How do I install the Slack skill?

Run npx skillmds@latest add grtninja/slack in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Slack safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: makes network calls, reads secrets. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Slack?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Slack free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

grtninja (@grtninja) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Slack by grtninja — Agent Skill

Name: Slack
Rating: 4.5 (4 reviews)
Author: grtninja

File contents

Slack Actions

Overview

Use slack to react, manage pins, send/edit/delete messages, and fetch member info. The tool uses the bot token configured for OpenClaw.

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 OpenClaw"
}

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"
}

Ideas to try

React with ✅ to mark completed tasks.
Pin key decisions or weekly status updates.

Guardrails

Use local or trusted tools only; avoid untrusted install pipelines.
Do not paste secrets/tokens into chat output.
Keep outputs in deterministic local paths for reproducible review.

---name: slackdescription: Use when you need to control Slack from OpenClaw via the slack tool, including reacting to messages or pinning/unpinning items in Slack channels or DMs.---# Slack Actions## OverviewUse `slack` to react, manage pins, send/edit/delete messages, and fetch member info. The tool uses the bot token configured for OpenClaw.## 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```json{ "action": "react", "channelId": "C123", "messageId": "1712023032.1234", "emoji": "✅"}```### List reactions```json{ "action": "reactions", "channelId": "C123", "messageId": "1712023032.1234"}```### Send a message```json{ "action": "sendMessage", "to": "channel:C123", "content": "Hello from OpenClaw"}```### Edit a message```json{ "action": "editMessage", "channelId": "C123", "messageId": "1712023032.1234", "content": "Updated text"}```### Delete a message```json{ "action": "deleteMessage", "channelId": "C123", "messageId": "1712023032.1234"}```### Read recent messages```json{ "action": "readMessages", "channelId": "C123", "limit": 20}```### Pin a message```json{ "action": "pinMessage", "channelId": "C123", "messageId": "1712023032.1234"}```### Unpin a message```json{ "action": "unpinMessage", "channelId": "C123", "messageId": "1712023032.1234"}```### List pinned items```json{ "action": "listPins", "channelId": "C123"}```### Member info```json{ "action": "memberInfo", "userId": "U123"}```### Emoji list```json{ "action": "emojiList"}```## Ideas to try- React with ✅ to mark completed tasks.- Pin key decisions or weekly status updates.## Guardrails- Use local or trusted tools only; avoid untrusted install pipelines.- Do not paste secrets/tokens into chat output.- Keep outputs in deterministic local paths for reproducible review.

Frequently asked questions

Slack