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AI CAD — say it, shape it. chisel.theradicalparty.com
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maverick ba565ee1a1 v1: sliders fix, progress UX, vision verify, persistence, STEP scaffold 
- Fix param sliders: Viewer now fits camera once per design (fitKey), not on
  every param change — size changes are visible again. Better slider ranges.
- Progress UX: full-stage overlay with spinning cube + pipeline stepper,
  animated thinking dots in chat, send-button spinner, staged status.
- B (vision verify): capture canvas → /api/verify (Claude vision) → auto-refine
  one pass on mismatch. Fail-open so a flaky judge never blocks.
- C (persistence): D1 designs table + anonymous cookie identity, save/load/list,
  designs drawer, autosave, shareable ids. no-store on all /api responses.
- D (STEP scaffold): /api/step + build123d prompt + service client (step.ts),
  Download STEP button. Needs STEP_SERVICE_URL to go live.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-25 00:37:35 +10:00
migrations v1: sliders fix, progress UX, vision verify, persistence, STEP scaffold 2026-07-25 00:37:35 +10:00
src v1: sliders fix, progress UX, vision verify, persistence, STEP scaffold 2026-07-25 00:37:35 +10:00
.gitignore Chisel v0 — AI CAD single-shot generator 2026-07-25 00:03:38 +10:00
package-lock.json Chisel v0 — AI CAD single-shot generator 2026-07-25 00:03:38 +10:00
package.json Chisel v0 — AI CAD single-shot generator 2026-07-25 00:03:38 +10:00
README.md Chisel v0 — AI CAD single-shot generator 2026-07-25 00:03:38 +10:00
tsconfig.json Chisel v0 — AI CAD single-shot generator 2026-07-25 00:03:38 +10:00
vite.config.ts Chisel v0 — AI CAD single-shot generator 2026-07-25 00:03:38 +10:00
wrangler.jsonc v1: sliders fix, progress UX, vision verify, persistence, STEP scaffold 2026-07-25 00:37:35 +10:00

README.md

◢ Chisel — AI CAD

Say it. Shape it. Message what you want built; Claude writes a parametric CAD script, it runs in a sandbox, and it appears in a live 3D viewport — exportable to real CAD.

The core idea: the design is a parametric script. Chat edits patch the script; sliders tune its parameters; export emits the geometry. Everything — editing, versioning, parametrics — falls out of that one choice.

Architecture (v0 — MVP)

React + react-three-fiber (chat + 3D viewport)
        │  POST /api/generate | /api/repair
        ▼
Hono Worker ── Claude (claude-sonnet-4-6, prompt-cached system prompt)
        │
        ▼  returns a JSCAD script
Sandboxed Web Worker (src/client/engine) ── runs script → binary STL
        ▼
three.js viewport  +  Download STL
  • Kernel: JSCAD (@jscad/modeling), pure JS — runs client-side in a Web Worker isolated from the DOM. Exports STL now.
  • Agent loop: generate → execute → on error, /api/repair (up to 3×) before the user sees anything.
  • Parameters: // @param name default // label comments in the script become live sliders that re-run locally with no API call.

Develop

npm install
wrangler secret put ANTHROPIC_API_KEY   # or add to .dev.vars for local dev
# terminal 1 — Worker API on :8787
npm run dev
# terminal 2 — Vite client on :5173 (proxies /api → :8787)
npm run dev:client

Open http://localhost:5173.

Deploy

npm run deploy        # builds client → ./public, then wrangler deploy

Serves at chisel.theradicalparty.com.

Roadmap

  • v1 — conversational edits as source-of-truth, vision verification (render → "does this match?"), auth + saved projects (D1/R2), 3MF/OBJ export.
  • v2 — STEP B-rep engine via build123d/OpenCascade in a Cloudflare Container/Sandbox, so exports reopen cleanly in Fusion/SolidWorks/FreeCAD. Version history & branching.
  • v3 — assemblies & mates, dimension queries ("how tall is it?"), manufacturing hints (3D print / CNC).

Layout

src/worker/     Hono API — Claude orchestration, prompts, repair
src/client/     React app, 3D viewer, JSCAD Web Worker engine