c-slack
About
This Claude Skill enables sending messages and files to Slack via the `slack` CLI tool. It supports direct messages, channel posts, file uploads, and threaded replies with markdown formatting. Developers can use it to automate Slack notifications and file sharing directly from Claude.
Quick Install
Claude Code
Recommendednpx skills add daxaur/openpaw -a claude-code/plugin add https://github.com/daxaur/openpawgit clone https://github.com/daxaur/openpaw.git ~/.claude/skills/c-slackCopy and paste this command in Claude Code to install this skill
Documentation
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
# 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-namesyntax for channels and@usernamefor DMs - File uploads support PDF, images, text, and most common formats
- Keep messages concise; use threads for follow-ups
Notes
- Requires
slackCLI to be installed and authenticated (slack auth) - Bot token must have
chat:writeandfiles:writescopes - Rate limits apply — avoid bulk sending in tight loops
GitHub Repository
Frequently asked questions
What is the c-slack skill?
c-slack is a Claude Skill by daxaur. Skills package instructions and resources that Claude loads on demand, so Claude can perform c-slack-related tasks without extra prompting.
How do I install c-slack?
Use the install commands on this page: add c-slack to Claude Code as a plugin, or clone its repository into your skills directory, then restart Claude so it picks up the skill.
What category does c-slack belong to?
c-slack is in the Communication category, tagged slack, messaging, communication and files.
Is c-slack free to use?
Yes. c-slack is listed on AIMCP and free to install. It runs inside Claude, so no separate service account is required to use the skill itself.
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