How do I install the Slack skill?

Run npx skillmds@latest add openaeon/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. 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.

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

Slack by openaeon — Agent Skill

Name: Slack
Author: openaeon

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 OpenAEON.

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 OpenAEON"
}

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.

---name: slackdescription: Use when you need to control Slack from OpenAEON 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 OpenAEON.## 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 OpenAEON"}```### 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.

Frequently asked questions

Slack