How do I install the Slack skill?

Run npx skillmds@latest add tomevault-io/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. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. 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.

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

Slack by tomevault-io — Agent Skill

Name: Slack
Author: tomevault-io

Slack

Use when the agent needs to send, edit, delete, or read Slack messages, add or list emoji reactions, pin or unpin messages, fetch member info, or list custom emoji in Slack channels and DMs. Handles all Slack workspace interactions including message management, reaction workflows, pinned-item management, and user lookups via the configured bot token.

tomevault-io Updated Sep 17, 2026

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 Otto.

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 Otto"
}

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.

Converted and distributed by TomeVault — claim your Tome and manage your conversions.

---name: slackdescription: Use when the agent needs to send, edit, delete, or read Slack messages, add or list emoji reactions, pin or unpin messages, fetch member info, or list custom emoji in Slack channels and DMs. Handles all Slack workspace interactions including message management, reaction workflows, pinned-item management, and user lookups via the configured bot token.---# Slack Actions## OverviewUse `slack` to react, manage pins, send/edit/delete messages, and fetch member info. The tool uses the bot token configured for Otto.## 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 Otto"}```### 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.---> Converted and distributed by [TomeVault](https://tomevault.io/claim/elizaos) — claim your Tome and manage your conversions.

Frequently asked questions