kernelcad

Add Variable Sweep

add_variable_sweep

Use this when you need an organic swept solid whose cross-section changes along its length — a tapering body, horn, bottle, fairing, or duct — authored as a variable-section sweep along a spine. Insert a variableSweep(spine, sections, opts?) declaration into the user's .kcad.ts immediately before the last top-level return. The result is a Shape — chain .translate(...), .union(...), etc. via add_feature. spine_binding references an existing variable (Curve3D / Sketch / Vec3[]) in the source; each sections[i].profile_binding references an existing Sketch. Sections must be strictly increasing in t and span [0, 1]; first t=0, last t=1. Orientation is not exposed by this MCP tool until runtime orientation support is wired. Validates every binding exists in the source via regex before inserting (fast structured error vs capture-time stack). Returns the modified code + diagnostics. Side-effect-free.

Input Schema

TableJSON Schema

Name	Required	Description
`code`	Yes	The .kcad.ts source code.
`closed`	No	Optional closed-sweep flag.
`sections`	Yes	Varying cross-sections along the spine; at least 2 entries, strictly increasing in `t`, first t=0, last t=1.
`continuity`	No	Inter-section continuity; default 'C1'.
`binding_name`	No	JS const name for the new Shape binding (default: _sweep_<N>).
`spine_binding`	Yes	Existing variable name for a Curve3D / Sketch / Vec3[] declared earlier in the source.

Output Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 11, 2026

removedOutput schema / properties

Removed value: -{
-  "binding_name": {
-    "description": "JS const name bound to the new construct (when one was created).",
-    "type": "string"
-  },
-  "diagnostics": {
-    "description": "Diagnostics from re-evaluating the modified source.",
-    "items": {
-      "additionalProperties": true,
-      "type": "object"
-    },
-    "type": "array"
-  },
-  "error": {
-    "description": "Failure message (present when ok is false).",
-    "type": "string"
-  },
-  "new_code": {
-    "description": "Modified .kcad.ts source (present on success). Caller persists it.",
-    "type": "string"
-  },
-  "ok": {
-    "description": "Whether the edit applied and re-evaluated cleanly.",
-    "type": "boolean"
-  }
-}

removedOutput schema / required
```
Removed value: -[
-  "ok"
-]
```

Changed1 schema field changedJun 15, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "properties": {
+    "binding_name": {
+      "description": "JS const name bound to the new construct (when one was created).",
+      "type": "string"
+    },
+    "diagnostics": {
+      "description": "Diagnostics from re-evaluating the modified source.",
+      "items": {
+        "additionalProperties": true,
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "error": {
+      "description": "Failure message (present when ok is false).",
+      "type": "string"
+    },
+    "new_code": {
+      "description": "Modified .kcad.ts source (present on success). Caller persists it.",
+      "type": "string"
+    },
+    "ok": {
+      "description": "Whether the edit applied and re-evaluated cleanly.",
+      "type": "boolean"
+    }
+  },
+  "required": [
+    "ok"
+  ],
+  "type": "object"
+}

Changed1 schema field changedJun 7, 2026

changedInput schema / properties / sections / description

Previous value: -"Varying cross-sections along the spine; at least 2 entries, strictly increasing in `t`."New value: +"Varying cross-sections along the spine; at least 2 entries, strictly increasing in `t`, first t=0, last t=1."

First observedMay 25, 2026

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