Cao Plugin
awslabs/cli-agent-orchestrator
Create a new CAO (CLI Agent Orchestrator) plugin. An agent skill from awslabs/cli-agent-orchestrator.
Read and search messages, channels, and threads in the user's Slack workspace.
Install Slack
$ npx skills add asgeirtj/system_prompts_leaks --skill slack -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install asgeirtj/system_prompts_leaks slack --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks.git skills-src && mkdir -p .claude/skills && cp -r skills-src/Meta/muse-agent/skills/slack .claude/skills/slack && rm -rf skills-srcUse ~/.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/
Install the "slack" agent skill from https://github.com/asgeirtj/system_prompts_leaks/tree/main/Meta/muse-agent/skills/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 install https://github.com/asgeirtj/system_prompts_leaks/tree/main/Meta/muse-agent/skills/slackType 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.
$ npx skills add asgeirtj/system_prompts_leaks --skill slack -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install asgeirtj/system_prompts_leaks slack --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks.git skills-src && mkdir -p .agents/skills && cp -r skills-src/Meta/muse-agent/skills/slack .agents/skills/slack && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "slack" agent skill from https://github.com/asgeirtj/system_prompts_leaks/tree/main/Meta/muse-agent/skills/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.
$ npx skills add asgeirtj/system_prompts_leaks --skill slack -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install asgeirtj/system_prompts_leaks slack --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/Meta/muse-agent/skills/slack .cursor/skills/slack && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "slack" agent skill from https://github.com/asgeirtj/system_prompts_leaks/tree/main/Meta/muse-agent/skills/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 https://github.com/asgeirtj/system_prompts_leaks.git --path Meta/muse-agent/skills/slack--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add asgeirtj/system_prompts_leaks --skill slack -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install asgeirtj/system_prompts_leaks slack --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/Meta/muse-agent/skills/slack .gemini/skills/slack && rm -rf skills-srcUse ~/.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/
Install the "slack" agent skill from https://github.com/asgeirtj/system_prompts_leaks/tree/main/Meta/muse-agent/skills/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.
$ gh skill install asgeirtj/system_prompts_leaks slackInstalls 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).
$ npx skills add asgeirtj/system_prompts_leaks --skill slack -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks.git skills-src && mkdir -p .github/skills && cp -r skills-src/Meta/muse-agent/skills/slack .github/skills/slack && rm -rf skills-srcUse ~/.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/
Install the "slack" agent skill from https://github.com/asgeirtj/system_prompts_leaks/tree/main/Meta/muse-agent/skills/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.
$ npx skills add asgeirtj/system_prompts_leaks --skill slack -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install asgeirtj/system_prompts_leaks slack --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/Meta/muse-agent/skills/slack .opencode/skills/slack && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "slack" agent skill from https://github.com/asgeirtj/system_prompts_leaks/tree/main/Meta/muse-agent/skills/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
- 69k
- Token cost
- ~362 tokens
- SKILL.md length
- 156 words
- Files
- 3
- Skills in repo
- 124
- Repo updated
- First seen
- Licence
- CC0-1.0
At a glance
Read and search messages, channels, and threads in the user's Slack workspace.
- Catch up on team discussions and decisions
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Post channel messages
- Reply to coworkers through Slacks official MCP server
What it does
Slack is an agent skill from asgeirtj/system_prompts_leaks. Read and search messages, channels, and threads in the user's Slack workspace. Use to catch up on team discussions and decisions, post channel messages, and reply to coworkers through Slack's official MCP server.
Its SKILL.md is about 360 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `connector_auth_config.yaml` and `manifest.yaml`).
It sits in Agent Workflows. It works with Slack and Model Context Protocol. The repository describes itself as: Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro… The licence is CC0-1.0.
When your agent uses it
- Catch up on team discussions and decisions
- Post channel messages
- Reply to coworkers through Slacks official MCP server
Example prompts
- “/slack”
What it can do on your machine
Read from SKILL.md and the folder at commit e31ec21. 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
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 362 tokens when it runs. Until then it costs about 55 tokens; SKILL.md has 156 words of instructions outside code blocks.
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 asgeirtj/system_prompts_leaks at commit e31ec21, republished under its CC0-1.0 licence (© asgeirtj). 156 words, ~362 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 search messages, channels, and threads in the user's Slack workspace. Use to catch up on team discussions and decisions, post channel messages, and reply to coworkers through Slack's official MCP server.
- icon
- slack
- metadata.includeInPrompt
- false
Slack
Use the installed slack CLI. Start with slack status. If it reports
not_connected, run slack authorize-url and share only the returned
connect_url with the user.
Slack requires a fixed registered app identity and does not support Dynamic
Client Registration. The test app is limited to its development workspace;
the production app must be approved for Slack Marketplace distribution before
users from other workspaces can connect.
Run slack list-tools to inspect the reviewed subset of the live provider
catalogue and its permission annotations, then call an advertised tool with:
slack call-tool --name <tool> --arguments-json '<json-object>'Slack's catalogue contains both reads and mutations and can change over time. The CLI allows only explicitly reviewed tools: read operations are allowed by default and mutations require approval with an argument preview. Unknown or new provider tools fail closed. Direct file reads, signed upload URLs, and unreviewed list tools remain unavailable until they have dedicated delivery handling. Never request OAuth tokens or app credentials in chat.
© asgeirtj, CC0-1.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 2 other files in Meta/muse-agent/skills/slack of asgeirtj/system_prompts_leaks.
- SKILL.md
- connector_auth_config.yaml
- manifest.yaml
Open the folder on GitHubat commit e31ec21
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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Slack this skillasgeirtj/system_prompts_leaks | 69k | — | ~362 | Automated safety check: Pass | CC0-1.0 | |
| Cao Pluginawslabs/cli-agent-orchestrator | 1.4k | — | ~3.1k | Automated safety check: Notes | Apache-2.0 | |
| Setup Context A8cwoocommerce/woocommerce-ios | 358 | — | ~627 | Automated safety check: Notes | GPL-2.0 | |
| Factory MCPwarpdotdev/warp | 65k | 1 repos | ~237 | Automated safety check: Pass | AGPL-3.0 | |
| Slack AnnounceWellApp-ai/Well | 345 | — | ~1.3k | Automated safety check: Pass | MIT | |
| Vercel Connectvercel/vercel-plugin | 301 | — | ~5.3k | Automated safety check: Pass | Custom licence |
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- Official
Setup Context A8c
woocommerce/woocommerce-ios
Set up the ContextA8C MCP server for accessing Automattic internal resources (Slack, Linear, P2s, GitHub Enterprise, etc.)
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Use the Warp Factory MCP to hand work to a software factory and collaborate with it — bundle local work and send it to the cloud, find factory tasks from a Slack thread / Linear ticket /…
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WellApp-ai/Well
Generate formatted Slack messages for team communication. An agent skill from WellApp-ai/Well.
- Official
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vercel/vercel-plugin
Vercel Connect expert guidance for securely obtaining scoped credentials for third-party services on behalf of apps or users.
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Route and complete Composio work across Composio For You and Composio Platform.
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Works with
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Questions about Slack
What does Slack do?
Read and search messages, channels, and threads in the user's Slack workspace. Slack is an agent skill from asgeirtj/system_prompts_leaks. Read and search messages, channels, and threads in the user's Slack workspace.
When should I use Slack?
Slack fits situations like: catch up on team discussions and decisions; post channel messages; reply to coworkers through Slacks official MCP server.
How do I install Slack in Claude Code?
Run `npx skills add asgeirtj/system_prompts_leaks --skill slack -a claude-code`. Or copy the skill folder (Meta/muse-agent/skills/slack in asgeirtj/system_prompts_leaks) 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 asgeirtj/system_prompts_leaks --skill slack -a codex`. Or copy the skill folder (Meta/muse-agent/skills/slack in asgeirtj/system_prompts_leaks) 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 asgeirtj/system_prompts_leaks --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.
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 CC0-1.0 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 362 tokens (SKILL.md is roughly 1.4k 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: Cao Plugin (awslabs/cli-agent-orchestrator, 1.4k stars), Setup Context A8c (woocommerce/woocommerce-ios, 358 stars), Factory MCP (warpdotdev/warp, 65k stars) and Slack Announce (WellApp-ai/Well, 345 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Slack?
asgeirtj (a GitHub user) maintains it in asgeirtj/system_prompts_leaks, which has 69,211 GitHub stars. The repository holds 124 skills in this directory. The repository was last updated on October 8, 2026.
Source: asgeirtj/system_prompts_leaks on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.