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c-slack

Send messages and upload files to Slack channels using the `slack` CLI.

Skill by daxaur

IndexedMIT★ 173
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Install

Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/daxaur-c-slack

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Send messages and upload files to Slack channels using the `slack` CLI. Supports direct messages, channel posts, file uploads, and thread replies.

Use cases: productivity

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Permissions

What this skill can do and what it asks for, from its SKILL.md and code. Checked Oct 25, 2026.

Tools
No tools found
Secrets
None asked for
Install scripts
None found

Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/c-slack

What's inside

Skill name
c-slack
Description
Send messages and upload files to Slack channels using the `slack` CLI. Supports direct messages, channel posts, file uploads, and thread replies.
License
MIT
Instructions
42 lines in SKILL.md · view on GitHub

Files (1)

  • SKILL.md

SKILL.md (first lines)

## What This Skill Does

Enables Claude to send messages and share files to Slack channels and users via the `slack` CLI tool.

## Available CLI Tool: `slack`

### Common Commands

```bash
# Send a message to a channel
slack chat send --channel "#general" --text "Hello team"

# Send a direct message to a user
slack chat send --channel "@username" --text "Hey!"

# Upload a file to a channel
slack files upload --channel "#general" --file ./report.pdf --title "Weekly Report"

# Post with markdown formatting
slack chat send --channel "#dev" --text "*Bold* and _italic_ text"

# Reply in a thread (requires thread timestamp)
slack chat send --channel "#general" --thread-ts "1234567890.123456" --text "Reply here"

# List channels
slack channels list
```

## Usage Guidelines

- Always confirm the target channel or user before sending
- Use `#channel-name` syntax for channels and `@username` for DMs
- File uploads support PDF, images, text, and most common formats
- Keep messages concise; use threads for follow-ups

## Notes

- Requires `slack` CLI to be installed and authenticated (`slack auth`)
- Bot token must have `chat:write` and `files:write` scopes
- Rate limits apply — avoid bulk sending in tight loops

From daxaur/openpaw, MIT.

More from daxaur/openpaw

Signals

Stars
173
Forks
12
Open issues
0
Last commit (this folder)
Feb 28, 2026 (8 months ago)
Last release
May 23, 2026 (5 months ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

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Cite this page

c-slack skill. Agent Mart. https://agentmart.dev/skills/daxaur-c-slack (last updated 2026-10-24)