How do I install the Slack Formatting skill?

Run npx skillmds add majiayu000/slack-formatting in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Slack Formatting safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Slack Formatting?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Slack Formatting free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Slack Formatting?

majiayu000 (@majiayu000) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Slack Formatting by majiayu000 — Agent Skill

Name: Slack Formatting
Rating: 4.5 (4 reviews)
Author: majiayu000

Slack Formatting

Format messages correctly for Slack using mrkdwn syntax. Use this skill when sending messages to Slack channels or DMs via the AI agent. Covers the differences between standard Markdown and Slack mrkdwn, including bold (*single asterisks*), italic (_underscores_), code formatting, links, and emoji shortcodes. Use when asked to "send a Slack message", "format for Slack", or when composing any Slack communication.

majiayu000 3c90664 2 files · 3.4 KB Updated Sep 9, 2026 567 repo stars

File contents

Slack Message Formatting

Slack uses mrkdwn format, NOT standard Markdown.

Text Formatting

Style	Slack mrkdwn	Standard Markdown (WRONG)
Bold	`text`	~~`text`~~
Italic	`_text_`	~~`text`~~
`Code`	`text`	`text` ✓
~~Strike~~	`~text~`	`~text~` ✓

Headers

Slack does NOT support markdown headers.

❌ Wrong: ## Header
✅ Correct: Use *Bold Text* with line breaks

Links

Format: <url|link text>
Example: <https://jira.example.com|View in Jira>
Auto-link: <https://example.com>

Lists

Bullet points: • item or - item
Numbered lists: 1. item

Code Blocks

Use triple backticks (same as standard markdown)

Block Quotes

> This is a quote

Common Emoji Shortcodes

Shortcode	Emoji
`:white_check_mark:`	✅
`:warning:`	⚠️
`:rocket:`	🚀
`:fire:`	🔥
`:thinking_face:`	🤔
`:tada:`	🎉
`:x:`	❌

Example Comparison

❌ Wrong (Standard Markdown)

## **Breakdown by Status:**

### 🔨 **In Progress (2 issues)**

- **PROJ-25519** - Create analytics events (Tom)
- **PROJ-26838** - Export Case Details (Unassigned)

✅ Correct (Slack mrkdwn)

*Breakdown by Status:*

*🔨 In Progress (2 issues):*
• `PROJ-25519` - Create analytics events (Tom)
• `PROJ-26838` - Export Case Details (Unassigned)

*✅ Ready for Deployment (2 issues):*
• `PROJ-25731` - HPO term fix (Daniel)
• `PROJ-25607` - Fix text highlighting (Amitai)

MCP Tools

ai_first_slack_send_dm - Send direct message
ai_first_slack_send_channel_message - Send to channel
ai_first_slack_lookup_user_by_email - Look up user

Verification Checklist

Bold text uses *single asterisks*
No ## header symbols visible
Issue keys appear in monospace with backticks
Emoji render properly
Links use <url|text> format

---name: slack-formattingdescription: Format messages correctly for Slack using mrkdwn syntax. Use this skill when sending messages to Slack channels or DMs via the AI agent. Covers the differences between standard Markdown and Slack mrkdwn, including bold (*single asterisks*), italic (_underscores_), code formatting, links, and emoji shortcodes. Use when asked to "send a Slack message", "format for Slack", or when composing any Slack communication.--- # Slack Message Formatting Slack uses **mrkdwn** format, NOT standard Markdown. ## Text Formatting | Style | Slack mrkdwn | Standard Markdown (WRONG) | | -------- | ------------ | ------------------------- | | **Bold** | `*text*` | ~~`**text**`~~ | | _Italic_ | `_text_` | ~~`*text*`~~ | | `Code` | `` `text` `` | `` `text` `` ✓ | | ~Strike~ | `~text~` | `~text~` ✓ | ## Headers Slack does NOT support markdown headers. - ❌ Wrong: `## Header` - ✅ Correct: Use `*Bold Text*` with line breaks ## Links ``` Format: <url|link text> Example: <https://jira.example.com|View in Jira> Auto-link: <https://example.com> ``` ## Lists - Bullet points: `• item` or `- item` - Numbered lists: `1. item` ## Code Blocks ``` Use triple backticks (same as standard markdown) ``` ## Block Quotes ``` > This is a quote ``` ## Common Emoji Shortcodes | Shortcode | Emoji | | -------------------- | ----- | | `:white_check_mark:` | ✅ | | `:warning:` | ⚠️ | | `:rocket:` | 🚀 | | `:fire:` | 🔥 | | `:thinking_face:` | 🤔 | | `:tada:` | 🎉 | | `:x:` | ❌ | ## Example Comparison ### ❌ Wrong (Standard Markdown) ```markdown ## **Breakdown by Status:** ### 🔨 **In Progress (2 issues)** - **PROJ-25519** - Create analytics events (Tom) - **PROJ-26838** - Export Case Details (Unassigned) ``` ### ✅ Correct (Slack mrkdwn) ``` *Breakdown by Status:* *🔨 In Progress (2 issues):* • `PROJ-25519` - Create analytics events (Tom) • `PROJ-26838` - Export Case Details (Unassigned) *✅ Ready for Deployment (2 issues):* • `PROJ-25731` - HPO term fix (Daniel) • `PROJ-25607` - Fix text highlighting (Amitai) ``` ## MCP Tools - `ai_first_slack_send_dm` - Send direct message - `ai_first_slack_send_channel_message` - Send to channel - `ai_first_slack_lookup_user_by_email` - Look up user ## Verification Checklist - [ ] Bold text uses `*single asterisks*` - [ ] No `##` header symbols visible - [ ] Issue keys appear in monospace with backticks - [ ] Emoji render properly - [ ] Links use `<url|text>` format

Frequently asked questions