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slack-message-formatter SKILL.md skillA

slack-message-formatter from davepoon/buildwithclaude is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add davepoon/buildwithclaude/slack-message-formatter@git:20260324.36d3f3f

Pins git:20260324.36d3f3f in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: davepoon/buildwithclaude
Path: plugins/all-skills/skills/slack-message-formatter/SKILL.md
Versions recorded: 1
Latest version: git:20260324.36d3f3f, committed Mar 24, 2026
Size: 3,966 bytes
Repository stars: 3,724
License: MIT

Format messages for Slack with pixel-perfect accuracy. Converts Markdown to rich HTML (for copy-paste into Slack) or Slack mrkdwn (for API/webhook). Use when the user asks to write a Slack message, announcement, or notification, format something "for Slack", preview how content looks in Slack, or send a message via Slack webhook. Also trigger when user mentions Slack formatting, mrkdwn, or wants to share Markdown content in Slack channels.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Slack Message Formatter

Format messages for Slack with pixel-perfect accuracy. Converts Markdown to Slack-compatible output with two delivery paths:

1. **Copy-paste** — Rich HTML that preserves formatting when pasted into Slack's compose box
2. **API/Webhook** — Slack mrkdwn syntax for bots, automation, and CI/CD

## When to Use This Skill

- User asks to write a Slack message, announcement, or notification
- User asks to format something "for Slack"
- User wants to preview how a message will look in Slack
- User wants to send a message via Slack webhook
- User has Markdown content they want to share in Slack

## What This Skill Does

1. **Generates content in Markdown** — Claude writes the message in standard Markdown, its native format
2. **Converts to Rich HTML** — Transforms Markdown into rich HTML that preserves formatting when pasted into Slack's compose box
3. **Converts to Slack mrkdwn** — Transforms Markdown into Slack's proprietary mrkdwn syntax for API/webhook delivery
4. **Generates a Slack-themed preview** — Creates an HTML preview page styled like the Slack UI and opens it in the browser
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add davepoon/buildwithclaude/slack-message-formatter@sha256:abedf511e4811a27

The line at the top of this page pins the label git:20260324.36d3f3f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_e4tfzfzkugm4jk3v.svg)](https://markdownregistry.com/a/art_e4tfzfzkugm4jk3v)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Mar 24, 2026.

version	committed	commit	size	audit
git:20260324.36d3f3f latest	2026-03-24	36d3f3f	3,966 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (3966 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

davepoon/buildwithclaude · 3,724 stars · license MIT · pushed 2026-11-05 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_e4tfzfzkugm4jk3v
GET https://markdownregistry.com/api/v1/resolve?ref=davepoon/buildwithclaude/slack-message-formatter
GET https://markdownregistry.com/api/v1/blob/abedf511e4811a27d62fff36b7da55e37a37cac86c60b00898e60c9793de6ea8

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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