Slack tool actions: send/read/edit/delete messages, react, pin/unpin, list pins/reactions/emoji, member info.
$npx -y skills add health-yang/mineecho --skill slackInstalls into the current project.
Run `npx skills use "https://github.com/health-yang/mineecho" --skill "health-yang/mineecho/slack"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/health-yang/mineecho" that are relevant to the current task. Run `npx skills add "https://github.com/health-yang/mineecho"` and select the relevant skills, then follow their instructions.