Hcom Agent Messaging

This connects AI coding agents running in separate terminals so they can message each other, watch file edits, and spawn new agents in real time. You'd use it when you want Claude in one terminal to hand off context to Gemini in another, or have a reviewer agent automatically check another agent's work and send feedback. The hook system is automatic for Claude, Gemini, Codex, and others. Setup is straightforward but watch out for the gotchas around threading and cleanup, especially if you're writing multi-agent scripts. The reference patterns are actually helpful. It's solving a real coordination problem if you're running multiple agents, though you'll spend some time learning the event system and intent flags.

GitHub stars: 337
last updated: Jun 10, 2026

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Install

$ npx -y skills add aannoo/hcom --skill hcom-agent-messaging --agent claude-code

Installs into .claude/skills of the current project.

Files

hcom — multi-agent communication for AI coding tools

AI agents running in separate terminals are isolated. hcom connects them via hooks and a shared database so they can message, watch, and spawn each other in real-time.

Start an agent with hcom in front, then prompt normally.

Use hcom to:

coordinate multi-agent pipelines
run different AI CLIs as each other's subagents
avoid copy-pasting

uv tool install hcom
hcom claude       # or: hcom gemini, hcom codex, hcom opencode, hcom kilo, hcom pi, hcom omp, hcom agy, hcom cursor, hcom kimi, hcom copilot, hcom qoder, hcom grok, hcom hermes
hcom              # TUI dashboard

Quickstart:

# terminal 1
hcom claude

# terminal 2
hcom codex

Prompt normally — e.g. review what claude did and send it fixes

what humans can do

tell any agent:

send a message to claude

when codex goes idle send it the next task

watch gemini's file edits, review each and send feedback if any bugs

fork yourself to investigate the bug and report back

find which agent worked on terminal_id code, resume them and ask why it sucks

what agents can do

SKILL.md on GitHub

Details

Repository: github.com/aannoo/hcom
Category: AI & Agent Building
License: MIT
First seen: Jun 11, 2026