Project Detection Skill

Project Detection

Detects project configuration and provides standardized commands. Run once at init, cache in state file.

Usage

Run the detection script from the project root:

./marathon-ralph/skills/project-detection/scripts/detect.sh /path/to/project

Returns JSON:

{
  "language": "node",
  "packageManager": "bun",
  "monorepo": {
    "type": "turbo",
    "workspaces": ["apps/web", "apps/api", "packages/shared"]
  },
  "commands": {
    "install": "bun install",
    "dev": "bun run dev",
    "build": "bun run build",
    "test": "bun run test",
    "testWorkspace": "bun run --filter={workspace} test",
    "lint": "bun run lint",
    "typecheck": "bun run check-types"
  }
}

Caching Results

After detection, store in marathon state file under project key:

{
  "project": {
    "language": "node",
    "packageManager": "bun",
    "monorepo": { "type": "turbo", "workspaces": [...] },
    "commands": { ... },
    "detectedAt": "2024-01-03T12:00:00Z"
  }
}

Using Cached Commands

When running commands, always check state first:

Read project.commands from state
If not present, run detection script
Use the appropriate command from the cache

For Monorepos

When tests/builds need to target a specific workspace:

# Use testWorkspace with the workspace name
bun run --filter=web test

# Or for all workspaces
turbo run test

Command Selection Priority

Use cached command from state
If no cache, run detection
If detection fails, fall back to reference patterns

Detection Logic

Package Manager Detection (by lock file)

| Lock File | Package Manager | Install | Run | |--------------------------------|-----------------|-----------------------|------------| | bun.lock or bun.lockb | bun | bun install | bun run | | pnpm-lock.yaml | pnpm | pnpm install | pnpm run | | yarn.lock | yarn | yarn install | yarn | | package-lock.json | npm | npm install | npm run |

Monorepo Detection

| Config File | Monorepo Type | |------------------------------------|-----------------------| | turbo.json | Turborepo | | nx.json | Nx | | lerna.json | Lerna | | pnpm-workspace.yaml | pnpm workspaces | | package.json with workspaces | npm/yarn workspaces |

Language Detection

| Indicator | Language | |---------------------------------------|----------| | package.json | Node.js | | pyproject.toml, setup.py | Python | | go.mod | Go | | Cargo.toml | Rust | | build.gradle, pom.xml | Java |

Python Project Commands

For Python projects:

| Tool | Install | Run Script | Test | |-------------|-------------------------------------------|-------------------------|-----------------------| | poetry | poetry install | poetry run {script} | poetry run pytest | | poetry+poe | poetry install | poe {task} | poe test | | pip + venv | pip install -r requirements.txt | python -m {module} | pytest | | uv | uv pip install -r requirements.txt | uv run {script} | uv run pytest | | pipenv | pipenv install | pipenv run {script} | pipenv run pytest |

Note: If [tool.poe.tasks] exists in pyproject.toml, poe commands are preferred.

Reference Files

node.md - Node.js patterns and commands
python.md - Python patterns and commands
monorepo.md - Monorepo-specific patterns

Agent Skills: Project Detection

Skill Files