pigeonhole
v0.5.0by Baukebrenninkmeijer · author: Bauke Brenninkmeijer
A wall of mail slots for parallel coding agents. Each worktree gets a pigeonhole; agents leave each other notes and post what they are working on. No server, no daemon, no MCP.
What pigeonhole does, in the publisher's words
If you run several agents at once, one per git worktree, they can't see each other. Two of them refactor the same shared module, and you find out at rebase. pigeonhole gives each worktree a mail slot: agents post what they're working on, and leave each other notes when something they changed will break someone else.
There is no server, no daemon and no MCP. It is one POSIX shell script and the filesystem.
From the project README, punctuation lightly normalized · Open the README on GitHub
- Skills
- 1
- MCP servers
- 0
- Stars
- 4
- License
- MIT
- Repo created
- 2026-08-15
- Last pushed
- 2026-09-06
- Publisher type
- User
- Version
- 0.5.0
Links
Skills · 1
- pigeonhole
- File-based mailbox and status board so parallel coding agents can align without a server, across every repo and worktree on the machine. Use when the user says "check my mail", "message the other agent", "tell the frontend agent X", "who else is working here". Also use when the session-start notice…
Descriptions come from the frontmatter of each SKILL.md, punctuation lightly normalized.
Category
Agent Tooling. Assigned by this directory. Agent Plugins 1.0.0 has no category field, so no manifest declares one.
Keywords
agents · coordination · worktree · messaging · parallel
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[](https://agentpluginsdirectory.com/plugins/pigeonhole)✓ Verified . We fetched the manifest from GitHub and checked it against the official Agent Plugins 1.0.0 schema at agent-plugins.org.