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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

IndexedMIT
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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

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.

Use cases: productivity, agent-building

Reviews

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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.

More from ar90n/claude-inbox

Signals

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Forks
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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

More from ar90n

Cite this page

notify-slack skill. Agent Mart. https://agentmart.dev/skills/ar90n-notify-slack (last updated 2026-10-24)