when

@whenlabs/when

Six tools. One install.

A single installable toolkit that brings six WhenLabs developer tools into your Claude Code workflow. After install, the tools are exposed over a single MCP server and Claude calls them automatically when relevant.

<p align="center"> <img src="demos/hero.gif" alt="when doctor — six tools, one unified health report" width="820" /> </p>

Install

npx @whenlabs/when install

One-time setup. The installer:

1. Registers a single MCP server (whenlabs) in your Claude Code configuration
2. Injects a CLAUDE.md block so Claude knows when to use each tool
3. Cleans up any legacy velocity-mcp registration (velocity is now bundled)

The six tools

| Tool | Purpose | |---|---| | aware | Auto-detect stack and generate AI context files (CLAUDE.md, .cursorrules, …) | | berth | Detect port conflicts before starting dev servers | | envalid | Validate .env files against a schema | | stale | Detect documentation drift between docs and code | | vow | Scan dependency licenses and validate against policy | | velocity | Time coding tasks and learn from historical data |

MCP tools

Eight endpoints across the six tools:

| Endpoint | What it does | |---|---| | aware_sync | Detect stack and regenerate AI context files | | berth_check | Scan project for port conflicts | | envalid_validate | Validate .env files against schema | | stale_scan | Detect documentation drift | | vow_scan | Scan licenses and validate against policy | | velocity_start_task | Start timing a coding task | | velocity_end_task | End timing and record results | | whenlabs_summary | Unified rollup across all five scanners in one call |

All eight are served by the single whenlabs MCP server (stdio, Node 20+). Fix/init/auxiliary commands remain available via each tool's CLI (npx @whenlabs/<tool> --help).

CLI

when init       # Onboard a project — detect stack, bootstrap configs, run all checks
when doctor     # Run all six tools and show a unified health report
when install    # Register MCP server in Claude Code
when uninstall  # Remove MCP server

For per-tool operations, use the tool directly:

npx @whenlabs/stale scan
npx @whenlabs/envalid validate
npx @whenlabs/berth check
npx @whenlabs/aware sync
npx @whenlabs/vow scan

Manual MCP configuration

If you're not using the install command, add this to your Claude Code MCP config:

{
  "mcpServers": {
    "whenlabs": {
      "command": "npx",
      "args": ["@whenlabs/when", "when-mcp"]
    }
  }
}

License

MIT — see LICENSE

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Built by Siddharth at WhenLabs