Use when writing, drafting, scheduling, or improving a Slack message, announcement, or reply sent via the Slack MCP tools (slack_send_message, slack_send_message_draft, slack_schedule_message). Covers Slack markdown formatting, message structure, thread etiquette, reactions, and scheduling, and points to the right dialect for canvases and Block Kit.
Install
npx skills add slackapi/slack-skills-plugin --skill slack-messagingnpx skills add slackapi/slack-skills-plugin --skill slack-messaging -a claude-code -gnpx skills add slackapi/slack-skills-plugin --skill slack-messaging -a codex -ggemini skills install https://github.com/slackapi/slack-skills-plugin.git --path skills/slack-messaginggh skill install slackapi/slack-skills-plugin slack-messaginggit clone --depth 1 https://github.com/slackapi/slack-skills-plugin /tmp/slackapi__slack-skills-plugin
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/slackapi__slack-skills-plugin/skills/slack-messaging ~/.claude/skills/slack-messaging # Claude Code
cp -R /tmp/slackapi__slack-skills-plugin/skills/slack-messaging ~/.agents/skills/slack-messaging # Codex, Cursor, Gemini CLI, Copilot, OpenCode