slack

slack is a skill for Claude Code, Codex from Threat-Vector-Security/guardian-agent. It costs 0 tokens per session (646 once invoked), scanned A, a copy of slack, Apache-2.0.

A Slack integration for managing messages, reactions, pins, custom emoji, and member information in Slack, a team communication service.

In plain words
What is it for?
Use it to read, send, edit, or delete messages; add or inspect reactions; manage pins; list custom emoji; and fetch member information.
Why use it?
It lets the coding agent handle routine Slack actions without switching between tools or manually copying message details.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/threat-vector-security/guardian-agent/slack
Any agent
npx skills add Threat-Vector-Security/guardian-agent --skill slack
Clone the repo
git clone --depth 1 https://github.com/Threat-Vector-Security/guardian-agent

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 slack

README.md
[![agentmods](https://agentmods.dev/badge/skills/threat-vector-security/guardian-agent/slack.svg)](https://agentmods.dev/skills/threat-vector-security/guardian-agent/slack)
Your own site
<a href="https://agentmods.dev/skills/threat-vector-security/guardian-agent/slack"><img src="https://agentmods.dev/badge/skills/threat-vector-security/guardian-agent/slack.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 646 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 86% copy Near-identical to another mod 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 $0.00000 $0.00646
Opus 5 $0.00000 $0.00323
Sonnet 5 $0.00000 $0.00129
Haiku 4.5 $0.00000 $0.00065

Measured 5d ago against content hash c5fe3cc44be1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

slack 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 5d 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.

Origin

This is a copy

86% identical to slack — 24 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/slack/SKILL.md · 139 lines

How it starts

The opening of the file, as written. The whole thing — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Slack Actions

Overview

Use slack to react, manage pins, send/edit/delete messages, and fetch member info through the configured Slack provider.

Inputs to collect

  • channelId and messageId (Slack message timestamp, e.g. 1712023032.1234).
  • For reactions, an emoji (Unicode or :name:).
  • For message sends, a to target (channel:<id> or user:<id>) and content.

Message context lines include slack message id and channel fields you can reuse directly.

Actions

Action groups

Action group Default Notes
reactions enabled React + list reactions
messages enabled Read/send/edit/delete
pins enabled Pin/unpin/list
memberInfo enabled Member info
emojiList enabled Custom emoji list

React to a message

{
  "action": "react",
  "channelId": "C123",
  "messageId": "1712023032.1234",
  "emoji": "✅"
}

List reactions

{
  "action": "reactions",
  "channelId": "C123",
  "messageId": "1712023032.1234"
}

Send a message

{
  "action": "sendMessage",
  "to": "channel:C123",
  "content": "Hello from Guardian"
}

Edit a message

{
  "action": "editMessage",
  "channelId": "C123",
  "messageId": "1712023032.1234",
  "content": "Updated text"
}

Delete a message

{
  "action": "deleteMessage",
  "channelId": "C123",
  "messageId": "1712023032.1234"
}

Read recent messages

{
  "action": "readMessages",
  "channelId": "C123",
  "limit": 20
}

Pin a message

{
  "action": "pinMessage",
  "channelId": "C123",
  "messageId": "1712023032.1234"
}

Unpin a message

{
  "action": "unpinMessage",
  "channelId": "C123",
  "messageId": "1712023032.1234"
}

List pinned items

{
  "action": "listPins",
  "channelId": "C123"
}

Member info

{
  "action": "memberInfo",
  "userId": "U123"
}

Emoji list

{
  "action": "emojiList"
}

Read the full file on GitHub · 139 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 5d ago First seen · 139 lines · 0 tokens per session scan A c5fe3cc44be1

Subscribe to this mod's changes

slack is a skill published in the GitHub repository Threat-Vector-Security/guardian-agent (11 stars, last pushed 2mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 646 tokens. A static security scan graded it A with 0 findings. It is 86% identical to slack, differing in 24 lines, and is treated as a copy.

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