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Agent skill

Slack

by openclaw in openclaw/openclaw

Slack messaging workflows through OpenClaw's message tool. An agent skill from openclaw/openclaw.

MITAuto-check passed

Install Slack

skills CLI
$ npx skills add openclaw/openclaw --skill slack -a claude-code

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

GitHub CLI
$ gh skill install openclaw/openclaw 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/openclaw/openclaw.git skills-src && mkdir -p .claude/skills && cp -r skills-src/extensions/slack/skills/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/

Facts

Skill name
slack
GitHub stars
392k
Token cost
~299 tokens
SKILL.md length
143 words
Files
1
Skills in repo
93
Repo updated
First seen
Licence
MIT

At a glance

Slack messaging workflows through OpenClaw's message tool. An agent skill from openclaw/openclaw.

  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Slack is an agent skill from openclaw/openclaw. Slack messaging workflows through OpenClaw's message tool.

Its SKILL.md is about 300 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with Slack. The repository describes itself as: The AI that really does things. Any OS. Any Platform. The lobster way. 🦞. The licence is MIT.

Example prompts

  • “/slack”

Requirements

  • Pre-approved tools (allowed-tools): message

What it can do on your machine

Read from SKILL.md and the folder at commit 1eb5970. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • message

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    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 299 tokens when it runs. Until then it costs about 16 tokens; SKILL.md has 143 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~16
When it runs · the whole SKILL.md, loaded when a task matches
~299

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 openclaw/openclaw at commit 1eb5970, republished under its MIT licence (© openclaw). 143 words, ~299 tokens.

Download SKILL.mdSave it as .claude/skills/slack/SKILL.md (or your agent's skills folder).
name
slack
description
Slack messaging workflows through OpenClaw's message tool.
allowed-tools
message

Slack

Use the message tool with channel: "slack". The tool schema lists the actions enabled for the current Slack account; do not assume an action that is not present.

Workflow

  • Prefer stable Slack IDs from context. Sends outside the current conversation use channel:<id> or user:<id> targets.
  • Keep replies in the current thread unless the user asks for a top-level post. For another thread, pass its Slack timestamp as threadId; use the same timestamp as messageId for message-specific actions.
  • Before editing, deleting, pinning, or reacting to an ambiguous message, read the conversation and resolve its exact ID.
  • When multiple Slack accounts are configured, pass accountId rather than guessing.
  • Confirm destructive deletes when the target or intent is unclear.

Slack formatting, mentions, and available actions are described automatically by the current message tool hints. Follow those hints instead of maintaining a second action catalog here.

© openclaw, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in extensions/slack/skills/slack of openclaw/openclaw.

Open the folder on GitHubat commit 1eb5970

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
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Slack this skillopenclaw/openclaw392k—~299Automated safety check: PassMIT
Agent Browser CLIvercel-labs/agent-browser44k24 repos~864Automated safety check: PassApache-2.0
Slack GIF Creatoranthropics/skills180k29 repos~2kAutomated safety check: PassApache-2.0
Code Design Rationale Investigatorcursor/plugins10k9 repos~2.6kAutomated safety check: PassNone
Electron App Automationvercel-labs/agent-browser44k5 repos~1.7kAutomated safety check: PassApache-2.0
Slack Browser Automationvercel-labs/agent-browser44k1 repos~2.1kAutomated safety check: PassApache-2.0

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Works with

Questions about Slack

What does Slack do?

Slack messaging workflows through OpenClaw's message tool. An agent skill from openclaw/openclaw. Slack is an agent skill from openclaw/openclaw. Slack messaging workflows through OpenClaw's message tool.

How do I install Slack in Claude Code?

Run `npx skills add openclaw/openclaw --skill slack -a claude-code`. Or copy the skill folder (extensions/slack/skills/slack in openclaw/openclaw) 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 openclaw/openclaw --skill slack -a codex`. Or copy the skill folder (extensions/slack/skills/slack in openclaw/openclaw) 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 openclaw/openclaw --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?

SKILL.md names no scripts, command-line tools or credentials: Slack is instructions for the agent only. Its frontmatter pre-approves these tools: message.

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 299 tokens (SKILL.md is roughly 1.2k 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: Agent Browser CLI (vercel-labs/agent-browser, 44k stars), Slack GIF Creator (anthropics/skills, 180k stars), Code Design Rationale Investigator (cursor/plugins, 10k stars) and Electron App Automation (vercel-labs/agent-browser, 44k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Slack?

openclaw (a GitHub organization) maintains it in openclaw/openclaw, which has 391,610 GitHub stars. The repository holds 93 skills in this directory. The repository was last updated on October 8, 2026.

Source: openclaw/openclaw on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.