notify-slack
This skill should be used when the agent needs to "send a message on Slack", "notify via Slack", or "post to Slack channel".
Skill by ar90n
Chalk Labs
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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/ar90n-notify-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
Use cases: productivity, agent-building
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Permissions
What this skill can do and what it asks for, from its SKILL.md. 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/notify-slack
What's inside
- Skill name
notify-slack- Description
- This skill should be used when the agent needs to "send a message on Slack", "notify via Slack", or "post to Slack channel". Uses Slack Incoming Webhook. Requires SLACK_WEBHOOK_URL.
- License
- MIT
- Instructions
- 29 lines in SKILL.md · view on GitHub
Before installing
- Instructions call the network
Files (1)
- SKILL.md
SKILL.md (first lines)
# Slack Notification
Send messages to a Slack channel via Incoming Webhook.
## Environment Variables
- `SLACK_WEBHOOK_URL`: Incoming Webhook URL (required)
## Sending Messages
```bash
curl -sf -X POST "$SLACK_WEBHOOK_URL" \
-H 'Content-Type: application/json' \
-d "{\"text\": \"$MESSAGE\"}"
```
## Formatting
Use Slack mrkdwn format:
- `*bold*`, `_italic_`, `~strikethrough~`
- `` `code` ``, ` ```code block``` `
- `<url|text>` for links
## Error Handling
- Network error: retry once after 5s.
- 2 failures: report error, do not retry.From ar90n/claude-inbox, MIT.
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Signals
- Stars
- 0
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- Feb 15, 2026 (8 months ago)
- Last release
- Mar 11, 2026 (7 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/ar90n/claude-inbox
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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This skill should be used when the user asks to "watch a URL", "monitor a webpage", "notify me when something changes", "track releases", "watch for updates"…
SkillDFreshness: DClaude Code +9 - 0.385score
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Cite this page
notify-slack skill. Agent Mart. https://agentmart.dev/skills/ar90n-notify-slack (last updated 2026-10-24)