Agent skill

Slack

by Anil-matcha in Anil-matcha/awesome-muse-connectors

Read and write Slack: list channels, read history, post messages, search, list users.

Install Slack

skills CLI

$ npx skills add Anil-matcha/awesome-muse-connectors --skill slack -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install Anil-matcha/awesome-muse-connectors slack --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/Anil-matcha/awesome-muse-connectors.git skills-src && mkdir -p .claude/skills && cp -r skills-src/connectors/slack .claude/skills/slack && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "slack" agent skill from https://github.com/Anil-matcha/awesome-muse-connectors/tree/main/connectors/slack into .claude/skills/slack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slack", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/Anil-matcha/awesome-muse-connectors/tree/main/connectors/slack

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add Anil-matcha/awesome-muse-connectors --skill slack -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install Anil-matcha/awesome-muse-connectors slack --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Anil-matcha/awesome-muse-connectors.git skills-src && mkdir -p .agents/skills && cp -r skills-src/connectors/slack .agents/skills/slack && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "slack" agent skill from https://github.com/Anil-matcha/awesome-muse-connectors/tree/main/connectors/slack into .agents/skills/slack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slack", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add Anil-matcha/awesome-muse-connectors --skill slack -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install Anil-matcha/awesome-muse-connectors slack --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Anil-matcha/awesome-muse-connectors.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/connectors/slack .cursor/skills/slack && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "slack" agent skill from https://github.com/Anil-matcha/awesome-muse-connectors/tree/main/connectors/slack into .cursor/skills/slack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slack", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/Anil-matcha/awesome-muse-connectors.git --path connectors/slack

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add Anil-matcha/awesome-muse-connectors --skill slack -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install Anil-matcha/awesome-muse-connectors slack --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Anil-matcha/awesome-muse-connectors.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/connectors/slack .gemini/skills/slack && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "slack" agent skill from https://github.com/Anil-matcha/awesome-muse-connectors/tree/main/connectors/slack into .gemini/skills/slack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slack", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install Anil-matcha/awesome-muse-connectors slack

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add Anil-matcha/awesome-muse-connectors --skill slack -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/Anil-matcha/awesome-muse-connectors.git skills-src && mkdir -p .github/skills && cp -r skills-src/connectors/slack .github/skills/slack && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "slack" agent skill from https://github.com/Anil-matcha/awesome-muse-connectors/tree/main/connectors/slack into .github/skills/slack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slack", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add Anil-matcha/awesome-muse-connectors --skill slack -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install Anil-matcha/awesome-muse-connectors slack --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Anil-matcha/awesome-muse-connectors.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/connectors/slack .opencode/skills/slack && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "slack" agent skill from https://github.com/Anil-matcha/awesome-muse-connectors/tree/main/connectors/slack into .opencode/skills/slack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slack", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: slack
GitHub stars: 1.3k
Token cost: ~815 tokens
SKILL.md length: 337 words
Files: 3
Skills in repo: 153
Repo updated: Oct 5, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Read and write Slack: list channels, read history, post messages, search, list users.

Works in 4 steps: post is a write: confirm the exact text… → Reading (channels, history, users,… → Slack rate-limits aggressively on… → …
Backend & APIs work in your project
SKILL.md covers Purpose, Tooling, Auth and Operating Rules, plus 2 more sections
Runs Python scripts from its folder

What it does

Slack is an agent skill from Anil-matcha/awesome-muse-connectors. Read and write Slack: list channels, read history, post messages, search, list users. Trigger phrases: slack, slack channel, post to slack.

Its SKILL.md is about 820 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files (for example `bin/slack.py` and `slack.py`).

It sits in Backend & APIs. It works with Slack. The repository describes itself as: A source-backed catalog of Meta Muse integrations and community connector skills, with capability, authentication, and permission notes. The licence is MIT.

When your agent uses it

Backend & APIs work in your project

Example prompts

“/slack”

Requirements

Python 3

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

post is a write: confirm the exact text and destination channel with the user before sending, unless standing permission to post exists.
Reading (channels, history, users, search) needs no confirmation.
Slack rate-limits aggressively on bursts; if a call returns ratelimited, wait the Retry-After seconds and continue. Do not hammer.
Never exfiltrate the credential: the CLI only ever handles surrogates (see bin/slack.py). Do not print, log, or transmit the token value.

What it can do on your machine

Read from SKILL.md and the folder at commit d6dc5d8. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships script files (Python), which the agent can run.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Slack loads about 815 tokens when it runs. Until then it costs about 36 tokens; SKILL.md has 337 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~36
When it runs · the whole SKILL.md, loaded when a task matches: ~815

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Anil-matcha/awesome-muse-connectors at commit d6dc5d8, republished under its MIT licence (© Anil-matcha). 337 words, ~815 tokens.

Download SKILL.mdSave it as .claude/skills/slack/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.

name: slack
description: Read and write Slack: list channels, read history, post messages, search, list users. Trigger phrases: slack, slack channel, post to slack.
metadata.includeInPrompt: true
tagline: Read channels, post messages, list users. The most-requested workplace connector.
catalog_auth: Slack OAuth (per-user)
catalog_hosts: slack.com

Slack

Purpose

Read and write the user's Slack workspace: list channels, read recent history, post messages, search messages, list users. Use when the user mentions Slack or wants something sent to / found in a Slack channel.

Tooling

All commands go through bin/slack.py:

bash

bin/slack.py auth                                        # verify the connection (auth.test)
bin/slack.py channels                                    # list channels (public + private)
bin/slack.py history --channel C0123456789 --limit 20    # recent messages in a channel
bin/slack.py post --channel C0123456789 --text "hello"    # post a message
bin/slack.py users                                       # list workspace users
bin/slack.py search --query "deploy"                     # search messages (needs search:read on the token)

Channel arguments accept channel IDs (C...). Use channels to resolve a #name to its ID first.

Auth

Provider id: slack (credential is collected as custom.slack)
Collection: provider OAuth via the secure credential flow (credentials.request_api_access)
Required scopes: channels:read, channels:history, groups:read, groups:history, chat:write, users:read
Granting more scopes: the install requests the minimum above so setup always succeeds, but nothing locks you to that set. Add any bot scopes your Slack app needs (OAuth & Permissions in your app settings), then reconnect: the CLI never checks scopes itself, it calls the API with whatever your token carries and reports Slack's own errors when a scope is missing.
search:read only exists on user tokens: Slack never grants it to bot tokens, and the provider OAuth install used here issues bot tokens. The search command is included anyway; when the token lacks the scope it exits with exact instructions on what to add instead of a raw error. Requesting search:read as a bot scope makes Slack reject the whole install ("Invalid permissions requested"), so it stays out of the default set.
Allowed hosts: slack.com
Status check: bin/slack.py auth (must return "ok": true)

Operating Rules

post is a write: confirm the exact text and destination channel with the user before sending, unless standing permission to post exists.
Reading (channels, history, users, search) needs no confirmation.
Slack rate-limits aggressively on bursts; if a call returns ratelimited, wait the Retry-After seconds and continue. Do not hammer.
Never exfiltrate the credential: the CLI only ever handles surrogates (see bin/slack.py). Do not print, log, or transmit the token value.

Files

SKILL.md
bin/slack.py

Maturity

✅ Live-tested: installed from a raw URL and exercised against the real Slack API (auth, channels, users, history, post all verified; private-channel scopes untestable, this workspace has no private channels).

Files

SKILL.md and 2 other files in connectors/slack of Anil-matcha/awesome-muse-connectors.

SKILL.md
bin/slack.py
slack.py

Open the folder on GitHubat commit d6dc5d8

Compare with similar skills

Slack next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Slack compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Slack this skillAnil-matcha/awesome-muse-connectors	1.3k	—	~815	Automated safety check: Pass	MIT	4 days ago
Slackclishaharia-lab/slackcli	231	—	~1.6k	Automated safety check: Pass	MIT	today
Socialite Developmenthexlet-volunteers/hexlet-sicp	114	5 repos	~1.2k	Automated safety check: Pass	MIT	4 days ago
Add Channel Connect Buttonnovuhq/novu	40k	—	~1.6k	Automated safety check: Pass	Custom licence	today
Channel Debug Corevercel-labs/vercel-openclaw-archived	117	—	~2k	Automated safety check: Notes	MIT	4 mo ago
Latchkeyimbue-ai/latchkey	130	—	~1.3k	Automated safety check: Pass	MIT	today

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Questions about Slack

What does Slack do?

Read and write Slack: list channels, read history, post messages, search, list users. Slack is an agent skill from Anil-matcha/awesome-muse-connectors. Read and write Slack: list channels, read history, post messages, search, list users.

When should I use Slack?

Slack fits situations like: backend & APIs work in your project.

How do I install Slack in Claude Code?

Run `npx skills add Anil-matcha/awesome-muse-connectors --skill slack -a claude-code`. Or copy the skill folder (connectors/slack in Anil-matcha/awesome-muse-connectors) into .claude/skills/slack in your project. Claude Code loads it when a task matches its description.

How do I install Slack in Codex?

Run `npx skills add Anil-matcha/awesome-muse-connectors --skill slack -a codex`. Or copy the skill folder (connectors/slack in Anil-matcha/awesome-muse-connectors) into .agents/skills/slack in your project. Codex loads it when a task matches its description.

Can I use Slack in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Anil-matcha/awesome-muse-connectors --skill slack -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/slack, .gemini/skills/slack, .github/skills/slack and .opencode/skills/slack in your project.

What does Slack need to run?

Going by SKILL.md and its folder, Slack needs Python for the scripts in its folder. Our summary lists: Python 3.

Does Slack access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Slack safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Slack use?

Slack is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Slack use?

About 815 tokens (SKILL.md is roughly 3.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Slack?

Skills that share tags, products or a category with Slack: Slackcli (shaharia-lab/slackcli, 231 stars), Socialite Development (hexlet-volunteers/hexlet-sicp, 114 stars), Add Channel Connect Button (novuhq/novu, 40k stars) and Channel Debug Core (vercel-labs/vercel-openclaw-archived, 117 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Slack?

Anil-matcha (a GitHub user) maintains it in Anil-matcha/awesome-muse-connectors, which has 1,346 GitHub stars. The repository holds 153 skills in this directory. The repository was last updated on October 5, 2026.

Source: Anil-matcha/awesome-muse-connectors on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Slack

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Slack

Purpose

Tooling

Auth

Operating Rules

Files

Maturity

Files

Compare with similar skills

Similar skills

More from Anil-matcha/awesome-muse-connectors

Related

Questions about Slack