Agent skill

Hcom Agent Messaging

Multi-agent communication for AI coding tools. An agent skill from aannoo/hcom.

Install Hcom Agent Messaging

skills CLI

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

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install aannoo/hcom hcom-agent-messaging --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/aannoo/hcom.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/hcom-agent-messaging .claude/skills/hcom-agent-messaging && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "hcom-agent-messaging" agent skill from https://github.com/aannoo/hcom/tree/main/skills/hcom-agent-messaging into .claude/skills/hcom-agent-messaging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hcom-agent-messaging", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/aannoo/hcom/tree/main/skills/hcom-agent-messaging

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add aannoo/hcom --skill hcom-agent-messaging -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install aannoo/hcom hcom-agent-messaging --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/aannoo/hcom.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/hcom-agent-messaging .agents/skills/hcom-agent-messaging && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "hcom-agent-messaging" agent skill from https://github.com/aannoo/hcom/tree/main/skills/hcom-agent-messaging into .agents/skills/hcom-agent-messaging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hcom-agent-messaging", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add aannoo/hcom --skill hcom-agent-messaging -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install aannoo/hcom hcom-agent-messaging --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/aannoo/hcom.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/hcom-agent-messaging .cursor/skills/hcom-agent-messaging && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "hcom-agent-messaging" agent skill from https://github.com/aannoo/hcom/tree/main/skills/hcom-agent-messaging into .cursor/skills/hcom-agent-messaging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hcom-agent-messaging", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/aannoo/hcom.git --path skills/hcom-agent-messaging

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add aannoo/hcom --skill hcom-agent-messaging -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install aannoo/hcom hcom-agent-messaging --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/aannoo/hcom.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/hcom-agent-messaging .gemini/skills/hcom-agent-messaging && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "hcom-agent-messaging" agent skill from https://github.com/aannoo/hcom/tree/main/skills/hcom-agent-messaging into .gemini/skills/hcom-agent-messaging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hcom-agent-messaging", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install aannoo/hcom hcom-agent-messaging

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add aannoo/hcom --skill hcom-agent-messaging -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/aannoo/hcom.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/hcom-agent-messaging .github/skills/hcom-agent-messaging && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "hcom-agent-messaging" agent skill from https://github.com/aannoo/hcom/tree/main/skills/hcom-agent-messaging into .github/skills/hcom-agent-messaging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hcom-agent-messaging", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add aannoo/hcom --skill hcom-agent-messaging -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install aannoo/hcom hcom-agent-messaging --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/aannoo/hcom.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/hcom-agent-messaging .opencode/skills/hcom-agent-messaging && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "hcom-agent-messaging" agent skill from https://github.com/aannoo/hcom/tree/main/skills/hcom-agent-messaging into .opencode/skills/hcom-agent-messaging/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hcom-agent-messaging", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: hcom-agent-messaging
GitHub stars: 561
Token cost: ~957 tokens
SKILL.md length: 405 words
Files: 1
Skills in repo: 1
Repo updated: Oct 6, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Multi-agent communication for AI coding tools. An agent skill from aannoo/hcom.

Setting up hcom
SKILL.md covers what humans can do, what agents can do, setup and troubleshooting, plus 2 more sections
Calls uv and git
Troubleshooting

What it does

Hcom Agent Messaging is an agent skill from aannoo/hcom. Multi-agent communication for AI coding tools. Agents message, watch, and spawn each other across terminals. Use when setting up hcom or troubleshooting.

Its SKILL.md is about 960 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows, covering Multi-agent orchestration. The repository describes itself as: Let AI agents message, watch, and spawn each other across terminals. Claude Code, Codex, Antigravity CLI, Cursor CLI, OpenCode, Kilo, Pi, Kimi. The licence is MIT.

When your agent uses it

Setting up hcom
Troubleshooting

Example prompts

“/hcom-agent-messaging”

What it can do on your machine

Read from SKILL.md and the folder at commit b2a7c19. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- uv
- git
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- github.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Hcom Agent Messaging loads about 957 tokens when it runs. Until then it costs about 44 tokens; SKILL.md has 405 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~44
When it runs · the whole SKILL.md, loaded when a task matches: ~957

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from aannoo/hcom at commit b2a7c19, republished under its MIT licence (© aannoo). 405 words, ~957 tokens.

Download SKILL.mdSave it as .claude/skills/hcom-agent-messaging/SKILL.md (or your agent's skills folder).

name: hcom-agent-messaging
description: Multi-agent communication for AI coding tools. Agents message, watch, and spawn each other across terminals. Use when setting up hcom or troubleshooting.

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

bash

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              # TUI dashboard

Quickstart:

bash

# 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

Message each other in real time: mid-turn or wake immediately when idle

Observe each other: status, transcripts, file edits, live terminal screens, command history.

Subscribe and notify on status changes, file edits, collisions, specific events. React automatically.

Spawn, fork, resume, kill in any terminal emulator or headless.

run hcom --help for full command syntax and flags.

Works with Claude Code, Gemini CLI, Codex, OpenCode, Kilo Code, Pi, Oh My Pi, Antigravity, Cursor, Kimi, Copilot, Qoder CLI, Grok Build, and other tools

Show full SKILL.md (191 more words)Show less

setup

When this skill is invoked, first run:

bash

hcom status

If hcom status works: run hcom list

If hcom list shows "Your name: <name>" where <name> is not "(not participating)": congratulations!

If running hcom status returns "command not found", install first:

bash

uv tool install hcom

See the hcom README for other install options.

If hcom status shows a list of CLI tools and you are not any of them, run hcom start to connect to hcom.

If you've just installed hcom now or if hcom list shows "Your name: (not participating)" and you are a tool in the hcom status list of CLI tools:

Relaunch into hcom properly for automatic message delivery and full hcom functionality. User should exit and run hcom <tool>. Or if you know your sessionID/ses_/thread_name: user can exit and run hcom r <session-id> to resume you inside hcom. See hcom r --help.

troubleshooting

"hcom not working"

bash

hcom status          # check installation
hcom hooks status    # check hooks specifically
hcom relay status    # check cross-device relay

still broken?

bash

hcom reset all # backup config/db + reset it
hcom claude          # fresh start

still broken after that?

bash

git clone https://github.com/aannoo/hcom.git
cd hcom

Read code and figure out what is going on.

sandbox / permission issues

Use project-local hcom state when the normal hcom directory is unavailable:

bash

HCOM_DIR=$PWD/.hcom hcom <tool>

files

what	location
database	`~/.hcom/hcom.db`
config	`~/.hcom/config.toml`
env	`~/.hcom/env`
logs	`~/.hcom/.tmp/logs/`
user scripts	`~/.hcom/scripts/`

more info

bash

hcom --help
hcom <command> --help
hcom run docs --scripts   # script authoring info

Github: https://github.com/aannoo/hcom

Files

Just SKILL.md in skills/hcom-agent-messaging of aannoo/hcom.

Open the folder on GitHubat commit b2a7c19

Compare with similar skills

Hcom Agent Messaging next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Hcom Agent Messaging compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Hcom Agent Messaging this skillaannoo/hcom	561	—	~957	Automated safety check: Pass	MIT	yesterday
Orca CLIstablyai/orca	87k	2 repos	~593	Automated safety check: Pass	MIT	today
Paseo Advisor Second Opiniongetpaseo/paseo	20k	1 repos	~756	Automated safety check: Pass	Custom licence	today
O2 Review Loopopenobserve/openobserve	22k	—	~3.7k	Automated safety check: Pass	AGPL-3.0	today
Paseo Committeegetpaseo/paseo	20k	1 repos	~496	Automated safety check: Pass	Custom licence	today
Mission Control Agent APIbuilderz-labs/mission-control	6.3k	—	~2.1k	Automated safety check: Pass	MIT	10 days ago

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Questions about Hcom Agent Messaging

What does Hcom Agent Messaging do?

Multi-agent communication for AI coding tools. An agent skill from aannoo/hcom. Hcom Agent Messaging is an agent skill from aannoo/hcom. Multi-agent communication for AI coding tools.

When should I use Hcom Agent Messaging?

Hcom Agent Messaging fits situations like: setting up hcom; troubleshooting.

How do I install Hcom Agent Messaging in Claude Code?

Run `npx skills add aannoo/hcom --skill hcom-agent-messaging -a claude-code`. Or copy the skill folder (skills/hcom-agent-messaging in aannoo/hcom) into .claude/skills/hcom-agent-messaging in your project. Claude Code loads it when a task matches its description.

How do I install Hcom Agent Messaging in Codex?

Run `npx skills add aannoo/hcom --skill hcom-agent-messaging -a codex`. Or copy the skill folder (skills/hcom-agent-messaging in aannoo/hcom) into .agents/skills/hcom-agent-messaging in your project. Codex loads it when a task matches its description.

Can I use Hcom Agent Messaging in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add aannoo/hcom --skill hcom-agent-messaging -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/hcom-agent-messaging, .gemini/skills/hcom-agent-messaging, .github/skills/hcom-agent-messaging and .opencode/skills/hcom-agent-messaging in your project.

What does Hcom Agent Messaging need to run?

Going by SKILL.md and its folder, Hcom Agent Messaging needs the command-line tools its instructions call (uv and git).

Does Hcom Agent Messaging access the network?

SKILL.md names 1 domain. As links in the text: github.com. This is read from the text; nothing was executed.

Is Hcom Agent Messaging safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Hcom Agent Messaging use?

Hcom Agent Messaging is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Hcom Agent Messaging use?

About 957 tokens (SKILL.md is roughly 3.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Hcom Agent Messaging?

Skills that share tags, products or a category with Hcom Agent Messaging: Orca CLI (stablyai/orca, 87k stars), Paseo Advisor Second Opinion (getpaseo/paseo, 20k stars), O2 Review Loop (openobserve/openobserve, 22k stars) and Paseo Committee (getpaseo/paseo, 20k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Hcom Agent Messaging?

aannoo (a GitHub user) maintains it in aannoo/hcom, which has 561 GitHub stars. The repository was last updated on October 6, 2026.

Source: aannoo/hcom on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Hcom Agent Messaging

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

hcom — multi-agent communication for AI coding tools

what humans can do

what agents can do

setup

troubleshooting

"hcom not working"

sandbox / permission issues

files

more info

Files

Compare with similar skills

Similar skills

Orca CLI

Paseo Advisor Second Opinion

O2 Review Loop

Paseo Committee

Mission Control Agent API

Paseo Agent Handoff

Related

Questions about Hcom Agent Messaging