Add slack-message-formatter plugin

README-zh.md

@@ -130,6 +130,7 @@
 - [python-expert](./plugins/python-expert)
 - [rapid-prototyper](./plugins/rapid-prototyper)
 - [react-native-dev](./plugins/react-native-dev)
+- [slack-message-formatter](./plugins/slack-message-formatter)
 - [vision-specialist](./plugins/vision-specialist)
 - [web-dev](./plugins/web-dev)
 

README.md

@@ -130,6 +130,7 @@ Install or disable them dynamically with the `/plugin` command — enabling you
 - [python-expert](./plugins/python-expert)
 - [rapid-prototyper](./plugins/rapid-prototyper)
 - [react-native-dev](./plugins/react-native-dev)
+- [slack-message-formatter](./plugins/slack-message-formatter)
 - [vision-specialist](./plugins/vision-specialist)
 - [web-dev](./plugins/web-dev)
 

plugins/slack-message-formatter/.claude-plugin/plugin.json

@@ -0,0 +1,10 @@
+{
+  "name": "slack-message-formatter",
+  "description": "Format Markdown for Slack. Rich HTML copy-paste + mrkdwn API output.",
+  "version": "1.0.0",
+  "author": {
+    "name": "karanb192",
+    "url": "https://github.com/karanb192"
+  },
+  "homepage": "https://github.com/karanb192/slack-message-formatter"
+}

plugins/slack-message-formatter/commands/slack-message-formatter.md

@@ -0,0 +1,31 @@
+---
+description: Format Markdown for Slack. Rich HTML copy-paste + mrkdwn API output.
+author: karanb192
+author-url: https://github.com/karanb192
+version: 1.0.0
+---
+
+# Slack Message Formatter
+
+This slash command formats messages for Slack with pixel-perfect accuracy. It converts standard 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
+
+## Key Features
+
+- Converts bold, italic, strikethrough, code, links, headings, tables, task lists, and more
+- Handles Slack mentions (`<@U...>`, `<#C...>`, `<!here>`) as pass-through
+- Generates a Slack-themed browser preview page
+- Copies rich HTML to clipboard for instant paste into Slack
+- Supports direct webhook sending via `CCH_SLA_WEBHOOK` environment variable
+- Converts 150+ emoji shortcodes to native Unicode
+
+## Usage
+
+```
+/slack-message-formatter preview
+/slack-message-formatter send
+```
+
+Write your message in standard Markdown, and the formatter handles conversion to Slack's mrkdwn syntax and rich HTML automatically.