ForgeCAD Public Kit

Public examples, agent skills, docs links, and issue tracking for ForgeCAD.

ForgeCAD is code-first parametric CAD for JavaScript/TypeScript: a normal .forge.js file becomes a live model with parameters, assemblies, validation, renders, inspections, and exports.

This repository is the public companion kit. It is intentionally focused on assets people can use directly: example models, installable agent skills, public issues, docs links, and historical benchmark artifacts.

TypeScript is the file format. The browser is the CAD system.

Try ForgeCAD • Docs • Examples • Agent skills • Open an issue

Start Here

If you want to...	Go here
Use the CAD app	forgecad.io
Learn the API	Docs
Run example models	examples/
Install agent workflows	skills/
Report a bug or request an API	Issues
Check commercial terms	Pricing

Repository Scope

This public kit contains	The hosted product contains
Ready-to-run .forge.js examples	Browser workbench and project storage
Agent skills and workflow prompts	Core app source and infrastructure
Public bug reports and feature requests	Account, billing, and usage systems
Historical benchmark artifacts	Product roadmap execution and customer projects

The npm package, CLI, hosted app, and backend/application usage are governed by ForgeCAD's product terms. This public kit itself is MIT licensed.

Get Started

Install the CLI:

npm install -g forgecad

Start from the hosted starter project:

forgecad login
forgecad project clone start-here
cd start-here
forgecad studio .

forgecad login guides you through email/password or API-token sign-in. Choose API token for GitHub/Google accounts.

A ForgeCAD project is a dedicated local folder linked to the hosted app by forgecad.json. Use forgecad project clone <slug> to download an existing project, or run forgecad project init inside a folder you want to make into a new ForgeCAD project.

Create a new project locally:

mkdir spool-adapter
cd spool-adapter
forgecad project init "Spool Adapter" --visibility private
forgecad new adapter --template part
forgecad studio .

Do not point forgecad studio at your home directory, downloads folder, desktop, or a huge source tree. It requires an explicit project path; use . for the current project folder.

Explore the public examples locally:

git clone https://github.com/KoStard/forgecad-public-kit.git
cd forgecad-public-kit
forgecad studio examples
forgecad run examples/products/cup.forge.js
forgecad render 3d examples/products/cup.forge.js

Open more than one local project at once:

forgecad studio examples path/to/another-project

Keep one long-running forgecad studio <project-path> [project-path ...] process open with every active project folder listed in its arguments; the user opens the single printed localhost port once, and AI agents should only create or edit files under those folders so the browser updates live without starting more servers.

First Script

Inside a cloned or initialized ForgeCAD project, drop this into starter.forge.js:

const width = Param.number("Width", 90, { min: 50, max: 160, unit: "mm" });
const depth = Param.number("Depth", 56, { min: 32, max: 100, unit: "mm" });
const height = Param.number("Height", 12, { min: 6, max: 32, unit: "mm" });
const holeRadius = Param.number("Hole Radius", 5, { min: 2, max: 10, unit: "mm" });

const base = box(width, depth, height).color("#5f87c6");
const hole = cylinder(height * 3, holeRadius).translate(0, 0, -height);

return {
  "starter plate": base.subtract(hole),
};

Then run:

forgecad run starter.forge.js
forgecad studio .

Repository Contents

This repository is ForgeCAD's public companion kit for:

• Issues and discussion — bugs, feature requests, questions, and public roadmap input.
• Examples — ready-to-run .forge.js scripts under examples/.
• Agent skills — the generated ForgeCAD modeling skill plus companion workflows under skills/.
• Benchmarks — examples of how current language models handle code-first CAD prompts.
• Docs links — full user documentation lives at forgecad.io/docs.

If there is a component you want opened up sooner, file an issue.

Examples To Try

Area	Start here
API basics	examples/api/boolean-operations.forge.js, examples/api/constrained-sketch-basics.forge.js
Assemblies	examples/api/static-assembly-connectors.forge.js, examples/mechanical/5-finger-robot-hand.forge.js
Exact and surface workflows	examples/api/exact-surface-studio.forge.js, examples/exact-arc-housing.forge.js
Generative forms	examples/generative/voronoi-lampshade.forge.js, examples/api/sdf-shapes.forge.js
Products	examples/products/chess-set.forge.js, examples/products/classical-piano.forge.js
Solver cases	examples/constraints/, examples/compiler-corpus/

CLI Workflows

Task	Command
Clone a hosted project	forgecad project clone <slug>
Create a new hosted project from the current folder	forgecad project init "Project Name"
Open one or more local projects	forgecad studio <project-path> [project-path ...]
Validate a script	forgecad run file.forge.js
Render a PNG	forgecad render 3d file.forge.js
Inspect a model	forgecad inspect collisions file.forge.js
Render a section	forgecad render section file.forge.js --plane XZ
Export STL	forgecad export stl file.forge.js
Export STEP	forgecad export step file.forge.js
Sweep parameters	forgecad check params file.forge.js --samples 10

forgecad project init creates the remote project, writes forgecad.json, and uploads local source files. forgecad project push syncs an already initialized project; it does not create a remote project from a random folder.

Run forgecad doctor if render or exact export dependencies need checking.

AI And Agent Workflows

ForgeCAD is built to work well with coding agents because CAD models are just code. The strongest loop is:

agent edits .forge.js -> forgecad run -> forgecad inspect <evidence> -> iterate

The full setup, approved model list, installed skills, flattened skill files, and completion criteria are in the AI Usage guide.

Install the ForgeCAD public skill library:

forgecad skill install

That installs the core forgecad skill plus public workflow skills such as forgecad-build-model, forgecad-design-spec, and forgecad-inspect-model into ~/.agents/skills. Use --target when you want to update a different agent location:

forgecad skill install --target claude    # ~/.claude/skills
forgecad skill install --target codex     # ~/.codex/skills
forgecad skill install --target opencode  # ~/.config/opencode/skills

The library includes public prompts for:

• design briefs, HLDs, and LLDs with forgecad-design-spec
• model authoring and assembly discipline with forgecad-build-model
• reconstruction from CAD or mesh files with forgecad-reconstruct-cad-file
• reconstruction from images with forgecad-reconstruct-from-images
• inspection-bundle verification with forgecad-inspect-model
• model grading with forgecad-grade-model
• MuJoCo simulation verification with forgecad-verify-mujoco
• hosted project sync with forgecad-project-sync
• AI image prompt generation with forgecad-image-prompt

The generated core modeling skill is checked in at skills/forgecad/SKILL.md. The full public skill index is skills/README.md.

Start the agent inside the initialized project folder and require command evidence:

Use the ForgeCAD skills. Work in this project folder. Build real ForgeCAD
geometry, validate with forgecad run, render or inspect the result, run
parameter checks when relevant, and push with forgecad project push when done.

For chat tools without local shell access, generate a single context file:

forgecad skill one-file ~/Desktop/forgecad-context.md

LLM Benchmarks

Historical benchmark archive only. These rows are not recommendations and are not the approved model list. For current supported AI workflows, use the approved models in the AI Usage guide.

Latest benchmark iterations from ForgeCADBenchmark/results/* (version_{n}.forge.js with highest n per run folder).

model name	prompt	GIF
3dprinter-gpt52codex2026-02-13 14-36-06 • v2	Make a detailed home 3D printer, showing the internal details of how it should work. Add some params for controlling positions, etc.
amazon-nova-2-lite-v12026-02-13 00-15-44 • v1	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
amazon-nova-premier-v12026-02-13 00-36-50 • v1	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.	GIF generation failed (script runtime error).
aurora_alpha2026-02-12 15-19-30 • v2	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.	GIF generation failed (script runtime error).
bytedance-seed-seed-1.62026-02-13 00-14-02 • v3	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
deepseek-deepseek-v3.22026-02-13 00-30-04 • v3	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
gemini3flash2026-02-12 23-53-27 • v5	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
glm52026-02-12 14-58-52 • v3	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
glm52026-02-12 23-04-12 • v4	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
google-gemini-3-pro-preview2026-02-13 00-36-12 • v2	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
gpt52codex2026-02-13 00-04-30 • v2	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
gpt52codex2026-02-13 12-40-31 • v2	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Include as many details as you safely can. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
haiku_4_52026-02-12 21-49-51 • v1	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
haiku_4_52026-02-12 21-54-22 • v3	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
kimi252026-02-12 13-50-22 • v4	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
kimi252026-02-12 14-58-53 • v3	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
manual-gemini-flash2026-02-12 23-44-23 • v3	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
minimax252026-02-12 14-32-24 • v5	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
minimax252026-02-12 23-05-17 • v3	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
minimax252026-02-13 12-37-52 • v4	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
openai-gpt-oss-120b2026-02-13 00-38-15 • v1	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
opus_4_62026-02-13 11-47-54 • v5	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
prime-intellect-intellect-32026-02-13 00-31-28 • v1	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
qwen3.5-397b-a17b2026-02-16 14-29-22 • v3	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
qwen3maxthinking2026-02-12 23-16-41 • v2	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
robot-hand-gpt52codex2026-02-14 00-51-41 • v1	Make a fully functional robot hand. Should be easy to build, maybe even at home with some good tools. Show all the mechanics. Should be able to hold arbitrary shape objects. Don't be a perfectionist, but be an artist and an engineer. As this is a complex task, break it down to simpler ones, solve them, combine, iterate.
sonnet_4_52026-02-12 21-58-26 • v3	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.
x-ai-grok-4.1-fast2026-02-13 00-26-36 • v2	Make a home AC unit, showing both pieces on different sides of the wall (inside and outside). The external piece should have a fan positioned on its external face vertically. Implement whatever features/methods you are missing in the script itself for your convenience. Use the simpler primitives when unsure.

Capability Snapshot

• Browser CAD workbench with Monaco editing, live parameters, and a real-time 3D viewport.
• Code-first modeling API for primitives, sketches, booleans, transforms, offsets, constraints, patterns, and SDF/level-set workflows.
• Named shapes, face/edge references, fillet/chamfer helpers, geometry inspection, dimensions, BOMs, and report-oriented annotations.
• Assembly modeling with parts, connectors, joints, coupled motion, and collision/clearance checks.
• CLI validation, parameter sweeps, viewport renders, inspection bundles, mesh export, exact export workflows, and project sync.
• Agent context that can be installed locally or inspected directly from this repository.

Documentation

Full documentation is available at forgecad.io/docs. Useful starting points:

• Welcome guide
• API reference
• CLI reference
• Public examples
• Agent skills

License

This public kit is available under the MIT License. The ForgeCAD npm package, CLI, hosted app, and commercial/backend usage are covered separately by ForgeCAD's product terms and pricing at forgecad.io/pricing.