mulchd

Stop re-explaining your stack to every new Claude session — mulchd gives Claude a memory your whole team shares.

mulchd is a self-hosted MCP server that stores and serves structured team knowledge. Engineers record decisions, conventions, and patterns once; every AI session loads exactly what's relevant, attributed to whoever wrote it, without re-prompting.

How it works

mulchd builds on mulch, a CLI that manages structured knowledge as JSONL records on disk, and wraps it with an HTTP server exposing MCP tools (write_decision, search_records, get_recent, and more — see docs/mcp-tools.md) over Streamable HTTP and legacy SSE.

Knowledge is organized into domains (e.g. architecture, conventions, ops). Records carry attribution, classification (foundational / tactical / observational), and optional supersession links so the team can track how thinking evolves.

An admin UI at /admin covers user and project management, invite links for self-service onboarding, admin access management and an instance-wide activity log, a live record browser, and a full per-project record audit log with soft-delete and restore. A self-service /connect portal lets team members mint their own project-scoped tokens without admin involvement.

Related MCP server: mnemory

Try it locally

The demo script seeds a database with sample users, records, and tool-call history, then starts the server:

git clone https://github.com/ChacheGS/mulchd
cd mulchd
uv sync
./scripts/demo.sh

The seed script grants alice admin access directly. Open http://localhost:8000/connect, log in with alice's printed token, then visit http://localhost:8000/admin. The demo creates three users (alice, bob, claude) and a backend-api project with records across four domains.

To connect a client to the demo server, use the project tokens printed by the seed script and point it at http://localhost:8000/mcp.

Production setup

See docs/deployment.md for the full walkthrough: environment configuration, deploying with Docker Compose, bootstrapping the first admin, creating users, and enabling SSO.

Connecting a client

mulchd works with any MCP-compatible client. The /connect portal generates ready-to-paste config snippets for Claude Code and Claude Desktop — see docs/mcp-tools.md for the tool list and example client config.

Development

uv sync
make dev          # start mulchd + postgres with live reload
make test         # run the test suite
make dev-inspector  # start the MCP Inspector on :6274 alongside mulchd

make dev-inspector is useful for inspecting the MCP protocol directly — subscribe to resources, call tools, and observe notifications without a full AI client.

Roadmap

• Automated alerting — webhook or email notifications when structural audit events fire (cross-owner edits, foundational-record supersessions)

• Live notifications — server-side resource subscriptions are implemented and spec-compliant; waiting on client support (resources/subscribe is not yet implemented in Claude Code or Codex)

• Claude Desktop snippets — /connect already generates them; document the flow end-to-end

Contributing

Issues and pull requests are welcome. For non-trivial changes, open an issue first to discuss the approach — especially anything touching the MCP tool interface or the audit trail, where backward compatibility and security posture matter. Run make format and make test before submitting.

Acknowledgements

mulchd builds on mulch by Jaymin West, which provides the JSONL knowledge store, BM25 search, and the ml CLI that mulchd shells out to for all record operations. mulch is MIT licensed.