Pascal Editor

An open-source, local-first 3D building editor built with React Three Fiber and WebGPU. Run it in the browser or from the CLI, and connect AI agents through MCP.

https://github.com/user-attachments/assets/8b50e7cf-cebe-4579-9cf3-8786b35f7b6b

Run the Editor Locally

Node.js 22.13 or newer can create a persistent local Pascal installation without cloning this repository:

npx @pascal-app/cli editor

The CLI starts the editor and an authenticated MCP service in the background, selects collision-free loopback ports, and keeps projects in ~/.pascal/data/pascal.db. The npm package holds the CLI and that MCP service; the web editor runtime is downloaded once per version on the first command that starts the editor and verified against a digest published inside the package. Configure an agent to launch pascal mcp connect, which needs neither the editor process nor that download. Install the pascal command with npm install --global @pascal-app/cli. See Run Pascal locally for pnpm/Bun commands, project management, MCP setup, updates, storage paths, and troubleshooting.

Use one active agent client per local CLI service. The standalone local HTTP runtime shares active scene state between clients; use separate PASCAL_HOME directories and service processes when independent concurrent work is required.

Agent skills

Install Pascal's public agent workflows from this repository with skills.sh:

npx skills add pascalorg/editor \
  --skill pascal-3d \
  --skill furniture-fit

Claude Code users can install the same canonical skill source as a plugin:

/plugin marketplace add pascalorg/editor
/plugin install pascal-agent-skills@pascal

The Claude plugin also supplies the local pascal mcp connect server. Install and start the Pascal CLI first, and keep pascal on the PATH used to launch Claude Code. This local connector needs no Pascal account or API key and does not upload projects automatically. Its plugin root is this repository's skills/ directory, so an install copies only the skill bundles and their plugin metadata rather than the repository.

The plugin bundles two servers: the local pascal connector above and a hosted pascal-hosted server for https://editor.pascal.app/api/mcp, which prompts for an optional Pascal API key at enable time and stores it in the OS keychain. Leave the key empty to run local-only.

Claude Code 2.1.258 loads both the user-scoped pascal server created by pascal mcp setup claude and the plugin-provided server. Remove the manual entry before reloading or restarting Claude Code so only the plugin owns the connection lifecycle:

claude mcp remove --scope user pascal

Use /mcp to remove or disable any project- or local-scoped Pascal connection too. Leaving both connections active violates the one-active-agent-client-per-local-service requirement. When the intended project is hosted in a Pascal account or organization, disable the plugin-provided local server in /mcp and configure the hosted endpoint from the skill setup guide instead.

Codex users can install the same plugin from the repository marketplace:

codex plugin marketplace add pascalorg/editor
codex plugin add pascal-agent-skills@pascal

OpenClaw installation becomes available after the skills are published under Pascal's ClawHub publisher. See skills/README.md for the owner-qualified install and verification commands.

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