diff --git a/docs/kcl/angleToMatchLengthX.md b/docs/kcl/angleToMatchLengthX.md
index e638adfbe..e666283df 100644
--- a/docs/kcl/angleToMatchLengthX.md
+++ b/docs/kcl/angleToMatchLengthX.md
@@ -236,7 +236,7 @@ const extrusion = extrude(5, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -254,7 +254,7 @@ const extrusion = extrude(5, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -445,7 +445,7 @@ const extrusion = extrude(5, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -463,7 +463,7 @@ const extrusion = extrude(5, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/angleToMatchLengthY.md b/docs/kcl/angleToMatchLengthY.md
index b142e25ae..20243dab0 100644
--- a/docs/kcl/angleToMatchLengthY.md
+++ b/docs/kcl/angleToMatchLengthY.md
@@ -240,7 +240,7 @@ const extrusion = extrude(5, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -258,7 +258,7 @@ const extrusion = extrude(5, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -449,7 +449,7 @@ const extrusion = extrude(5, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -467,7 +467,7 @@ const extrusion = extrude(5, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/angledLine.md b/docs/kcl/angledLine.md
index 224648bae..432fcb642 100644
--- a/docs/kcl/angledLine.md
+++ b/docs/kcl/angledLine.md
@@ -155,7 +155,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -173,7 +173,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -364,7 +364,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -382,7 +382,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -575,7 +575,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -593,7 +593,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -784,7 +784,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -802,7 +802,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/angledLineOfXLength.md b/docs/kcl/angledLineOfXLength.md
index 61bee3866..2ff7573e9 100644
--- a/docs/kcl/angledLineOfXLength.md
+++ b/docs/kcl/angledLineOfXLength.md
@@ -154,7 +154,7 @@ const extrusion = extrude(10, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -172,7 +172,7 @@ const extrusion = extrude(10, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -363,7 +363,7 @@ const extrusion = extrude(10, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -381,7 +381,7 @@ const extrusion = extrude(10, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -574,7 +574,7 @@ const extrusion = extrude(10, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -592,7 +592,7 @@ const extrusion = extrude(10, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -783,7 +783,7 @@ const extrusion = extrude(10, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -801,7 +801,7 @@ const extrusion = extrude(10, sketch001)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/angledLineOfYLength.md b/docs/kcl/angledLineOfYLength.md
index 2428f0a86..dd87e7344 100644
--- a/docs/kcl/angledLineOfYLength.md
+++ b/docs/kcl/angledLineOfYLength.md
@@ -156,7 +156,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -174,7 +174,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -365,7 +365,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -383,7 +383,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -576,7 +576,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -594,7 +594,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -785,7 +785,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -803,7 +803,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/angledLineThatIntersects.md b/docs/kcl/angledLineThatIntersects.md
index df5c9475e..9e039ef23 100644
--- a/docs/kcl/angledLineThatIntersects.md
+++ b/docs/kcl/angledLineThatIntersects.md
@@ -248,7 +248,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -266,7 +266,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -457,7 +457,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -475,7 +475,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -668,7 +668,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -686,7 +686,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -877,7 +877,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -895,7 +895,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/angledLineToX.md b/docs/kcl/angledLineToX.md
index 459ec8590..27c299817 100644
--- a/docs/kcl/angledLineToX.md
+++ b/docs/kcl/angledLineToX.md
@@ -153,7 +153,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -171,7 +171,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -362,7 +362,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -380,7 +380,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -573,7 +573,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -591,7 +591,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -782,7 +782,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -800,7 +800,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/angledLineToY.md b/docs/kcl/angledLineToY.md
index c9ad13a92..ffc1f0fae 100644
--- a/docs/kcl/angledLineToY.md
+++ b/docs/kcl/angledLineToY.md
@@ -153,7 +153,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -171,7 +171,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -362,7 +362,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -380,7 +380,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -573,7 +573,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -591,7 +591,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -782,7 +782,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -800,7 +800,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/arc.md b/docs/kcl/arc.md
index 97b79c813..ac9fca561 100644
--- a/docs/kcl/arc.md
+++ b/docs/kcl/arc.md
@@ -166,7 +166,7 @@ const exampleSketch = startSketchOn('XZ')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -184,7 +184,7 @@ const exampleSketch = startSketchOn('XZ')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -375,7 +375,7 @@ const exampleSketch = startSketchOn('XZ')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -393,7 +393,7 @@ const exampleSketch = startSketchOn('XZ')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -586,7 +586,7 @@ const exampleSketch = startSketchOn('XZ')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -604,7 +604,7 @@ const exampleSketch = startSketchOn('XZ')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -795,7 +795,7 @@ const exampleSketch = startSketchOn('XZ')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -813,7 +813,7 @@ const exampleSketch = startSketchOn('XZ')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/bezierCurve.md b/docs/kcl/bezierCurve.md
index 3bfa1d06a..9db9871a9 100644
--- a/docs/kcl/bezierCurve.md
+++ b/docs/kcl/bezierCurve.md
@@ -159,7 +159,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -177,7 +177,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -368,7 +368,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -386,7 +386,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -579,7 +579,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -597,7 +597,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -788,7 +788,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -806,7 +806,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/chamfer.md b/docs/kcl/chamfer.md
index aed140064..29551c4f7 100644
--- a/docs/kcl/chamfer.md
+++ b/docs/kcl/chamfer.md
@@ -381,7 +381,7 @@ const mountingPlate = extrude(thickness, mountingPlateSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -399,7 +399,7 @@ const mountingPlate = extrude(thickness, mountingPlateSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -785,7 +785,7 @@ const mountingPlate = extrude(thickness, mountingPlateSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -803,7 +803,7 @@ const mountingPlate = extrude(thickness, mountingPlateSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/circle.md b/docs/kcl/circle.md
index 36b165dcd..6b26214c7 100644
--- a/docs/kcl/circle.md
+++ b/docs/kcl/circle.md
@@ -152,7 +152,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -170,7 +170,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -528,7 +528,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -546,7 +546,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -739,7 +739,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -757,7 +757,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -948,7 +948,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -966,7 +966,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/close.md b/docs/kcl/close.md
index eea54db00..251a383a6 100644
--- a/docs/kcl/close.md
+++ b/docs/kcl/close.md
@@ -154,7 +154,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -172,7 +172,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -363,7 +363,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -381,7 +381,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -574,7 +574,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -592,7 +592,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -783,7 +783,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -801,7 +801,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/extrude.md b/docs/kcl/extrude.md
index aa589b55d..569a75bca 100644
--- a/docs/kcl/extrude.md
+++ b/docs/kcl/extrude.md
@@ -179,7 +179,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -197,7 +197,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -389,7 +389,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -407,7 +407,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -719,7 +719,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -737,7 +737,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/fillet.md b/docs/kcl/fillet.md
index a4d353c29..06de606fe 100644
--- a/docs/kcl/fillet.md
+++ b/docs/kcl/fillet.md
@@ -411,7 +411,7 @@ const mountingPlate = extrude(thickness, mountingPlateSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -429,7 +429,7 @@ const mountingPlate = extrude(thickness, mountingPlateSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -815,7 +815,7 @@ const mountingPlate = extrude(thickness, mountingPlateSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -833,7 +833,7 @@ const mountingPlate = extrude(thickness, mountingPlateSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/helix.md b/docs/kcl/helix.md
index dc8ebd674..e5e2758ad 100644
--- a/docs/kcl/helix.md
+++ b/docs/kcl/helix.md
@@ -35,7 +35,7 @@ const part001 = startSketchOn('XY')
 	// Start angle (in degrees).
 	angleStart: number,
 	// Is the helix rotation counter clockwise? The default is `false`.
-	ccw: string,
+	ccw: bool,
 	// Length of the helix. If this argument is not provided, the height of the extrude group is used.
 	length: number,
 	// Number of revolutions.
@@ -282,7 +282,7 @@ const part001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -300,7 +300,7 @@ const part001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -677,7 +677,7 @@ const part001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -695,7 +695,7 @@ const part001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/hole.md b/docs/kcl/hole.md
index 0535e10dc..51a6d79af 100644
--- a/docs/kcl/hole.md
+++ b/docs/kcl/hole.md
@@ -165,7 +165,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -183,7 +183,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -375,7 +375,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -393,7 +393,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -577,7 +577,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -595,7 +595,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -786,7 +786,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -804,7 +804,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -988,7 +988,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -1006,7 +1006,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -1197,7 +1197,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -1215,7 +1215,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/lastSegX.md b/docs/kcl/lastSegX.md
index 5295c597d..dcf0959ac 100644
--- a/docs/kcl/lastSegX.md
+++ b/docs/kcl/lastSegX.md
@@ -145,7 +145,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -163,7 +163,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -354,7 +354,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -372,7 +372,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/lastSegY.md b/docs/kcl/lastSegY.md
index 89925430b..d507276b0 100644
--- a/docs/kcl/lastSegY.md
+++ b/docs/kcl/lastSegY.md
@@ -145,7 +145,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -163,7 +163,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -354,7 +354,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -372,7 +372,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/line.md b/docs/kcl/line.md
index c09b97757..a0e690b7f 100644
--- a/docs/kcl/line.md
+++ b/docs/kcl/line.md
@@ -158,7 +158,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -176,7 +176,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -367,7 +367,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -385,7 +385,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -578,7 +578,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -596,7 +596,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -787,7 +787,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -805,7 +805,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/lineTo.md b/docs/kcl/lineTo.md
index 08fefb642..dedc14384 100644
--- a/docs/kcl/lineTo.md
+++ b/docs/kcl/lineTo.md
@@ -145,7 +145,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -163,7 +163,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -354,7 +354,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -372,7 +372,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -565,7 +565,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -583,7 +583,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -774,7 +774,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -792,7 +792,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/patternCircular2d.md b/docs/kcl/patternCircular2d.md
index 79b469c80..626f6a528 100644
--- a/docs/kcl/patternCircular2d.md
+++ b/docs/kcl/patternCircular2d.md
@@ -45,7 +45,7 @@ const example = extrude(1, exampleSketch)
 	// The number of repetitions. Must be greater than 0. This excludes the original entity. For example, if `repetitions` is 1, the original entity will be copied once.
 	repetitions: number,
 	// Whether or not to rotate the duplicates as they are copied.
-	rotateDuplicates: string,
+	rotateDuplicates: bool,
 }
 ```
 * `sketch_group_set`: `SketchGroupSet` - A sketch group or a group of sketch groups. (REQUIRED)
@@ -163,7 +163,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -181,7 +181,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -373,7 +373,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -391,7 +391,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/patternCircular3d.md b/docs/kcl/patternCircular3d.md
index f95bf5262..83765e1f5 100644
--- a/docs/kcl/patternCircular3d.md
+++ b/docs/kcl/patternCircular3d.md
@@ -44,7 +44,7 @@ const example = extrude(-5, exampleSketch)
 	// The number of repetitions. Must be greater than 0. This excludes the original entity. For example, if `repetitions` is 1, the original entity will be copied once.
 	repetitions: number,
 	// Whether or not to rotate the duplicates as they are copied.
-	rotateDuplicates: string,
+	rotateDuplicates: bool,
 }
 ```
 * `extrude_group_set`: `ExtrudeGroupSet` - A extrude group or a group of extrude groups. (REQUIRED)
@@ -287,7 +287,7 @@ const example = extrude(-5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -305,7 +305,7 @@ const example = extrude(-5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/patternLinear2d.md b/docs/kcl/patternLinear2d.md
index e317d9f2e..313133ac7 100644
--- a/docs/kcl/patternLinear2d.md
+++ b/docs/kcl/patternLinear2d.md
@@ -156,7 +156,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -174,7 +174,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -366,7 +366,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -384,7 +384,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/patternLinear3d.md b/docs/kcl/patternLinear3d.md
index 9981f0f0d..5fb31e5f4 100644
--- a/docs/kcl/patternLinear3d.md
+++ b/docs/kcl/patternLinear3d.md
@@ -285,7 +285,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -303,7 +303,7 @@ const example = extrude(1, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/patternTransform.md b/docs/kcl/patternTransform.md
index cfbb5c8c2..5b3a03560 100644
--- a/docs/kcl/patternTransform.md
+++ b/docs/kcl/patternTransform.md
@@ -287,7 +287,7 @@ let vase = layer()
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -305,7 +305,7 @@ let vase = layer()
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/profileStart.md b/docs/kcl/profileStart.md
index 4c7f3d5ee..2abd0f627 100644
--- a/docs/kcl/profileStart.md
+++ b/docs/kcl/profileStart.md
@@ -146,7 +146,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -164,7 +164,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -355,7 +355,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -373,7 +373,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/profileStartX.md b/docs/kcl/profileStartX.md
index e52fa38e4..37067715e 100644
--- a/docs/kcl/profileStartX.md
+++ b/docs/kcl/profileStartX.md
@@ -141,7 +141,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -159,7 +159,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -350,7 +350,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -368,7 +368,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/profileStartY.md b/docs/kcl/profileStartY.md
index b7d8f593d..1980831f6 100644
--- a/docs/kcl/profileStartY.md
+++ b/docs/kcl/profileStartY.md
@@ -140,7 +140,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -158,7 +158,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -349,7 +349,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -367,7 +367,7 @@ const sketch001 = startSketchOn('XY')
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/revolve.md b/docs/kcl/revolve.md
index ccf491281..b758e91e9 100644
--- a/docs/kcl/revolve.md
+++ b/docs/kcl/revolve.md
@@ -384,7 +384,7 @@ uuid |
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -402,7 +402,7 @@ uuid |
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -593,7 +593,7 @@ uuid |
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -611,7 +611,7 @@ uuid |
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -920,7 +920,7 @@ uuid |
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -938,7 +938,7 @@ uuid |
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/shell.md b/docs/kcl/shell.md
index b3be5a8ff..5aadc3b00 100644
--- a/docs/kcl/shell.md
+++ b/docs/kcl/shell.md
@@ -399,7 +399,7 @@ shell({ faces: [myTag], thickness: 0.25 }, firstSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -417,7 +417,7 @@ shell({ faces: [myTag], thickness: 0.25 }, firstSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -794,7 +794,7 @@ shell({ faces: [myTag], thickness: 0.25 }, firstSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -812,7 +812,7 @@ shell({ faces: [myTag], thickness: 0.25 }, firstSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/startProfileAt.md b/docs/kcl/startProfileAt.md
index 30e9a0c00..c4f854f3f 100644
--- a/docs/kcl/startProfileAt.md
+++ b/docs/kcl/startProfileAt.md
@@ -224,7 +224,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -242,7 +242,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -527,7 +527,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -545,7 +545,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -736,7 +736,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -754,7 +754,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/startSketchAt.md b/docs/kcl/startSketchAt.md
index 37ea51a98..2ebdd57de 100644
--- a/docs/kcl/startSketchAt.md
+++ b/docs/kcl/startSketchAt.md
@@ -171,7 +171,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -189,7 +189,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -380,7 +380,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -398,7 +398,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/startSketchOn.md b/docs/kcl/startSketchOn.md
index b4f6335ac..3d3d94826 100644
--- a/docs/kcl/startSketchOn.md
+++ b/docs/kcl/startSketchOn.md
@@ -293,7 +293,7 @@ const a1 = startSketchOn({
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -311,7 +311,7 @@ const a1 = startSketchOn({
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -709,7 +709,7 @@ const a1 = startSketchOn({
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -727,7 +727,7 @@ const a1 = startSketchOn({
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/tangentialArc.md b/docs/kcl/tangentialArc.md
index cceb0c74a..3afc28c41 100644
--- a/docs/kcl/tangentialArc.md
+++ b/docs/kcl/tangentialArc.md
@@ -155,7 +155,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -173,7 +173,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -364,7 +364,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -382,7 +382,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -575,7 +575,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -593,7 +593,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -784,7 +784,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -802,7 +802,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/tangentialArcTo.md b/docs/kcl/tangentialArcTo.md
index 1b66836f9..e71cc830e 100644
--- a/docs/kcl/tangentialArcTo.md
+++ b/docs/kcl/tangentialArcTo.md
@@ -145,7 +145,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -163,7 +163,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -354,7 +354,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -372,7 +372,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -565,7 +565,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -583,7 +583,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -774,7 +774,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -792,7 +792,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/xLine.md b/docs/kcl/xLine.md
index 756784e89..ef42d32b9 100644
--- a/docs/kcl/xLine.md
+++ b/docs/kcl/xLine.md
@@ -148,7 +148,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -166,7 +166,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -357,7 +357,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -375,7 +375,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -568,7 +568,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -586,7 +586,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -777,7 +777,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -795,7 +795,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/xLineTo.md b/docs/kcl/xLineTo.md
index 27d975e10..9d3eb31a4 100644
--- a/docs/kcl/xLineTo.md
+++ b/docs/kcl/xLineTo.md
@@ -148,7 +148,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -166,7 +166,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -357,7 +357,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -375,7 +375,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -568,7 +568,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -586,7 +586,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -777,7 +777,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -795,7 +795,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/yLine.md b/docs/kcl/yLine.md
index 09ade740e..dc90b095e 100644
--- a/docs/kcl/yLine.md
+++ b/docs/kcl/yLine.md
@@ -146,7 +146,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -164,7 +164,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -355,7 +355,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -373,7 +373,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -566,7 +566,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -584,7 +584,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -775,7 +775,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -793,7 +793,7 @@ const example = extrude(10, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/docs/kcl/yLineTo.md b/docs/kcl/yLineTo.md
index f3605c6d6..4a9fd3b3a 100644
--- a/docs/kcl/yLineTo.md
+++ b/docs/kcl/yLineTo.md
@@ -144,7 +144,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -162,7 +162,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -353,7 +353,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -371,7 +371,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -564,7 +564,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -582,7 +582,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -773,7 +773,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
@@ -791,7 +791,7 @@ const example = extrude(5, exampleSketch)
 } |
 {
 	// arc's direction
-	ccw: string,
+	ccw: bool,
 	// the arc's center
 	center: [number, number],
 	// The from point.
diff --git a/src/wasm-lib/kcl/src/docs.rs b/src/wasm-lib/kcl/src/docs.rs
index 312973267..760c11f52 100644
--- a/src/wasm-lib/kcl/src/docs.rs
+++ b/src/wasm-lib/kcl/src/docs.rs
@@ -467,8 +467,14 @@ pub fn get_type_string_from_schema(schema: &schemars::schema::Schema) -> Result<
                 return Ok((fn_docs, true));
             }
 
-            if let Some(schemars::schema::SingleOrVec::Single(_string)) = &o.instance_type {
-                return Ok((Primitive::String.to_string(), false));
+            if let Some(schemars::schema::SingleOrVec::Single(single)) = &o.instance_type {
+                if schemars::schema::InstanceType::Boolean == **single {
+                    return Ok((Primitive::Bool.to_string(), false));
+                } else if schemars::schema::InstanceType::String == **single
+                    || schemars::schema::InstanceType::Null == **single
+                {
+                    return Ok((Primitive::String.to_string(), false));
+                }
             }
 
             if let Some(reference) = &o.reference {
@@ -630,8 +636,14 @@ pub fn get_autocomplete_snippet_from_schema(
                 return Ok(Some((index, fn_docs)));
             }
 
-            if let Some(schemars::schema::SingleOrVec::Single(_string)) = &o.instance_type {
-                return Ok(Some((index, format!(r#"${{{}:"string"}}"#, index))));
+            if let Some(schemars::schema::SingleOrVec::Single(single)) = &o.instance_type {
+                if schemars::schema::InstanceType::Boolean == **single {
+                    return Ok(Some((index, format!(r#"${{{}:false}}"#, index))));
+                } else if schemars::schema::InstanceType::String == **single {
+                    return Ok(Some((index, format!(r#"${{{}:"string"}}"#, index))));
+                } else if schemars::schema::InstanceType::Null == **single {
+                    return Ok(None);
+                }
             }
 
             anyhow::bail!("unknown type: {:#?}", o)
@@ -764,8 +776,14 @@ pub fn get_autocomplete_string_from_schema(schema: &schemars::schema::Schema) ->
                 return Ok(fn_docs);
             }
 
-            if let Some(schemars::schema::SingleOrVec::Single(_string)) = &o.instance_type {
-                return Ok(Primitive::String.to_string());
+            if let Some(schemars::schema::SingleOrVec::Single(single)) = &o.instance_type {
+                if schemars::schema::InstanceType::Boolean == **single {
+                    return Ok(Primitive::Bool.to_string());
+                } else if schemars::schema::InstanceType::String == **single
+                    || schemars::schema::InstanceType::Null == **single
+                {
+                    return Ok(Primitive::String.to_string());
+                }
             }
 
             anyhow::bail!("unknown type: {:#?}", o)
@@ -898,7 +916,7 @@ mod tests {
 	axis: [${1:3.14}, ${2:3.14}, ${3:3.14}],
 	center: [${2:3.14}, ${3:3.14}, ${4:3.14}],
 	repetitions: ${3:10},
-	rotateDuplicates: ${4:"string"},
+	rotateDuplicates: ${4:false},
 }, ${5:%})${}"#
         );
     }