slack-message-formatter

v1.2.2

Convert Markdown to rich HTML for pasting into Slack or mrkdwn for webhooks.

CodexClaude Code1 Skill

By Karan BansalLicense: MIT11 GitHub starsUpdated last week

Directory evidence

Runtimes: Codex and Claude Code
Parsed components: 1 skill or MCP entry
Source updated: Oct 7, 2026
Manifest status: Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install slack-message-formatter for Codex and Claude Code

Installs for the current user

codex plugin marketplace add karanb192/slack-message-formatter
codex plugin marketplace upgrade slack-message-formatter
codex plugin add slack-message-formatter@slack-message-formatter

Paste and run these commands in a terminal with Codex. They add and refresh the slack-message-formatter catalog, then install this plugin.

Compatibility: the page URL and API slug “slack-message-formatter-2” remain stable.

Codex: slack-message-formatter-2@agent-plugin-marketplace → slack-message-formatter@slack-message-formatter

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually

$ git clone https://github.com/karanb192/slack-message-formatter

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The repository root is the plugin root.

Plugin files

slack-message-formatter/

├── .codex-plugin/plugin.json
├── .claude-plugin/plugin.json
└── skills/slack-message-formatter/SKILL.md

Included Skills1

slack-message-formatterskills/slack-message-formatter/SKILL.md

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 for ANY text the user will put into Slack: a message, thread reply, DM, announcement, notification, status update, or a "quick" one-liner. Trigger on "slack message", "reply on the thread", "message for the channel", "post this in slack", "send via webhook", "format for slack", mrkdwn, or previewing how content looks in Slack. Shortness is not a reason to skip this skill, and neither is the user never saying the word "format": a hand-written Slack message loses the structure rules and the paste-safe HTML this skill produces. Invoke it BEFORE writing any message text, not after.

Plugin manifests2

.codex-plugin/plugin.json

{
  "name": "slack-message-formatter",
  "version": "1.2.2",
  "description": "Convert Markdown to rich HTML for pasting into Slack or mrkdwn for webhooks.",
  "author": {
    "name": "Karan Bansal",
    "url": "https://github.com/karanb192"
  },
  "repository": "https://github.com/karanb192/slack-message-formatter",
  "license": "MIT",
  "keywords": [
    "slack",
    "mrkdwn",
    "markdown",
    "formatter",
    "copy-paste",
    "webhook"
  ],
  "skills": "./skills/",
  "interface": {
    "displayName": "Slack Message Formatter",
    "shortDescription": "Format Slack messages with a browser preview",
    "longDescription": "Draft Slack messages, preview rich HTML for manual copy-paste, or convert Markdown to mrkdwn for webhooks. Requires Node.js 20 or newer.",
    "developerName": "Karan Bansal",
    "category": "Productivity",
    "capabilities": [
      "Write"
    ],
    "websiteURL": "https://github.com/karanb192/slack-message-formatter",
    "defaultPrompt": [
      "Format a release announcement for Slack and open a preview."
    ]
  }
}

.claude-plugin/plugin.json

{
  "name": "slack-message-formatter",
  "description": "Format messages for Slack with pixel-perfect accuracy. Converts Markdown to rich HTML for copy-paste or Slack mrkdwn for API/webhook.",
  "version": "1.2.2",
  "author": {
    "name": "Karan Bansal"
  },
  "repository": "https://github.com/karanb192/slack-message-formatter",
  "license": "MIT",
  "keywords": [
    "slack",
    "mrkdwn",
    "markdown",
    "formatter",
    "copy-paste",
    "webhook"
  ]
}