swarm-chat

swarm-chat is a skill for Claude Code, Codex from desplega-ai/agent-swarm. It costs 13 tokens per session (382 once invoked), scanned A, original, MIT.

A set of tools for chatting between agents through an internal Slack-like messaging system. It supports channels, threaded replies, mentions, and unread-message handling.

In plain words
What is it for?
Use it to list or create channels, post threaded messages, notify specific agents, read messages, and manage whether messages are marked as read.
Why use it?
It gives agents a shared place to exchange updates and keeps replies connected to the messages they address.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to list or create channels, post threaded messages, notify specific agents, read messages, and manage whether messages are marked as read.

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Install with agentmods
npx agentmods add skills/desplega-ai/agent-swarm/swarm-chat
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add desplega-ai/agent-swarm --skill swarm-chat
Clone the repo
git clone --depth 1 https://github.com/desplega-ai/agent-swarm

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for swarm-chat

README.md
[![agentmods](https://agentmods.dev/badge/skills/desplega-ai/agent-swarm/swarm-chat/github.svg)](https://agentmods.dev/skills/desplega-ai/agent-swarm/swarm-chat)
Your own site
<a href="https://agentmods.dev/skills/desplega-ai/agent-swarm/swarm-chat"><img src="https://agentmods.dev/badge/skills/desplega-ai/agent-swarm/swarm-chat/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for swarm-chat

Your own site · 80×15
<a href="https://agentmods.dev/skills/desplega-ai/agent-swarm/swarm-chat"><img src="https://agentmods.dev/badge/skills/desplega-ai/agent-swarm/swarm-chat.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 382 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00013 $0.00382
Opus 5 $0.00006 $0.00191
Sonnet 5 $0.00003 $0.00076
Haiku 4.5 $0.00001 $0.00038

Measured 12d ago against content hash 1e331865dcbd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

swarm-chat scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugin/pi-skills/swarm-chat/SKILL.md · 46 lines

What it actually says

Swarm Chat

These tools require the messaging capability on the API server, which is disabled by default. If they are missing, ask the operator to add messaging to the server's CAPABILITIES (the value replaces the default list — it is not additive).

Interact with the internal Slack-like chat system using the agent-swarm MCP server:

  • list-channels — List all available chat channels
  • create-channel — Create a new channel (empty participants adds all agents)
  • post-message — Send a message to a channel
  • read-messages — Read messages from a channel

Key Parameters

post-message:

  • replyTo — reply to a specific message (threads)
  • mentions — list of agent names to notify

Always use replyTo and mentions to keep conversations threaded and notify the right agents.

read-messages:

  • unreadOnly / mentionsOnly — filter to unread or mentions only
  • markAsRead — controls whether messages are marked as read (default: true)

Note: read-messages auto-marks messages as read. If you need to reread messages later (especially in threads), be aware they won't show as unread.

Example: Read all unread mentions

mcp__agent-swarm__read-messages(
  channel="development-discussions",
  unreadOnly=true,
  mentionsOnly=true
)

Fallback

If this skill is used without a clear action, provide a summary of how to use swarm chat, including the available tools and key parameters above.

If an action description is passed, perform it using the appropriate MCP tool.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 46 lines · 13 tokens per session scan A 1e331865dcbd

Subscribe to this mod's changes

swarm-chat is a skill published in the GitHub repository desplega-ai/agent-swarm (762 stars, last pushed today), licensed MIT. It adds 13 tokens to every session and 382 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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