'
+      data: unknown
+      __tip: 'See the XState TS docs to learn how to strongly type this.'
+    }
+    'done.invoke.delete-project': {
+      type: 'done.invoke.delete-project'
+      data: unknown
+      __tip: 'See the XState TS docs to learn how to strongly type this.'
+    }
+    'done.invoke.read-projects': {
+      type: 'done.invoke.read-projects'
+      data: unknown
+      __tip: 'See the XState TS docs to learn how to strongly type this.'
+    }
+    'done.invoke.rename-project': {
+      type: 'done.invoke.rename-project'
+      data: unknown
+      __tip: 'See the XState TS docs to learn how to strongly type this.'
+    }
+    'error.platform.create-project': {
+      type: 'error.platform.create-project'
+      data: unknown
+    }
+    'error.platform.delete-project': {
+      type: 'error.platform.delete-project'
+      data: unknown
+    }
+    'error.platform.read-projects': {
+      type: 'error.platform.read-projects'
+      data: unknown
+    }
+    'error.platform.rename-project': {
+      type: 'error.platform.rename-project'
+      data: unknown
+    }
+    'xstate.init': { type: 'xstate.init' }
+  }
+  invokeSrcNameMap: {
+    createProject: 'done.invoke.create-project'
+    deleteProject: 'done.invoke.delete-project'
+    readProjects: 'done.invoke.read-projects'
+    renameProject: 'done.invoke.rename-project'
+  }
+  missingImplementations: {
+    actions: 'navigateToProject' | 'toastError' | 'toastSuccess'
+    delays: never
+    guards: 'Has at least 1 project'
+    services:
+      | 'createProject'
+      | 'deleteProject'
+      | 'readProjects'
+      | 'renameProject'
+  }
+  eventsCausingActions: {
+    navigateToProject: 'Open project'
+    setProjects: 'done.invoke.read-projects'
+    toastError:
+      | 'error.platform.create-project'
+      | 'error.platform.delete-project'
+      | 'error.platform.read-projects'
+      | 'error.platform.rename-project'
+    toastSuccess:
+      | 'done.invoke.create-project'
+      | 'done.invoke.delete-project'
+      | 'done.invoke.rename-project'
+  }
+  eventsCausingDelays: {}
+  eventsCausingGuards: {
+    'Has at least 1 project': 'done.invoke.read-projects'
+  }
+  eventsCausingServices: {
+    createProject: 'Create project'
+    deleteProject: 'Delete project'
+    readProjects:
+      | 'assign'
+      | 'done.invoke.create-project'
+      | 'done.invoke.delete-project'
+      | 'done.invoke.rename-project'
+      | 'error.platform.create-project'
+      | 'error.platform.rename-project'
+      | 'xstate.init'
+    renameProject: 'Rename project'
+  }
+  matchesStates:
+    | 'Creating project'
+    | 'Deleting project'
+    | 'Has no projects'
+    | 'Has projects'
+    | 'Opening project'
+    | 'Reading projects'
+    | 'Renaming project'
+  tags: never
+}
--- a/src/machines/settingsMachine.ts
+++ b/src/machines/settingsMachine.ts
@ -0,0 +1,207 @@
+import { assign, createMachine } from 'xstate'
+import { BaseUnit, baseUnitsUnion } from '../useStore'
+import { CommandBarMeta } from '../lib/commands'
+import { Themes, getSystemTheme, setThemeClass } from '../lib/theme'
+
+export enum UnitSystem {
+  Imperial = 'imperial',
+  Metric = 'metric',
+}
+
+export const SETTINGS_PERSIST_KEY = 'SETTINGS_PERSIST_KEY'
+
+export const settingsCommandBarMeta: CommandBarMeta = {
+  'Set Theme': {
+    displayValue: (args: string[]) => 'Change the app theme',
+    args: [
+      {
+        name: 'theme',
+        type: 'select',
+        defaultValue: 'theme',
+        options: Object.values(Themes).map((v) => ({ name: v })) as {
+          name: string
+        }[],
+      },
+    ],
+  },
+  'Set Default Project Name': {
+    displayValue: (args: string[]) => 'Set a new default project name',
+    hide: 'web',
+    args: [
+      {
+        name: 'defaultProjectName',
+        type: 'string',
+        description: '(default)',
+        defaultValue: 'defaultProjectName',
+        options: 'defaultProjectName',
+      },
+    ],
+  },
+  'Set Default Directory': {
+    hide: 'both',
+  },
+  'Set Unit System': {
+    displayValue: (args: string[]) => 'Set your default unit system',
+    args: [
+      {
+        name: 'unitSystem',
+        type: 'select',
+        defaultValue: 'unitSystem',
+        options: [{ name: UnitSystem.Imperial }, { name: UnitSystem.Metric }],
+      },
+    ],
+  },
+  'Set Base Unit': {
+    displayValue: (args: string[]) => 'Set your default base unit',
+    args: [
+      {
+        name: 'baseUnit',
+        type: 'select',
+        defaultValue: 'baseUnit',
+        options: Object.values(baseUnitsUnion).map((v) => ({ name: v })),
+      },
+    ],
+  },
+  'Set Onboarding Status': {
+    hide: 'both',
+  },
+}
+
+export const settingsMachine = createMachine(
+  {
+    /** @xstate-layout N4IgpgJg5mDOIC5QGUwBc0EsB2VYDpMIAbMAYlTQAIAVACzAFswBtABgF1FQAHAe1iYsfbNxAAPRAA42+AEwB2KQFYAzGznKAnADZli1QBoQAT2kBGKfm37lOned3nzqgL6vjlLLgJFSFdCoAETAAMwBDAFdiagAFACc+ACswAGNqADlw5nYuJBB+QWFRfMkEABY5fDYa2rra83LjMwQdLWV8BXLyuxlVLU1Ld090bzxCEnJKYLComODMeLS0PniTXLFCoUwRMTK7fC1zNql7NgUjtnKjU0RlBSqpLVUVPVUda60tYZAvHHG-FNAgBVbBCKjIEywNBMDb5LbFPaILqdfRSORsS4qcxXZqIHqyK6qY4XOxsGTKco-P4+Cb+aYAIXCsDAVFBQjhvAE212pWkskUKnUml0+gUNxaqkU+EccnKF1UCnucnMcjcHl+o3+vkmZBofCgUFIMwARpEoFRYuFsGBiJyCtzEXzWrJlGxlKdVFKvfY1XiEBjyvhVOVzBdzu13pYFNStbTAQFqAB5bAmvjheIQf4QtDhNCRWD2hE7EqgfayHTEh7lHQNSxSf1Scz4cpHHFyFVujTKczuDXYPgQOBiGl4TaOktIhAAWg6X3nC4Xp39050sYw2rpYHHRUnztVhPJqmUlIGbEriv9WhrLZ6uibHcqUr7riAA */
+    id: 'Settings',
+    predictableActionArguments: true,
+    context: {
+      theme: Themes.System,
+      defaultProjectName: '',
+      unitSystem: UnitSystem.Imperial,
+      baseUnit: 'in' as BaseUnit,
+      defaultDirectory: '',
+      showDebugPanel: false,
+      onboardingStatus: '',
+    },
+    initial: 'idle',
+    states: {
+      idle: {
+        entry: ['setThemeClass'],
+        on: {
+          'Set Theme': {
+            actions: [
+              assign({
+                theme: (_, event) => event.data.theme,
+              }),
+              'persistSettings',
+              'toastSuccess',
+              'setThemeClass',
+            ],
+            target: 'idle',
+            internal: true,
+          },
+          'Set Default Project Name': {
+            actions: [
+              assign({
+                defaultProjectName: (_, event) => event.data.defaultProjectName,
+              }),
+              'persistSettings',
+              'toastSuccess',
+            ],
+            target: 'idle',
+            internal: true,
+          },
+          'Set Default Directory': {
+            actions: [
+              assign({
+                defaultDirectory: (_, event) => event.data.defaultDirectory,
+              }),
+              'persistSettings',
+              'toastSuccess',
+            ],
+            target: 'idle',
+            internal: true,
+          },
+          'Set Unit System': {
+            actions: [
+              assign({
+                unitSystem: (_, event) => event.data.unitSystem,
+                baseUnit: (_, event) =>
+                  event.data.unitSystem === 'imperial' ? 'in' : 'mm',
+              }),
+              'persistSettings',
+              'toastSuccess',
+            ],
+            target: 'idle',
+            internal: true,
+          },
+          'Set Base Unit': {
+            actions: [
+              assign({ baseUnit: (_, event) => event.data.baseUnit }),
+              'persistSettings',
+              'toastSuccess',
+            ],
+            target: 'idle',
+            internal: true,
+          },
+          'Toggle Debug Panel': {
+            actions: [
+              assign({
+                showDebugPanel: (context) => {
+                  return !context.showDebugPanel
+                },
+              }),
+              'persistSettings',
+              'toastSuccess',
+            ],
+            target: 'idle',
+            internal: true,
+          },
+          'Set Onboarding Status': {
+            actions: [
+              assign({
+                onboardingStatus: (_, event) => event.data.onboardingStatus,
+              }),
+              'persistSettings',
+            ],
+            target: 'idle',
+            internal: true,
+          },
+        },
+      },
+    },
+    tsTypes: {} as import('./settingsMachine.typegen').Typegen0,
+    schema: {
+      events: {} as
+        | { type: 'Set Theme'; data: { theme: Themes } }
+        | {
+            type: 'Set Default Project Name'
+            data: { defaultProjectName: string }
+          }
+        | { type: 'Set Default Directory'; data: { defaultDirectory: string } }
+        | {
+            type: 'Set Unit System'
+            data: { unitSystem: UnitSystem }
+          }
+        | { type: 'Set Base Unit'; data: { baseUnit: BaseUnit } }
+        | { type: 'Set Onboarding Status'; data: { onboardingStatus: string } }
+        | { type: 'Toggle Debug Panel' },
+    },
+  },
+  {
+    actions: {
+      persistSettings: (context) => {
+        try {
+          localStorage.setItem(SETTINGS_PERSIST_KEY, JSON.stringify(context))
+        } catch (e) {
+          console.error(e)
+        }
+      },
+      setThemeClass: (context, event) => {
+        const currentTheme =
+          event.type === 'Set Theme' ? event.data.theme : context.theme
+        setThemeClass(
+          currentTheme === Themes.System ? getSystemTheme() : currentTheme
+        )
+      },
+    },
+  }
+)
--- a/src/machines/settingsMachine.typegen.ts
+++ b/src/machines/settingsMachine.typegen.ts
@ -0,0 +1,46 @@
+// This file was automatically generated. Edits will be overwritten
+
+export interface Typegen0 {
+  '@@xstate/typegen': true
+  internalEvents: {
+    'xstate.init': { type: 'xstate.init' }
+  }
+  invokeSrcNameMap: {}
+  missingImplementations: {
+    actions: 'toastSuccess'
+    delays: never
+    guards: never
+    services: never
+  }
+  eventsCausingActions: {
+    persistSettings:
+      | 'Set Base Unit'
+      | 'Set Default Directory'
+      | 'Set Default Project Name'
+      | 'Set Onboarding Status'
+      | 'Set Theme'
+      | 'Set Unit System'
+      | 'Toggle Debug Panel'
+    setThemeClass:
+      | 'Set Base Unit'
+      | 'Set Default Directory'
+      | 'Set Default Project Name'
+      | 'Set Onboarding Status'
+      | 'Set Theme'
+      | 'Set Unit System'
+      | 'Toggle Debug Panel'
+      | 'xstate.init'
+    toastSuccess:
+      | 'Set Base Unit'
+      | 'Set Default Directory'
+      | 'Set Default Project Name'
+      | 'Set Theme'
+      | 'Set Unit System'
+      | 'Toggle Debug Panel'
+  }
+  eventsCausingDelays: {}
+  eventsCausingGuards: {}
+  eventsCausingServices: {}
+  matchesStates: 'idle'
+  tags: never
+}
--- a/src/routes/Home.tsx
+++ b/src/routes/Home.tsx
@ -1,93 +1,139 @@
-import { FormEvent, useCallback, useEffect, useState } from 'react'
-import { readDir, removeDir, renameFile } from '@tauri-apps/api/fs'
+import { FormEvent, useEffect } from 'react'
+import { removeDir, renameFile } from '@tauri-apps/api/fs'
 import {
  createNewProject,
  getNextProjectIndex,
  interpolateProjectNameWithIndex,
  doesProjectNameNeedInterpolated,
-  isProjectDirectory,
-  PROJECT_ENTRYPOINT,
+  getProjectsInDir,
 } from '../lib/tauriFS'
 import { ActionButton } from '../components/ActionButton'
-import {
-  faArrowDown,
-  faArrowUp,
-  faCircleDot,
-  faPlus,
-} from '@fortawesome/free-solid-svg-icons'
-import { useStore } from '../useStore'
+import { faArrowDown, faPlus } from '@fortawesome/free-solid-svg-icons'
 import { toast } from 'react-hot-toast'
 import { AppHeader } from '../components/AppHeader'
 import ProjectCard from '../components/ProjectCard'
-import { useLoaderData, useSearchParams } from 'react-router-dom'
+import { useLoaderData, useNavigate, useSearchParams } from 'react-router-dom'
 import { Link } from 'react-router-dom'
 import { ProjectWithEntryPointMetadata, HomeLoaderData } from '../Router'
 import Loading from '../components/Loading'
-import { metadata } from 'tauri-plugin-fs-extra-api'
-
-const DESC = ':desc'
+import { useMachine } from '@xstate/react'
+import { homeCommandMeta, homeMachine } from '../machines/homeMachine'
+import { ContextFrom, EventFrom } from 'xstate'
+import { paths } from '../Router'
+import {
+  getNextSearchParams,
+  getSortFunction,
+  getSortIcon,
+} from '../lib/sorting'
+import useStateMachineCommands from '../hooks/useStateMachineCommands'
+import { useGlobalStateContext } from 'hooks/useGlobalStateContext'
+import { useCommandsContext } from 'hooks/useCommandsContext'

 // This route only opens in the Tauri desktop context for now,
 // as defined in Router.tsx, so we can use the Tauri APIs and types.
 const Home = () => {
-  const [searchParams, setSearchParams] = useSearchParams()
-  const sort = searchParams.get('sort_by') ?? 'modified:desc'
+  const { commands, setCommandBarOpen } = useCommandsContext()
+  const navigate = useNavigate()
  const { projects: loadedProjects } = useLoaderData() as HomeLoaderData
-  const [isLoading, setIsLoading] = useState(true)
-  const [projects, setProjects] = useState(loadedProjects || [])
-  const { defaultDir, defaultProjectName } = useStore((s) => ({
-    defaultDir: s.defaultDir,
-    defaultProjectName: s.defaultProjectName,
-  }))
+  const {
+    settings: {
+      context: { defaultDirectory, defaultProjectName },
+    },
+  } = useGlobalStateContext()

-  const modifiedSelected = sort?.includes('modified') || !sort || sort === null
+  const [state, send] = useMachine(homeMachine, {
+    context: {
+      projects: loadedProjects,
+      defaultProjectName,
+      defaultDirectory,
+    },
+    actions: {
+      navigateToProject: (
+        context: ContextFrom<typeof homeMachine>,
+        event: EventFrom<typeof homeMachine>
+      ) => {
+        if (event.data && 'name' in event.data) {
+          setCommandBarOpen(false)
+          navigate(
+            `${paths.FILE}/${encodeURIComponent(
+              context.defaultDirectory + '/' + event.data.name
+            )}`
+          )
+        }
+      },
+      toastSuccess: (_, event) => toast.success((event.data || '') + ''),
+      toastError: (_, event) => toast.error((event.data || '') + ''),
+    },
+    services: {
+      readProjects: async (context: ContextFrom<typeof homeMachine>) =>
+        getProjectsInDir(context.defaultDirectory),
+      createProject: async (
+        context: ContextFrom<typeof homeMachine>,
+        event: EventFrom<typeof homeMachine, 'Create project'>
+      ) => {
+        let name =
+          event.data && 'name' in event.data
+            ? event.data.name
+            : defaultProjectName
+        if (doesProjectNameNeedInterpolated(name)) {
+          const nextIndex = await getNextProjectIndex(name, projects)
+          name = interpolateProjectNameWithIndex(name, nextIndex)
+        }

-  const refreshProjects = useCallback(
-    async (projectDir = defaultDir) => {
-      const readProjects = (
-        await readDir(projectDir.dir, {
+        await createNewProject(context.defaultDirectory + '/' + name)
+        return `Successfully created "${name}"`
+      },
+      renameProject: async (
+        context: ContextFrom<typeof homeMachine>,
+        event: EventFrom<typeof homeMachine, 'Rename project'>
+      ) => {
+        const { oldName, newName } = event.data
+        let name = newName ? newName : context.defaultProjectName
+        if (doesProjectNameNeedInterpolated(name)) {
+          const nextIndex = await getNextProjectIndex(name, projects)
+          name = interpolateProjectNameWithIndex(name, nextIndex)
+        }
+
+        await renameFile(
+          context.defaultDirectory + '/' + oldName,
+          context.defaultDirectory + '/' + name
+        )
+        return `Successfully renamed "${oldName}" to "${name}"`
+      },
+      deleteProject: async (
+        context: ContextFrom<typeof homeMachine>,
+        event: EventFrom<typeof homeMachine, 'Delete project'>
+      ) => {
+        await removeDir(context.defaultDirectory + '/' + event.data.name, {
          recursive: true,
        })
-      ).filter(isProjectDirectory)
-
-      const projectsWithMetadata = await Promise.all(
-        readProjects.map(async (p) => ({
-          entrypoint_metadata: await metadata(
-            p.path + '/' + PROJECT_ENTRYPOINT
-          ),
-          ...p,
-        }))
-      )
-
-      setProjects(projectsWithMetadata)
+        return `Successfully deleted "${event.data.name}"`
+      },
    },
-    [defaultDir, setProjects]
-  )
+    guards: {
+      'Has at least 1 project': (_, event: EventFrom<typeof homeMachine>) => {
+        if (event.type !== 'done.invoke.read-projects') return false
+        return event?.data?.length ? event.data?.length >= 1 : false
+      },
+    },
+  })
+  const { projects } = state.context
+  const [searchParams, setSearchParams] = useSearchParams()
+  const sort = searchParams.get('sort_by') ?? 'modified:desc'
+
+  const isSortByModified = sort?.includes('modified') || !sort || sort === null
+
+  useStateMachineCommands<typeof homeMachine>({
+    commands,
+    send,
+    state,
+    commandBarMeta: homeCommandMeta,
+    owner: 'home',
+  })

  useEffect(() => {
-    refreshProjects(defaultDir).then(() => {
-      setIsLoading(false)
-    })
-  }, [setIsLoading, refreshProjects, defaultDir])
-
-  async function handleNewProject() {
-    let projectName = defaultProjectName
-    if (doesProjectNameNeedInterpolated(projectName)) {
-      const nextIndex = await getNextProjectIndex(defaultProjectName, projects)
-      projectName = interpolateProjectNameWithIndex(
-        defaultProjectName,
-        nextIndex
-      )
-    }
-
-    await createNewProject(defaultDir.dir + '/' + projectName).catch((err) => {
-      console.error('Error creating project:', err)
-      toast.error('Error creating project')
-    })
-
-    await refreshProjects()
-    toast.success('Project created')
-  }
+    send({ type: 'assign', data: { defaultProjectName, defaultDirectory } })
+  }, [defaultDirectory, defaultProjectName, send])

  async function handleRenameProject(
    e: FormEvent<HTMLFormElement>,
@ -96,85 +142,14 @@ const Home = () => {
    const { newProjectName } = Object.fromEntries(
      new FormData(e.target as HTMLFormElement)
    )
-    if (newProjectName && project.name && newProjectName !== project.name) {
-      const dir = project.path?.slice(0, project.path?.lastIndexOf('/'))
-      await renameFile(project.path, dir + '/' + newProjectName).catch(
-        (err) => {
-          console.error('Error renaming project:', err)
-          toast.error('Error renaming project')
-        }
-      )

-      await refreshProjects()
-      toast.success('Project renamed')
-    }
+    send('Rename project', {
+      data: { oldName: project.name, newName: newProjectName },
+    })
  }

  async function handleDeleteProject(project: ProjectWithEntryPointMetadata) {
-    if (project.path) {
-      await removeDir(project.path, { recursive: true }).catch((err) => {
-        console.error('Error deleting project:', err)
-        toast.error('Error deleting project')
-      })
-
-      await refreshProjects()
-      toast.success('Project deleted')
-    }
-  }
-
-  function getSortIcon(sortBy: string) {
-    if (sort === sortBy) {
-      return faArrowUp
-    } else if (sort === sortBy + DESC) {
-      return faArrowDown
-    }
-    return faCircleDot
-  }
-
-  function getNextSearchParams(sortBy: string) {
-    if (sort === null || !sort)
-      return { sort_by: sortBy + (sortBy !== 'modified' ? DESC : '') }
-    if (sort.includes(sortBy) && !sort.includes(DESC)) return { sort_by: '' }
-    return {
-      sort_by: sortBy + (sort.includes(DESC) ? '' : DESC),
-    }
-  }
-
-  function getSortFunction(sortBy: string) {
-    const sortByName = (
-      a: ProjectWithEntryPointMetadata,
-      b: ProjectWithEntryPointMetadata
-    ) => {
-      if (a.name && b.name) {
-        return sortBy.includes('desc')
-          ? a.name.localeCompare(b.name)
-          : b.name.localeCompare(a.name)
-      }
-      return 0
-    }
-
-    const sortByModified = (
-      a: ProjectWithEntryPointMetadata,
-      b: ProjectWithEntryPointMetadata
-    ) => {
-      if (
-        a.entrypoint_metadata?.modifiedAt &&
-        b.entrypoint_metadata?.modifiedAt
-      ) {
-        return !sortBy || sortBy.includes('desc')
-          ? b.entrypoint_metadata.modifiedAt.getTime() -
-              a.entrypoint_metadata.modifiedAt.getTime()
-          : a.entrypoint_metadata.modifiedAt.getTime() -
-              b.entrypoint_metadata.modifiedAt.getTime()
-      }
-      return 0
-    }
-
-    if (sortBy?.includes('name')) {
-      return sortByName
-    } else {
-      return sortByModified
-    }
+    send('Delete project', { data: { name: project.name || '' } })
  }

  return (
@ -191,9 +166,9 @@ const Home = () => {
                  ? 'text-chalkboard-80 dark:text-chalkboard-40'
                  : ''
              }
-              onClick={() => setSearchParams(getNextSearchParams('name'))}
+              onClick={() => setSearchParams(getNextSearchParams(sort, 'name'))}
              icon={{
-                icon: getSortIcon('name'),
+                icon: getSortIcon(sort, 'name'),
                bgClassName: !sort?.includes('name')
                  ? 'bg-liquid-50 dark:bg-liquid-70'
                  : '',
@ -207,17 +182,19 @@ const Home = () => {
            <ActionButton
              Element="button"
              className={
-                !modifiedSelected
+                !isSortByModified
                  ? 'text-chalkboard-80 dark:text-chalkboard-40'
                  : ''
              }
-              onClick={() => setSearchParams(getNextSearchParams('modified'))}
+              onClick={() =>
+                setSearchParams(getNextSearchParams(sort, 'modified'))
+              }
              icon={{
-                icon: sort ? getSortIcon('modified') : faArrowDown,
-                bgClassName: !modifiedSelected
+                icon: sort ? getSortIcon(sort, 'modified') : faArrowDown,
+                bgClassName: !isSortByModified
                  ? 'bg-liquid-50 dark:bg-liquid-70'
                  : '',
-                iconClassName: !modifiedSelected
+                iconClassName: !isSortByModified
                  ? 'text-liquid-80 dark:text-liquid-30'
                  : '',
              }}
@ -230,11 +207,11 @@ const Home = () => {
          <p className="my-4 text-sm text-chalkboard-80 dark:text-chalkboard-30">
            Are being saved at{' '}
            <code className="text-liquid-80 dark:text-liquid-30">
-              {defaultDir.dir}
+              {defaultDirectory}
            </code>
            , which you can change in your <Link to="settings">Settings</Link>.
          </p>
-          {isLoading ? (
+          {state.matches('Reading projects') ? (
            <Loading>Loading your Projects...</Loading>
          ) : (
            <>
@ -256,7 +233,7 @@ const Home = () => {
              )}
              <ActionButton
                Element="button"
-                onClick={handleNewProject}
+                onClick={() => send('Create project')}
                icon={{ icon: faPlus }}
              >
                New file
--- a/src/routes/Onboarding/Camera.tsx
+++ b/src/routes/Onboarding/Camera.tsx
@ -20,9 +20,25 @@ export default function Units() {
      >
        <h1 className="text-2xl font-bold">Camera</h1>
        <p className="mt-6">
-          Moving the camera is easy. Just click and drag anywhere in the scene
-          to rotate the camera, or hold down the <kbd>Ctrl</kbd> key and drag to
-          pan the camera.
+          Moving the camera is easy! The controls are as you might expect:
+        </p>
+        <ul className="list-disc list-outside ms-8 mb-4">
+          <li>Click and drag anywhere in the scene to rotate the camera</li>
+          <li>
+            Hold down the <kbd>Shift</kbd> key while clicking and dragging to
+            pan the camera
+          </li>
+          <li>
+            Hold down the <kbd>Ctrl</kbd> key while dragging to zoom. You can
+            also use the scroll wheel to zoom in and out.
+          </li>
+        </ul>
+        <p>
+          What you're seeing here is just a video, and your interactions are
+          being sent to our Geometry Engine API, which sends back video frames
+          in real time. How cool is that? It means that you can use KittyCAD
+          Modeling App (or whatever you want to build) on any device, even a
+          cheap laptop with no graphics card!
        </p>
        <div className="flex justify-between mt-6">
          <ActionButton
--- a/src/routes/Onboarding/Units.tsx
+++ b/src/routes/Onboarding/Units.tsx
@ -1,34 +1,21 @@
 import { faArrowRight, faXmark } from '@fortawesome/free-solid-svg-icons'
-import { baseUnits, useStore } from '../../useStore'
+import { BaseUnit, baseUnits } from '../../useStore'
 import { ActionButton } from '../../components/ActionButton'
 import { SettingsSection } from '../Settings'
 import { Toggle } from '../../components/Toggle/Toggle'
-import { useState } from 'react'
 import { onboardingPaths, useDismiss, useNextClick } from '.'
+import { useGlobalStateContext } from 'hooks/useGlobalStateContext'
+import { UnitSystem } from 'machines/settingsMachine'

 export default function Units() {
  const dismiss = useDismiss()
  const next = useNextClick(onboardingPaths.CAMERA)
  const {
-    defaultUnitSystem: ogDefaultUnitSystem,
-    setDefaultUnitSystem: saveDefaultUnitSystem,
-    defaultBaseUnit: ogDefaultBaseUnit,
-    setDefaultBaseUnit: saveDefaultBaseUnit,
-  } = useStore((s) => ({
-    defaultUnitSystem: s.defaultUnitSystem,
-    setDefaultUnitSystem: s.setDefaultUnitSystem,
-    defaultBaseUnit: s.defaultBaseUnit,
-    setDefaultBaseUnit: s.setDefaultBaseUnit,
-  }))
-  const [defaultUnitSystem, setDefaultUnitSystem] =
-    useState(ogDefaultUnitSystem)
-  const [defaultBaseUnit, setDefaultBaseUnit] = useState(ogDefaultBaseUnit)
-
-  function handleNextClick() {
-    saveDefaultUnitSystem(defaultUnitSystem)
-    saveDefaultBaseUnit(defaultBaseUnit)
-    next()
-  }
+    settings: {
+      send,
+      context: { unitSystem, baseUnit },
+    },
+  } = useGlobalStateContext()

  return (
    <div className="fixed grid place-content-center inset-0 bg-chalkboard-110/50 z-50">
@ -42,10 +29,16 @@ export default function Units() {
            offLabel="Imperial"
            onLabel="Metric"
            name="settings-units"
-            checked={defaultUnitSystem === 'metric'}
-            onChange={(e) =>
-              setDefaultUnitSystem(e.target.checked ? 'metric' : 'imperial')
-            }
+            checked={unitSystem === UnitSystem.Metric}
+            onChange={(e) => {
+              const newUnitSystem = e.target.checked
+                ? UnitSystem.Metric
+                : UnitSystem.Imperial
+              send({
+                type: 'Set Unit System',
+                data: { unitSystem: newUnitSystem },
+              })
+            }}
          />
        </SettingsSection>
        <SettingsSection
@ -55,10 +48,15 @@ export default function Units() {
          <select
            id="base-unit"
            className="block w-full px-3 py-1 border border-chalkboard-30 bg-transparent"
-            value={defaultBaseUnit}
-            onChange={(e) => setDefaultBaseUnit(e.target.value)}
+            value={baseUnit}
+            onChange={(e) => {
+              send({
+                type: 'Set Base Unit',
+                data: { baseUnit: e.target.value as BaseUnit },
+              })
+            }}
          >
-            {baseUnits[defaultUnitSystem].map((unit) => (
+            {baseUnits[unitSystem].map((unit) => (
              <option key={unit} value={unit}>
                {unit}
              </option>
@ -81,7 +79,7 @@ export default function Units() {
          </ActionButton>
          <ActionButton
            Element="button"
-            onClick={handleNextClick}
+            onClick={next}
            icon={{ icon: faArrowRight }}
          >
            Next: Camera
--- a/Show More
+++ b/Show More