Remove unused snapshots diff steps

* Add brake disc.

* Update kcl-samples simulation test output

* Update public/kcl-samples/brake-rotor/main.kcl

Co-authored-by: Adam Chalmers <adam.chalmers@zoo.dev>

* Update public/kcl-samples/brake-rotor/main.kcl

Co-authored-by: Adam Chalmers <adam.chalmers@zoo.dev>

* updates

Signed-off-by: Jess Frazelle <github@jessfraz.com>

---------

Signed-off-by: Jess Frazelle <github@jessfraz.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Adam Chalmers <adam.chalmers@zoo.dev>
Co-authored-by: Jess Frazelle <jessfraz@users.noreply.github.com>
Co-authored-by: Jess Frazelle <github@jessfraz.com>

.github/workflows/cargo-test.yml

@@ -88,6 +88,7 @@ jobs:
           KITTYCAD_API_TOKEN: ${{secrets.KITTYCAD_API_TOKEN_DEV}}
           ZOO_HOST: https://api.dev.zoo.dev
           RUST_BACKTRACE: full
+          RUST_MIN_STACK: 10485760000
       - name: Commit differences
         if: steps.path-changes.outputs.outside-kcl-samples == 'false' && steps.cargo-test-kcl-samples.outcome == 'failure'
         shell: bash
@@ -119,6 +120,7 @@ jobs:
           # Configure nextest when it's run by insta (via just).
           NEXTEST_PROFILE: ci
           RUST_BACKTRACE: full
+          RUST_MIN_STACK: 10485760000
       - name: Build and archive tests
         run: |
           cd rust
@@ -182,6 +184,7 @@ jobs:
         env:
           KITTYCAD_API_TOKEN: ${{secrets.KITTYCAD_API_TOKEN_DEV}}
           ZOO_HOST: https://api.dev.zoo.dev
+          RUST_MIN_STACK: 10485760000
       - name: Upload results
         if: always()
         run: .github/ci-cd-scripts/upload-results.sh
@@ -238,6 +241,7 @@ jobs:
           KITTYCAD_API_TOKEN: ${{secrets.KITTYCAD_API_TOKEN_DEV}}
           ZOO_HOST: https://api.dev.zoo.dev
           MODELING_APP_INTERNAL_SAMPLES_SECRET: ${{secrets.MODELING_APP_INTERNAL_SAMPLES_SECRET}}
+          RUST_MIN_STACK: 10485760000
   run-wasm-tests:
     name: Run wasm tests
     strategy:

.github/workflows/e2e-tests.yml

@@ -167,32 +167,6 @@ jobs:
           retention-days: 30
           overwrite: true
 
-      - name: Check diff
-        if: ${{ github.ref != 'refs/heads/main' }}
-        shell: bash
-        id: git-check
-        run: |
-            git add e2e/playwright/snapshot-tests.spec.ts-snapshots e2e/playwright/snapshots
-            if git status | grep -q "Changes to be committed"
-            then echo "modified=true" >> $GITHUB_OUTPUT
-            else echo "modified=false" >> $GITHUB_OUTPUT
-            fi
-
-      - name: Commit changes
-        if: ${{ steps.git-check.outputs.modified == 'true' }}
-        shell: bash
-        run: |
-          git add e2e/playwright/snapshot-tests.spec.ts-snapshots e2e/playwright/snapshots
-          git config --local user.email "github-actions[bot]@users.noreply.github.com"
-          git config --local user.name "github-actions[bot]"
-          git remote set-url origin https://${{ github.actor }}:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git
-          git fetch origin
-          echo ${{ github.head_ref }}
-          git checkout ${{ github.head_ref }}
-          git commit --message "Update snapshots" || true
-          git push
-          git push origin ${{ github.head_ref }}
-
   electron:
     needs: [prepare-wasm]
     timeout-minutes: 60

README.md

@@ -42,8 +42,6 @@ The 3D view in Design Studio is just a video stream from our hosted geometry eng
 
 We recommend downloading the latest application binary from our [releases](https://github.com/KittyCAD/modeling-app/releases) page. If you don't see your platform or architecture supported there, please file an issue.
 
-If you'd like to try out upcoming changes sooner, you can also download those from our [nightly releases](https://zoo.dev/modeling-app/download/nightly) page.
-
 ## Developing
 
 Finally, if you'd like to run a development build or contribute to the project, please visit our [contributor guide](CONTRIBUTING.md) to get started.

docs/kcl-lang/index.md

@@ -4,7 +4,7 @@ excerpt: "Documentation of the KCL language for the Zoo Design Studio."
 layout: manual
 ---
 
-This is a reference for KCL. If you are learning KCL, you may prefer the [guide]() which explains
+This is a reference for KCL. If you are learning KCL, you may prefer the [guide](https://zoo.dev/docs/kcl-book/intro.html) which explains
 things in a more tutorial fashion. See also our documentation of the [standard library](/docs/kcl-std).
 
 ## Topics

docs/kcl-lang/modules.md

@@ -177,7 +177,7 @@ You can also import the whole module. This is useful if you want to use the
 result of a module as a variable, like a part.
 
 ```norun
-import "tests/inputs/cube.kcl" as cube
+import "cube.kcl"
 cube
   |> translate(x=10)
 ```
@@ -241,7 +241,7 @@ If you want to have multiple instances of the same object, you can use the
 [`clone`](/docs/kcl/clone) function. This will render a new instance of the object in memory.
 
 ```norun
-import cube from "tests/inputs/cube.kcl"
+import cube from "cube.kcl"
 
 cube  
   |> translate(x=10)
@@ -257,7 +257,7 @@ separate objects in memory, and can be manipulated independently.
 Here is an example with a file from another CAD system:
 
 ```kcl
-import "tests/inputs/cube.step" as cube
+import "tests/inputs/cube.step"
 
 cube
   |> translate(x=10)

docs/kcl-std/functions/std-array-reduce.md

@@ -12,7 +12,7 @@ reduce(
   @array: [any],
   initial: any,
   f: fn(any, accum: any): any,
-): [any]
+): any
 ```
 
 Take a starting value. Then, for each element of an array, calculate the next value,
@@ -28,7 +28,7 @@ using the previous value and the element.
 
 ### Returns
 
-[`[any]`](/docs/kcl-std/types/std-types-any)
+[`any`](/docs/kcl-std/types/std-types-any)
 
 
 ### Examples

docs/kcl-std/functions/std-math-legLen.md

@@ -11,7 +11,7 @@ Compute the length of the given leg.
 legLen(
   hypotenuse: number(Length),
   leg: number(Length),
-): number(deg)
+): number(Length)
 ```
 
 
@@ -25,7 +25,7 @@ legLen(
 
 ### Returns
 
-[`number(deg)`](/docs/kcl-std/types/std-types-number) - A number.
+[`number(Length)`](/docs/kcl-std/types/std-types-number) - A number.
 
 
 ### Examples

docs/kcl-std/functions/std-sketch-patternTransform2d.md

@@ -1,19 +1,19 @@
 ---
 title: "patternTransform2d"
 subtitle: "Function in std::sketch"
-excerpt: "Just like patternTransform, but works on 2D sketches not 3D solids."
+excerpt: "Just like `patternTransform`, but works on 2D sketches not 3D solids."
 layout: manual
 ---
 
-Just like patternTransform, but works on 2D sketches not 3D solids.
+Just like `patternTransform`, but works on 2D sketches not 3D solids.
 
 ```kcl
 patternTransform2d(
-  @sketches: [Sketch],
-  instances: number,
-  transform: FunctionSource,
-  useOriginal?: bool,
-): [Sketch]
+  @sketches: [Sketch; 1+],
+  instances: number(_),
+  transform: fn(number(_)): { },
+  useOriginal?: boolean,
+): [Sketch; 1+]
 ```
 
 
@@ -22,14 +22,14 @@ patternTransform2d(
 
 | Name | Type | Description | Required |
 |----------|------|-------------|----------|
-| `sketches` | [`[Sketch]`](/docs/kcl-std/types/std-types-Sketch) | The sketch(es) to duplicate | Yes |
-| `instances` | [`number`](/docs/kcl-std/types/std-types-number) | The number of total instances. Must be greater than or equal to 1. This includes the original entity. For example, if instances is 2, there will be two copies -- the original, and one new copy. If instances is 1, this has no effect. | Yes |
-| `transform` | `FunctionSource` | How each replica should be transformed. The transform function takes a single parameter: an integer representing which number replication the transform is for. E.g. the first replica to be transformed will be passed the argument `1`. This simplifies your math: the transform function can rely on id `0` being the original instance passed into the `patternTransform`. See the examples. | Yes |
-| `useOriginal` | [`bool`](/docs/kcl-std/types/std-types-bool) | If the target was sketched on an extrusion, setting this will use the original sketch as the target, not the entire joined solid. Defaults to false. | No |
+| `sketches` | [`[Sketch; 1+]`](/docs/kcl-std/types/std-types-Sketch) | The sketch(es) to duplicate. | Yes |
+| `instances` | [`number(_)`](/docs/kcl-std/types/std-types-number) | The number of total instances. Must be greater than or equal to 1. This includes the original entity. For example, if instances is 2, there will be two copies -- the original, and one new copy. If instances is 1, this has no effect. | Yes |
+| `transform` | [`fn(number(_)): { }`](/docs/kcl-std/types/std-types-fn) | How each replica should be transformed. The transform function takes a single parameter: an integer representing which number replication the transform is for. E.g. the first replica to be transformed will be passed the argument `1`. This simplifies your math: the transform function can rely on id `0` being the original instance passed into the `patternTransform`. See the examples. | Yes |
+| `useOriginal` | `boolean` | If the target was sketched on an extrusion, setting this will use the original sketch as the target, not the entire joined solid. | No |
 
 ### Returns
 
-[`[Sketch]`](/docs/kcl-std/types/std-types-Sketch)
+[`[Sketch; 1+]`](/docs/kcl-std/types/std-types-Sketch)
 
 
 ### Examples

docs/kcl-std/functions/std-transform-mirror2d.md

@@ -14,8 +14,6 @@ mirror2d(
 ): Sketch
 ```
 
-Only works on unclosed sketches for now.
-
 Mirror occurs around a local sketch axis rather than a global axis.
 
 ### Arguments

docs/kcl-std/index.md

@@ -65,7 +65,7 @@ layout: manual
   * [`line`](/docs/kcl-std/line)
   * [`loft`](/docs/kcl-std/loft)
   * [`patternCircular2d`](/docs/kcl-std/patternCircular2d)
-  * [`patternTransform2d`](/docs/kcl-std/patternTransform2d)
+  * [`patternTransform2d`](/docs/kcl-std/functions/std-sketch-patternTransform2d)
   * [`polygon`](/docs/kcl-std/polygon)
   * [`profileStart`](/docs/kcl-std/profileStart)
   * [`profileStartX`](/docs/kcl-std/profileStartX)
@@ -94,7 +94,7 @@ layout: manual
   * [`intersect`](/docs/kcl-std/intersect)
   * [`patternCircular3d`](/docs/kcl-std/patternCircular3d)
   * [`patternLinear3d`](/docs/kcl-std/patternLinear3d)
-  * [`patternTransform`](/docs/kcl-std/patternTransform)
+  * [`patternTransform`](/docs/kcl-std/functions/std-solid-patternTransform)
   * [`shell`](/docs/kcl-std/functions/std-solid-shell)
   * [`subtract`](/docs/kcl-std/subtract)
   * [`union`](/docs/kcl-std/union)

docs/kcl-std/modules/std-sketch.md

@@ -30,7 +30,7 @@ This module contains functions for creating and manipulating sketches, and makin
 * [`line`](/docs/kcl-std/line)
 * [`loft`](/docs/kcl-std/loft)
 * [`patternCircular2d`](/docs/kcl-std/patternCircular2d)
-* [`patternTransform2d`](/docs/kcl-std/patternTransform2d)
+* [`patternTransform2d`](/docs/kcl-std/functions/std-sketch-patternTransform2d)
 * [`polygon`](/docs/kcl-std/polygon)
 * [`profileStart`](/docs/kcl-std/profileStart)
 * [`profileStartX`](/docs/kcl-std/profileStartX)

docs/kcl-std/modules/std-solid.md

@@ -18,7 +18,7 @@ This module contains functions for modifying solids, e.g., by adding a fillet or
 * [`intersect`](/docs/kcl-std/intersect)
 * [`patternCircular3d`](/docs/kcl-std/patternCircular3d)
 * [`patternLinear3d`](/docs/kcl-std/patternLinear3d)
-* [`patternTransform`](/docs/kcl-std/patternTransform)
+* [`patternTransform`](/docs/kcl-std/functions/std-solid-patternTransform)
 * [`shell`](/docs/kcl-std/functions/std-solid-shell)
 * [`subtract`](/docs/kcl-std/subtract)
 * [`union`](/docs/kcl-std/union)

docs/kcl-std/modules/std.md

@@ -11,7 +11,7 @@ Contains frequently used constants, functions for interacting with the KittyCAD
 
 The standard library is organised into modules (listed below), but most things are always available in KCL programs. 
 
-You might also want the [KCL language reference](/docs/kcl-lang) or the [KCL guide](). 
+You might also want the [KCL language reference](/docs/kcl-lang) or the [KCL guide](https://zoo.dev/docs/kcl-book/intro.html). 
 
 ## Modules
 

docs/kcl-std/patternCircular2d.md

@@ -12,8 +12,8 @@ patternCircular2d(
   @sketchSet: [Sketch],
   instances: number,
   center: Point2d,
-  arcDegrees: number,
-  rotateDuplicates: bool,
+  arcDegrees?: number,
+  rotateDuplicates?: bool,
   useOriginal?: bool,
 ): [Sketch]
 ```
@@ -27,8 +27,8 @@ patternCircular2d(
 | `sketchSet` | [`[Sketch]`](/docs/kcl-std/types/std-types-Sketch) | Which sketch(es) to pattern | Yes |
 | `instances` | [`number`](/docs/kcl-std/types/std-types-number) | The number of total instances. Must be greater than or equal to 1. This includes the original entity. For example, if instances is 2, there will be two copies -- the original, and one new copy. If instances is 1, this has no effect. | Yes |
 | `center` | [`Point2d`](/docs/kcl-std/types/std-types-Point2d) | The center about which to make the pattern. This is a 2D vector. | Yes |
-| `arcDegrees` | [`number`](/docs/kcl-std/types/std-types-number) | The arc angle (in degrees) to place the repetitions. Must be greater than 0. | Yes |
-| `rotateDuplicates` | [`bool`](/docs/kcl-std/types/std-types-bool) | Whether or not to rotate the duplicates as they are copied. | Yes |
+| `arcDegrees` | [`number`](/docs/kcl-std/types/std-types-number) | The arc angle (in degrees) to place the repetitions. Must be greater than 0. Defaults to 360. | No |
+| `rotateDuplicates` | [`bool`](/docs/kcl-std/types/std-types-bool) | Whether or not to rotate the duplicates as they are copied. Defaults to true. | No |
 | `useOriginal` | [`bool`](/docs/kcl-std/types/std-types-bool) | If the target was sketched on an extrusion, setting this will use the original sketch as the target, not the entire joined solid. Defaults to false. | No |
 
 ### Returns

e2e/playwright/code-pane-and-errors.spec.ts

@@ -235,6 +235,48 @@ extrude001 = extrude(sketch001, length = 5)`
         .first()
     ).toBeVisible()
   })
+
+  test('KCL errors with functions show hints for the entire backtrace', async ({
+    page,
+    homePage,
+    scene,
+    cmdBar,
+    editor,
+    toolbar,
+  }) => {
+    await homePage.goToModelingScene()
+    await scene.settled(cmdBar)
+
+    const code = `fn check(@x) {
+  return assert(x, isGreaterThan = 0)
+}
+
+fn middle(@x) {
+  return check(x)
+}
+
+middle(1)
+middle(0)
+`
+    await test.step('Set the code with a KCL error', async () => {
+      await toolbar.openPane('code')
+      await editor.replaceCode('', code)
+    })
+    // This shows all the diagnostics in a way that doesn't require the mouse
+    // pointer hovering over a coordinate, which would be brittle.
+    await test.step('Open CodeMirror diagnostics list', async () => {
+      // Ensure keyboard focus is in the editor.
+      await page.getByText('fn check(').click()
+      await page.keyboard.press('ControlOrMeta+Shift+M')
+    })
+    await expect(
+      page.getByText(`assert failed: Expected 0 to be greater than 0 but it wasn't
+check()
+middle()`)
+    ).toBeVisible()
+    // There should be one hint inside middle() and one at the top level.
+    await expect(page.getByText('Part of the error backtrace')).toHaveCount(2)
+  })
 })
 
 test(

e2e/playwright/command-bar-tests.spec.ts

@@ -36,27 +36,29 @@ test.describe('Command bar tests', () => {
     await u.closeDebugPanel()
 
     // Click the line of code for xLine.
-    await page.getByText(`close()`).click() // TODO remove this and reinstate // await topHorzSegmentClick()
+    await page.getByText(`startProfile(at = [-10, -10])`).click()
+
+    // Wait for the selection to register (TODO: we need a definitive way to wait for this)
+    await page.waitForTimeout(200)
 
     await toolbar.extrudeButton.click()
     await cmdBar.expectState({
       stage: 'arguments',
       commandName: 'Extrude',
-      currentArgKey: 'sketches',
-      currentArgValue: '',
+      currentArgKey: 'length',
+      currentArgValue: '5',
       headerArguments: {
-        Sketches: '',
+        Profiles: '1 profile',
         Length: '',
       },
-      highlightedHeaderArg: 'sketches',
+      highlightedHeaderArg: 'length',
     })
     await cmdBar.progressCmdBar()
-    await cmdBar.progressCmdBar()
     await cmdBar.expectState({
       stage: 'review',
       commandName: 'Extrude',
       headerArguments: {
-        Sketches: '1 segment',
+        Profiles: '1 profile',
         Length: '5',
       },
     })
@@ -286,7 +288,7 @@ test.describe('Command bar tests', () => {
     await cmdBar.cmdOptions.getByText('Extrude').click()
 
     // Assert that we're on the selection step
-    await expect(page.getByRole('button', { name: 'sketches' })).toBeDisabled()
+    await expect(page.getByRole('button', { name: 'Profiles' })).toBeDisabled()
     // Select a face
     await page.mouse.move(700, 200)
     await page.mouse.click(700, 200)
@@ -399,7 +401,6 @@ test.describe('Command bar tests', () => {
         sortBy: 'last-modified-desc',
       })
       await page.goto(page.url() + targetURL)
-      expect(page.url()).toContain(targetURL)
     })
 
     await test.step(`Submit the command`, async () => {
@@ -410,7 +411,7 @@ test.describe('Command bar tests', () => {
         currentArgValue: '',
         headerArguments: {
           Method: '',
-          Name: 'test',
+          Name: 'main.kcl',
           Code: '1 line',
         },
         highlightedHeaderArg: 'method',
@@ -421,7 +422,7 @@ test.describe('Command bar tests', () => {
         commandName: 'Import file from URL',
         headerArguments: {
           Method: 'New project',
-          Name: 'test',
+          Name: 'main.kcl',
           Code: '1 line',
         },
       })
@@ -463,7 +464,6 @@ test.describe('Command bar tests', () => {
         sortBy: 'last-modified-desc',
       })
       await page.goto(page.url() + targetURL)
-      expect(page.url()).toContain(targetURL)
     })
 
     await test.step(`Submit the command`, async () => {
@@ -474,7 +474,7 @@ test.describe('Command bar tests', () => {
         currentArgValue: '',
         headerArguments: {
           Method: '',
-          Name: 'test',
+          Name: 'main.kcl',
           Code: '1 line',
         },
         highlightedHeaderArg: 'method',
@@ -487,7 +487,7 @@ test.describe('Command bar tests', () => {
         currentArgValue: '',
         headerArguments: {
           Method: 'Existing project',
-          Name: 'test',
+          Name: 'main.kcl',
           ProjectName: '',
           Code: '1 line',
         },
@@ -500,7 +500,7 @@ test.describe('Command bar tests', () => {
         headerArguments: {
           Method: 'Existing project',
           ProjectName: 'testProjectDir',
-          Name: 'test',
+          Name: 'main.kcl',
           Code: '1 line',
         },
       })
@@ -510,7 +510,7 @@ test.describe('Command bar tests', () => {
     await test.step(`Ensure we created the project and are in the modeling scene`, async () => {
       await editor.expectEditor.toContain('extrusionDistance = 12')
       await toolbar.openPane('files')
-      await toolbar.expectFileTreeState(['main.kcl', 'test.kcl'])
+      await toolbar.expectFileTreeState(['main-1.kcl', 'main.kcl'])
     })
   })
 
@@ -661,4 +661,27 @@ c = 3 + a`
       `a = 5b = a * amyParameter001 = ${newValue}c = 3 + a`
     )
   })
+
+  test('Command palette can be opened via query parameter', async ({
+    page,
+    homePage,
+    cmdBar,
+  }) => {
+    await page.goto(`${page.url()}/?cmd=app.theme&groupId=settings`)
+    await homePage.expectState({
+      projectCards: [],
+      sortBy: 'last-modified-desc',
+    })
+    await cmdBar.expectState({
+      stage: 'arguments',
+      commandName: 'Settings · app · theme',
+      currentArgKey: 'value',
+      currentArgValue: '',
+      headerArguments: {
+        Level: 'user',
+        Value: '',
+      },
+      highlightedHeaderArg: 'value',
+    })
+  })
 })

e2e/playwright/editor-tests.spec.ts

@@ -1131,14 +1131,15 @@ sketch001 = startSketchOn(XZ)
     await page.waitForTimeout(100)
 
     await page.getByText('startProfile(at = [4.61, -14.01])').click()
+    // Wait for the selection to register (TODO: we need a definitive way to wait for this)
+    await page.waitForTimeout(200)
     await toolbar.extrudeButton.click()
-    await cmdBar.progressCmdBar()
     await cmdBar.expectState({
       stage: 'arguments',
       currentArgKey: 'length',
       currentArgValue: '5',
       headerArguments: {
-        Sketches: '1 face',
+        Profiles: '1 profile',
         Length: '',
       },
       highlightedHeaderArg: 'length',
@@ -1148,7 +1149,7 @@ sketch001 = startSketchOn(XZ)
     await cmdBar.expectState({
       stage: 'review',
       headerArguments: {
-        Sketches: '1 face',
+        Profiles: '1 profile',
         Length: '5',
       },
       commandName: 'Extrude',
@@ -1354,7 +1355,9 @@ sketch001 = startSketchOn(XZ)
       const u = await getUtils(page)
       const projectLink = page.getByRole('link', { name: 'cube' })
       const gizmo = page.locator('[aria-label*=gizmo]')
-      const resetCameraButton = page.getByRole('button', { name: 'Reset view' })
+      const resetCameraButton = page.getByRole('button', {
+        name: 'Reset view',
+      })
       const locationToHaveColor = async (
         position: { x: number; y: number },
         color: [number, number, number]

e2e/playwright/fixtures/cmdBarFixture.ts

@@ -146,9 +146,7 @@ export class CmdBarFixture {
     await this.cmdBarOpenBtn.click()
     await expect(this.page.getByPlaceholder('Search commands')).toBeVisible()
     if (selectCmd === 'promptToEdit') {
-      const promptEditCommand = this.page.getByText(
-        'Use Zoo AI to edit your parts and code.'
-      )
+      const promptEditCommand = this.selectOption({ name: 'Text-to-CAD Edit' })
       await expect(promptEditCommand.first()).toBeVisible()
       await promptEditCommand.first().scrollIntoViewIfNeeded()
       await promptEditCommand.first().click()

e2e/playwright/fixtures/homePageFixture.ts

@@ -121,11 +121,13 @@ export class HomePageFixture {
     await projectCard.click()
   }
 
-  goToModelingScene = async (name: string = 'testDefault') => {
+  /** Returns the project name in case caller has used the default and needs it */
+  goToModelingScene = async (name = 'testDefault') => {
     // On web this is a no-op. There is no project view.
-    if (process.env.PLATFORM === 'web') return
+    if (process.env.PLATFORM === 'web') return ''
 
     await this.createAndGoToProject(name)
+    return name
   }
 
   isNativeFileMenuCreated = async () => {

e2e/playwright/native-file-menu.spec.ts

@@ -252,7 +252,7 @@ test.describe(
           tronApp,
           'Edit.Modify with Zoo Text-To-CAD'
         )
-        await cmdBar.expectCommandName('Prompt-to-edit')
+        await cmdBar.expectCommandName('Text-to-CAD Edit')
       })
       await test.step('Modeling.Edit.Edit parameter', async () => {
         await page.waitForTimeout(250)
@@ -518,7 +518,7 @@ test.describe(
           'Design.Create with Zoo Text-To-CAD'
         )
         await cmdBar.toBeOpened()
-        await cmdBar.expectCommandName('Text to CAD')
+        await cmdBar.expectCommandName('Text-to-CAD Create')
       })
 
       await test.step('Modeling.Design.Modify with Zoo Text-To-CAD', async () => {
@@ -528,7 +528,7 @@ test.describe(
           'Design.Modify with Zoo Text-To-CAD'
         )
         await cmdBar.toBeOpened()
-        await cmdBar.expectCommandName('Prompt-to-edit')
+        await cmdBar.expectCommandName('Text-to-CAD Edit')
       })
 
       await test.step('Modeling.Help.KCL code samples', async () => {

e2e/playwright/point-click.spec.ts

@@ -74,20 +74,11 @@ test.describe('Point-and-click tests', () => {
 
     await test.step('do extrude flow and check extrude code is added to editor', async () => {
       await toolbar.extrudeButton.click()
-      await cmdBar.expectState({
-        stage: 'arguments',
-        currentArgKey: 'sketches',
-        currentArgValue: '',
-        headerArguments: { Sketches: '', Length: '' },
-        highlightedHeaderArg: 'sketches',
-        commandName: 'Extrude',
-      })
-      await cmdBar.progressCmdBar()
       await cmdBar.expectState({
         stage: 'arguments',
         currentArgKey: 'length',
         currentArgValue: '5',
-        headerArguments: { Sketches: '1 face', Length: '' },
+        headerArguments: { Profiles: '1 profile', Length: '' },
         highlightedHeaderArg: 'length',
         commandName: 'Extrude',
       })
@@ -98,7 +89,7 @@ test.describe('Point-and-click tests', () => {
 
       await cmdBar.expectState({
         stage: 'review',
-        headerArguments: { Sketches: '1 face', Length: '5' },
+        headerArguments: { Profiles: '1 profile', Length: '5' },
         commandName: 'Extrude',
       })
       await cmdBar.progressCmdBar()
@@ -1634,15 +1625,15 @@ sketch002 = startSketchOn(plane001)
             stage: 'arguments',
             currentArgKey: 'sketches',
             currentArgValue: '',
-            headerArguments: { Sketches: '' },
-            highlightedHeaderArg: 'sketches',
+            headerArguments: { Profiles: '' },
+            highlightedHeaderArg: 'Profiles',
             commandName: 'Loft',
           })
           await selectSketches()
           await cmdBar.progressCmdBar()
           await cmdBar.expectState({
             stage: 'review',
-            headerArguments: { Sketches: '2 faces' },
+            headerArguments: { Profiles: '2 profiles' },
             commandName: 'Loft',
           })
           await cmdBar.submit()
@@ -1654,18 +1645,9 @@ sketch002 = startSketchOn(plane001)
 
         await test.step(`Go through the command bar flow with preselected sketches`, async () => {
           await toolbar.loftButton.click()
-          await cmdBar.expectState({
-            stage: 'arguments',
-            currentArgKey: 'sketches',
-            currentArgValue: '',
-            headerArguments: { Sketches: '' },
-            highlightedHeaderArg: 'sketches',
-            commandName: 'Loft',
-          })
-          await cmdBar.progressCmdBar()
           await cmdBar.expectState({
             stage: 'review',
-            headerArguments: { Sketches: '2 faces' },
+            headerArguments: { Profiles: '2 profiles' },
             commandName: 'Loft',
           })
           await cmdBar.submit()
@@ -1830,10 +1812,10 @@ sketch002 = startSketchOn(XZ)
           currentArgValue: '',
           headerArguments: {
             Sectional: '',
-            Sketches: '',
+            Profiles: '',
             Path: '',
           },
-          highlightedHeaderArg: 'sketches',
+          highlightedHeaderArg: 'Profiles',
           stage: 'arguments',
         })
         await clickOnSketch1()
@@ -1844,7 +1826,7 @@ sketch002 = startSketchOn(XZ)
           currentArgValue: '',
           headerArguments: {
             Sectional: '',
-            Sketches: '1 face',
+            Profiles: '1 profile',
             Path: '',
           },
           highlightedHeaderArg: 'path',
@@ -1857,7 +1839,7 @@ sketch002 = startSketchOn(XZ)
           currentArgValue: '',
           headerArguments: {
             Sectional: '',
-            Sketches: '1 face',
+            Profiles: '1 profile',
             Path: '',
           },
           highlightedHeaderArg: 'path',
@@ -1867,7 +1849,7 @@ sketch002 = startSketchOn(XZ)
         await cmdBar.expectState({
           commandName: 'Sweep',
           headerArguments: {
-            Sketches: '1 face',
+            Profiles: '1 profile',
             Path: '1 segment',
             Sectional: '',
           },
@@ -1968,10 +1950,10 @@ profile001 = ${circleCode}`
         currentArgValue: '',
         headerArguments: {
           Sectional: '',
-          Sketches: '',
+          Profiles: '',
           Path: '',
         },
-        highlightedHeaderArg: 'sketches',
+        highlightedHeaderArg: 'Profiles',
         stage: 'arguments',
       })
       await editor.scrollToText(circleCode)
@@ -1983,7 +1965,7 @@ profile001 = ${circleCode}`
         currentArgValue: '',
         headerArguments: {
           Sectional: '',
-          Sketches: '1 face',
+          Profiles: '1 profile',
           Path: '',
         },
         highlightedHeaderArg: 'path',
@@ -1997,7 +1979,7 @@ profile001 = ${circleCode}`
         currentArgValue: '',
         headerArguments: {
           Sectional: '',
-          Sketches: '1 face',
+          Profiles: '1 profile',
           Path: '',
         },
         highlightedHeaderArg: 'path',
@@ -2007,7 +1989,7 @@ profile001 = ${circleCode}`
       await cmdBar.expectState({
         commandName: 'Sweep',
         headerArguments: {
-          Sketches: '1 face',
+          Profiles: '1 profile',
           Path: '1 helix',
           Sectional: '',
         },
@@ -2106,18 +2088,6 @@ extrude001 = extrude(sketch001, length = -12)
     await test.step(`Apply fillet to the preselected edge`, async () => {
       await page.waitForTimeout(100)
       await toolbar.filletButton.click()
-      await cmdBar.expectState({
-        commandName: 'Fillet',
-        highlightedHeaderArg: 'selection',
-        currentArgKey: 'selection',
-        currentArgValue: '',
-        headerArguments: {
-          Selection: '',
-          Radius: '',
-        },
-        stage: 'arguments',
-      })
-      await cmdBar.progressCmdBar()
       await cmdBar.expectState({
         commandName: 'Fillet',
         highlightedHeaderArg: 'radius',
@@ -2647,18 +2617,6 @@ extrude001 = extrude(profile001, length = 5)
       await test.step(`Apply fillet`, async () => {
         await page.waitForTimeout(100)
         await toolbar.filletButton.click()
-        await cmdBar.expectState({
-          commandName: 'Fillet',
-          highlightedHeaderArg: 'selection',
-          currentArgKey: 'selection',
-          currentArgValue: '',
-          headerArguments: {
-            Selection: '',
-            Radius: '',
-          },
-          stage: 'arguments',
-        })
-        await cmdBar.progressCmdBar()
         await cmdBar.expectState({
           commandName: 'Fillet',
           highlightedHeaderArg: 'radius',
@@ -2764,19 +2722,6 @@ extrude001 = extrude(sketch001, length = -12)
     await test.step(`Apply chamfer to the preselected edge`, async () => {
       await page.waitForTimeout(100)
       await toolbar.chamferButton.click()
-      await cmdBar.expectState({
-        commandName: 'Chamfer',
-        highlightedHeaderArg: 'selection',
-        currentArgKey: 'selection',
-        currentArgValue: '',
-        headerArguments: {
-          Selection: '',
-          Length: '',
-        },
-        stage: 'arguments',
-      })
-      await cmdBar.progressCmdBar()
-      await page.waitForTimeout(1000)
       await cmdBar.expectState({
         commandName: 'Chamfer',
         highlightedHeaderArg: 'length',
@@ -3260,8 +3205,6 @@ extrude001 = extrude(sketch001, length = 30)
         await test.step(`Go through the command bar flow with a preselected face (cap)`, async () => {
           await toolbar.shellButton.click()
           await cmdBar.progressCmdBar()
-          await page.waitForTimeout(500)
-          await cmdBar.progressCmdBar()
           await cmdBar.expectState({
             stage: 'review',
             headerArguments: {
@@ -3691,16 +3634,17 @@ tag=$rectangleSegmentC002,
       await scene.settled(cmdBar)
 
       // select line of code
-      const codeToSelection = `segAng(rectangleSegmentA002) - 90,`
+      const codeToSelection = `startProfile(at = [-66.77, 84.81])`
       // revolve
       await editor.scrollToText(codeToSelection)
       await page.getByText(codeToSelection).click()
+      // Wait for the selection to register (TODO: we need a definitive way to wait for this)
+      await page.waitForTimeout(200)
       await toolbar.revolveButton.click()
       await cmdBar.progressCmdBar()
       await cmdBar.progressCmdBar()
       await cmdBar.progressCmdBar()
       await cmdBar.progressCmdBar()
-      await cmdBar.progressCmdBar()
 
       const newCodeToFind = `revolve001 = revolve(sketch002, angle = 360, axis = X)`
       expect(editor.expectEditor.toContain(newCodeToFind)).toBeTruthy()
@@ -4629,24 +4573,12 @@ path001 = startProfile(sketch001, at = [0, 0])
 
     await test.step('Go through command bar flow', async () => {
       await toolbar.extrudeButton.click()
-      await cmdBar.expectState({
-        stage: 'arguments',
-        currentArgKey: 'sketches',
-        currentArgValue: '',
-        headerArguments: {
-          Sketches: '',
-          Length: '',
-        },
-        highlightedHeaderArg: 'sketches',
-        commandName: 'Extrude',
-      })
-      await cmdBar.progressCmdBar()
       await cmdBar.expectState({
         stage: 'arguments',
         currentArgKey: 'length',
         currentArgValue: '5',
         headerArguments: {
-          Sketches: '2 faces',
+          Profiles: '2 profiles',
           Length: '',
         },
         highlightedHeaderArg: 'length',
@@ -4657,7 +4589,7 @@ path001 = startProfile(sketch001, at = [0, 0])
       await cmdBar.expectState({
         stage: 'review',
         headerArguments: {
-          Sketches: '2 faces',
+          Profiles: '2 profiles',
           Length: '1',
         },
         commandName: 'Extrude',
@@ -4723,25 +4655,12 @@ path001 = startProfile(sketch001, at = [0, 0])
 
     await test.step('Go through command bar flow', async () => {
       await toolbar.sweepButton.click()
-      await cmdBar.expectState({
-        stage: 'arguments',
-        currentArgKey: 'sketches',
-        currentArgValue: '',
-        headerArguments: {
-          Sketches: '',
-          Path: '',
-          Sectional: '',
-        },
-        highlightedHeaderArg: 'sketches',
-        commandName: 'Sweep',
-      })
-      await cmdBar.progressCmdBar()
       await cmdBar.expectState({
         stage: 'arguments',
         currentArgKey: 'path',
         currentArgValue: '',
         headerArguments: {
-          Sketches: '2 faces',
+          Profiles: '2 profiles',
           Path: '',
           Sectional: '',
         },
@@ -4754,7 +4673,7 @@ path001 = startProfile(sketch001, at = [0, 0])
       await cmdBar.expectState({
         stage: 'review',
         headerArguments: {
-          Sketches: '2 faces',
+          Profiles: '2 profiles',
           Path: '1 segment',
           Sectional: '',
         },
@@ -4820,25 +4739,12 @@ path001 = startProfile(sketch001, at = [0, 0])
     await test.step('Go through command bar flow', async () => {
       await toolbar.closePane('code')
       await toolbar.revolveButton.click()
-      await cmdBar.expectState({
-        stage: 'arguments',
-        currentArgKey: 'sketches',
-        currentArgValue: '',
-        headerArguments: {
-          Sketches: '',
-          AxisOrEdge: '',
-          Angle: '',
-        },
-        highlightedHeaderArg: 'sketches',
-        commandName: 'Revolve',
-      })
-      await cmdBar.progressCmdBar()
       await cmdBar.expectState({
         stage: 'arguments',
         currentArgKey: 'axisOrEdge',
         currentArgValue: '',
         headerArguments: {
-          Sketches: '2 faces',
+          Profiles: '2 profiles',
           AxisOrEdge: '',
           Angle: '',
         },
@@ -4854,7 +4760,7 @@ path001 = startProfile(sketch001, at = [0, 0])
         currentArgKey: 'angle',
         currentArgValue: '360',
         headerArguments: {
-          Sketches: '2 faces',
+          Profiles: '2 profiles',
           AxisOrEdge: 'Edge',
           Edge: '1 segment',
           Angle: '',
@@ -4867,7 +4773,7 @@ path001 = startProfile(sketch001, at = [0, 0])
       await cmdBar.expectState({
         stage: 'review',
         headerArguments: {
-          Sketches: '2 faces',
+          Profiles: '2 profiles',
           AxisOrEdge: 'Edge',
           Edge: '1 segment',
           Angle: '180',

e2e/playwright/sketch-tests.spec.ts

@@ -995,8 +995,8 @@ profile001 = startProfile(sketch001, at = [${roundOff(scale * 69.6)}, ${roundOff
     await u.expectCmdLog('[data-message-type="execution-done"]')
     await u.closeDebugPanel()
 
-    // click "line(end = [1.32, 0.38])"
-    await page.getByText(`line(end = [1.32, 0.38])`).click()
+    // click profile in code
+    await page.getByText(`startProfile(at = [-0.45, 0.87])`).click()
     await page.waitForTimeout(100)
     await expect(page.getByRole('button', { name: 'Edit Sketch' })).toBeEnabled(
       { timeout: 10_000 }
@@ -1014,14 +1014,13 @@ profile001 = startProfile(sketch001, at = [${roundOff(scale * 69.6)}, ${roundOff
     // click extrude
     await toolbar.extrudeButton.click()
 
-    // sketch selection should already have been made. "Sketches: 1 face" only show up when the selection has been made already
+    // sketch selection should already have been made.
     // otherwise the cmdbar would be waiting for a selection.
-    await cmdBar.progressCmdBar()
     await cmdBar.expectState({
       stage: 'arguments',
       currentArgKey: 'length',
       currentArgValue: '5',
-      headerArguments: { Sketches: '1 segment', Length: '' },
+      headerArguments: { Profiles: '1 profile', Length: '' },
       highlightedHeaderArg: 'length',
       commandName: 'Extrude',
     })

e2e/playwright/text-to-cad-tests.spec.ts

@@ -4,9 +4,10 @@ import type { Page } from '@playwright/test'
 
 import { createProject, getUtils } from '@e2e/playwright/test-utils'
 import { expect, test } from '@e2e/playwright/zoo-test'
+import type { CmdBarFixture } from '@e2e/playwright/fixtures/cmdBarFixture'
 
 test.describe('Text-to-CAD tests', () => {
-  test('basic lego happy case', async ({ page, homePage }) => {
+  test('basic lego happy case', async ({ page, homePage, cmdBar }) => {
     const u = await getUtils(page)
 
     await test.step('Set up', async () => {
@@ -15,7 +16,11 @@ test.describe('Text-to-CAD tests', () => {
       await u.waitForPageLoad()
     })
 
-    await sendPromptFromCommandBarTriggeredByButton(page, 'a 2x4 lego')
+    await sendPromptFromCommandBarAndSetExistingProject(
+      page,
+      'a 2x4 lego',
+      cmdBar
+    )
 
     // Find the toast.
     // Look out for the toast message
@@ -56,6 +61,7 @@ test.describe('Text-to-CAD tests', () => {
   test('success model, then ignore success toast, user can create new prompt from command bar', async ({
     page,
     homePage,
+    cmdBar,
   }) => {
     const u = await getUtils(page)
 
@@ -64,7 +70,11 @@ test.describe('Text-to-CAD tests', () => {
     await homePage.goToModelingScene()
     await u.waitForPageLoad()
 
-    await sendPromptFromCommandBarTriggeredByButton(page, 'a 2x6 lego')
+    await sendPromptFromCommandBarAndSetExistingProject(
+      page,
+      'a 2x6 lego',
+      cmdBar
+    )
 
     // Find the toast.
     // Look out for the toast message
@@ -82,7 +92,11 @@ test.describe('Text-to-CAD tests', () => {
     await expect(successToastMessage).toBeVisible({ timeout: 15000 })
 
     // Can send a new prompt from the command bar.
-    await sendPromptFromCommandBarTriggeredByButton(page, 'a 2x4 lego')
+    await sendPromptFromCommandBarAndSetExistingProject(
+      page,
+      'a 2x4 lego',
+      cmdBar
+    )
 
     // Find the toast.
     // Look out for the toast message
@@ -100,6 +114,7 @@ test.describe('Text-to-CAD tests', () => {
   test('you can reject text-to-cad output and it does nothing', async ({
     page,
     homePage,
+    cmdBar,
   }) => {
     const u = await getUtils(page)
 
@@ -108,7 +123,11 @@ test.describe('Text-to-CAD tests', () => {
     await homePage.goToModelingScene()
     await u.waitForPageLoad()
 
-    await sendPromptFromCommandBarTriggeredByButton(page, 'a 2x4 lego')
+    await sendPromptFromCommandBarAndSetExistingProject(
+      page,
+      'a 2x4 lego',
+      cmdBar
+    )
 
     // Find the toast.
     // Look out for the toast message
@@ -141,6 +160,7 @@ test.describe('Text-to-CAD tests', () => {
   test('sending a bad prompt fails, can dismiss', async ({
     page,
     homePage,
+    cmdBar,
   }) => {
     const u = await getUtils(page)
 
@@ -150,7 +170,11 @@ test.describe('Text-to-CAD tests', () => {
     await u.waitForPageLoad()
 
     const randomPrompt = `aslkdfja;` + Date.now() + `FFFFEIWJF`
-    await sendPromptFromCommandBarTriggeredByButton(page, randomPrompt)
+    await sendPromptFromCommandBarAndSetExistingProject(
+      page,
+      randomPrompt,
+      cmdBar
+    )
 
     // Find the toast.
     // Look out for the toast message
@@ -188,6 +212,7 @@ test.describe('Text-to-CAD tests', () => {
   test('sending a bad prompt fails, can start over from toast', async ({
     page,
     homePage,
+    cmdBar,
   }) => {
     const u = await getUtils(page)
 
@@ -197,7 +222,7 @@ test.describe('Text-to-CAD tests', () => {
     await u.waitForPageLoad()
 
     const badPrompt = 'akjsndladf lajbhflauweyfaaaljhr472iouafyvsssssss'
-    await sendPromptFromCommandBarTriggeredByButton(page, badPrompt)
+    await sendPromptFromCommandBarAndSetExistingProject(page, badPrompt, cmdBar)
 
     // Find the toast.
     // Look out for the toast message
@@ -256,6 +281,7 @@ test.describe('Text-to-CAD tests', () => {
   test('sending a bad prompt fails, can ignore toast, can start over from command bar', async ({
     page,
     homePage,
+    cmdBar,
   }) => {
     const u = await getUtils(page)
 
@@ -265,7 +291,7 @@ test.describe('Text-to-CAD tests', () => {
     await u.waitForPageLoad()
 
     const badPrompt = 'akjsndladflajbhflauweyf15;'
-    await sendPromptFromCommandBarTriggeredByButton(page, badPrompt)
+    await sendPromptFromCommandBarAndSetExistingProject(page, badPrompt, cmdBar)
 
     // Find the toast.
     // Look out for the toast message
@@ -292,7 +318,11 @@ test.describe('Text-to-CAD tests', () => {
     await expect(page.getByText(`Text-to-CAD failed`)).toBeVisible()
 
     // They should be able to try again from the command bar.
-    await sendPromptFromCommandBarTriggeredByButton(page, 'a 2x4 lego')
+    await sendPromptFromCommandBarAndSetExistingProject(
+      page,
+      'a 2x4 lego',
+      cmdBar
+    )
 
     // Find the toast.
     // Look out for the toast message
@@ -310,17 +340,40 @@ test.describe('Text-to-CAD tests', () => {
   test('ensure you can shift+enter in the prompt box', async ({
     page,
     homePage,
+    cmdBar,
   }) => {
     const u = await getUtils(page)
 
     await page.setBodyDimensions({ width: 1000, height: 500 })
 
-    await homePage.goToModelingScene()
+    const projectName = await homePage.goToModelingScene()
     await u.waitForPageLoad()
 
     const promptWithNewline = `a 2x4\nlego`
 
-    await page.getByTestId('text-to-cad').click()
+    await test.step('Get to the prompt step to test', async () => {
+      await cmdBar.openCmdBar()
+      await cmdBar.selectOption({ name: 'Text-to-CAD Create' }).click()
+
+      await cmdBar.currentArgumentInput.fill('existing')
+      await cmdBar.progressCmdBar()
+
+      await cmdBar.currentArgumentInput.fill(projectName)
+      await cmdBar.progressCmdBar()
+
+      await cmdBar.expectState({
+        commandName: 'Text-to-CAD Create',
+        stage: 'arguments',
+        currentArgKey: 'prompt',
+        currentArgValue: '',
+        highlightedHeaderArg: 'prompt',
+        headerArguments: {
+          Method: 'Existing project',
+          ProjectName: projectName,
+          Prompt: '',
+        },
+      })
+    })
 
     // Type the prompt.
     await page.keyboard.type('a 2x4')
@@ -354,6 +407,7 @@ test.describe('Text-to-CAD tests', () => {
   test('can do many at once and get many prompts back, and interact with many', async ({
     page,
     homePage,
+    cmdBar,
   }) => {
     // Let this test run longer since we've seen it timeout.
     test.setTimeout(180_000)
@@ -365,11 +419,23 @@ test.describe('Text-to-CAD tests', () => {
     await homePage.goToModelingScene()
     await u.waitForPageLoad()
 
-    await sendPromptFromCommandBarTriggeredByButton(page, 'a 2x4 lego')
+    await sendPromptFromCommandBarAndSetExistingProject(
+      page,
+      'a 2x4 lego',
+      cmdBar
+    )
 
-    await sendPromptFromCommandBarTriggeredByButton(page, 'a 2x8 lego')
+    await sendPromptFromCommandBarAndSetExistingProject(
+      page,
+      'a 2x8 lego',
+      cmdBar
+    )
 
-    await sendPromptFromCommandBarTriggeredByButton(page, 'a 2x10 lego')
+    await sendPromptFromCommandBarAndSetExistingProject(
+      page,
+      'a 2x10 lego',
+      cmdBar
+    )
 
     // Find the toast.
     // Look out for the toast message
@@ -440,6 +506,7 @@ test.describe('Text-to-CAD tests', () => {
   test('can do many at once with errors, clicking dismiss error does not dismiss all', async ({
     page,
     homePage,
+    cmdBar,
   }) => {
     const u = await getUtils(page)
 
@@ -448,11 +515,16 @@ test.describe('Text-to-CAD tests', () => {
     await homePage.goToModelingScene()
     await u.waitForPageLoad()
 
-    await sendPromptFromCommandBarTriggeredByButton(page, 'a 2x4 lego')
-
-    await sendPromptFromCommandBarTriggeredByButton(
+    await sendPromptFromCommandBarAndSetExistingProject(
       page,
-      'alkjsdnlajshdbfjlhsbdf a;askjdnf'
+      'a 2x4 lego',
+      cmdBar
+    )
+
+    await sendPromptFromCommandBarAndSetExistingProject(
+      page,
+      'alkjsdnlajshdbfjlhsbdf a;askjdnf',
+      cmdBar
     )
 
     // Find the toast.
@@ -526,7 +598,9 @@ async function _sendPromptFromCommandBar(page: Page, promptStr: string) {
     const cmdSearchBar = page.getByPlaceholder('Search commands')
     await expect(cmdSearchBar).toBeVisible()
 
-    const textToCadCommand = page.getByText('Use the Zoo Text-to-CAD API')
+    const textToCadCommand = page.getByRole('option', {
+      name: 'Text-to-CAD Create',
+    })
     await expect(textToCadCommand.first()).toBeVisible()
     // Click the Text-to-CAD command
     await textToCadCommand.first().scrollIntoViewIfNeeded()
@@ -544,29 +618,67 @@ async function _sendPromptFromCommandBar(page: Page, promptStr: string) {
   })
 }
 
-async function sendPromptFromCommandBarTriggeredByButton(
+async function sendPromptFromCommandBarAndSetExistingProject(
   page: Page,
-  promptStr: string
+  promptStr: string,
+  cmdBar: CmdBarFixture,
+  projectName = 'testDefault'
 ) {
   await page.waitForTimeout(1000)
   await test.step(`Send prompt from command bar: ${promptStr}`, async () => {
-    await page.getByTestId('text-to-cad').click()
+    await cmdBar.openCmdBar()
+    await cmdBar.selectOption({ name: 'Text-to-CAD Create' }).click()
 
-    // Enter the prompt.
-    const prompt = page.getByRole('textbox', { name: 'Prompt' })
-    await expect(prompt.first()).toBeVisible()
+    await cmdBar.expectState({
+      commandName: 'Text-to-CAD Create',
+      stage: 'arguments',
+      currentArgKey: 'method',
+      currentArgValue: '',
+      highlightedHeaderArg: 'method',
+      headerArguments: {
+        Method: '',
+        Prompt: '',
+      },
+    })
+    await cmdBar.currentArgumentInput.fill('existing')
+    await cmdBar.progressCmdBar()
 
-    // Type the prompt.
-    await page.keyboard.type(promptStr)
-    await page.waitForTimeout(200)
-    await page.keyboard.press('Enter')
+    await cmdBar.expectState({
+      commandName: 'Text-to-CAD Create',
+      stage: 'arguments',
+      currentArgKey: 'projectName',
+      currentArgValue: '',
+      highlightedHeaderArg: 'projectName',
+      headerArguments: {
+        Method: 'Existing project',
+        ProjectName: '',
+        Prompt: '',
+      },
+    })
+    await cmdBar.currentArgumentInput.fill(projectName)
+    await cmdBar.progressCmdBar()
+
+    await cmdBar.expectState({
+      commandName: 'Text-to-CAD Create',
+      stage: 'arguments',
+      currentArgKey: 'prompt',
+      currentArgValue: '',
+      highlightedHeaderArg: 'prompt',
+      headerArguments: {
+        Method: 'Existing project',
+        ProjectName: projectName,
+        Prompt: '',
+      },
+    })
+    await cmdBar.currentArgumentInput.fill(promptStr)
+    await cmdBar.progressCmdBar()
   })
 }
 
 test(
   'Text-to-CAD functionality',
   { tag: '@electron' },
-  async ({ context, page }, testInfo) => {
+  async ({ context, page, cmdBar }, testInfo) => {
     const projectName = 'project-000'
     const prompt = 'lego 2x4'
     const textToCadFileName = 'lego-2x4.kcl'
@@ -603,7 +715,12 @@ test(
     await openKclCodePanel()
 
     await test.step(`Test file creation`, async () => {
-      await sendPromptFromCommandBarTriggeredByButton(page, prompt)
+      await sendPromptFromCommandBarAndSetExistingProject(
+        page,
+        prompt,
+        cmdBar,
+        projectName
+      )
       // File is considered created if it shows up in the Project Files pane
       await expect(textToCadFileButton).toBeVisible({ timeout: 20_000 })
       expect(fileExists()).toBeTruthy()
@@ -773,12 +890,12 @@ test.describe('Mocked Text-to-CAD API tests', { tag: ['@skipWin'] }, () => {
       )
       await expect(page.getByTestId('app-header-file-name')).toBeVisible()
       await expect(page.getByTestId('app-header-file-name')).toContainText(
-        '2x2x2-cube.kcl'
+        'main.kcl'
       )
 
       await u.openFilePanel()
       await expect(
-        page.getByTestId('file-tree-item').getByText('2x2x2-cube.kcl')
+        page.getByTestId('file-tree-item').getByText('main.kcl')
       ).toBeVisible()
     }
   )
@@ -913,7 +1030,7 @@ test.describe('Mocked Text-to-CAD API tests', { tag: ['@skipWin'] }, () => {
       )
       await expect(page.getByTestId('app-header-file-name')).toBeVisible()
       await expect(page.getByTestId('app-header-file-name')).toContainText(
-        '2x2x2-cube.kcl'
+        'main.kcl'
       )
 
       await page.getByRole('button', { name: 'Reject' }).click()
@@ -961,7 +1078,7 @@ test.describe('Mocked Text-to-CAD API tests', { tag: ['@skipWin'] }, () => {
       )
       await expect(page.getByTestId('app-header-file-name')).toBeVisible()
       await expect(page.getByTestId('app-header-file-name')).toContainText(
-        '2x2x2-cube.kcl'
+        'main.kcl'
       )
     }
   )
@@ -1213,18 +1330,14 @@ test.describe('Mocked Text-to-CAD API tests', { tag: ['@skipWin'] }, () => {
       )
       await expect(page.getByTestId('app-header-file-name')).toBeVisible()
       await expect(page.getByTestId('app-header-file-name')).toContainText(
-        '2x2x2-cube.kcl'
+        'main.kcl'
       )
 
       // Check file is created
       await u.openFilePanel()
-      await expect(
-        page.getByTestId('file-tree-item').getByText('2x2x2-cube.kcl')
-      ).toBeVisible()
-
       await expect(
         page.getByTestId('file-tree-item').getByText('main.kcl')
-      ).not.toBeVisible()
+      ).toBeVisible()
     }
   )
 

e2e/playwright/various.spec.ts

@@ -573,7 +573,6 @@ profile001 = startProfile(sketch002, at = [-12.34, 12.34])
   await expect(page.getByTestId('command-bar')).toBeVisible()
   await page.waitForTimeout(100)
 
-  await cmdBar.progressCmdBar()
   await cmdBar.progressCmdBar()
   await expect(page.getByText('Confirm Extrude')).toBeVisible()
   await cmdBar.progressCmdBar()

public/kcl-samples/README.md

@@ -37,6 +37,8 @@ When you submit a PR to add or modify KCL samples, images will be generated and
 [![bottle](screenshots/bottle.png)](bottle/main.kcl)
 #### [bracket](bracket/main.kcl) ([screenshot](screenshots/bracket.png))
 [![bracket](screenshots/bracket.png)](bracket/main.kcl)
+#### [brake-rotor](brake-rotor/main.kcl) ([screenshot](screenshots/brake-rotor.png))
+[![brake-rotor](screenshots/brake-rotor.png)](brake-rotor/main.kcl)
 #### [car-wheel-assembly](car-wheel-assembly/main.kcl) ([screenshot](screenshots/car-wheel-assembly.png))
 [![car-wheel-assembly](screenshots/car-wheel-assembly.png)](car-wheel-assembly/main.kcl)
 #### [cold-plate](cold-plate/main.kcl) ([screenshot](screenshots/cold-plate.png))
@@ -49,12 +51,16 @@ When you submit a PR to add or modify KCL samples, images will be generated and
 [![countersunk-plate](screenshots/countersunk-plate.png)](countersunk-plate/main.kcl)
 #### [cpu-cooler](cpu-cooler/main.kcl) ([screenshot](screenshots/cpu-cooler.png))
 [![cpu-cooler](screenshots/cpu-cooler.png)](cpu-cooler/main.kcl)
+#### [curtain-wall-anchor-plate](curtain-wall-anchor-plate/main.kcl) ([screenshot](screenshots/curtain-wall-anchor-plate.png))
+[![curtain-wall-anchor-plate](screenshots/curtain-wall-anchor-plate.png)](curtain-wall-anchor-plate/main.kcl)
 #### [cycloidal-gear](cycloidal-gear/main.kcl) ([screenshot](screenshots/cycloidal-gear.png))
 [![cycloidal-gear](screenshots/cycloidal-gear.png)](cycloidal-gear/main.kcl)
 #### [dodecahedron](dodecahedron/main.kcl) ([screenshot](screenshots/dodecahedron.png))
 [![dodecahedron](screenshots/dodecahedron.png)](dodecahedron/main.kcl)
 #### [enclosure](enclosure/main.kcl) ([screenshot](screenshots/enclosure.png))
 [![enclosure](screenshots/enclosure.png)](enclosure/main.kcl)
+#### [engine-valve](engine-valve/main.kcl) ([screenshot](screenshots/engine-valve.png))
+[![engine-valve](screenshots/engine-valve.png)](engine-valve/main.kcl)
 #### [exhaust-manifold](exhaust-manifold/main.kcl) ([screenshot](screenshots/exhaust-manifold.png))
 [![exhaust-manifold](screenshots/exhaust-manifold.png)](exhaust-manifold/main.kcl)
 #### [flange](flange/main.kcl) ([screenshot](screenshots/flange.png))
@@ -103,6 +109,8 @@ When you submit a PR to add or modify KCL samples, images will be generated and
 [![mounting-plate](screenshots/mounting-plate.png)](mounting-plate/main.kcl)
 #### [multi-axis-robot](multi-axis-robot/main.kcl) ([screenshot](screenshots/multi-axis-robot.png))
 [![multi-axis-robot](screenshots/multi-axis-robot.png)](multi-axis-robot/main.kcl)
+#### [pdu-faceplate](pdu-faceplate/main.kcl) ([screenshot](screenshots/pdu-faceplate.png))
+[![pdu-faceplate](screenshots/pdu-faceplate.png)](pdu-faceplate/main.kcl)
 #### [pillow-block-bearing](pillow-block-bearing/main.kcl) ([screenshot](screenshots/pillow-block-bearing.png))
 [![pillow-block-bearing](screenshots/pillow-block-bearing.png)](pillow-block-bearing/main.kcl)
 #### [pipe](pipe/main.kcl) ([screenshot](screenshots/pipe.png))
@@ -119,16 +127,24 @@ When you submit a PR to add or modify KCL samples, images will be generated and
 [![router-template-cross-bar](screenshots/router-template-cross-bar.png)](router-template-cross-bar/main.kcl)
 #### [router-template-slate](router-template-slate/main.kcl) ([screenshot](screenshots/router-template-slate.png))
 [![router-template-slate](screenshots/router-template-slate.png)](router-template-slate/main.kcl)
+#### [sash-window](sash-window/main.kcl) ([screenshot](screenshots/sash-window.png))
+[![sash-window](screenshots/sash-window.png)](sash-window/main.kcl)
 #### [sheet-metal-bracket](sheet-metal-bracket/main.kcl) ([screenshot](screenshots/sheet-metal-bracket.png))
 [![sheet-metal-bracket](screenshots/sheet-metal-bracket.png)](sheet-metal-bracket/main.kcl)
+#### [shepherds-hook-bolt](shepherds-hook-bolt/main.kcl) ([screenshot](screenshots/shepherds-hook-bolt.png))
+[![shepherds-hook-bolt](screenshots/shepherds-hook-bolt.png)](shepherds-hook-bolt/main.kcl)
 #### [socket-head-cap-screw](socket-head-cap-screw/main.kcl) ([screenshot](screenshots/socket-head-cap-screw.png))
 [![socket-head-cap-screw](screenshots/socket-head-cap-screw.png)](socket-head-cap-screw/main.kcl)
+#### [spinning-highrise-tower](spinning-highrise-tower/main.kcl) ([screenshot](screenshots/spinning-highrise-tower.png))
+[![spinning-highrise-tower](screenshots/spinning-highrise-tower.png)](spinning-highrise-tower/main.kcl)
 #### [spur-gear](spur-gear/main.kcl) ([screenshot](screenshots/spur-gear.png))
 [![spur-gear](screenshots/spur-gear.png)](spur-gear/main.kcl)
 #### [spur-reduction-gearset](spur-reduction-gearset/main.kcl) ([screenshot](screenshots/spur-reduction-gearset.png))
 [![spur-reduction-gearset](screenshots/spur-reduction-gearset.png)](spur-reduction-gearset/main.kcl)
 #### [surgical-drill-guide](surgical-drill-guide/main.kcl) ([screenshot](screenshots/surgical-drill-guide.png))
 [![surgical-drill-guide](screenshots/surgical-drill-guide.png)](surgical-drill-guide/main.kcl)
+#### [thermal-block-insert](thermal-block-insert/main.kcl) ([screenshot](screenshots/thermal-block-insert.png))
+[![thermal-block-insert](screenshots/thermal-block-insert.png)](thermal-block-insert/main.kcl)
 #### [tooling-nest-block](tooling-nest-block/main.kcl) ([screenshot](screenshots/tooling-nest-block.png))
 [![tooling-nest-block](screenshots/tooling-nest-block.png)](tooling-nest-block/main.kcl)
 #### [utility-sink](utility-sink/main.kcl) ([screenshot](screenshots/utility-sink.png))

public/kcl-samples/brake-rotor/main.kcl

@@ -0,0 +1,179 @@
+// A 320mm vented brake disc (rotor), with straight vanes, 30mm thick. The disc bell should accommodate 5 M12 wheel studs on a 114.3mm pitch circle diameter.
+
+
+
+
+@settings(defaultLengthUnit = mm)
+
+// Define parameters.
+dDisc = 320
+dPitchCircle = 114.3
+dBore = 64
+nStuds = 5
+dStudDrilling = 12.5 // M12
+hFrictionSurface = 60
+tDiscHalf = 10
+
+// Vent parameters.
+tVent = 10
+wVent = 6
+rVentFillet = 2
+nVentBosses = 36
+
+// Drilling parameters.
+dDrillDia = 6
+aBase = 90
+aSweep = 30
+nArcs = 12
+
+// Bell parameters.
+aDraftBell = 5
+tBell = 5 // Wall thickness.
+hBellAboveDiscFace = 40
+hBellSubflush = 4
+wUndercut = 8
+
+fn drillHole(activeSketch, t) {
+  // Sketch a vent hole at line parameter value t on an arc drawn across the disc surface.
+  rInner = dDisc / 2 - hFrictionSurface
+  rOuter = dDisc / 2
+
+  aStart = aBase
+  aEnd = aBase - aSweep
+
+  // Linear interpolation of radius.
+  rCurrent = rInner + t * (rOuter - rInner)
+
+  // Linear interpolation of angle.
+  aCurrent = aStart + t * (aEnd - aStart)
+
+  // Calculate position.
+  xCenter = rCurrent * cos(aCurrent)
+  yCenter = rCurrent * sin(aCurrent)
+
+  // Draw.
+  drillCircle = circle(activeSketch, center = [xCenter, yCenter], radius = dDrillDia / 2)
+  return drillCircle
+}
+
+fn createDiscHalf(plane, dDiscParam, hFrictionSurfaceParam, tDiscHalfParam) {
+  // Create a disc half with a vent hole pattern.
+  sketchFace = startSketchOn(plane)
+  profileFace = circle(sketchFace, center = [0, 0], radius = dDiscParam / 2)
+    |> subtract2d(tool = circle(sketchFace, center = [0, 0], radius = dDiscParam / 2 - hFrictionSurfaceParam))
+
+  // Create three circles at t = 0, 0.5, and 1
+  hole1 = drillHole(activeSketch = sketchFace, t = 0.2)
+  hole2 = drillHole(activeSketch = sketchFace, t = 0.5)
+  hole3 = drillHole(activeSketch = sketchFace, t = 0.8)
+
+  // Pattern and cut.
+  holes = patternCircular2d(
+    [hole1, hole2, hole3],
+    instances = nArcs,
+    center = [0, 0],
+    arcDegrees = 360,
+    rotateDuplicates = true,
+  )
+  profileDrilled = subtract2d(profileFace, tool = holes)
+
+  // Extrude.
+  discHalf = extrude(profileFace, length = tDiscHalfParam)
+  return discHalf
+}
+
+// ---------------------------------------------------------------------------------------------------------------------
+
+// Create inboard half.
+discInboard = createDiscHalf(
+  plane = XY,
+  dDiscParam = dDisc,
+  hFrictionSurfaceParam = hFrictionSurface,
+  tDiscHalfParam = tDiscHalf,
+)
+
+// Create vents.
+planeVent = offsetPlane(XY, offset = tDiscHalf)
+sketchVent = startSketchOn(planeVent)
+profileVent = startProfile(sketchVent, at = [-wVent, dDisc / 2])
+  |> angledLine(angle = 0, length = wVent, tag = $rectangleSegmentA001)
+  |> angledLine(angle = segAng(rectangleSegmentA001) - 90, length = hFrictionSurface, tag = $seg02)
+  |> angledLine(angle = segAng(rectangleSegmentA001), length = -segLen(rectangleSegmentA001), tag = $seg03)
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)], tag = $seg01)
+  |> close()
+
+ventPad = extrude(profileVent, length = tVent)
+  |> fillet(
+       radius = rVentFillet,
+       tags = [
+         getCommonEdge(faces = [seg01, rectangleSegmentA001]),
+         getCommonEdge(faces = [seg02, rectangleSegmentA001]),
+         getCommonEdge(faces = [seg01, seg03]),
+         getCommonEdge(faces = [seg03, seg02])
+       ],
+     )
+ventSet = patternCircular3d(
+  ventPad,
+  instances = nVentBosses,
+  axis = [0, 0, 1],
+  center = [0, 0, tDiscHalf],
+  arcDegrees = 360,
+  rotateDuplicates = true,
+)
+
+// Create outboard half.
+planeOutboard = offsetPlane(XY, offset = tDiscHalf + tVent)
+discOutboard = createDiscHalf(
+  plane = planeOutboard,
+  dDiscParam = dDisc,
+  hFrictionSurfaceParam = hFrictionSurface,
+  tDiscHalfParam = tDiscHalf,
+)
+
+// Now create bell.
+rCenter = dDisc / 2 - hFrictionSurface - wUndercut
+rBore = dBore / 2
+lDraftExterior = hBellAboveDiscFace / tan(90 - aDraftBell)
+lDraftInterior = (hBellAboveDiscFace - tBell) / tan(90 - aDraftBell)
+
+// Inner and outer radius of outboard face of disc bell.
+rOuter = rCenter - lDraftExterior - rBore
+rInner = rOuter + lDraftExterior - (tBell + lDraftInterior)
+
+sketchDiscBell = startSketchOn(-YZ)
+bodyDiscBell = startProfile(
+       sketchDiscBell,
+       at = [
+         -dDisc / 2 + hFrictionSurface,
+         tDiscHalf * 2 + tVent
+       ],
+     )
+  |> arc(
+       %,
+       angleStart = -180,
+       angleEnd = 0,
+       radius = wUndercut / 2,
+     )
+  |> line(end = [lDraftExterior, hBellAboveDiscFace])
+  |> xLine(length = rOuter, tag = $seg04)
+  |> yLine(length = -tBell)
+  |> xLine(length = -rInner)
+  |> line(end = [-lDraftInterior, -hBellAboveDiscFace])
+  |> line(end = [0, -2]) // Wall thickness.
+  |> xLine(length = -1 * (tBell + wUndercut))
+  |> close(%)
+  |> revolve(axis = Y)
+
+// Drill lug holes.
+sketchLugs = startSketchOn(bodyDiscBell, face = seg04)
+profileStud = circle(sketchLugs, center = [0, dPitchCircle / 2], radius = dStudDrilling / 2)
+  |> patternCircular2d(
+       %,
+       instances = nStuds,
+       center = [0, 0],
+       arcDegrees = 360,
+       rotateDuplicates = true,
+     )
+
+clearance = 2 // Some margin on negative extrude.
+lugs = extrude(profileStud, length = -1 * (tBell + clearance))

public/kcl-samples/curtain-wall-anchor-plate/main.kcl

@@ -0,0 +1,155 @@
+// Curtain Wall Anchor Plate
+// A structural steel L-plate used to anchor curtain wall systems to concrete slabs, with elongated holes for adjustability and bolts with nuts and base plates for secure fastening
+
+// Set units in millimeters (mm)
+@settings(defaultLengthUnit = mm, kclVersion = 1.0)
+
+// Define parameters
+slabPlateBaseLength = 300
+slabPlateHookLength = 80
+slabPlateWidth = 200
+slabPlateThickness = 8
+offsetSlabRail = 200
+
+// Generate L-shaped anchor profile with base and hook flange
+// Includes fillets at internal and external corners for strength and safety
+fn lProfileFn(lengthBase, lengthHook, width, thickness) {
+  profilePlane = startSketchOn(offsetPlane(XZ, offset = -width / 2))
+  profileShape = startProfile(profilePlane, at = [0, 0])
+    |> yLine(length = lengthHook, tag = $hookOutside)
+    |> xLine(length = thickness)
+    |> yLine(length = thickness - lengthHook, tag = $hookInside)
+    |> xLine(length = lengthBase - thickness, tag = $baseInside)
+    |> yLine(length = -thickness)
+    |> line(endAbsolute = [profileStartX(%), profileStartY(%)], tag = $baseOutside)
+    |> close()
+  profileBody = extrude(profileShape, length = width)
+    |> fillet(
+         radius = thickness,
+         tags = [
+           getCommonEdge(faces = [baseInside, hookInside])
+         ],
+       )
+    |> fillet(
+         radius = thickness * 2,
+         tags = [
+           getCommonEdge(faces = [baseOutside, hookOutside])
+         ],
+       )
+  return profileBody
+}
+
+// Create a hexagonal shape used for bolt and nut heads
+fn hexagonFn(plane, radius) {
+  shape = startProfile(plane, at = [-radius, 0])
+    |> angledLine(angle = 60, length = radius)
+    |> xLine(length = radius)
+    |> angledLine(angle = -60, length = radius)
+    |> angledLine(angle = -120, length = radius)
+    |> xLine(length = -radius)
+    |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+    |> close()
+  return shape
+}
+
+// Build a bolt with a hexagonal head and cylindrical shaft
+fn boltFn(diameter, length) {
+  boltHeadPlane = startSketchOn(XY)
+  boltHeadShape = hexagonFn(plane = boltHeadPlane, radius = diameter)
+  boltHeadBody = extrude(boltHeadShape, length = diameter * 0.7)
+  boltPlane = startSketchOn(boltHeadBody, face = START)
+  boltShape = circle(boltPlane, center = [0, 0], radius = diameter / 2)
+  boltBody = extrude(boltShape, length = length)
+  return boltBody
+}
+
+// Construct a bolt assembly with base plate and hex nut
+// Assembles all parts for realistic anchor simulation
+fn boltWithPlateAndNutFn(diameter, length, gap) {
+  plateSide = diameter * 3
+  plateplane = startSketchOn(offsetPlane(XY, offset = -gap))
+  plateShape = startProfile(plateplane, at = [-plateSide / 2, -plateSide / 2])
+    |> yLine(length = plateSide)
+    |> xLine(length = plateSide)
+    |> yLine(length = -plateSide)
+    |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+    |> close()
+  plateBody = extrude(plateShape, length = -diameter * 0.3)
+  nutPlane = startSketchOn(plateBody, face = START)
+  boltHeadShape = hexagonFn(plane = nutPlane, radius = 12)
+  boltHeadBody = extrude(boltHeadShape, length = diameter * 0.7)
+  boltBody = boltFn(diameter = diameter, length = gap + diameter + 3)
+  mergedBody = union([boltHeadBody, boltBody])
+  return mergedBody
+}
+
+// Generate the plate geometry with a vertical hook for slab attachment
+slabPlate = lProfileFn(
+  lengthBase = slabPlateBaseLength,
+  lengthHook = slabPlateHookLength,
+  width = slabPlateWidth,
+  thickness = slabPlateThickness,
+)
+
+// Define oblong holes for bolts, allowing positional adjustment
+wideHoleWidth = 12
+wideHoleLength = 60
+wideHoleOffset = 30
+
+// Two slots mirrored across the plate width
+wideHolePlane = startSketchOn(XY)
+wideHoleShape = startProfile(
+       wideHolePlane,
+       at = [
+         -(wideHoleLength - wideHoleWidth) / 2,
+         wideHoleWidth / 2
+       ],
+     )
+  |> xLine(length = wideHoleLength - wideHoleWidth)
+  |> tangentialArc(endAbsolute = [
+       (wideHoleLength - wideHoleWidth) / 2,
+       -wideHoleWidth / 2
+     ])
+  |> xLine(length = wideHoleWidth - wideHoleLength)
+  |> tangentialArc(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close()
+  |> translate(
+       %,
+       x = offsetSlabRail,
+       y = wideHoleOffset - (slabPlateWidth / 2),
+       z = -1,
+     )
+wideHoleVoidLeft = extrude(wideHoleShape, length = slabPlateThickness + 2)
+wideHoleVoidRight = clone(wideHoleVoidLeft)
+  |> translate(
+       %,
+       x = 0,
+       y = slabPlateWidth - (wideHoleOffset * 2),
+       z = 0,
+     )
+
+// Cut the holes into the anchor plate body
+slabPlatePunchOne = subtract([slabPlate], tools = [wideHoleVoidLeft])
+slabPlatePunchTwo = subtract([slabPlatePunchOne], tools = [wideHoleVoidRight])
+
+// Add two bolt assemblies into the oblong slots
+// Properly rotated and spaced to match anchor hole layout
+slabPlateBolts = boltWithPlateAndNutFn(diameter = 10, length = 20, gap = slabPlateThickness + 5)
+  |> rotate(
+       %,
+       roll = 180,
+       pitch = 0,
+       yaw = 0,
+     )
+  |> translate(
+       %,
+       x = offsetSlabRail,
+       y = wideHoleOffset - (slabPlateWidth / 2),
+       z = 5,
+     )
+  |> patternLinear3d(
+       %,
+       instances = 2,
+       distance = slabPlateWidth - (wideHoleOffset * 2),
+       axis = [0, -1, 0],
+     )

public/kcl-samples/engine-valve/main.kcl

@@ -0,0 +1,79 @@
+// Engine Valve
+// A mechanical valve used in internal combustion engines to control intake or exhaust flow
+
+
+
+
+@settings(defaultLengthUnit = mm, kclVersion = 1.0)
+
+// Define parameters
+valveDiameter = 30
+valveLength = 120
+valveHeadLength = valveDiameter * 1.0
+valveHeadThickness = 3
+stemDiameter = 6
+stemHeadLength = 9
+stemLength = valveLength - valveHeadLength - stemHeadLength
+
+// Create the valve head
+valveRadius = valveDiameter / 2
+valveHeadPlane = startSketchOn(XZ)
+valveHeadShape = startProfile(valveHeadPlane, at = [-0.01, valveHeadLength])
+  |> xLine(length = 0.01 - (stemDiameter / 2))
+  |> line(endAbsolute = [0.01 - (stemDiameter / 2), valveRadius])
+  |> tangentialArc(endAbsolute = [-0.8 * valveRadius, valveHeadThickness], tag = $seg01)
+  |> tangentialArc(endAbsolute = [-valveRadius, 0])
+  |> xLine(length = 0.3 * valveRadius)
+  |> arc(
+       interiorAbsolute = [
+         -0.34 * valveRadius,
+         0.08 * valveRadius
+       ],
+       endAbsolute = [
+         -0.02 * valveRadius,
+         0.11 * valveRadius
+       ],
+     )
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close()
+valveHead = revolve(valveHeadShape, angle = 360, axis = Y)
+
+// Create the valve stem
+valveStemSketch = startSketchOn(offsetPlane(XY, offset = valveHeadLength))
+  |> circle(center = [0, 0], radius = stemDiameter / 2)
+  |> extrude(length = stemLength - valveHeadLength - stemHeadLength)
+
+// Create the valve stem end
+stepLength = stemHeadLength / 10
+step1 = startSketchOn(valveStemSketch, face = END)
+  |> circle(%, center = [0, 0], radius = stemDiameter / 2 * 0.9)
+  |> extrude(%, length = stepLength * 2)
+step2 = startSketchOn(step1, face = END)
+  |> circle(%, center = [0, 0], radius = stemDiameter / 2 * 0.8)
+  |> extrude(%, length = stepLength)
+step3 = startSketchOn(step2, face = END)
+  |> circle(%, center = [0, 0], radius = stemDiameter / 2 * 0.9)
+  |> extrude(%, length = stepLength)
+step4 = startSketchOn(step3, face = END)
+  |> circle(%, center = [0, 0], radius = stemDiameter / 2 * 0.8)
+  |> extrude(%, length = stepLength)
+step5 = startSketchOn(step4, face = END)
+  |> circle(%, center = [0, 0], radius = stemDiameter / 2 * 0.9)
+  |> extrude(%, length = stepLength)
+step6 = startSketchOn(step5, face = END)
+  |> circle(%, center = [0, 0], radius = stemDiameter / 2 * 0.8)
+  |> extrude(%, length = stepLength)
+step7 = startSketchOn(step6, face = END)
+  |> circle(
+       %,
+       center = [0, 0],
+       radius = stemDiameter / 2 * 0.9,
+       tag = $seg02,
+     )
+  |> extrude(%, length = stepLength * 3, tagEnd = $capEnd001)
+  |> chamfer(
+       length = 0.5,
+       tags = [
+         getCommonEdge(faces = [seg02, capEnd001])
+       ],
+     )

public/kcl-samples/manifest.json

@@ -74,6 +74,16 @@
       "main.kcl"
     ]
   },
+  {
+    "file": "main.kcl",
+    "pathFromProjectDirectoryToFirstFile": "brake-rotor/main.kcl",
+    "multipleFiles": false,
+    "title": "A 320mm vented brake disc (rotor), with straight vanes, 30mm thick. The disc bell should accommodate 5 M12 wheel studs on a 114.3mm pitch circle diameter.",
+    "description": "",
+    "files": [
+      "main.kcl"
+    ]
+  },
   {
     "file": "main.kcl",
     "pathFromProjectDirectoryToFirstFile": "car-wheel-assembly/main.kcl",
@@ -147,6 +157,16 @@
       "removable-sticker.kcl"
     ]
   },
+  {
+    "file": "main.kcl",
+    "pathFromProjectDirectoryToFirstFile": "curtain-wall-anchor-plate/main.kcl",
+    "multipleFiles": false,
+    "title": "Curtain Wall Anchor Plate",
+    "description": "A structural steel L-plate used to anchor curtain wall systems to concrete slabs, with elongated holes for adjustability and bolts with nuts and base plates for secure fastening",
+    "files": [
+      "main.kcl"
+    ]
+  },
   {
     "file": "main.kcl",
     "pathFromProjectDirectoryToFirstFile": "cycloidal-gear/main.kcl",
@@ -177,6 +197,16 @@
       "main.kcl"
     ]
   },
+  {
+    "file": "main.kcl",
+    "pathFromProjectDirectoryToFirstFile": "engine-valve/main.kcl",
+    "multipleFiles": false,
+    "title": "Engine Valve",
+    "description": "A mechanical valve used in internal combustion engines to control intake or exhaust flow",
+    "files": [
+      "main.kcl"
+    ]
+  },
   {
     "file": "main.kcl",
     "pathFromProjectDirectoryToFirstFile": "exhaust-manifold/main.kcl",
@@ -422,6 +452,16 @@
       "robot-rotating-base.kcl"
     ]
   },
+  {
+    "file": "main.kcl",
+    "pathFromProjectDirectoryToFirstFile": "pdu-faceplate/main.kcl",
+    "multipleFiles": false,
+    "title": "Power Distribution Unit (PDU) faceplate with European plug sockets and switch",
+    "description": "Designed for standard 19-inch rack systems with 1U height and 8 sockets",
+    "files": [
+      "main.kcl"
+    ]
+  },
   {
     "file": "main.kcl",
     "pathFromProjectDirectoryToFirstFile": "pillow-block-bearing/main.kcl",
@@ -512,6 +552,16 @@
       "main.kcl"
     ]
   },
+  {
+    "file": "main.kcl",
+    "pathFromProjectDirectoryToFirstFile": "sash-window/main.kcl",
+    "multipleFiles": false,
+    "title": "Sash Window",
+    "description": "A traditional wooden sash window with two vertically sliding panels and a central locking mechanism",
+    "files": [
+      "main.kcl"
+    ]
+  },
   {
     "file": "main.kcl",
     "pathFromProjectDirectoryToFirstFile": "sheet-metal-bracket/main.kcl",
@@ -522,6 +572,16 @@
       "main.kcl"
     ]
   },
+  {
+    "file": "main.kcl",
+    "pathFromProjectDirectoryToFirstFile": "shepherds-hook-bolt/main.kcl",
+    "multipleFiles": false,
+    "title": "Shepherd’s Hook Bolt",
+    "description": "A bent bolt with a curved hook, typically used for hanging or anchoring loads. The threaded end allows secure attachment to surfaces or materials, while the curved hook resists pull-out under tension.",
+    "files": [
+      "main.kcl"
+    ]
+  },
   {
     "file": "main.kcl",
     "pathFromProjectDirectoryToFirstFile": "socket-head-cap-screw/main.kcl",
@@ -532,6 +592,16 @@
       "main.kcl"
     ]
   },
+  {
+    "file": "main.kcl",
+    "pathFromProjectDirectoryToFirstFile": "spinning-highrise-tower/main.kcl",
+    "multipleFiles": false,
+    "title": "Spinning Highrise Tower",
+    "description": "A conceptual high-rise tower with a central core and rotating floor slabs, demonstrating dynamic form through vertical repetition and transformation",
+    "files": [
+      "main.kcl"
+    ]
+  },
   {
     "file": "main.kcl",
     "pathFromProjectDirectoryToFirstFile": "spur-gear/main.kcl",
@@ -562,6 +632,16 @@
       "main.kcl"
     ]
   },
+  {
+    "file": "main.kcl",
+    "pathFromProjectDirectoryToFirstFile": "thermal-block-insert/main.kcl",
+    "multipleFiles": false,
+    "title": "Thermal Block Insert",
+    "description": "Interlocking insulation insert for masonry walls, designed with a tongue-and-groove profile for modular alignment and thermal efficiency",
+    "files": [
+      "main.kcl"
+    ]
+  },
   {
     "file": "main.kcl",
     "pathFromProjectDirectoryToFirstFile": "tooling-nest-block/main.kcl",

public/kcl-samples/pdu-faceplate/main.kcl

@@ -0,0 +1,240 @@
+// Power Distribution Unit (PDU) faceplate with European plug sockets and switch
+// Designed for standard 19-inch rack systems with 1U height and 8 sockets
+
+// Set units in millimeters (mm)
+@settings(defaultLengthUnit = mm, kclVersion = 1.0)
+
+// Define the dimensions
+// Width fits standard 19” rack, height is 1U, depth is variable
+faceplateWidth = 482.6 // this is standardized to fit 19-inch racks)
+faceplateHeight = 44.45 // usually 1U (44.45 mm), but can be 2U (88.9 mm) or more
+faceplateDepth = 100 // varies by manufacturer, but commonly between 100 mm and 300 mm
+
+
+// Define dimensions of side supports (width and thickness)
+supportWidth = 50
+supportThickness = 3
+
+// Main body of the PDU faceplate with integrated rack mounting flanges
+faceplateShape = startSketchOn(offsetPlane(XY, offset = -faceplateHeight / 2))
+  |> startProfile(%, at = [-faceplateWidth / 2 - supportWidth, 0])
+  |> yLine(length = supportThickness)
+  |> xLine(length = supportWidth)
+  |> yLine(length = faceplateDepth - supportThickness)
+  |> xLine(length = faceplateWidth)
+  |> yLine(length = supportThickness - faceplateDepth)
+  |> xLine(length = supportWidth)
+  |> yLine(length = -supportThickness)
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)], tag = $seg01)
+  |> close()
+faceplateBody = extrude(faceplateShape, length = faceplateHeight)
+faceplateFrontFace = startSketchOn(faceplateBody, face = seg01)
+
+// Creates recessed volume within the faceplate for inserting modules
+nestWall = 2
+nestWidth = faceplateWidth - (nestWall * 2)
+nestHeight = faceplateHeight - (nestWall * 2)
+nestDepth = faceplateDepth - nestWall
+nestShape = startProfile(faceplateFrontFace, at = [-nestWidth / 2, nestHeight / 2])
+  |> xLine(length = nestWidth)
+  |> yLine(length = -nestHeight)
+  |> xLine(length = -nestWidth)
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close()
+nestVoid = extrude(nestShape, length = -nestDepth)
+
+// Spacer block on the left side, used to position components correctly
+moduleHeight = nestHeight
+moduleWidth = nestHeight
+moduleDepth = nestHeight
+
+leftSpacerWidth = moduleWidth * 1.5
+leftSpacerPosition = leftSpacerWidth / 2 - (nestWidth / 2)
+
+fn boxModuleFn(width) {
+  shape = startSketchOn(XZ)
+    |> startProfile(%, at = [-width / 2, moduleHeight / 2])
+    |> xLine(length = width)
+    |> yLine(length = -moduleHeight)
+    |> xLine(length = -width)
+    |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+    |> close()
+  body = extrude(shape, length = -moduleDepth)
+  return body
+}
+leftSpacerShape = boxModuleFn(width = leftSpacerWidth)
+  |> translate(
+       %,
+       x = leftSpacerPosition,
+       y = 0,
+       z = 0,
+     )
+
+// Module for power switch including front plate and red rocker button
+switchPosition = leftSpacerPosition + leftSpacerWidth / 2 + moduleWidth / 2
+swtichWidth = moduleWidth
+
+// Switch Body
+switchBody = boxModuleFn(width = moduleWidth)
+
+// Switch Plate
+swtichPlateWidth = 20
+switchPlateHeight = 30
+switchPlateThickness = 3
+switchPlateShape = startSketchOn(switchBody, face = END)
+  |> startProfile(
+       %,
+       at = [
+         -swtichPlateWidth / 2,
+         -switchPlateHeight / 2
+       ],
+     )
+  |> yLine(length = switchPlateHeight)
+  |> xLine(length = swtichPlateWidth)
+  |> yLine(length = -switchPlateHeight)
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close()
+switchPlateBody = extrude(switchPlateShape, length = switchPlateThickness)
+  |> translate(
+       %,
+       x = switchPosition,
+       y = 0,
+       z = 0,
+     )
+
+// Switch Button
+switchButtonHeight = 26
+swtichButtonWidth = 15
+switchButtonShape = startSketchOn(offsetPlane(-YZ, offset = -swtichButtonWidth / 2))
+  |> startProfile(
+       %,
+       at = [
+         switchPlateThickness,
+         switchButtonHeight / 2
+       ],
+     )
+  |> line(end = [3, -1])
+  |> arc(interiorAbsolute = [6, 0], endAbsolute = [12, -9])
+  |> line(endAbsolute = [
+       switchPlateThickness,
+       -switchButtonHeight / 2
+     ])
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close()
+switchButtonBody = extrude(switchButtonShape, length = swtichButtonWidth)
+  |> translate(
+       %,
+       x = switchPosition,
+       y = 0,
+       z = 0,
+     )
+  |> appearance(%, color = "#ff0000")
+
+// Spacer between switch and plug modules for layout alignment
+secondSpacerWidth = moduleWidth / 2
+secondSpacerPosition = switchPosition + swtichWidth / 2 + secondSpacerWidth / 2
+secondSpacerBody = boxModuleFn(width = secondSpacerWidth)
+  |> translate(
+       %,
+       x = secondSpacerPosition,
+       y = 0,
+       z = 0,
+     )
+
+  // European power plug modules with circular sockets and two-pin holes
+// 8 identical sockets, each with grounding notch and dual-pin recesses
+powerPlugWidth = moduleWidth
+powerPlugCount = 8
+powerPlugOveralWidth = powerPlugWidth * powerPlugCount
+firstPowerPlugPosition = secondSpacerPosition + secondSpacerWidth / 2 + powerPlugWidth / 2
+lastPowerPlugPosition = firstPowerPlugPosition + powerPlugWidth * (powerPlugCount - 1)
+powerPlugBody = boxModuleFn(width = powerPlugWidth)
+  |> translate(
+       %,
+       x = firstPowerPlugPosition,
+       y = 0,
+       z = 0,
+     )
+plugShape = startSketchOn(powerPlugBody, face = END)
+  |> circle(%, center = [0, 0], radius = 17)
+  |> translate(
+       %,
+       x = firstPowerPlugPosition,
+       y = 0,
+       z = 0,
+     )
+plugBody = extrude(plugShape, length = -20)
+plugHoleDistance = 20
+plugHoleShape = startSketchOn(plugBody, face = START)
+  |> circle(%, center = [-plugHoleDistance / 2, 0], radius = 3)
+  |> translate(
+       %,
+       x = firstPowerPlugPosition,
+       y = 0,
+       z = 0,
+     )
+  |> patternLinear2d(
+       %,
+       instances = 2,
+       distance = plugHoleDistance,
+       axis = [1, 0],
+     )
+plugHoleBody = extrude(plugHoleShape, length = -5)
+  |> patternLinear3d(
+       %,
+       instances = powerPlugCount,
+       distance = powerPlugWidth,
+       axis = [1, 0, 0],
+     )
+
+// Rightmost spacer to fill in remaining horizontal space
+rightSpacerWidth = nestWidth / 2 - lastPowerPlugPosition - (powerPlugWidth / 2)
+rightSpacerPosition = lastPowerPlugPosition + powerPlugWidth / 2 + rightSpacerWidth / 2
+rightSpacerBody = boxModuleFn(width = rightSpacerWidth)
+  |> translate(
+       %,
+       x = rightSpacerPosition,
+       y = 0,
+       z = 0,
+     )
+
+// Rack mounting holes on flanges, elongated for alignment flexibility
+holeWidth = 25
+holeDiameter = 5
+holeStraightSegment = holeWidth - holeDiameter
+holeVerticalDistance = faceplateHeight * 0.3
+
+holeShapes = startProfile(
+       faceplateFrontFace,
+       at = [
+         -holeStraightSegment / 2,
+         holeDiameter / 2
+       ],
+     )
+  |> xLine(length = holeStraightSegment)
+  |> tangentialArc(endAbsolute = [
+       holeStraightSegment / 2,
+       -holeDiameter / 2
+     ])
+  |> xLine(length = -holeStraightSegment)
+  |> tangentialArc(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close()
+  |> translate(
+       %,
+       x = -faceplateWidth / 2 - (supportWidth / 2),
+       y = 0,
+       z = -holeVerticalDistance,
+     )
+  |> patternLinear2d(
+       %,
+       instances = 3,
+       distance = holeVerticalDistance,
+       axis = [0, 1],
+     )
+  |> patternLinear2d(
+       %,
+       instances = 2,
+       distance = faceplateWidth + supportWidth,
+       axis = [1, 0],
+     )
+holeVoid = extrude(holeShapes, length = -supportThickness)

public/kcl-samples/sash-window/main.kcl

@@ -0,0 +1,214 @@
+// Sash Window
+// A traditional wooden sash window with two vertically sliding panels and a central locking mechanism
+
+// Set units in millimeters (mm)
+@settings(defaultLengthUnit = mm, kclVersion = 1.0)
+
+// Window state: 0 for closed, 1 for open
+windowState = 0
+
+// Basic window dimensions
+windowWidth = 500
+windowHeight = 1000
+
+// Frame thickness and depth
+frameWidth = 30
+frameDepth = 50
+
+// Number of divisions per sash (horizontal and vertical)
+sashOpeningCountHorizontal = 2
+sashOpeningCountVertical = 1
+
+// Derived dimensions
+sashWidth = windowWidth - (frameWidth * 2)
+sashHeight = (windowHeight - (frameWidth * 2)) / 2 + frameWidth / 2
+sashDepth = frameDepth / 2 - 2
+sashTravelDistance = sashHeight * windowState * 0.8
+
+// Function to create panel with frame and openings
+fn panelFn(plane, offset, width, height, depth, perimeter, divisionThickness, openingCountHorizontal, openingCountVertical) {
+  // Create panel base shape
+  panelPlane = startSketchOn(offsetPlane(XZ, offset = offset))
+  panelShape = startProfile(panelPlane, at = [-width / 2, -height / 2])
+    |> yLine(length = height)
+    |> xLine(length = width)
+    |> yLine(length = -height)
+    |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+    |> close()
+  panelBody = extrude(panelShape, length = depth)
+
+  // Create opening grid within the panel
+  voidAreaWidth = width - (perimeter * 2)
+  voidAreaHeight = height - (perimeter * 2)
+
+  divisionTotalThicknessHorizontal = divisionThickness * openingCountHorizontal - divisionThickness
+  divisionTotalThicknessVertical = divisionThickness * openingCountVertical - divisionThickness
+  voidWidth = (voidAreaWidth - divisionTotalThicknessHorizontal) / openingCountHorizontal
+  voidHeight = (voidAreaHeight - divisionTotalThicknessVertical) / openingCountVertical
+
+  voidStepHorizontal = voidWidth + divisionThickness
+  voidStepVertical = voidHeight + divisionThickness
+  voidPlane = startSketchOn(panelBody, face = END)
+  voidShape = startProfile(
+         voidPlane,
+         at = [
+           -voidAreaWidth / 2,
+           -voidAreaHeight / 2
+         ],
+       )
+    |> yLine(length = voidHeight)
+    |> xLine(length = voidWidth)
+    |> yLine(length = -voidHeight)
+    |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+    |> close()
+    |> patternLinear2d(
+         %,
+         instances = openingCountHorizontal,
+         distance = voidStepHorizontal,
+         axis = [1, 0],
+       )
+    |> patternLinear2d(
+         %,
+         instances = openingCountVertical,
+         distance = voidStepVertical,
+         axis = [0, 1],
+       )
+  voidBody = extrude(voidShape, length = -depth)
+    |> appearance(color = "#a55e2c")
+  return panelBody
+}
+
+// Create main window frame
+frame = panelFn(
+  plane = XZ,
+  offset = -frameDepth / 2,
+  width = windowWidth,
+  height = windowHeight,
+  depth = frameDepth,
+  perimeter = frameWidth,
+  divisionThickness = 10,
+  openingCountHorizontal = 1,
+  openingCountVertical = 1,
+)
+
+// Create bottom sliding sash
+bottomSash = panelFn(
+       plane = XZ,
+       offset = (frameDepth / 2 - sashDepth) / 2,
+       width = sashWidth,
+       height = sashHeight,
+       depth = sashDepth,
+       perimeter = frameWidth,
+       divisionThickness = 10,
+       openingCountHorizontal = sashOpeningCountHorizontal,
+       openingCountVertical = sashOpeningCountVertical,
+     )
+  |> translate(
+       %,
+       x = 0,
+       y = 0,
+       z = frameWidth / 2 - (sashHeight / 2),
+     )
+  |> translate(
+       %,
+       x = 0,
+       y = 0,
+       z = sashTravelDistance,
+     ) // open / close
+
+  // Latch mechanism on bottom sash
+// Create latch plate
+latchPlateWidth = 13
+latchPlateLength = 30
+latchPlateThickness = 1
+
+latchPlatePlane = startSketchOn(offsetPlane(XY, offset = frameWidth / 2))
+latchPlateShape = startProfile(
+       latchPlatePlane,
+       at = [
+         -latchPlateLength / 2,
+         -latchPlateWidth / 2
+       ],
+     )
+  |> yLine(length = latchPlateWidth)
+  |> xLine(length = latchPlateLength)
+  |> yLine(length = -latchPlateWidth)
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close()
+latchPlateBody = extrude(latchPlateShape, length = latchPlateThickness)
+  |> translate(
+       %,
+       x = 0,
+       y = -frameDepth / 4,
+       z = 0,
+     )
+  |> translate(
+       %,
+       x = 0,
+       y = 0,
+       z = sashTravelDistance,
+     ) // open / close
+
+// Create latch cylinder
+latchCylinderHeight = 5
+latchCylinderPlane = startSketchOn(offsetPlane(latchPlatePlane, offset = latchPlateThickness))
+latchCylinderShape = startProfile(latchCylinderPlane, at = [40, -1])
+  |> xLine(length = -35)
+  |> arc(interiorAbsolute = [-5, 0], endAbsolute = [5, 1])
+  |> xLine(length = 35)
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close()
+latchCylinderBody = extrude(latchCylinderShape, length = latchCylinderHeight)
+  |> translate(
+       %,
+       x = 0,
+       y = -frameDepth / 4,
+       z = 0,
+     )
+  |> translate(
+       %,
+       x = 0,
+       y = 0,
+       z = sashTravelDistance,
+     ) // open / close
+  |> rotate(
+       %,
+       roll = 0,
+       pitch = 0,
+       yaw = -90 * windowState,
+     )
+
+// Create top fixed sash
+topSash = panelFn(
+       plane = XZ,
+       offset = -(frameDepth / 2 - sashDepth) / 2 - sashDepth,
+       width = sashWidth,
+       height = sashHeight,
+       depth = sashDepth,
+       perimeter = frameWidth,
+       divisionThickness = 10,
+       openingCountHorizontal = sashOpeningCountHorizontal,
+       openingCountVertical = sashOpeningCountVertical,
+     )
+  |> translate(
+       %,
+       x = 0,
+       y = 0,
+       z = sashHeight / 2 - (frameWidth / 2),
+     )
+
+// Create latch nut on the top sash
+latchNutPlane = startSketchOn(XZ)
+latchNutShape = startProfile(
+       latchNutPlane,
+       at = [
+         -latchPlateLength / 2,
+         -latchPlateWidth / 2
+       ],
+     )
+  |> yLine(length = latchPlateWidth)
+  |> xLine(length = latchPlateLength)
+  |> yLine(length = -latchPlateWidth)
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close()
+latchNutPlateBody = extrude(latchNutShape, length = latchPlateThickness)

public/kcl-samples/shepherds-hook-bolt/main.kcl

@@ -0,0 +1,89 @@
+// Shepherd’s Hook Bolt
+// A bent bolt with a curved hook, typically used for hanging or anchoring loads. The threaded end allows secure attachment to surfaces or materials, while the curved hook resists pull-out under tension.
+
+// Set units in millimeters (mm)
+@settings(defaultLengthUnit = mm, kclVersion = 1.0)
+
+// Define bolt geometry parameters
+boltDiameter = 5
+hookRadius = 12
+shankLength = 5
+threadedEndLength = 30
+nutDistance = 20
+hookStartAngle = 290
+hookEndAngle = 150
+
+approximatePitch = boltDiameter * 0.15
+threadDepth = 0.6134 * approximatePitch
+innerRadius = boltDiameter / 2 - threadDepth
+boltNumberOfRevolutions = threadedEndLength / approximatePitch
+
+// Helper values for computing geometry transitions between straight shaft and hook arc
+hypotenuse = hookRadius / cos(hookStartAngle - 270)
+side = sqrt(pow(hypotenuse, exp = 2) - pow(hookRadius, exp = 2))
+shankOffset = hypotenuse + side
+
+// Converts polar coordinates to cartesian points for drawing arcs
+fn polarToCartesian(radius, angle) {
+  x = radius * cos(angle)
+  y = radius * sin(angle)
+  return [x, y]
+}
+
+// Create the hook and shank profile path
+// Includes straight segment and two connected arcs forming the hook
+hookProfilePlane = startSketchOn(XZ)
+hookProfileShape = startProfile(hookProfilePlane, at = [0, -shankOffset - shankLength])
+  |> line(endAbsolute = [0, -shankOffset])
+  |> tangentialArc(endAbsolute = polarToCartesian(radius = hookRadius, angle = hookStartAngle))
+  |> tangentialArc(endAbsolute = polarToCartesian(radius = hookRadius, angle = hookEndAngle), tag = $hook)
+
+// Create the circular cross-section used for sweeping along the hook path
+hookSectionPlane = offsetPlane(XY, offset = -shankOffset - shankLength)
+hookSectionShape = circle(hookSectionPlane, center = [0, 0], radius = boltDiameter / 2)
+
+// Sweep the section along the hook profile to form the main body of the hook bolt
+hookBody = sweep(hookSectionShape, path = hookProfileShape, sectional = true)
+
+// Add a cylindrical tip at the hook end
+tipPlane = startSketchOn(hookBody, face = END)
+tipShape = circle(
+  tipPlane,
+  center = [hookRadius, 0],
+  radius = boltDiameter / 2,
+  tag = $seg01,
+)
+tipBody = extrude(
+       tipShape,
+       length = hookRadius * 0.5,
+       tagStart = $startTag,
+       tagEnd = $capEnd001,
+     )
+  |> fillet(
+       radius = boltDiameter / 4,
+       tags = [
+         getCommonEdge(faces = [seg01, capEnd001])
+       ],
+     )
+
+  // Create the threaded end of the bolt
+
+// Construct the triangular profile for thread cutting
+boltThreadSectionPlane = startSketchOn(XZ)
+boltThreadSectionShapeForRevolve = startProfile(
+       boltThreadSectionPlane,
+       at = [
+         innerRadius,
+         -shankOffset - shankLength - threadedEndLength
+       ],
+     )
+  |> line(end = [threadDepth, approximatePitch / 2])
+  |> line(end = [-threadDepth, approximatePitch / 2])
+  |> patternLinear2d(axis = [0, 1], instances = boltNumberOfRevolutions, distance = approximatePitch)
+  |> xLine(length = -innerRadius * 0.9)
+  |> yLine(length = -threadedEndLength)
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close()
+
+// Create a revolved solid representing the thread geometry by repeating and revolving the profile around the shaft
+boltThreadRevolve = revolve(boltThreadSectionShapeForRevolve, angle = 360, axis = Y)

public/kcl-samples/spinning-highrise-tower/main.kcl

@@ -0,0 +1,93 @@
+// Spinning Highrise Tower
+// A conceptual high-rise tower with a central core and rotating floor slabs, demonstrating dynamic form through vertical repetition and transformation
+
+
+
+
+@settings(defaultLengthUnit = m, kclVersion = 1.0)
+
+// Define global parameters for floor geometry and building layout
+floorCount = 17
+floorHeight = 5
+slabWidth = 30
+slabThickness = 0.5
+rotationAngleStep = 5
+handrailHeight = 1.2
+handrailThickness = 0.3
+balconyDepth = 3
+
+// Calculate facade and core geometry from parameters
+facadeWidth = slabWidth - (balconyDepth * 2)
+facadeHeight = floorHeight - slabThickness
+coreHeight = floorCount * floorHeight - slabThickness
+frameSide = 0.1
+windowTargetWidth = 6
+windowTargetCount = facadeWidth / windowTargetWidth
+windowCount = round(windowTargetCount)
+windowWidth = facadeWidth / windowCount
+
+// Helper function: Creates a box from a center plane with given width and height
+fn boxFn(plane, width, height) {
+  shape = startSketchOn(plane)
+    |> startProfile(%, at = [-width / 2, -width / 2])
+    |> line(%, end = [0, width])
+    |> line(%, end = [width, 0])
+    |> line(%, end = [0, -width])
+    |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+    |> close(%)
+  body = extrude(shape, length = height)
+  return body
+}
+
+// Helper function: Defines transformation (translation and rotation) for each floor
+fn transformFn(@i) {
+  return {
+    translate = [0, 0, i * floorHeight],
+    rotation = { angle = rotationAngleStep * i }
+  }
+}
+
+// Create building base
+baseThickness = 0.2
+baseSlab = boxFn(plane = XY, width = slabWidth, height = -baseThickness)
+  |> appearance(%, color = "#dbd7d2")
+
+// Create ground platform beneath the base
+goundSize = 50
+groundBody = boxFn(plane = offsetPlane(XY, offset = -baseThickness), width = goundSize, height = -5)
+  |> appearance(%, color = "#3a3631")
+
+// Create a single slab with handrail height to be reused with pattern
+slabAndHandrailGeometry = boxFn(plane = offsetPlane(XY, offset = floorHeight - slabThickness), width = slabWidth, height = slabThickness + handrailHeight)
+slabVoidStart = -slabWidth / 2 + handrailThickness
+slabVoidWidth = slabWidth - (handrailThickness * 2)
+slabVoidShape = startSketchOn(slabAndHandrailGeometry, face = END)
+  |> startProfile(%, at = [slabVoidStart, slabVoidStart])
+  |> line(%, end = [0, slabVoidWidth])
+  |> line(%, end = [slabVoidWidth, 0])
+  |> line(%, end = [0, -slabVoidWidth])
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close(%)
+
+// Generate and pattern slabs with voids across all floors
+slabBody = extrude(slabVoidShape, length = -handrailHeight)
+  |> patternTransform(instances = floorCount, transform = transformFn)
+  |> appearance(%, color = "#dbd7d2")
+
+// Create structural core of the tower
+coreLength = 10
+coreWidth = 8
+core = startSketchOn(XY)
+  |> startProfile(%, at = [-coreLength / 2, -coreWidth / 2])
+  |> line(%, end = [0, coreWidth])
+  |> line(%, end = [coreLength, 0])
+  |> line(%, end = [-0.22, -coreWidth])
+  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
+  |> close(%)
+  |> extrude(%, length = coreHeight)
+
+// Create facade panels for each floor
+facadeStart = facadeWidth / 2
+facadeGeometry = boxFn(plane = XY, width = facadeWidth, height = facadeHeight)
+  |> patternTransform(instances = floorCount, transform = transformFn)
+  |> appearance(%, color = "#151819")

public/kcl-samples/thermal-block-insert/main.kcl

@@ -0,0 +1,61 @@
+// Thermal Block Insert
+// Interlocking insulation insert for masonry walls, designed with a tongue-and-groove profile for modular alignment and thermal efficiency
+
+// Set units in millimeters (mm)
+@settings(defaultLengthUnit = mm, kclVersion = 1.0)
+
+// Define overall dimensions of the insert block
+insertLength = 400
+insertHeight = 200
+insertThickness = 50
+
+// Define tongue-and-groove profile parameters for interlocking geometry
+setbackFactor = 0.25 // spacing between tongues
+tongueTargetCount = insertLength / 80
+tongueCount = round(tongueTargetCount)
+tongueLength = insertLength / (tongueCount * (1 + setbackFactor * 2) + 1)
+tongueGap = tongueLength * setbackFactor * 2
+tongueStep = tongueLength + tongueGap
+tongueDepth = tongueLength * 0.5
+tongueSetback = tongueLength * setbackFactor
+
+// Function to create one side of the repeating tongue geometry along the block edge
+fn tongueBlockFn() {
+  tongueSingleBlock = xLine(length = tongueLength)
+    |> line(end = [-tongueSetback, tongueDepth])
+    |> xLine(length = tongueLength)
+    |> line(end = [-tongueSetback, -tongueDepth])
+    |> patternLinear2d(
+         %,
+         instances = tongueCount,
+         distance = tongueStep,
+         axis = [1, 0],
+       )
+    |> xLine(length = tongueLength)
+  return tongueSingleBlock
+}
+
+// Create top-side profile with tongues
+tongueShape = startSketchOn(XY)
+  |> startProfile(%, at = [-insertLength / 2, insertThickness / 2])
+  |> tongueBlockFn()
+  |> yLine(length = -insertThickness / 2)
+  |> xLine(length = -insertLength)
+  |> close(%)
+
+// Create bottom-side profile with grooves (inverse of tongue)
+grooveShape = startSketchOn(XY)
+  |> startProfile(
+       %,
+       at = [
+         -insertLength / 2,
+         -insertThickness / 2 - tongueDepth
+       ],
+     )
+  |> tongueBlockFn()
+  |> yLine(length = insertThickness / 2 + tongueDepth)
+  |> xLine(length = -insertLength)
+  |> close(%)
+
+// Extrude both tongue and groove profiles to form the final thermal insert block
+insertShape = extrude([tongueShape, grooveShape], length = insertHeight)

rust/Cargo.lock

@@ -1815,7 +1815,7 @@ dependencies = [
 
 [[package]]
 name = "kcl-bumper"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
  "anyhow",
  "clap",
@@ -1826,7 +1826,7 @@ dependencies = [
 
 [[package]]
 name = "kcl-derive-docs"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
  "Inflector",
  "anyhow",
@@ -1845,7 +1845,7 @@ dependencies = [
 
 [[package]]
 name = "kcl-directory-test-macro"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
  "convert_case",
  "proc-macro2",
@@ -1855,7 +1855,7 @@ dependencies = [
 
 [[package]]
 name = "kcl-language-server"
-version = "0.2.74"
+version = "0.2.75"
 dependencies = [
  "anyhow",
  "clap",
@@ -1876,7 +1876,7 @@ dependencies = [
 
 [[package]]
 name = "kcl-language-server-release"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
  "anyhow",
  "clap",
@@ -1896,7 +1896,7 @@ dependencies = [
 
 [[package]]
 name = "kcl-lib"
-version = "0.2.74"
+version = "0.2.75"
 dependencies = [
  "anyhow",
  "approx 0.5.1",
@@ -1973,7 +1973,7 @@ dependencies = [
 
 [[package]]
 name = "kcl-python-bindings"
-version = "0.3.74"
+version = "0.3.75"
 dependencies = [
  "anyhow",
  "kcl-lib",
@@ -1988,7 +1988,7 @@ dependencies = [
 
 [[package]]
 name = "kcl-test-server"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
  "anyhow",
  "hyper 0.14.32",
@@ -2001,7 +2001,7 @@ dependencies = [
 
 [[package]]
 name = "kcl-to-core"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -2015,7 +2015,7 @@ dependencies = [
 
 [[package]]
 name = "kcl-wasm-lib"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
  "anyhow",
  "bson",

rust/kcl-bumper/Cargo.toml

@@ -1,7 +1,7 @@
 
 [package]
 name = "kcl-bumper"
-version = "0.1.74"
+version = "0.1.75"
 edition = "2021"
 repository = "https://github.com/KittyCAD/modeling-api"
 rust-version = "1.76"

rust/kcl-derive-docs/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "kcl-derive-docs"
 description = "A tool for generating documentation from Rust derive macros"
-version = "0.1.74"
+version = "0.1.75"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/KittyCAD/modeling-app"

rust/kcl-directory-test-macro/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "kcl-directory-test-macro"
 description = "A tool for generating tests from a directory of kcl files"
-version = "0.1.74"
+version = "0.1.75"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/KittyCAD/modeling-app"

rust/kcl-language-server-release/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "kcl-language-server-release"
-version = "0.1.74"
+version = "0.1.75"
 edition = "2021"
 authors = ["KittyCAD Inc <kcl@kittycad.io>"]
 publish = false

rust/kcl-language-server/Cargo.toml

@@ -2,7 +2,7 @@
 name = "kcl-language-server"
 description = "A language server for KCL."
 authors = ["KittyCAD Inc <kcl@kittycad.io>"]
-version = "0.2.74"
+version = "0.2.75"
 edition = "2021"
 license = "MIT"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

rust/kcl-lib/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "kcl-lib"
 description = "KittyCAD Language implementation and tools"
-version = "0.2.74"
+version = "0.2.75"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/KittyCAD/modeling-app"

rust/kcl-lib/e2e/executor/main.rs

@@ -2,7 +2,7 @@ mod cache;
 
 use kcl_lib::{
     test_server::{execute_and_export_step, execute_and_snapshot, execute_and_snapshot_no_auth},
-    ExecError,
+    BacktraceItem, ExecError, ModuleId, SourceRange,
 };
 
 /// The minimum permissible difference between asserted twenty-twenty images.
@@ -441,10 +441,15 @@ async fn kcl_test_import_file_doesnt_exist() {
 model = cube"#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert_eq!(err.message(), "File `thing.obj` does not exist.");
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"semantic: KclErrorDetails { source_ranges: [SourceRange([0, 18, 0])], message: "File `thing.obj` does not exist." }"#
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(0, 18, ModuleId::default()),
+            fn_name: None,
+        }]
     );
 }
 
@@ -519,10 +524,18 @@ import 'e2e/executor/inputs/cube.gltf'
 model = cube"#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"semantic: KclErrorDetails { source_ranges: [SourceRange([32, 70, 0])], message: "The given format does not match the file extension. Expected: `gltf`, Given: `obj`" }"#
+        err.message(),
+        "The given format does not match the file extension. Expected: `gltf`, Given: `obj`"
+    );
+    assert_eq!(
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(32, 70, ModuleId::default()),
+            fn_name: None,
+        }]
     );
 }
 
@@ -1666,10 +1679,15 @@ example = extrude(exampleSketch, length = 10)
 "#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert_eq!(err.message(), "Cannot have an x constrained angle of 90 degrees");
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"type: KclErrorDetails { source_ranges: [SourceRange([70, 111, 0])], message: "Cannot have an x constrained angle of 90 degrees" }"#
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(70, 111, ModuleId::default()),
+            fn_name: Some("angledLine".to_owned())
+        }]
     );
 }
 
@@ -1686,10 +1704,15 @@ example = extrude(exampleSketch, length = 10)
 "#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert_eq!(err.message(), "Cannot have an x constrained angle of 270 degrees");
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"type: KclErrorDetails { source_ranges: [SourceRange([70, 112, 0])], message: "Cannot have an x constrained angle of 270 degrees" }"#
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(70, 112, ModuleId::default()),
+            fn_name: Some("angledLine".to_owned())
+        }]
     );
 }
 
@@ -1706,10 +1729,15 @@ example = extrude(exampleSketch, length = 10)
 "#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert_eq!(err.message(), "Cannot have a y constrained angle of 0 degrees");
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"type: KclErrorDetails { source_ranges: [SourceRange([70, 110, 0])], message: "Cannot have a y constrained angle of 0 degrees" }"#
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(70, 110, ModuleId::default()),
+            fn_name: Some("angledLine".to_owned())
+        }]
     );
 }
 
@@ -1726,10 +1754,15 @@ example = extrude(exampleSketch, length = 10)
 "#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert_eq!(err.message(), "Cannot have a y constrained angle of 180 degrees");
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"type: KclErrorDetails { source_ranges: [SourceRange([70, 112, 0])], message: "Cannot have a y constrained angle of 180 degrees" }"#
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(70, 112, ModuleId::default()),
+            fn_name: Some("angledLine".to_owned())
+        }]
     );
 }
 
@@ -1746,10 +1779,15 @@ extrusion = extrude(sketch001, length = 10)
 "#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert_eq!(err.message(), "Cannot have an x constrained angle of 90 degrees");
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"type: KclErrorDetails { source_ranges: [SourceRange([66, 116, 0])], message: "Cannot have an x constrained angle of 90 degrees" }"#
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(66, 116, ModuleId::default()),
+            fn_name: Some("angledLine".to_owned())
+        }]
     );
 }
 
@@ -1757,7 +1795,7 @@ extrusion = extrude(sketch001, length = 10)
 async fn kcl_test_angled_line_of_x_length_270() {
     let code = r#"sketch001 = startSketchOn(XZ)
   |> startProfile(at = [0, 0])
-  |> angledLine(angle = 90, lengthX = 90, tag = $edge1)
+  |> angledLine(angle = 270, lengthX = 90, tag = $edge1)
   |> angledLine(angle = -15, lengthX = -15, tag = $edge2)
   |> line(end = [0, -5])
   |> close(tag = $edge3)
@@ -1766,10 +1804,15 @@ extrusion = extrude(sketch001, length = 10)
 "#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert_eq!(err.message(), "Cannot have an x constrained angle of 270 degrees");
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"type: KclErrorDetails { source_ranges: [SourceRange([66, 116, 0])], message: "Cannot have an x constrained angle of 90 degrees" }"#
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(66, 117, ModuleId::default()),
+            fn_name: Some("angledLine".to_owned())
+        }]
     );
 }
 
@@ -1788,10 +1831,15 @@ example = extrude(exampleSketch, length = 10)
 "#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert_eq!(err.message(), "Cannot have a y constrained angle of 0 degrees");
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"type: KclErrorDetails { source_ranges: [SourceRange([95, 130, 0])], message: "Cannot have a y constrained angle of 0 degrees" }"#
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(95, 130, ModuleId::default()),
+            fn_name: Some("angledLine".to_owned())
+        }]
     );
 }
 
@@ -1810,10 +1858,15 @@ example = extrude(exampleSketch, length = 10)
 "#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert_eq!(err.message(), "Cannot have a y constrained angle of 180 degrees");
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"type: KclErrorDetails { source_ranges: [SourceRange([95, 132, 0])], message: "Cannot have a y constrained angle of 180 degrees" }"#
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(95, 132, ModuleId::default()),
+            fn_name: Some("angledLine".to_owned())
+        }]
     );
 }
 
@@ -1832,10 +1885,15 @@ example = extrude(exampleSketch, length = 10)
 "#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert_eq!(err.message(), "Cannot have a y constrained angle of 180 degrees");
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"type: KclErrorDetails { source_ranges: [SourceRange([95, 133, 0])], message: "Cannot have a y constrained angle of 180 degrees" }"#
+        err.backtrace(),
+        vec![BacktraceItem {
+            source_range: SourceRange::new(95, 133, ModuleId::default()),
+            fn_name: Some("angledLine".to_owned())
+        }]
     );
 }
 
@@ -1849,10 +1907,31 @@ someFunction('INVALID')
 "#;
 
     let result = execute_and_snapshot(code, None).await;
-    assert!(result.is_err());
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
     assert_eq!(
-        result.err().unwrap().to_string(),
-        r#"semantic: KclErrorDetails { source_ranges: [SourceRange([46, 55, 0]), SourceRange([60, 83, 0])], message: "This function expected the input argument to be Solid or Plane but it's actually of type string" }"#
+        err.message(),
+        "This function expected the input argument to be Solid or Plane but it's actually of type string"
+    );
+    assert_eq!(
+        err.source_ranges(),
+        vec![
+            SourceRange::new(46, 55, ModuleId::default()),
+            SourceRange::new(60, 83, ModuleId::default()),
+        ]
+    );
+    assert_eq!(
+        err.backtrace(),
+        vec![
+            BacktraceItem {
+                source_range: SourceRange::new(46, 55, ModuleId::default()),
+                fn_name: Some("someFunction".to_owned()),
+            },
+            BacktraceItem {
+                source_range: SourceRange::new(60, 83, ModuleId::default()),
+                fn_name: None,
+            },
+        ]
     );
 }
 
@@ -1873,12 +1952,14 @@ async fn kcl_test_error_no_auth_websocket() {
 "#;
 
     let result = execute_and_snapshot_no_auth(code, None).await;
-    assert!(result.is_err());
-    assert!(result
-        .err()
-        .unwrap()
-        .to_string()
-        .contains("Please send the following object over this websocket"));
+    let err = result.unwrap_err();
+    let err = err.as_kcl_error().unwrap();
+    assert!(
+        err.message()
+            .contains("Please send the following object over this websocket"),
+        "actual: {}",
+        err.message()
+    );
 }
 
 #[tokio::test(flavor = "multi_thread")]

rust/kcl-lib/src/docs/mod.rs

@@ -995,7 +995,7 @@ mod tests {
         let snippet = pattern_fn.to_autocomplete_snippet().unwrap();
         assert_eq!(
             snippet,
-            r#"patternCircular3d(${0:%}, instances = ${1:10}, axis = [${2:3.14}, ${3:3.14}, ${4:3.14}], center = [${5:3.14}, ${6:3.14}, ${7:3.14}], arcDegrees = ${8:3.14}, rotateDuplicates = ${9:false})"#
+            r#"patternCircular3d(${0:%}, instances = ${1:10}, axis = [${2:3.14}, ${3:3.14}, ${4:3.14}], center = [${5:3.14}, ${6:3.14}, ${7:3.14}])"#
         );
     }
 

rust/kcl-lib/src/engine/conn.rs

@@ -439,12 +439,7 @@ impl EngineManager for EngineConnection {
                 request_sent: tx,
             })
             .await
-            .map_err(|e| {
-                KclError::Engine(KclErrorDetails {
-                    message: format!("Failed to send debug: {}", e),
-                    source_ranges: vec![],
-                })
-            })?;
+            .map_err(|e| KclError::Engine(KclErrorDetails::new(format!("Failed to send debug: {}", e), vec![])))?;
 
         let _ = rx.await;
         Ok(())
@@ -479,25 +474,25 @@ impl EngineManager for EngineConnection {
             })
             .await
             .map_err(|e| {
-                KclError::Engine(KclErrorDetails {
-                    message: format!("Failed to send modeling command: {}", e),
-                    source_ranges: vec![source_range],
-                })
+                KclError::Engine(KclErrorDetails::new(
+                    format!("Failed to send modeling command: {}", e),
+                    vec![source_range],
+                ))
             })?;
 
         // Wait for the request to be sent.
         rx.await
             .map_err(|e| {
-                KclError::Engine(KclErrorDetails {
-                    message: format!("could not send request to the engine actor: {e}"),
-                    source_ranges: vec![source_range],
-                })
+                KclError::Engine(KclErrorDetails::new(
+                    format!("could not send request to the engine actor: {e}"),
+                    vec![source_range],
+                ))
             })?
             .map_err(|e| {
-                KclError::Engine(KclErrorDetails {
-                    message: format!("could not send request to the engine: {e}"),
-                    source_ranges: vec![source_range],
-                })
+                KclError::Engine(KclErrorDetails::new(
+                    format!("could not send request to the engine: {e}"),
+                    vec![source_range],
+                ))
             })?;
 
         Ok(())
@@ -521,15 +516,15 @@ impl EngineManager for EngineConnection {
                 // Check if we have any pending errors.
                 let pe = self.pending_errors.read().await;
                 if !pe.is_empty() {
-                    return Err(KclError::Engine(KclErrorDetails {
-                        message: pe.join(", ").to_string(),
-                        source_ranges: vec![source_range],
-                    }));
+                    return Err(KclError::Engine(KclErrorDetails::new(
+                        pe.join(", ").to_string(),
+                        vec![source_range],
+                    )));
                 } else {
-                    return Err(KclError::Engine(KclErrorDetails {
-                        message: "Modeling command failed: websocket closed early".to_string(),
-                        source_ranges: vec![source_range],
-                    }));
+                    return Err(KclError::Engine(KclErrorDetails::new(
+                        "Modeling command failed: websocket closed early".to_string(),
+                        vec![source_range],
+                    )));
                 }
             }
 
@@ -548,10 +543,10 @@ impl EngineManager for EngineConnection {
             }
         }
 
-        Err(KclError::Engine(KclErrorDetails {
-            message: format!("Modeling command timed out `{}`", id),
-            source_ranges: vec![source_range],
-        }))
+        Err(KclError::Engine(KclErrorDetails::new(
+            format!("Modeling command timed out `{}`", id),
+            vec![source_range],
+        )))
     }
 
     async fn get_session_data(&self) -> Option<ModelingSessionData> {

rust/kcl-lib/src/engine/conn_wasm.rs

@@ -147,32 +147,27 @@ impl EngineConnection {
         id_to_source_range: HashMap<uuid::Uuid, SourceRange>,
     ) -> Result<(), KclError> {
         let source_range_str = serde_json::to_string(&source_range).map_err(|e| {
-            KclError::Engine(KclErrorDetails {
-                message: format!("Failed to serialize source range: {:?}", e),
-                source_ranges: vec![source_range],
-            })
+            KclError::Engine(KclErrorDetails::new(
+                format!("Failed to serialize source range: {:?}", e),
+                vec![source_range],
+            ))
         })?;
         let cmd_str = serde_json::to_string(&cmd).map_err(|e| {
-            KclError::Engine(KclErrorDetails {
-                message: format!("Failed to serialize modeling command: {:?}", e),
-                source_ranges: vec![source_range],
-            })
+            KclError::Engine(KclErrorDetails::new(
+                format!("Failed to serialize modeling command: {:?}", e),
+                vec![source_range],
+            ))
         })?;
         let id_to_source_range_str = serde_json::to_string(&id_to_source_range).map_err(|e| {
-            KclError::Engine(KclErrorDetails {
-                message: format!("Failed to serialize id to source range: {:?}", e),
-                source_ranges: vec![source_range],
-            })
+            KclError::Engine(KclErrorDetails::new(
+                format!("Failed to serialize id to source range: {:?}", e),
+                vec![source_range],
+            ))
         })?;
 
         self.manager
             .fire_modeling_cmd_from_wasm(id.to_string(), source_range_str, cmd_str, id_to_source_range_str)
-            .map_err(|e| {
-                KclError::Engine(KclErrorDetails {
-                    message: e.to_string().into(),
-                    source_ranges: vec![source_range],
-                })
-            })?;
+            .map_err(|e| KclError::Engine(KclErrorDetails::new(e.to_string().into(), vec![source_range])))?;
 
         Ok(())
     }
@@ -185,33 +180,28 @@ impl EngineConnection {
         id_to_source_range: HashMap<uuid::Uuid, SourceRange>,
     ) -> Result<WebSocketResponse, KclError> {
         let source_range_str = serde_json::to_string(&source_range).map_err(|e| {
-            KclError::Engine(KclErrorDetails {
-                message: format!("Failed to serialize source range: {:?}", e),
-                source_ranges: vec![source_range],
-            })
+            KclError::Engine(KclErrorDetails::new(
+                format!("Failed to serialize source range: {:?}", e),
+                vec![source_range],
+            ))
         })?;
         let cmd_str = serde_json::to_string(&cmd).map_err(|e| {
-            KclError::Engine(KclErrorDetails {
-                message: format!("Failed to serialize modeling command: {:?}", e),
-                source_ranges: vec![source_range],
-            })
+            KclError::Engine(KclErrorDetails::new(
+                format!("Failed to serialize modeling command: {:?}", e),
+                vec![source_range],
+            ))
         })?;
         let id_to_source_range_str = serde_json::to_string(&id_to_source_range).map_err(|e| {
-            KclError::Engine(KclErrorDetails {
-                message: format!("Failed to serialize id to source range: {:?}", e),
-                source_ranges: vec![source_range],
-            })
+            KclError::Engine(KclErrorDetails::new(
+                format!("Failed to serialize id to source range: {:?}", e),
+                vec![source_range],
+            ))
         })?;
 
         let promise = self
             .manager
             .send_modeling_cmd_from_wasm(id.to_string(), source_range_str, cmd_str, id_to_source_range_str)
-            .map_err(|e| {
-                KclError::Engine(KclErrorDetails {
-                    message: e.to_string().into(),
-                    source_ranges: vec![source_range],
-                })
-            })?;
+            .map_err(|e| KclError::Engine(KclErrorDetails::new(e.to_string().into(), vec![source_range])))?;
 
         let value = crate::wasm::JsFuture::from(promise).await.map_err(|e| {
             // Try to parse the error as an engine error.
@@ -219,53 +209,52 @@ impl EngineConnection {
             if let Ok(kittycad_modeling_cmds::websocket::FailureWebSocketResponse { errors, .. }) =
                 serde_json::from_str(&err_str)
             {
-                KclError::Engine(KclErrorDetails {
-                    message: errors.iter().map(|e| e.message.clone()).collect::<Vec<_>>().join("\n"),
-                    source_ranges: vec![source_range],
-                })
+                KclError::Engine(KclErrorDetails::new(
+                    errors.iter().map(|e| e.message.clone()).collect::<Vec<_>>().join("\n"),
+                    vec![source_range],
+                ))
             } else if let Ok(data) =
                 serde_json::from_str::<Vec<kittycad_modeling_cmds::websocket::FailureWebSocketResponse>>(&err_str)
             {
                 if let Some(data) = data.first() {
                     // It could also be an array of responses.
-                    KclError::Engine(KclErrorDetails {
-                        message: data
-                            .errors
+                    KclError::Engine(KclErrorDetails::new(
+                        data.errors
                             .iter()
                             .map(|e| e.message.clone())
                             .collect::<Vec<_>>()
                             .join("\n"),
-                        source_ranges: vec![source_range],
-                    })
+                        vec![source_range],
+                    ))
                 } else {
-                    KclError::Engine(KclErrorDetails {
-                        message: "Received empty response from engine".into(),
-                        source_ranges: vec![source_range],
-                    })
+                    KclError::Engine(KclErrorDetails::new(
+                        "Received empty response from engine".into(),
+                        vec![source_range],
+                    ))
                 }
             } else {
-                KclError::Engine(KclErrorDetails {
-                    message: format!("Failed to wait for promise from send modeling command: {:?}", e),
-                    source_ranges: vec![source_range],
-                })
+                KclError::Engine(KclErrorDetails::new(
+                    format!("Failed to wait for promise from send modeling command: {:?}", e),
+                    vec![source_range],
+                ))
             }
         })?;
 
         if value.is_null() || value.is_undefined() {
-            return Err(KclError::Engine(KclErrorDetails {
-                message: "Received null or undefined response from engine".into(),
-                source_ranges: vec![source_range],
-            }));
+            return Err(KclError::Engine(KclErrorDetails::new(
+                "Received null or undefined response from engine".into(),
+                vec![source_range],
+            )));
         }
 
         // Convert JsValue to a Uint8Array
         let data = js_sys::Uint8Array::from(value);
 
         let ws_result: WebSocketResponse = bson::from_slice(&data.to_vec()).map_err(|e| {
-            KclError::Engine(KclErrorDetails {
-                message: format!("Failed to deserialize bson response from engine: {:?}", e),
-                source_ranges: vec![source_range],
-            })
+            KclError::Engine(KclErrorDetails::new(
+                format!("Failed to deserialize bson response from engine: {:?}", e),
+                vec![source_range],
+            ))
         })?;
 
         Ok(ws_result)
@@ -316,18 +305,16 @@ impl crate::engine::EngineManager for EngineConnection {
         *self.default_planes.write().await = Some(new_planes);
 
         // Start a new session.
-        let promise = self.manager.start_new_session().map_err(|e| {
-            KclError::Engine(KclErrorDetails {
-                message: e.to_string().into(),
-                source_ranges: vec![source_range],
-            })
-        })?;
+        let promise = self
+            .manager
+            .start_new_session()
+            .map_err(|e| KclError::Engine(KclErrorDetails::new(e.to_string().into(), vec![source_range])))?;
 
         crate::wasm::JsFuture::from(promise).await.map_err(|e| {
-            KclError::Engine(KclErrorDetails {
-                message: format!("Failed to wait for promise from start new session: {:?}", e),
-                source_ranges: vec![source_range],
-            })
+            KclError::Engine(KclErrorDetails::new(
+                format!("Failed to wait for promise from start new session: {:?}", e),
+                vec![source_range],
+            ))
         })?;
 
         Ok(())

rust/kcl-lib/src/engine/mod.rs

@@ -276,10 +276,10 @@ pub trait EngineManager: std::fmt::Debug + Send + Sync + 'static {
                 {
                     let duration = instant::Duration::from_millis(1);
                     wasm_timer::Delay::new(duration).await.map_err(|err| {
-                        KclError::Internal(KclErrorDetails {
-                            message: format!("Failed to sleep: {:?}", err),
-                            source_ranges: vec![source_range],
-                        })
+                        KclError::Internal(KclErrorDetails::new(
+                            format!("Failed to sleep: {:?}", err),
+                            vec![source_range],
+                        ))
                     })?;
                 }
                 #[cfg(not(target_arch = "wasm32"))]
@@ -293,10 +293,10 @@ pub trait EngineManager: std::fmt::Debug + Send + Sync + 'static {
             return Ok(response);
         }
 
-        Err(KclError::Engine(KclErrorDetails {
-            message: "async command timed out".to_string(),
-            source_ranges: vec![source_range],
-        }))
+        Err(KclError::Engine(KclErrorDetails::new(
+            "async command timed out".to_string(),
+            vec![source_range],
+        )))
     }
 
     /// Ensure ALL async commands have been completed.
@@ -547,10 +547,10 @@ pub trait EngineManager: std::fmt::Debug + Send + Sync + 'static {
                     id_to_source_range.insert(Uuid::from(*cmd_id), *range);
                 }
                 _ => {
-                    return Err(KclError::Engine(KclErrorDetails {
-                        message: format!("The request is not a modeling command: {:?}", req),
-                        source_ranges: vec![*range],
-                    }));
+                    return Err(KclError::Engine(KclErrorDetails::new(
+                        format!("The request is not a modeling command: {:?}", req),
+                        vec![*range],
+                    )));
                 }
             }
         }
@@ -595,10 +595,10 @@ pub trait EngineManager: std::fmt::Debug + Send + Sync + 'static {
                     self.parse_batch_responses(last_id.into(), id_to_source_range, responses)
                 } else {
                     // We should never get here.
-                    Err(KclError::Engine(KclErrorDetails {
-                        message: format!("Failed to get batch response: {:?}", response),
-                        source_ranges: vec![source_range],
-                    }))
+                    Err(KclError::Engine(KclErrorDetails::new(
+                        format!("Failed to get batch response: {:?}", response),
+                        vec![source_range],
+                    )))
                 }
             }
             WebSocketRequest::ModelingCmdReq(ModelingCmdReq { cmd: _, cmd_id }) => {
@@ -610,20 +610,20 @@ pub trait EngineManager: std::fmt::Debug + Send + Sync + 'static {
                 // request so we need the original request source range in case the engine returns
                 // an error.
                 let source_range = id_to_source_range.get(cmd_id.as_ref()).cloned().ok_or_else(|| {
-                    KclError::Engine(KclErrorDetails {
-                        message: format!("Failed to get source range for command ID: {:?}", cmd_id),
-                        source_ranges: vec![],
-                    })
+                    KclError::Engine(KclErrorDetails::new(
+                        format!("Failed to get source range for command ID: {:?}", cmd_id),
+                        vec![],
+                    ))
                 })?;
                 let ws_resp = self
                     .inner_send_modeling_cmd(cmd_id.into(), source_range, final_req, id_to_source_range)
                     .await?;
                 self.parse_websocket_response(ws_resp, source_range)
             }
-            _ => Err(KclError::Engine(KclErrorDetails {
-                message: format!("The final request is not a modeling command: {:?}", final_req),
-                source_ranges: vec![source_range],
-            })),
+            _ => Err(KclError::Engine(KclErrorDetails::new(
+                format!("The final request is not a modeling command: {:?}", final_req),
+                vec![source_range],
+            ))),
         }
     }
 
@@ -729,10 +729,10 @@ pub trait EngineManager: std::fmt::Debug + Send + Sync + 'static {
         for (name, plane_id, color) in plane_settings {
             let info = DEFAULT_PLANE_INFO.get(&name).ok_or_else(|| {
                 // We should never get here.
-                KclError::Engine(KclErrorDetails {
-                    message: format!("Failed to get default plane info for: {:?}", name),
-                    source_ranges: vec![source_range],
-                })
+                KclError::Engine(KclErrorDetails::new(
+                    format!("Failed to get default plane info for: {:?}", name),
+                    vec![source_range],
+                ))
             })?;
             planes.insert(
                 name,
@@ -763,15 +763,14 @@ pub trait EngineManager: std::fmt::Debug + Send + Sync + 'static {
             WebSocketResponse::Success(success) => Ok(success.resp),
             WebSocketResponse::Failure(fail) => {
                 let _request_id = fail.request_id;
-                Err(KclError::Engine(KclErrorDetails {
-                    message: fail
-                        .errors
+                Err(KclError::Engine(KclErrorDetails::new(
+                    fail.errors
                         .iter()
                         .map(|e| e.message.clone())
                         .collect::<Vec<_>>()
                         .join("\n"),
-                    source_ranges: vec![source_range],
-                }))
+                    vec![source_range],
+                )))
             }
         }
     }
@@ -806,25 +805,25 @@ pub trait EngineManager: std::fmt::Debug + Send + Sync + 'static {
                 BatchResponse::Failure { errors } => {
                     // Get the source range for the command.
                     let source_range = id_to_source_range.get(cmd_id).cloned().ok_or_else(|| {
-                        KclError::Engine(KclErrorDetails {
-                            message: format!("Failed to get source range for command ID: {:?}", cmd_id),
-                            source_ranges: vec![],
-                        })
+                        KclError::Engine(KclErrorDetails::new(
+                            format!("Failed to get source range for command ID: {:?}", cmd_id),
+                            vec![],
+                        ))
                     })?;
-                    return Err(KclError::Engine(KclErrorDetails {
-                        message: errors.iter().map(|e| e.message.clone()).collect::<Vec<_>>().join("\n"),
-                        source_ranges: vec![source_range],
-                    }));
+                    return Err(KclError::Engine(KclErrorDetails::new(
+                        errors.iter().map(|e| e.message.clone()).collect::<Vec<_>>().join("\n"),
+                        vec![source_range],
+                    )));
                 }
             }
         }
 
         // Return an error that we did not get an error or the response we wanted.
         // This should never happen but who knows.
-        Err(KclError::Engine(KclErrorDetails {
-            message: format!("Failed to find response for command ID: {:?}", id),
-            source_ranges: vec![],
-        }))
+        Err(KclError::Engine(KclErrorDetails::new(
+            format!("Failed to find response for command ID: {:?}", id),
+            vec![],
+        )))
     }
 
     async fn modify_grid(

rust/kcl-lib/src/errors.rs

@@ -380,20 +380,39 @@ impl miette::Diagnostic for Report {
 }
 
 #[derive(Debug, Serialize, Deserialize, ts_rs::TS, Clone, PartialEq, Eq, thiserror::Error, miette::Diagnostic)]
+#[serde(rename_all = "camelCase")]
 #[error("{message}")]
 #[ts(export)]
 pub struct KclErrorDetails {
-    #[serde(rename = "sourceRanges")]
     #[label(collection, "Errors")]
     pub source_ranges: Vec<SourceRange>,
+    pub backtrace: Vec<BacktraceItem>,
     #[serde(rename = "msg")]
     pub message: String,
 }
 
+impl KclErrorDetails {
+    pub fn new(message: String, source_ranges: Vec<SourceRange>) -> KclErrorDetails {
+        let backtrace = source_ranges
+            .iter()
+            .map(|s| BacktraceItem {
+                source_range: *s,
+                fn_name: None,
+            })
+            .collect();
+        KclErrorDetails {
+            source_ranges,
+            backtrace,
+            message,
+        }
+    }
+}
+
 impl KclError {
     pub fn internal(message: String) -> KclError {
         KclError::Internal(KclErrorDetails {
             source_ranges: Default::default(),
+            backtrace: Default::default(),
             message,
         })
     }
@@ -455,45 +474,122 @@ impl KclError {
         }
     }
 
+    pub fn backtrace(&self) -> Vec<BacktraceItem> {
+        match self {
+            KclError::Lexical(e)
+            | KclError::Syntax(e)
+            | KclError::Semantic(e)
+            | KclError::ImportCycle(e)
+            | KclError::Type(e)
+            | KclError::Io(e)
+            | KclError::Unexpected(e)
+            | KclError::ValueAlreadyDefined(e)
+            | KclError::UndefinedValue(e)
+            | KclError::InvalidExpression(e)
+            | KclError::Engine(e)
+            | KclError::Internal(e) => e.backtrace.clone(),
+        }
+    }
+
     pub(crate) fn override_source_ranges(&self, source_ranges: Vec<SourceRange>) -> Self {
         let mut new = self.clone();
         match &mut new {
-            KclError::Lexical(e) => e.source_ranges = source_ranges,
-            KclError::Syntax(e) => e.source_ranges = source_ranges,
-            KclError::Semantic(e) => e.source_ranges = source_ranges,
-            KclError::ImportCycle(e) => e.source_ranges = source_ranges,
-            KclError::Type(e) => e.source_ranges = source_ranges,
-            KclError::Io(e) => e.source_ranges = source_ranges,
-            KclError::Unexpected(e) => e.source_ranges = source_ranges,
-            KclError::ValueAlreadyDefined(e) => e.source_ranges = source_ranges,
-            KclError::UndefinedValue(e) => e.source_ranges = source_ranges,
-            KclError::InvalidExpression(e) => e.source_ranges = source_ranges,
-            KclError::Engine(e) => e.source_ranges = source_ranges,
-            KclError::Internal(e) => e.source_ranges = source_ranges,
+            KclError::Lexical(e)
+            | KclError::Syntax(e)
+            | KclError::Semantic(e)
+            | KclError::ImportCycle(e)
+            | KclError::Type(e)
+            | KclError::Io(e)
+            | KclError::Unexpected(e)
+            | KclError::ValueAlreadyDefined(e)
+            | KclError::UndefinedValue(e)
+            | KclError::InvalidExpression(e)
+            | KclError::Engine(e)
+            | KclError::Internal(e) => {
+                e.backtrace = source_ranges
+                    .iter()
+                    .map(|s| BacktraceItem {
+                        source_range: *s,
+                        fn_name: None,
+                    })
+                    .collect();
+                e.source_ranges = source_ranges;
+            }
         }
 
         new
     }
 
-    pub(crate) fn add_source_ranges(&self, source_ranges: Vec<SourceRange>) -> Self {
+    pub(crate) fn set_last_backtrace_fn_name(&self, last_fn_name: Option<String>) -> Self {
         let mut new = self.clone();
         match &mut new {
-            KclError::Lexical(e) => e.source_ranges.extend(source_ranges),
-            KclError::Syntax(e) => e.source_ranges.extend(source_ranges),
-            KclError::Semantic(e) => e.source_ranges.extend(source_ranges),
-            KclError::ImportCycle(e) => e.source_ranges.extend(source_ranges),
-            KclError::Type(e) => e.source_ranges.extend(source_ranges),
-            KclError::Io(e) => e.source_ranges.extend(source_ranges),
-            KclError::Unexpected(e) => e.source_ranges.extend(source_ranges),
-            KclError::ValueAlreadyDefined(e) => e.source_ranges.extend(source_ranges),
-            KclError::UndefinedValue(e) => e.source_ranges.extend(source_ranges),
-            KclError::InvalidExpression(e) => e.source_ranges.extend(source_ranges),
-            KclError::Engine(e) => e.source_ranges.extend(source_ranges),
-            KclError::Internal(e) => e.source_ranges.extend(source_ranges),
+            KclError::Lexical(e)
+            | KclError::Syntax(e)
+            | KclError::Semantic(e)
+            | KclError::ImportCycle(e)
+            | KclError::Type(e)
+            | KclError::Io(e)
+            | KclError::Unexpected(e)
+            | KclError::ValueAlreadyDefined(e)
+            | KclError::UndefinedValue(e)
+            | KclError::InvalidExpression(e)
+            | KclError::Engine(e)
+            | KclError::Internal(e) => {
+                if let Some(item) = e.backtrace.last_mut() {
+                    item.fn_name = last_fn_name;
+                }
+            }
         }
 
         new
     }
+
+    pub(crate) fn add_unwind_location(&self, last_fn_name: Option<String>, source_range: SourceRange) -> Self {
+        let mut new = self.clone();
+        match &mut new {
+            KclError::Lexical(e)
+            | KclError::Syntax(e)
+            | KclError::Semantic(e)
+            | KclError::ImportCycle(e)
+            | KclError::Type(e)
+            | KclError::Io(e)
+            | KclError::Unexpected(e)
+            | KclError::ValueAlreadyDefined(e)
+            | KclError::UndefinedValue(e)
+            | KclError::InvalidExpression(e)
+            | KclError::Engine(e)
+            | KclError::Internal(e) => {
+                if let Some(item) = e.backtrace.last_mut() {
+                    item.fn_name = last_fn_name;
+                }
+                e.backtrace.push(BacktraceItem {
+                    source_range,
+                    fn_name: None,
+                });
+                e.source_ranges.push(source_range);
+            }
+        }
+
+        new
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, ts_rs::TS, thiserror::Error, miette::Diagnostic)]
+#[serde(rename_all = "camelCase")]
+#[ts(export)]
+pub struct BacktraceItem {
+    pub source_range: SourceRange,
+    pub fn_name: Option<String>,
+}
+
+impl std::fmt::Display for BacktraceItem {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        if let Some(fn_name) = &self.fn_name {
+            write!(f, "{fn_name}: {:?}", self.source_range)
+        } else {
+            write!(f, "(fn): {:?}", self.source_range)
+        }
+    }
 }
 
 impl IntoDiagnostic for KclError {
@@ -551,6 +647,7 @@ impl From<pyo3::PyErr> for KclError {
     fn from(error: pyo3::PyErr) -> Self {
         KclError::Internal(KclErrorDetails {
             source_ranges: vec![],
+            backtrace: Default::default(),
             message: error.to_string(),
         })
     }
@@ -629,8 +726,13 @@ impl CompilationError {
 
 impl From<CompilationError> for KclErrorDetails {
     fn from(err: CompilationError) -> Self {
+        let backtrace = vec![BacktraceItem {
+            source_range: err.source_range,
+            fn_name: None,
+        }];
         KclErrorDetails {
             source_ranges: vec![err.source_range],
+            backtrace,
             message: err.message,
         }
     }

rust/kcl-lib/src/execution/annotations.rs

@@ -70,10 +70,10 @@ pub(super) fn expect_properties<'a>(
 ) -> Result<&'a [Node<ObjectProperty>], KclError> {
     assert_eq!(annotation.name().unwrap(), for_key);
     Ok(&**annotation.properties.as_ref().ok_or_else(|| {
-        KclError::Semantic(KclErrorDetails {
-            message: format!("Empty `{for_key}` annotation"),
-            source_ranges: vec![annotation.as_source_range()],
-        })
+        KclError::Semantic(KclErrorDetails::new(
+            format!("Empty `{for_key}` annotation"),
+            vec![annotation.as_source_range()],
+        ))
     })?)
 }
 
@@ -84,10 +84,10 @@ pub(super) fn expect_ident(expr: &Expr) -> Result<&str, KclError> {
         }
     }
 
-    Err(KclError::Semantic(KclErrorDetails {
-        message: "Unexpected settings value, expected a simple name, e.g., `mm`".to_owned(),
-        source_ranges: vec![expr.into()],
-    }))
+    Err(KclError::Semantic(KclErrorDetails::new(
+        "Unexpected settings value, expected a simple name, e.g., `mm`".to_owned(),
+        vec![expr.into()],
+    )))
 }
 
 // Returns the unparsed number literal.
@@ -98,10 +98,10 @@ pub(super) fn expect_number(expr: &Expr) -> Result<String, KclError> {
         }
     }
 
-    Err(KclError::Semantic(KclErrorDetails {
-        message: "Unexpected settings value, expected a number, e.g., `1.0`".to_owned(),
-        source_ranges: vec![expr.into()],
-    }))
+    Err(KclError::Semantic(KclErrorDetails::new(
+        "Unexpected settings value, expected a number, e.g., `1.0`".to_owned(),
+        vec![expr.into()],
+    )))
 }
 
 pub(super) fn get_impl(annotations: &[Node<Annotation>], source_range: SourceRange) -> Result<Option<Impl>, KclError> {
@@ -113,14 +113,14 @@ pub(super) fn get_impl(annotations: &[Node<Annotation>], source_range: SourceRan
             if &*p.key.name == IMPL {
                 if let Some(s) = p.value.ident_name() {
                     return Impl::from_str(s).map(Some).map_err(|_| {
-                        KclError::Semantic(KclErrorDetails {
-                            message: format!(
+                        KclError::Semantic(KclErrorDetails::new(
+                            format!(
                                 "Invalid value for {} attribute, expected one of: {}",
                                 IMPL,
                                 IMPL_VALUES.join(", ")
                             ),
-                            source_ranges: vec![source_range],
-                        })
+                            vec![source_range],
+                        ))
                     });
                 }
             }
@@ -139,12 +139,12 @@ impl UnitLen {
             "inch" | "in" => Ok(UnitLen::Inches),
             "ft" => Ok(UnitLen::Feet),
             "yd" => Ok(UnitLen::Yards),
-            value => Err(KclError::Semantic(KclErrorDetails {
-                message: format!(
+            value => Err(KclError::Semantic(KclErrorDetails::new(
+                format!(
                     "Unexpected value for length units: `{value}`; expected one of `mm`, `cm`, `m`, `in`, `ft`, `yd`"
                 ),
-                source_ranges: vec![source_range],
-            })),
+                vec![source_range],
+            ))),
         }
     }
 }
@@ -154,10 +154,10 @@ impl UnitAngle {
         match s {
             "deg" => Ok(UnitAngle::Degrees),
             "rad" => Ok(UnitAngle::Radians),
-            value => Err(KclError::Semantic(KclErrorDetails {
-                message: format!("Unexpected value for angle units: `{value}`; expected one of `deg`, `rad`"),
-                source_ranges: vec![source_range],
-            })),
+            value => Err(KclError::Semantic(KclErrorDetails::new(
+                format!("Unexpected value for angle units: `{value}`; expected one of `deg`, `rad`"),
+                vec![source_range],
+            ))),
         }
     }
 }

rust/kcl-lib/src/execution/artifact.rs

@@ -2,18 +2,17 @@ use fnv::FnvHashMap;
 use indexmap::IndexMap;
 use kittycad_modeling_cmds::{
     self as kcmc,
-    id::ModelingCmdId,
     ok_response::OkModelingCmdResponse,
     shared::ExtrusionFaceCapType,
     websocket::{BatchResponse, OkWebSocketResponseData, WebSocketResponse},
     EnableSketchMode, ModelingCmd,
 };
-use schemars::JsonSchema;
 use serde::{ser::SerializeSeq, Serialize};
 use uuid::Uuid;
 
 use crate::{
     errors::KclErrorDetails,
+    execution::ArtifactId,
     parsing::ast::types::{Node, Program},
     KclError, NodePath, SourceRange,
 };
@@ -58,52 +57,6 @@ impl PartialOrd for ArtifactCommand {
     }
 }
 
-#[derive(Debug, Clone, Copy, Serialize, PartialEq, Eq, Ord, PartialOrd, Hash, ts_rs::TS, JsonSchema)]
-#[ts(export_to = "Artifact.ts")]
-pub struct ArtifactId(Uuid);
-
-impl ArtifactId {
-    pub fn new(uuid: Uuid) -> Self {
-        Self(uuid)
-    }
-}
-
-impl From<Uuid> for ArtifactId {
-    fn from(uuid: Uuid) -> Self {
-        Self::new(uuid)
-    }
-}
-
-impl From<&Uuid> for ArtifactId {
-    fn from(uuid: &Uuid) -> Self {
-        Self::new(*uuid)
-    }
-}
-
-impl From<ArtifactId> for Uuid {
-    fn from(id: ArtifactId) -> Self {
-        id.0
-    }
-}
-
-impl From<&ArtifactId> for Uuid {
-    fn from(id: &ArtifactId) -> Self {
-        id.0
-    }
-}
-
-impl From<ModelingCmdId> for ArtifactId {
-    fn from(id: ModelingCmdId) -> Self {
-        Self::new(*id.as_ref())
-    }
-}
-
-impl From<&ModelingCmdId> for ArtifactId {
-    fn from(id: &ModelingCmdId) -> Self {
-        Self::new(*id.as_ref())
-    }
-}
-
 pub type DummyPathToNode = Vec<()>;
 
 fn serialize_dummy_path_to_node<S>(_path_to_node: &DummyPathToNode, serializer: S) -> Result<S::Ok, S::Error>
@@ -988,12 +941,10 @@ fn artifacts_to_update(
         ModelingCmd::StartPath(_) => {
             let mut return_arr = Vec::new();
             let current_plane_id = path_to_plane_id_map.get(&artifact_command.cmd_id).ok_or_else(|| {
-                KclError::Internal(KclErrorDetails {
-                    message: format!(
-                        "Expected a current plane ID when processing StartPath command, but we have none: {id:?}"
-                    ),
-                    source_ranges: vec![range],
-                })
+                KclError::Internal(KclErrorDetails::new(
+                    format!("Expected a current plane ID when processing StartPath command, but we have none: {id:?}"),
+                    vec![range],
+                ))
             })?;
             return_arr.push(Artifact::Path(Path {
                 id,
@@ -1112,10 +1063,10 @@ fn artifacts_to_update(
                 // TODO: Using the first one.  Make sure to revisit this
                 // choice, don't think it matters for now.
                 path_id: ArtifactId::new(*loft_cmd.section_ids.first().ok_or_else(|| {
-                    KclError::Internal(KclErrorDetails {
-                        message: format!("Expected at least one section ID in Loft command: {id:?}; cmd={cmd:?}"),
-                        source_ranges: vec![range],
-                    })
+                    KclError::Internal(KclErrorDetails::new(
+                        format!("Expected at least one section ID in Loft command: {id:?}; cmd={cmd:?}"),
+                        vec![range],
+                    ))
                 })?),
                 surface_ids: Vec::new(),
                 edge_ids: Vec::new(),
@@ -1155,12 +1106,12 @@ fn artifacts_to_update(
                 };
                 last_path = Some(path);
                 let path_sweep_id = path.sweep_id.ok_or_else(|| {
-                    KclError::Internal(KclErrorDetails {
-                        message:format!(
+                    KclError::Internal(KclErrorDetails::new(
+                        format!(
                             "Expected a sweep ID on the path when processing Solid3dGetExtrusionFaceInfo command, but we have none: {id:?}, {path:?}"
                         ),
-                        source_ranges: vec![range],
-                    })
+                        vec![range],
+                    ))
                 })?;
                 let extra_artifact = exec_artifacts.values().find(|a| {
                     if let Artifact::StartSketchOnFace(s) = a {
@@ -1209,12 +1160,12 @@ fn artifacts_to_update(
                         continue;
                     };
                     let path_sweep_id = path.sweep_id.ok_or_else(|| {
-                        KclError::Internal(KclErrorDetails {
-                            message:format!(
+                        KclError::Internal(KclErrorDetails::new(
+                            format!(
                                 "Expected a sweep ID on the path when processing last path's Solid3dGetExtrusionFaceInfo command, but we have none: {id:?}, {path:?}"
                             ),
-                            source_ranges: vec![range],
-                        })
+                            vec![range],
+                        ))
                     })?;
                     let extra_artifact = exec_artifacts.values().find(|a| {
                         if let Artifact::StartSketchOnFace(s) = a {

rust/kcl-lib/src/execution/artifact/mermaid_tests.rs

@@ -308,6 +308,11 @@ impl ArtifactGraph {
             // a child of the line above it.
             let label = label.unwrap_or("");
             if code_ref.node_path.is_empty() {
+                if !code_ref.range.module_id().is_top_level() {
+                    // This is pointing to another module. We don't care about
+                    // these. It's okay that it's missing, for now.
+                    return Ok(());
+                }
                 return writeln!(output, "{prefix}  %% {label}Missing NodePath");
             }
             writeln!(output, "{prefix}  %% {label}{:?}", code_ref.node_path.steps)

rust/kcl-lib/src/execution/cad_op.rs

@@ -3,7 +3,7 @@ use schemars::JsonSchema;
 use serde::Serialize;
 
 use super::{types::NumericType, ArtifactId, KclValue};
-use crate::{docs::StdLibFn, ModuleId, SourceRange};
+use crate::{ModuleId, SourceRange};
 
 /// A CAD modeling operation for display in the feature tree, AKA operations
 /// timeline.
@@ -13,21 +13,6 @@ use crate::{docs::StdLibFn, ModuleId, SourceRange};
 pub enum Operation {
     #[serde(rename_all = "camelCase")]
     StdLibCall {
-        /// The standard library function being called.
-        #[serde(flatten)]
-        std_lib_fn: StdLibFnRef,
-        /// The unlabeled argument to the function.
-        unlabeled_arg: Option<OpArg>,
-        /// The labeled keyword arguments to the function.
-        labeled_args: IndexMap<String, OpArg>,
-        /// The source range of the operation in the source code.
-        source_range: SourceRange,
-        /// True if the operation resulted in an error.
-        #[serde(default, skip_serializing_if = "is_false")]
-        is_error: bool,
-    },
-    #[serde(rename_all = "camelCase")]
-    KclStdLibCall {
         name: String,
         /// The unlabeled argument to the function.
         unlabeled_arg: Option<OpArg>,
@@ -57,19 +42,12 @@ impl PartialOrd for Operation {
     fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
         Some(match (self, other) {
             (Self::StdLibCall { source_range: a, .. }, Self::StdLibCall { source_range: b, .. }) => a.cmp(b),
-            (Self::StdLibCall { source_range: a, .. }, Self::KclStdLibCall { source_range: b, .. }) => a.cmp(b),
             (Self::StdLibCall { source_range: a, .. }, Self::GroupBegin { source_range: b, .. }) => a.cmp(b),
             (Self::StdLibCall { .. }, Self::GroupEnd) => std::cmp::Ordering::Less,
-            (Self::KclStdLibCall { source_range: a, .. }, Self::KclStdLibCall { source_range: b, .. }) => a.cmp(b),
-            (Self::KclStdLibCall { source_range: a, .. }, Self::StdLibCall { source_range: b, .. }) => a.cmp(b),
-            (Self::KclStdLibCall { source_range: a, .. }, Self::GroupBegin { source_range: b, .. }) => a.cmp(b),
-            (Self::KclStdLibCall { .. }, Self::GroupEnd) => std::cmp::Ordering::Less,
             (Self::GroupBegin { source_range: a, .. }, Self::GroupBegin { source_range: b, .. }) => a.cmp(b),
             (Self::GroupBegin { source_range: a, .. }, Self::StdLibCall { source_range: b, .. }) => a.cmp(b),
-            (Self::GroupBegin { source_range: a, .. }, Self::KclStdLibCall { source_range: b, .. }) => a.cmp(b),
             (Self::GroupBegin { .. }, Self::GroupEnd) => std::cmp::Ordering::Less,
             (Self::GroupEnd, Self::StdLibCall { .. }) => std::cmp::Ordering::Greater,
-            (Self::GroupEnd, Self::KclStdLibCall { .. }) => std::cmp::Ordering::Greater,
             (Self::GroupEnd, Self::GroupBegin { .. }) => std::cmp::Ordering::Greater,
             (Self::GroupEnd, Self::GroupEnd) => std::cmp::Ordering::Equal,
         })
@@ -81,7 +59,6 @@ impl Operation {
     pub(crate) fn set_std_lib_call_is_error(&mut self, is_err: bool) {
         match self {
             Self::StdLibCall { ref mut is_error, .. } => *is_error = is_err,
-            Self::KclStdLibCall { ref mut is_error, .. } => *is_error = is_err,
             Self::GroupBegin { .. } | Self::GroupEnd => {}
         }
     }
@@ -107,6 +84,7 @@ pub enum Group {
         labeled_args: IndexMap<String, OpArg>,
     },
     /// A whole-module import use.
+    #[allow(dead_code)]
     #[serde(rename_all = "camelCase")]
     ModuleInstance {
         /// The name of the module being used.
@@ -135,54 +113,6 @@ impl OpArg {
     }
 }
 
-/// A reference to a standard library function.  This exists to implement
-/// `PartialEq` and `Eq` for `Operation`.
-#[derive(Debug, Clone, Serialize, ts_rs::TS, JsonSchema)]
-#[ts(export_to = "Operation.ts")]
-#[serde(rename_all = "camelCase")]
-pub struct StdLibFnRef {
-    // The following doc comment gets inlined into Operation, overriding what's
-    // there, in the generated TS.  We serialize to its name.  Renaming the
-    // field to "name" allows it to match the other variant.
-    /// The standard library function being called.
-    #[serde(
-        rename = "name",
-        serialize_with = "std_lib_fn_name",
-        deserialize_with = "std_lib_fn_from_name"
-    )]
-    #[ts(type = "string", rename = "name")]
-    pub std_lib_fn: Box<dyn StdLibFn>,
-}
-
-impl StdLibFnRef {
-    pub(crate) fn new(std_lib_fn: Box<dyn StdLibFn>) -> Self {
-        Self { std_lib_fn }
-    }
-}
-
-impl From<&Box<dyn StdLibFn>> for StdLibFnRef {
-    fn from(std_lib_fn: &Box<dyn StdLibFn>) -> Self {
-        Self::new(std_lib_fn.clone())
-    }
-}
-
-impl PartialEq for StdLibFnRef {
-    fn eq(&self, other: &Self) -> bool {
-        self.std_lib_fn.name() == other.std_lib_fn.name()
-    }
-}
-
-impl Eq for StdLibFnRef {}
-
-#[expect(clippy::borrowed_box, reason = "Explicit Box is needed for serde")]
-fn std_lib_fn_name<S>(std_lib_fn: &Box<dyn StdLibFn>, serializer: S) -> Result<S::Ok, S::Error>
-where
-    S: serde::Serializer,
-{
-    let name = std_lib_fn.name();
-    serializer.serialize_str(&name)
-}
-
 fn is_false(b: &bool) -> bool {
     !*b
 }

rust/kcl-lib/src/execution/fn_call.rs

@@ -0,0 +1,988 @@
+use async_recursion::async_recursion;
+use indexmap::IndexMap;
+
+use super::{types::ArrayLen, EnvironmentRef};
+use crate::{
+    docs::StdLibFn,
+    errors::{KclError, KclErrorDetails},
+    execution::{
+        cad_op::{Group, OpArg, OpKclValue, Operation},
+        kcl_value::FunctionSource,
+        memory,
+        types::RuntimeType,
+        BodyType, ExecState, ExecutorContext, KclValue, Metadata, StatementKind, TagEngineInfo, TagIdentifier,
+    },
+    parsing::ast::types::{CallExpressionKw, DefaultParamVal, FunctionExpression, Node, Program, Type},
+    source_range::SourceRange,
+    std::StdFn,
+    CompilationError,
+};
+
+#[derive(Debug, Clone)]
+pub struct Args {
+    /// Positional args.
+    pub args: Vec<Arg>,
+    /// Keyword arguments
+    pub kw_args: KwArgs,
+    pub source_range: SourceRange,
+    pub ctx: ExecutorContext,
+    /// If this call happens inside a pipe (|>) expression, this holds the LHS of that |>.
+    /// Otherwise it's None.
+    pub pipe_value: Option<Arg>,
+}
+
+impl Args {
+    pub fn new(args: Vec<Arg>, source_range: SourceRange, ctx: ExecutorContext, pipe_value: Option<Arg>) -> Self {
+        Self {
+            args,
+            kw_args: Default::default(),
+            source_range,
+            ctx,
+            pipe_value,
+        }
+    }
+
+    /// Collect the given keyword arguments.
+    pub fn new_kw(kw_args: KwArgs, source_range: SourceRange, ctx: ExecutorContext, pipe_value: Option<Arg>) -> Self {
+        Self {
+            args: Default::default(),
+            kw_args,
+            source_range,
+            ctx,
+            pipe_value,
+        }
+    }
+
+    /// Get the unlabeled keyword argument. If not set, returns None.
+    pub(crate) fn unlabeled_kw_arg_unconverted(&self) -> Option<&Arg> {
+        self.kw_args
+            .unlabeled
+            .as_ref()
+            .map(|(_, a)| a)
+            .or(self.args.first())
+            .or(self.pipe_value.as_ref())
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct Arg {
+    /// The evaluated argument.
+    pub value: KclValue,
+    /// The source range of the unevaluated argument.
+    pub source_range: SourceRange,
+}
+
+impl Arg {
+    pub fn new(value: KclValue, source_range: SourceRange) -> Self {
+        Self { value, source_range }
+    }
+
+    pub fn synthetic(value: KclValue) -> Self {
+        Self {
+            value,
+            source_range: SourceRange::synthetic(),
+        }
+    }
+
+    pub fn source_ranges(&self) -> Vec<SourceRange> {
+        vec![self.source_range]
+    }
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct KwArgs {
+    /// Unlabeled keyword args. Currently only the first arg can be unlabeled.
+    /// If the argument was a local variable, then the first element of the tuple is its name
+    /// which may be used to treat this arg as a labelled arg.
+    pub unlabeled: Option<(Option<String>, Arg)>,
+    /// Labeled args.
+    pub labeled: IndexMap<String, Arg>,
+    pub errors: Vec<Arg>,
+}
+
+impl KwArgs {
+    /// How many arguments are there?
+    pub fn len(&self) -> usize {
+        self.labeled.len() + if self.unlabeled.is_some() { 1 } else { 0 }
+    }
+    /// Are there no arguments?
+    pub fn is_empty(&self) -> bool {
+        self.labeled.len() == 0 && self.unlabeled.is_none()
+    }
+}
+
+struct FunctionDefinition<'a> {
+    input_arg: Option<(String, Option<Type>)>,
+    named_args: IndexMap<String, (Option<DefaultParamVal>, Option<Type>)>,
+    return_type: Option<Node<Type>>,
+    deprecated: bool,
+    include_in_feature_tree: bool,
+    is_std: bool,
+    body: FunctionBody<'a>,
+}
+
+#[derive(Debug)]
+enum FunctionBody<'a> {
+    Rust(StdFn),
+    Kcl(&'a Node<Program>, EnvironmentRef),
+}
+
+impl<'a> From<&'a FunctionSource> for FunctionDefinition<'a> {
+    fn from(value: &'a FunctionSource) -> Self {
+        #[allow(clippy::type_complexity)]
+        fn args_from_ast(
+            ast: &FunctionExpression,
+        ) -> (
+            Option<(String, Option<Type>)>,
+            IndexMap<String, (Option<DefaultParamVal>, Option<Type>)>,
+        ) {
+            let mut input_arg = None;
+            let mut named_args = IndexMap::new();
+            for p in &ast.params {
+                if !p.labeled {
+                    input_arg = Some((p.identifier.name.clone(), p.type_.as_ref().map(|t| t.inner.clone())));
+                    continue;
+                }
+
+                named_args.insert(
+                    p.identifier.name.clone(),
+                    (p.default_value.clone(), p.type_.as_ref().map(|t| t.inner.clone())),
+                );
+            }
+
+            (input_arg, named_args)
+        }
+
+        match value {
+            FunctionSource::Std { func, ast, props } => {
+                let (input_arg, named_args) = args_from_ast(ast);
+                FunctionDefinition {
+                    input_arg,
+                    named_args,
+                    return_type: ast.return_type.clone(),
+                    deprecated: props.deprecated,
+                    include_in_feature_tree: props.include_in_feature_tree,
+                    is_std: true,
+                    body: FunctionBody::Rust(*func),
+                }
+            }
+            FunctionSource::User { ast, memory, .. } => {
+                let (input_arg, named_args) = args_from_ast(ast);
+                FunctionDefinition {
+                    input_arg,
+                    named_args,
+                    return_type: ast.return_type.clone(),
+                    deprecated: false,
+                    include_in_feature_tree: true,
+                    // TODO I think this might be wrong for pure Rust std functions
+                    is_std: false,
+                    body: FunctionBody::Kcl(&ast.body, *memory),
+                }
+            }
+            FunctionSource::None => unreachable!(),
+        }
+    }
+}
+
+impl From<&dyn StdLibFn> for FunctionDefinition<'static> {
+    fn from(value: &dyn StdLibFn) -> Self {
+        let mut input_arg = None;
+        let mut named_args = IndexMap::new();
+        for a in value.args(false) {
+            if !a.label_required {
+                input_arg = Some((a.name.clone(), None));
+                continue;
+            }
+
+            named_args.insert(
+                a.name.clone(),
+                (
+                    if a.required {
+                        None
+                    } else {
+                        Some(DefaultParamVal::none())
+                    },
+                    None,
+                ),
+            );
+        }
+        FunctionDefinition {
+            input_arg,
+            named_args,
+            return_type: None,
+            deprecated: value.deprecated(),
+            include_in_feature_tree: value.feature_tree_operation(),
+            is_std: true,
+            body: FunctionBody::Rust(value.std_lib_fn()),
+        }
+    }
+}
+
+impl Node<CallExpressionKw> {
+    #[async_recursion]
+    pub async fn execute(&self, exec_state: &mut ExecState, ctx: &ExecutorContext) -> Result<KclValue, KclError> {
+        let fn_name = &self.callee;
+        let callsite: SourceRange = self.into();
+
+        // Build a hashmap from argument labels to the final evaluated values.
+        let mut fn_args = IndexMap::with_capacity(self.arguments.len());
+        let mut errors = Vec::new();
+        for arg_expr in &self.arguments {
+            let source_range = SourceRange::from(arg_expr.arg.clone());
+            let metadata = Metadata { source_range };
+            let value = ctx
+                .execute_expr(&arg_expr.arg, exec_state, &metadata, &[], StatementKind::Expression)
+                .await?;
+            let arg = Arg::new(value, source_range);
+            match &arg_expr.label {
+                Some(l) => {
+                    fn_args.insert(l.name.clone(), arg);
+                }
+                None => {
+                    if let Some(id) = arg_expr.arg.ident_name() {
+                        fn_args.insert(id.to_owned(), arg);
+                    } else {
+                        errors.push(arg);
+                    }
+                }
+            }
+        }
+
+        // Evaluate the unlabeled first param, if any exists.
+        let unlabeled = if let Some(ref arg_expr) = self.unlabeled {
+            let source_range = SourceRange::from(arg_expr.clone());
+            let metadata = Metadata { source_range };
+            let value = ctx
+                .execute_expr(arg_expr, exec_state, &metadata, &[], StatementKind::Expression)
+                .await?;
+
+            let label = arg_expr.ident_name().map(str::to_owned);
+
+            Some((label, Arg::new(value, source_range)))
+        } else {
+            None
+        };
+
+        let args = Args::new_kw(
+            KwArgs {
+                unlabeled,
+                labeled: fn_args,
+                errors,
+            },
+            self.into(),
+            ctx.clone(),
+            exec_state.pipe_value().map(|v| Arg::new(v.clone(), callsite)),
+        );
+
+        match ctx.stdlib.get_rust_function(fn_name) {
+            Some(func) => {
+                let def: FunctionDefinition = (&*func).into();
+                // All std lib functions return a value, so the unwrap is safe.
+                def.call_kw(Some(func.name()), exec_state, ctx, args, callsite)
+                    .await
+                    .map(Option::unwrap)
+                    .map_err(|e| {
+                        // This is used for the backtrace display.  We don't add
+                        // another location the way we do for user-defined
+                        // functions because the error uses the Args, which
+                        // already points here.
+                        e.set_last_backtrace_fn_name(Some(func.name()))
+                    })
+            }
+            None => {
+                // Clone the function so that we can use a mutable reference to
+                // exec_state.
+                let func = fn_name.get_result(exec_state, ctx).await?.clone();
+
+                let Some(fn_src) = func.as_fn() else {
+                    return Err(KclError::Semantic(KclErrorDetails::new(
+                        "cannot call this because it isn't a function".to_string(),
+                        vec![callsite],
+                    )));
+                };
+
+                let return_value = fn_src
+                    .call_kw(Some(fn_name.to_string()), exec_state, ctx, args, callsite)
+                    .await
+                    .map_err(|e| {
+                        // Add the call expression to the source ranges.
+                        //
+                        // TODO: Use the name that the function was defined
+                        // with, not the identifier it was used with.
+                        e.add_unwind_location(Some(fn_name.name.name.clone()), callsite)
+                    })?;
+
+                let result = return_value.ok_or_else(move || {
+                    let mut source_ranges: Vec<SourceRange> = vec![callsite];
+                    // We want to send the source range of the original function.
+                    if let KclValue::Function { meta, .. } = func {
+                        source_ranges = meta.iter().map(|m| m.source_range).collect();
+                    };
+                    KclError::UndefinedValue(KclErrorDetails::new(
+                        format!("Result of user-defined function {} is undefined", fn_name),
+                        source_ranges,
+                    ))
+                })?;
+
+                Ok(result)
+            }
+        }
+    }
+}
+
+impl FunctionDefinition<'_> {
+    pub async fn call_kw(
+        &self,
+        fn_name: Option<String>,
+        exec_state: &mut ExecState,
+        ctx: &ExecutorContext,
+        mut args: Args,
+        callsite: SourceRange,
+    ) -> Result<Option<KclValue>, KclError> {
+        if self.deprecated {
+            exec_state.warn(CompilationError::err(
+                callsite,
+                format!(
+                    "{} is deprecated, see the docs for a recommended replacement",
+                    match &fn_name {
+                        Some(n) => format!("`{n}`"),
+                        None => "This function".to_owned(),
+                    }
+                ),
+            ));
+        }
+
+        type_check_params_kw(fn_name.as_deref(), self, &mut args.kw_args, exec_state)?;
+
+        // Don't early return until the stack frame is popped!
+        self.body.prep_mem(exec_state);
+
+        let op = if self.include_in_feature_tree {
+            let op_labeled_args = args
+                .kw_args
+                .labeled
+                .iter()
+                .map(|(k, arg)| (k.clone(), OpArg::new(OpKclValue::from(&arg.value), arg.source_range)))
+                .collect();
+
+            if self.is_std {
+                Some(Operation::StdLibCall {
+                    name: fn_name.clone().unwrap_or_else(|| "unknown function".to_owned()),
+                    unlabeled_arg: args
+                        .unlabeled_kw_arg_unconverted()
+                        .map(|arg| OpArg::new(OpKclValue::from(&arg.value), arg.source_range)),
+                    labeled_args: op_labeled_args,
+                    source_range: callsite,
+                    is_error: false,
+                })
+            } else {
+                exec_state.push_op(Operation::GroupBegin {
+                    group: Group::FunctionCall {
+                        name: fn_name.clone(),
+                        function_source_range: self.as_source_range().unwrap(),
+                        unlabeled_arg: args
+                            .kw_args
+                            .unlabeled
+                            .as_ref()
+                            .map(|arg| OpArg::new(OpKclValue::from(&arg.1.value), arg.1.source_range)),
+                        labeled_args: op_labeled_args,
+                    },
+                    source_range: callsite,
+                });
+
+                None
+            }
+        } else {
+            None
+        };
+
+        let mut result = match &self.body {
+            FunctionBody::Rust(f) => f(exec_state, args).await.map(Some),
+            FunctionBody::Kcl(f, _) => {
+                if let Err(e) = assign_args_to_params_kw(self, args, exec_state) {
+                    exec_state.mut_stack().pop_env();
+                    return Err(e);
+                }
+
+                ctx.exec_block(f, exec_state, BodyType::Block).await.map(|_| {
+                    exec_state
+                        .stack()
+                        .get(memory::RETURN_NAME, f.as_source_range())
+                        .ok()
+                        .cloned()
+                })
+            }
+        };
+
+        exec_state.mut_stack().pop_env();
+
+        if let Some(mut op) = op {
+            op.set_std_lib_call_is_error(result.is_err());
+            // Track call operation.  We do this after the call
+            // since things like patternTransform may call user code
+            // before running, and we will likely want to use the
+            // return value. The call takes ownership of the args,
+            // so we need to build the op before the call.
+            exec_state.push_op(op);
+        } else if !self.is_std {
+            exec_state.push_op(Operation::GroupEnd);
+        }
+
+        if self.is_std {
+            if let Ok(Some(result)) = &mut result {
+                update_memory_for_tags_of_geometry(result, exec_state)?;
+            }
+        }
+
+        coerce_result_type(result, self, exec_state)
+    }
+
+    // Postcondition: result.is_some() if function is not in the standard library.
+    fn as_source_range(&self) -> Option<SourceRange> {
+        match &self.body {
+            FunctionBody::Rust(_) => None,
+            FunctionBody::Kcl(p, _) => Some(p.as_source_range()),
+        }
+    }
+}
+
+impl FunctionBody<'_> {
+    fn prep_mem(&self, exec_state: &mut ExecState) {
+        match self {
+            FunctionBody::Rust(_) => exec_state.mut_stack().push_new_env_for_rust_call(),
+            FunctionBody::Kcl(_, memory) => exec_state.mut_stack().push_new_env_for_call(*memory),
+        }
+    }
+}
+
+impl FunctionSource {
+    pub async fn call_kw(
+        &self,
+        fn_name: Option<String>,
+        exec_state: &mut ExecState,
+        ctx: &ExecutorContext,
+        args: Args,
+        callsite: SourceRange,
+    ) -> Result<Option<KclValue>, KclError> {
+        let def: FunctionDefinition = self.into();
+        def.call_kw(fn_name, exec_state, ctx, args, callsite).await
+    }
+}
+
+fn update_memory_for_tags_of_geometry(result: &mut KclValue, exec_state: &mut ExecState) -> Result<(), KclError> {
+    // If the return result is a sketch or solid, we want to update the
+    // memory for the tags of the group.
+    // TODO: This could probably be done in a better way, but as of now this was my only idea
+    // and it works.
+    match result {
+        KclValue::Sketch { value } => {
+            for (name, tag) in value.tags.iter() {
+                if exec_state.stack().cur_frame_contains(name) {
+                    exec_state.mut_stack().update(name, |v, _| {
+                        v.as_mut_tag().unwrap().merge_info(tag);
+                    });
+                } else {
+                    exec_state
+                        .mut_stack()
+                        .add(
+                            name.to_owned(),
+                            KclValue::TagIdentifier(Box::new(tag.clone())),
+                            SourceRange::default(),
+                        )
+                        .unwrap();
+                }
+            }
+        }
+        KclValue::Solid { ref mut value } => {
+            for v in &value.value {
+                if let Some(tag) = v.get_tag() {
+                    // Get the past tag and update it.
+                    let tag_id = if let Some(t) = value.sketch.tags.get(&tag.name) {
+                        let mut t = t.clone();
+                        let Some(info) = t.get_cur_info() else {
+                            return Err(KclError::Internal(KclErrorDetails::new(
+                                format!("Tag {} does not have path info", tag.name),
+                                vec![tag.into()],
+                            )));
+                        };
+
+                        let mut info = info.clone();
+                        info.surface = Some(v.clone());
+                        info.sketch = value.id;
+                        t.info.push((exec_state.stack().current_epoch(), info));
+                        t
+                    } else {
+                        // It's probably a fillet or a chamfer.
+                        // Initialize it.
+                        TagIdentifier {
+                            value: tag.name.clone(),
+                            info: vec![(
+                                exec_state.stack().current_epoch(),
+                                TagEngineInfo {
+                                    id: v.get_id(),
+                                    surface: Some(v.clone()),
+                                    path: None,
+                                    sketch: value.id,
+                                },
+                            )],
+                            meta: vec![Metadata {
+                                source_range: tag.clone().into(),
+                            }],
+                        }
+                    };
+
+                    // update the sketch tags.
+                    value.sketch.merge_tags(Some(&tag_id).into_iter());
+
+                    if exec_state.stack().cur_frame_contains(&tag.name) {
+                        exec_state.mut_stack().update(&tag.name, |v, _| {
+                            v.as_mut_tag().unwrap().merge_info(&tag_id);
+                        });
+                    } else {
+                        exec_state
+                            .mut_stack()
+                            .add(
+                                tag.name.clone(),
+                                KclValue::TagIdentifier(Box::new(tag_id)),
+                                SourceRange::default(),
+                            )
+                            .unwrap();
+                    }
+                }
+            }
+
+            // Find the stale sketch in memory and update it.
+            if !value.sketch.tags.is_empty() {
+                let sketches_to_update: Vec<_> = exec_state
+                    .stack()
+                    .find_keys_in_current_env(|v| match v {
+                        KclValue::Sketch { value: sk } => sk.original_id == value.sketch.original_id,
+                        _ => false,
+                    })
+                    .cloned()
+                    .collect();
+
+                for k in sketches_to_update {
+                    exec_state.mut_stack().update(&k, |v, _| {
+                        let sketch = v.as_mut_sketch().unwrap();
+                        sketch.merge_tags(value.sketch.tags.values());
+                    });
+                }
+            }
+        }
+        KclValue::Tuple { value, .. } | KclValue::HomArray { value, .. } => {
+            for v in value {
+                update_memory_for_tags_of_geometry(v, exec_state)?;
+            }
+        }
+        _ => {}
+    }
+    Ok(())
+}
+
+fn type_check_params_kw(
+    fn_name: Option<&str>,
+    fn_def: &FunctionDefinition<'_>,
+    args: &mut KwArgs,
+    exec_state: &mut ExecState,
+) -> Result<(), KclError> {
+    // If it's possible the input arg was meant to be labelled and we probably don't want to use
+    // it as the input arg, then treat it as labelled.
+    if let Some((Some(label), _)) = &args.unlabeled {
+        if (fn_def.input_arg.is_none() || exec_state.pipe_value().is_some())
+            && fn_def.named_args.iter().any(|p| p.0 == label)
+            && !args.labeled.contains_key(label)
+        {
+            let (label, arg) = args.unlabeled.take().unwrap();
+            args.labeled.insert(label.unwrap(), arg);
+        }
+    }
+
+    for (label, arg) in &mut args.labeled {
+        match fn_def.named_args.get(label) {
+            Some((_, ty)) => {
+                if let Some(ty) = ty {
+                    arg.value = arg
+                        .value
+                        .coerce(
+                            &RuntimeType::from_parsed(ty.clone(), exec_state, arg.source_range).map_err(|e| KclError::Semantic(e.into()))?,
+                            exec_state,
+                        )
+                        .map_err(|e| {
+                            let mut message = format!(
+                                "{label} requires a value with type `{}`, but found {}",
+                                ty,
+                                arg.value.human_friendly_type(),
+                            );
+                            if let Some(ty) = e.explicit_coercion {
+                                // TODO if we have access to the AST for the argument we could choose which example to suggest.
+                                message = format!("{message}\n\nYou may need to add information about the type of the argument, for example:\n  using a numeric suffix: `42{ty}`\n  or using type ascription: `foo(): number({ty})`");
+                            }
+                            KclError::Semantic(KclErrorDetails::new(
+                                message,
+                                vec![arg.source_range],
+                            ))
+                        })?;
+                }
+            }
+            None => {
+                exec_state.err(CompilationError::err(
+                    arg.source_range,
+                    format!(
+                        "`{label}` is not an argument of {}",
+                        fn_name
+                            .map(|n| format!("`{}`", n))
+                            .unwrap_or_else(|| "this function".to_owned()),
+                    ),
+                ));
+            }
+        }
+    }
+
+    if !args.errors.is_empty() {
+        let actuals = args.labeled.keys();
+        let formals: Vec<_> = fn_def
+            .named_args
+            .keys()
+            .filter_map(|name| {
+                if actuals.clone().any(|a| a == name) {
+                    return None;
+                }
+
+                Some(format!("`{name}`"))
+            })
+            .collect();
+
+        let suggestion = if formals.is_empty() {
+            String::new()
+        } else {
+            format!("; suggested labels: {}", formals.join(", "))
+        };
+
+        let mut errors = args.errors.iter().map(|e| {
+            CompilationError::err(
+                e.source_range,
+                format!("This argument needs a label, but it doesn't have one{suggestion}"),
+            )
+        });
+
+        let first = errors.next().unwrap();
+        errors.for_each(|e| exec_state.err(e));
+
+        return Err(KclError::Semantic(first.into()));
+    }
+
+    if let Some(arg) = &mut args.unlabeled {
+        if let Some((_, Some(ty))) = &fn_def.input_arg {
+            arg.1.value = arg
+                .1
+                .value
+                .coerce(
+                    &RuntimeType::from_parsed(ty.clone(), exec_state, arg.1.source_range)
+                        .map_err(|e| KclError::Semantic(e.into()))?,
+                    exec_state,
+                )
+                .map_err(|_| {
+                    KclError::Semantic(KclErrorDetails::new(
+                        format!(
+                            "The input argument of {} requires a value with type `{}`, but found {}",
+                            fn_name
+                                .map(|n| format!("`{}`", n))
+                                .unwrap_or_else(|| "this function".to_owned()),
+                            ty,
+                            arg.1.value.human_friendly_type()
+                        ),
+                        vec![arg.1.source_range],
+                    ))
+                })?;
+        }
+    } else if let Some((name, _)) = &fn_def.input_arg {
+        if let Some(arg) = args.labeled.get(name) {
+            exec_state.err(CompilationError::err(
+                arg.source_range,
+                format!(
+                    "{} expects an unlabeled first parameter (`@{name}`), but it is labelled in the call",
+                    fn_name
+                        .map(|n| format!("The function `{}`", n))
+                        .unwrap_or_else(|| "This function".to_owned()),
+                ),
+            ));
+        }
+    }
+
+    Ok(())
+}
+
+fn assign_args_to_params_kw(
+    fn_def: &FunctionDefinition<'_>,
+    args: Args,
+    exec_state: &mut ExecState,
+) -> Result<(), KclError> {
+    // Add the arguments to the memory.  A new call frame should have already
+    // been created.
+    let source_ranges = fn_def.as_source_range().into_iter().collect();
+
+    for (name, (default, _)) in fn_def.named_args.iter() {
+        let arg = args.kw_args.labeled.get(name);
+        match arg {
+            Some(arg) => {
+                exec_state.mut_stack().add(
+                    name.clone(),
+                    arg.value.clone(),
+                    arg.source_ranges().pop().unwrap_or(SourceRange::synthetic()),
+                )?;
+            }
+            None => match default {
+                Some(ref default_val) => {
+                    let value = KclValue::from_default_param(default_val.clone(), exec_state);
+                    exec_state
+                        .mut_stack()
+                        .add(name.clone(), value, default_val.source_range())?;
+                }
+                None => {
+                    return Err(KclError::Semantic(KclErrorDetails::new(
+                        format!(
+                            "This function requires a parameter {}, but you haven't passed it one.",
+                            name
+                        ),
+                        source_ranges,
+                    )));
+                }
+            },
+        }
+    }
+
+    if let Some((param_name, _)) = &fn_def.input_arg {
+        let unlabelled = args.unlabeled_kw_arg_unconverted();
+
+        let Some(unlabeled) = unlabelled else {
+            return Err(if args.kw_args.labeled.contains_key(param_name) {
+                KclError::Semantic(KclErrorDetails::new(
+                    format!("The function does declare a parameter named '{param_name}', but this parameter doesn't use a label. Try removing the `{param_name}:`"),
+                    source_ranges,
+                ))
+            } else {
+                KclError::Semantic(KclErrorDetails::new(
+                    "This function expects an unlabeled first parameter, but you haven't passed it one.".to_owned(),
+                    source_ranges,
+                ))
+            });
+        };
+        exec_state.mut_stack().add(
+            param_name.clone(),
+            unlabeled.value.clone(),
+            unlabeled.source_ranges().pop().unwrap_or(SourceRange::synthetic()),
+        )?;
+    }
+
+    Ok(())
+}
+
+fn coerce_result_type(
+    result: Result<Option<KclValue>, KclError>,
+    fn_def: &FunctionDefinition<'_>,
+    exec_state: &mut ExecState,
+) -> Result<Option<KclValue>, KclError> {
+    if let Ok(Some(val)) = result {
+        if let Some(ret_ty) = &fn_def.return_type {
+            let mut ty = RuntimeType::from_parsed(ret_ty.inner.clone(), exec_state, ret_ty.as_source_range())
+                .map_err(|e| KclError::Semantic(e.into()))?;
+            // Treat `[T; 1+]` as `T | [T; 1+]` (which can't yet be expressed in our syntax of types).
+            // This is a very specific hack which exists because some std functions can produce arrays
+            // but usually only make a singleton and the frontend expects the singleton.
+            // If we can make the frontend work on arrays (or at least arrays of length 1), then this
+            // can be removed.
+            // I believe this is safe, since anywhere which requires an array should coerce the singleton
+            // to an array and we only do this hack for return values.
+            if let RuntimeType::Array(inner, ArrayLen::NonEmpty) = &ty {
+                ty = RuntimeType::Union(vec![(**inner).clone(), ty]);
+            }
+            let val = val.coerce(&ty, exec_state).map_err(|_| {
+                KclError::Semantic(KclErrorDetails::new(
+                    format!(
+                        "This function requires its result to be of type `{}`, but found {}",
+                        ty.human_friendly_type(),
+                        val.human_friendly_type(),
+                    ),
+                    ret_ty.as_source_ranges(),
+                ))
+            })?;
+            Ok(Some(val))
+        } else {
+            Ok(Some(val))
+        }
+    } else {
+        result
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use std::sync::Arc;
+
+    use super::*;
+    use crate::{
+        execution::{memory::Stack, parse_execute, types::NumericType, ContextType},
+        parsing::ast::types::{DefaultParamVal, Identifier, Parameter},
+    };
+
+    #[tokio::test(flavor = "multi_thread")]
+    async fn test_assign_args_to_params() {
+        // Set up a little framework for this test.
+        fn mem(number: usize) -> KclValue {
+            KclValue::Number {
+                value: number as f64,
+                ty: NumericType::count(),
+                meta: Default::default(),
+            }
+        }
+        fn ident(s: &'static str) -> Node<Identifier> {
+            Node::no_src(Identifier {
+                name: s.to_owned(),
+                digest: None,
+            })
+        }
+        fn opt_param(s: &'static str) -> Parameter {
+            Parameter {
+                identifier: ident(s),
+                type_: None,
+                default_value: Some(DefaultParamVal::none()),
+                labeled: true,
+                digest: None,
+            }
+        }
+        fn req_param(s: &'static str) -> Parameter {
+            Parameter {
+                identifier: ident(s),
+                type_: None,
+                default_value: None,
+                labeled: true,
+                digest: None,
+            }
+        }
+        fn additional_program_memory(items: &[(String, KclValue)]) -> Stack {
+            let mut program_memory = Stack::new_for_tests();
+            for (name, item) in items {
+                program_memory
+                    .add(name.clone(), item.clone(), SourceRange::default())
+                    .unwrap();
+            }
+            program_memory
+        }
+        // Declare the test cases.
+        for (test_name, params, args, expected) in [
+            ("empty", Vec::new(), Vec::new(), Ok(additional_program_memory(&[]))),
+            (
+                "all params required, and all given, should be OK",
+                vec![req_param("x")],
+                vec![("x", mem(1))],
+                Ok(additional_program_memory(&[("x".to_owned(), mem(1))])),
+            ),
+            (
+                "all params required, none given, should error",
+                vec![req_param("x")],
+                vec![],
+                Err(KclError::Semantic(KclErrorDetails::new(
+                    "This function requires a parameter x, but you haven't passed it one.".to_owned(),
+                    vec![SourceRange::default()],
+                ))),
+            ),
+            (
+                "all params optional, none given, should be OK",
+                vec![opt_param("x")],
+                vec![],
+                Ok(additional_program_memory(&[("x".to_owned(), KclValue::none())])),
+            ),
+            (
+                "mixed params, too few given",
+                vec![req_param("x"), opt_param("y")],
+                vec![],
+                Err(KclError::Semantic(KclErrorDetails::new(
+                    "This function requires a parameter x, but you haven't passed it one.".to_owned(),
+                    vec![SourceRange::default()],
+                ))),
+            ),
+            (
+                "mixed params, minimum given, should be OK",
+                vec![req_param("x"), opt_param("y")],
+                vec![("x", mem(1))],
+                Ok(additional_program_memory(&[
+                    ("x".to_owned(), mem(1)),
+                    ("y".to_owned(), KclValue::none()),
+                ])),
+            ),
+            (
+                "mixed params, maximum given, should be OK",
+                vec![req_param("x"), opt_param("y")],
+                vec![("x", mem(1)), ("y", mem(2))],
+                Ok(additional_program_memory(&[
+                    ("x".to_owned(), mem(1)),
+                    ("y".to_owned(), mem(2)),
+                ])),
+            ),
+        ] {
+            // Run each test.
+            let func_expr = Node::no_src(FunctionExpression {
+                params,
+                body: Program::empty(),
+                return_type: None,
+                digest: None,
+            });
+            let func_src = FunctionSource::User {
+                ast: Box::new(func_expr),
+                settings: Default::default(),
+                memory: EnvironmentRef::dummy(),
+            };
+            let labeled = args
+                .iter()
+                .map(|(name, value)| {
+                    let arg = Arg::new(value.clone(), SourceRange::default());
+                    ((*name).to_owned(), arg)
+                })
+                .collect::<IndexMap<_, _>>();
+            let exec_ctxt = ExecutorContext {
+                engine: Arc::new(Box::new(
+                    crate::engine::conn_mock::EngineConnection::new().await.unwrap(),
+                )),
+                fs: Arc::new(crate::fs::FileManager::new()),
+                stdlib: Arc::new(crate::std::StdLib::new()),
+                settings: Default::default(),
+                context_type: ContextType::Mock,
+            };
+            let mut exec_state = ExecState::new(&exec_ctxt);
+            exec_state.mod_local.stack = Stack::new_for_tests();
+
+            let args = Args::new_kw(
+                KwArgs {
+                    unlabeled: None,
+                    labeled,
+                    errors: Vec::new(),
+                },
+                SourceRange::default(),
+                exec_ctxt,
+                None,
+            );
+            let actual = assign_args_to_params_kw(&(&func_src).into(), args, &mut exec_state)
+                .map(|_| exec_state.mod_local.stack);
+            assert_eq!(
+                actual, expected,
+                "failed test '{test_name}':\ngot {actual:?}\nbut expected\n{expected:?}"
+            );
+        }
+    }
+
+    #[tokio::test(flavor = "multi_thread")]
+    async fn type_check_user_args() {
+        let program = r#"fn makeMessage(prefix: string, suffix: string) {
+  return prefix + suffix
+}
+
+msg1 = makeMessage(prefix = "world", suffix = " hello")
+msg2 = makeMessage(prefix = 1, suffix = 3)"#;
+        let err = parse_execute(program).await.unwrap_err();
+        assert_eq!(
+            err.message(),
+            "prefix requires a value with type `string`, but found number(default units)"
+        )
+    }
+}

rust/kcl-lib/src/execution/geometry.rs

@@ -8,12 +8,12 @@ use parse_display::{Display, FromStr};
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 
-#[cfg(feature = "artifact-graph")]
-use crate::execution::ArtifactId;
 use crate::{
     engine::{PlaneName, DEFAULT_PLANE_INFO},
     errors::{KclError, KclErrorDetails},
-    execution::{types::NumericType, ExecState, ExecutorContext, Metadata, TagEngineInfo, TagIdentifier, UnitLen},
+    execution::{
+        types::NumericType, ArtifactId, ExecState, ExecutorContext, Metadata, TagEngineInfo, TagIdentifier, UnitLen,
+    },
     parsing::ast::types::{Node, NodeRef, TagDeclarator, TagNode},
     std::{args::TyF64, sketch::PlaneData},
 };
@@ -256,7 +256,6 @@ pub struct Helix {
     /// The id of the helix.
     pub value: uuid::Uuid,
     /// The artifact ID.
-    #[cfg(feature = "artifact-graph")]
     pub artifact_id: ArtifactId,
     /// Number of revolutions.
     pub revolutions: f64,
@@ -278,7 +277,6 @@ pub struct Plane {
     /// The id of the plane.
     pub id: uuid::Uuid,
     /// The artifact ID.
-    #[cfg(feature = "artifact-graph")]
     pub artifact_id: ArtifactId,
     // The code for the plane either a string or custom.
     pub value: PlaneType,
@@ -471,18 +469,18 @@ impl TryFrom<PlaneData> for PlaneInfo {
             PlaneData::NegYZ => PlaneName::NegYz,
             PlaneData::Plane(_) => {
                 // We will never get here since we already checked for PlaneData::Plane.
-                return Err(KclError::Internal(KclErrorDetails {
-                    message: format!("PlaneData {:?} not found", value),
-                    source_ranges: Default::default(),
-                }));
+                return Err(KclError::Internal(KclErrorDetails::new(
+                    format!("PlaneData {:?} not found", value),
+                    Default::default(),
+                )));
             }
         };
 
         let info = DEFAULT_PLANE_INFO.get(&name).ok_or_else(|| {
-            KclError::Internal(KclErrorDetails {
-                message: format!("Plane {} not found", name),
-                source_ranges: Default::default(),
-            })
+            KclError::Internal(KclErrorDetails::new(
+                format!("Plane {} not found", name),
+                Default::default(),
+            ))
         })?;
 
         Ok(info.clone())
@@ -508,7 +506,6 @@ impl Plane {
         let id = exec_state.next_uuid();
         Ok(Plane {
             id,
-            #[cfg(feature = "artifact-graph")]
             artifact_id: id.into(),
             info: PlaneInfo::try_from(value.clone())?,
             value: value.into(),
@@ -530,7 +527,6 @@ pub struct Face {
     /// The id of the face.
     pub id: uuid::Uuid,
     /// The artifact ID.
-    #[cfg(feature = "artifact-graph")]
     pub artifact_id: ArtifactId,
     /// The tag of the face.
     pub value: String,
@@ -584,7 +580,6 @@ pub struct Sketch {
     pub tags: IndexMap<String, TagIdentifier>,
     /// The original id of the sketch. This stays the same even if the sketch is
     /// is sketched on face etc.
-    #[cfg(feature = "artifact-graph")]
     pub artifact_id: ArtifactId,
     #[ts(skip)]
     pub original_id: uuid::Uuid,
@@ -748,7 +743,6 @@ pub struct Solid {
     /// The id of the solid.
     pub id: uuid::Uuid,
     /// The artifact ID of the solid.  Unlike `id`, this doesn't change.
-    #[cfg(feature = "artifact-graph")]
     pub artifact_id: ArtifactId,
     /// The extrude surfaces.
     pub value: Vec<ExtrudeSurface>,

rust/kcl-lib/src/execution/import.rs

@@ -37,53 +37,43 @@ pub async fn import_foreign(
 ) -> Result<PreImportedGeometry, KclError> {
     // Make sure the file exists.
     if !ctxt.fs.exists(file_path, source_range).await? {
-        return Err(KclError::Semantic(KclErrorDetails {
-            message: format!("File `{}` does not exist.", file_path.display()),
-            source_ranges: vec![source_range],
-        }));
+        return Err(KclError::Semantic(KclErrorDetails::new(
+            format!("File `{}` does not exist.", file_path.display()),
+            vec![source_range],
+        )));
     }
 
     let ext_format = get_import_format_from_extension(file_path.extension().ok_or_else(|| {
-        KclError::Semantic(KclErrorDetails {
-            message: format!("No file extension found for `{}`", file_path.display()),
-            source_ranges: vec![source_range],
-        })
+        KclError::Semantic(KclErrorDetails::new(
+            format!("No file extension found for `{}`", file_path.display()),
+            vec![source_range],
+        ))
     })?)
-    .map_err(|e| {
-        KclError::Semantic(KclErrorDetails {
-            message: e.to_string(),
-            source_ranges: vec![source_range],
-        })
-    })?;
+    .map_err(|e| KclError::Semantic(KclErrorDetails::new(e.to_string(), vec![source_range])))?;
 
     // Get the format type from the extension of the file.
     let format = if let Some(format) = format {
         // Validate the given format with the extension format.
-        validate_extension_format(ext_format, format.clone()).map_err(|e| {
-            KclError::Semantic(KclErrorDetails {
-                message: e.to_string(),
-                source_ranges: vec![source_range],
-            })
-        })?;
+        validate_extension_format(ext_format, format.clone())
+            .map_err(|e| KclError::Semantic(KclErrorDetails::new(e.to_string(), vec![source_range])))?;
         format
     } else {
         ext_format
     };
 
     // Get the file contents for each file path.
-    let file_contents = ctxt.fs.read(file_path, source_range).await.map_err(|e| {
-        KclError::Semantic(KclErrorDetails {
-            message: e.to_string(),
-            source_ranges: vec![source_range],
-        })
-    })?;
+    let file_contents = ctxt
+        .fs
+        .read(file_path, source_range)
+        .await
+        .map_err(|e| KclError::Semantic(KclErrorDetails::new(e.to_string(), vec![source_range])))?;
 
     // We want the file_path to be without the parent.
     let file_name = file_path.file_name().map(|p| p.to_string()).ok_or_else(|| {
-        KclError::Semantic(KclErrorDetails {
-            message: format!("Could not get the file name from the path `{}`", file_path.display()),
-            source_ranges: vec![source_range],
-        })
+        KclError::Semantic(KclErrorDetails::new(
+            format!("Could not get the file name from the path `{}`", file_path.display()),
+            vec![source_range],
+        ))
     })?;
     let mut import_files = vec![kcmc::ImportFile {
         path: file_name.to_string(),
@@ -96,12 +86,8 @@ pub async fn import_foreign(
         // Check if the file is a binary gltf file, in that case we don't need to import the bin
         // file.
         if !file_contents.starts_with(b"glTF") {
-            let json = gltf_json::Root::from_slice(&file_contents).map_err(|e| {
-                KclError::Semantic(KclErrorDetails {
-                    message: e.to_string(),
-                    source_ranges: vec![source_range],
-                })
-            })?;
+            let json = gltf_json::Root::from_slice(&file_contents)
+                .map_err(|e| KclError::Semantic(KclErrorDetails::new(e.to_string(), vec![source_range])))?;
 
             // Read the gltf file and check if there is a bin file.
             for buffer in json.buffers.iter() {
@@ -109,18 +95,16 @@ pub async fn import_foreign(
                     if !uri.starts_with("data:") {
                         // We want this path relative to the file_path given.
                         let bin_path = file_path.parent().map(|p| p.join(uri)).ok_or_else(|| {
-                            KclError::Semantic(KclErrorDetails {
-                                message: format!("Could not get the parent path of the file `{}`", file_path.display()),
-                                source_ranges: vec![source_range],
-                            })
+                            KclError::Semantic(KclErrorDetails::new(
+                                format!("Could not get the parent path of the file `{}`", file_path.display()),
+                                vec![source_range],
+                            ))
                         })?;
 
-                        let bin_contents = ctxt.fs.read(&bin_path, source_range).await.map_err(|e| {
-                            KclError::Semantic(KclErrorDetails {
-                                message: e.to_string(),
-                                source_ranges: vec![source_range],
-                            })
-                        })?;
+                        let bin_contents =
+                            ctxt.fs.read(&bin_path, source_range).await.map_err(|e| {
+                                KclError::Semantic(KclErrorDetails::new(e.to_string(), vec![source_range]))
+                            })?;
 
                         import_files.push(ImportFile {
                             path: uri.to_string(),
@@ -157,13 +141,13 @@ pub(super) fn format_from_annotations(
         if p.key.name == annotations::IMPORT_FORMAT {
             result = Some(
                 get_import_format_from_extension(annotations::expect_ident(&p.value)?).map_err(|_| {
-                    KclError::Semantic(KclErrorDetails {
-                        message: format!(
+                    KclError::Semantic(KclErrorDetails::new(
+                        format!(
                             "Unknown format for import, expected one of: {}",
                             crate::IMPORT_FILE_EXTENSIONS.join(", ")
                         ),
-                        source_ranges: vec![p.as_source_range()],
-                    })
+                        vec![p.as_source_range()],
+                    ))
                 })?,
             );
             break;
@@ -175,10 +159,10 @@ pub(super) fn format_from_annotations(
             path.extension()
                 .and_then(|ext| get_import_format_from_extension(ext).ok())
         })
-        .ok_or(KclError::Semantic(KclErrorDetails {
-            message: "Unknown or missing extension, and no specified format for imported file".to_owned(),
-            source_ranges: vec![import_source_range],
-        }))?;
+        .ok_or(KclError::Semantic(KclErrorDetails::new(
+            "Unknown or missing extension, and no specified format for imported file".to_owned(),
+            vec![import_source_range],
+        )))?;
 
     for p in props {
         match p.key.name.as_str() {
@@ -190,15 +174,15 @@ pub(super) fn format_from_annotations(
             }
             annotations::IMPORT_FORMAT => {}
             _ => {
-                return Err(KclError::Semantic(KclErrorDetails {
-                    message: format!(
+                return Err(KclError::Semantic(KclErrorDetails::new(
+                    format!(
                         "Unexpected annotation for import, expected one of: {}, {}, {}",
                         annotations::IMPORT_FORMAT,
                         annotations::IMPORT_COORDS,
                         annotations::IMPORT_LENGTH_UNIT
                     ),
-                    source_ranges: vec![p.as_source_range()],
-                }))
+                    vec![p.as_source_range()],
+                )))
             }
         }
     }
@@ -215,8 +199,8 @@ fn set_coords(fmt: &mut InputFormat3d, coords_str: &str, source_range: SourceRan
     }
 
     let Some(coords) = coords else {
-        return Err(KclError::Semantic(KclErrorDetails {
-            message: format!(
+        return Err(KclError::Semantic(KclErrorDetails::new(
+            format!(
                 "Unknown coordinate system: {coords_str}, expected one of: {}",
                 annotations::IMPORT_COORDS_VALUES
                     .iter()
@@ -224,8 +208,8 @@ fn set_coords(fmt: &mut InputFormat3d, coords_str: &str, source_range: SourceRan
                     .collect::<Vec<_>>()
                     .join(", ")
             ),
-            source_ranges: vec![source_range],
-        }));
+            vec![source_range],
+        )));
     };
 
     match fmt {
@@ -233,13 +217,13 @@ fn set_coords(fmt: &mut InputFormat3d, coords_str: &str, source_range: SourceRan
         InputFormat3d::Ply(opts) => opts.coords = coords,
         InputFormat3d::Stl(opts) => opts.coords = coords,
         _ => {
-            return Err(KclError::Semantic(KclErrorDetails {
-                message: format!(
+            return Err(KclError::Semantic(KclErrorDetails::new(
+                format!(
                     "`{}` option cannot be applied to the specified format",
                     annotations::IMPORT_COORDS
                 ),
-                source_ranges: vec![source_range],
-            }))
+                vec![source_range],
+            )))
         }
     }
 
@@ -254,13 +238,13 @@ fn set_length_unit(fmt: &mut InputFormat3d, units_str: &str, source_range: Sourc
         InputFormat3d::Ply(opts) => opts.units = units.into(),
         InputFormat3d::Stl(opts) => opts.units = units.into(),
         _ => {
-            return Err(KclError::Semantic(KclErrorDetails {
-                message: format!(
+            return Err(KclError::Semantic(KclErrorDetails::new(
+                format!(
                     "`{}` option cannot be applied to the specified format",
                     annotations::IMPORT_LENGTH_UNIT
                 ),
-                source_ranges: vec![source_range],
-            }))
+                vec![source_range],
+            )))
         }
     }