Handoffgen MCP Server

handoffgen

An agent that stops mid-task leaves a trail scattered across three places: the commits it just landed, the pull requests still waiting on review, and the TODOs noted along the way. The next agent picking the work up has to reconstruct that trail before it can safely continue. handoffgen turns the pieces you hand it into one cold-start brief: a short markdown document a fresh agent can read top to bottom and then start correctly, without re-deriving state from scratch.

You supply the facts. Recent commits are rendered in input order, each hash in backticks next to its subject. Open pull requests follow in input order too, and any pull request flagged as blocked carries a visible [blocked] marker so nobody wastes a turn rediscovering the stall. TODOs are banded by priority — every high-priority item first, then normal, then low, with the order you gave preserved inside each band — high items are prefixed [high], and an item that names where it lives (a file path, say) gets that source in parentheses after its text. If you add a free-text context note, it opens the brief verbatim, exactly as you wrote it; a note that is empty or only whitespace counts as no note at all, and the same rule decides whether a TODO's source appears.

Empty inputs stay honest instead of vanishing. A brief built with no commits says "No commits supplied." under its heading; no pull requests and no TODOs get their own matching lines. Alongside the markdown, the result carries the counts behind it: commits, open pull requests, how many of those are blocked, TODOs, and how many TODOs are high priority. Nothing is fetched, executed, or inferred — no repository is read, no hosting service is queried, and no state is guessed at. The brief is exactly the facts you supplied, arranged for a cold reader.

Malformed input — a missing or non-array commits, open_prs, or todos, an item that is not an object, an empty or non-string hash, subject, title, or TODO text, a pull request number that is not an integer of at least 1, a non-boolean blocked, a non-string source or context, or a priority outside "high", "normal", and "low" — is a validation error naming the offending path, with no partial result. Unknown extra fields are ignored, including inside items. An absent priority counts as "normal", and an absent blocked counts as false.

CLI

npx @reneturcios/handoffgen build --input args.json
npx @reneturcios/handoffgen --version

args.json contains the full arguments object:

{
  "context": "Parser is stable; cache work is mid-flight.",
  "commits": [
    { "hash": "abc1234", "subject": "Add parser" },
    { "hash": "def5678", "subject": "Fix flaky test" }
  ],
  "open_prs": [
    { "number": 12, "title": "Wire up cache" },
    { "number": 13, "title": "Bump deps", "blocked": true }
  ],
  "todos": [
    {
      "text": "Write migration notes",
      "source": "docs/migration.md",
      "priority": "high"
    },
    { "text": "Tidy README" },
    { "text": "Polish icons", "priority": "low" }
  ]
}

The result is printed as JSON:

{
  "brief": "# Handoff brief\n\n## Context\nParser is stable; cache work is mid-flight.\n\n## Recent commits\n- `abc1234` Add parser\n- `def5678` Fix flaky test\n\n## Open pull requests\n- #12 Wire up cache\n- #13 Bump deps [blocked]\n\n## TODOs\n- [high] Write migration notes (docs/migration.md)\n- Tidy README\n- Polish icons",
  "counts": {
    "commits": 2,
    "open_prs": 2,
    "blocked_prs": 1,
    "todos": 3,
    "high_priority_todos": 1
  }
}

Exit codes: 0 on success, 1 on a runtime error (including an unreadable or invalid input file, or invalid input), 2 on a usage error.

MCP server

npx -y @reneturcios/handoffgen mcp

MCP client config:

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

Tools

• build_handoff_brief — Build a cold-start handoff brief for the next agent from caller-supplied commits, open pull requests, and TODO items.

  • commits (array, required, may be empty) — recent commits in input order; each item is {hash, subject} with both strings non-empty
  • open_prs (array, required, may be empty) — open pull requests in input order; each item is {number, title, blocked?} with number an integer of at least 1, title non-empty, and blocked a boolean when present
  • todos (array, required, may be empty) — outstanding TODO items; each item is {text, source?, priority?} with text non-empty, source a string when present, and priority one of "high", "normal", "low" when present (absent means "normal")
  • context (string, optional) — free-text current-state note, included verbatim when it counts as supplied

  Returns {brief, counts}, where counts is {commits, open_prs, blocked_prs, todos, high_priority_todos}.

Docker

docker run -i ghcr.io/cloudcorprecords/handoffgen
docker run --rm -v "$PWD:/w" ghcr.io/cloudcorprecords/handoffgen build --input /w/args.json

Development

npm install
npm run build   # tsc -> dist/
npm test        # tsx --test test/*.test.ts (pure local, no network)
npm run dev     # run the CLI from source

License

MIT — Copyright (c) 2026 Rene Turcios