Cmpose

cmpose

Generate Compose Multiplatform projects on your own machine — from any AI agent, through MCP.

Ask your agent for an app ("a blank Compose Multiplatform app called Habits with Room and theming") and get a buildable Android + iOS project from a tested template: Koin, Navigation, Ktor, Room, DataStore, theming, multi-language, RevenueCat purchases, AdMob ads, detekt, backend (Ktor server, Firebase sign-in, sharing; blank only; turns on multi-language and networking) and CI as options. What each option adds: packages/mcp/README.md.

It also generates Unity mobile games ("a 2D Unity game called SkyHopper with ads and leaderboards"): a Unity 6 (URP) Android + iOS project from the pinned game template (whinstudio/cmpose-game-template), as a showcase sample game (2D runner or 3D track) or a blank game with flags for saving, theming, multi-language, networking, RevenueCat purchases, AdMob ads and Play Games / Game Center leaderboards, up to 3 feature modules and your real IDs.

And it generates a standalone Kotlin/Ktor backend ("a backend called NotesBackend with sharing"): Firebase sign-in verified on the server, PostgreSQL with Flyway, file uploads, a sample feature to copy and the parts to deploy it as one Docker container, from the pinned backend template (whinstudio/cmpose-backend-template), with an optional sharing part (spaces, roles and invitations).

• @cmpose/core — the generator library.
• @cmpose/mcp — a local stdio MCP server with six tools: cmp_describe, cmp_generate, game_describe, game_generate, backend_describe and backend_generate.

Requires Node.js 20+ and git. The first generation downloads the pinned template (whinstudio/cmpose-template) into ~/.cache/cmpose (override: CMPOSE_CACHE_DIR).

Developer guide (architecture, modules, backend, release): https://whinstudio.github.io/cmpose/guide.html

Use with Claude Code

claude mcp add -s user cmpose -- npx -y @cmpose/mcp

-s user makes the server available in every directory; without it, it is added only for the directory you run the command in.

Optional skills for Claude Code live in whinstudio/skills: cmp-new-project generates a project through this server asking only four questions, and cmp-feature, cmp-code-rules, cmp-testing and others help when working in a generated project. Install one into ~/.claude/skills/:

git clone https://github.com/whinstudio/skills.git
ln -s "$PWD/skills/cmp-new-project" ~/.claude/skills/cmp-new-project

Use with other MCP clients

Add the server to the client's mcpServers configuration:

{
  "mcpServers": {
    "cmpose": {
      "command": "npx",
      "args": ["-y", "@cmpose/mcp"]
    }
  }
}

cmp_generate takes projectName, appName, packageName and an absolute outputDir (required), plus optional templateType (showcase | blank), features, featuresConfig (blank only), minSdk, iosVersion, ci, templateRef and backendTemplateRef (the backend template tag that server/ comes from; blank with the backend only); cmp_describe lists the defaults and rules. game_generate takes the same required fields plus optional companyName, templateType, render (2d | 3d), flags and features (blank only), minSdk, iosVersion, ids, theme and templateRef; game_describe lists the flags, ID groups, limits and the template's theme families. backend_generate takes the same required fields (appName is the service name, e.g. notes-api) plus optional sharing, sample (the sample items feature, default on) and templateRef; backend_describe lists the rules and the conventions an agent follows when it adds code to the generated backend.

Develop

npm install
npm test
npm run scan    # public hygiene scan: private paths, names, addresses, secrets

The 5 real-template tests in packages/core/test/fileService.importSort.test.js run only when CMP_REAL_TEMPLATE_DIR points to a checkout of the template, e.g. CMP_REAL_TEMPLATE_DIR=/path/to/template-checkout npm test; otherwise they are skipped.

CMPOSE_BACKEND_TEMPLATE_DIR points to a checkout of the backend template (an absolute path). The MCP server then generates from that checkout instead of the pinned tag: backend_generate and the server/ of a cmp_generate blank project with the backend. Only git's tracked files are copied, and the result warns that it is not a released tag. The real backend-template tests in packages/core/test/backend-generate.real.test.js (and, together with CMP_REAL_TEMPLATE_DIR, in generate.backend.real.test.js) run only when it is set, e.g. CMP_REAL_TEMPLATE_DIR=/path/to/template-checkout CMPOSE_BACKEND_TEMPLATE_DIR=/path/to/backend-template-checkout npm test.