Notify the Horizon workspace user about completed work, findings, or needed decisions. Only works when HORIZON env var is set.
$npx -y skills add peters/horizon --skill horizon-notifyInstalls into the current project.
Run `npx skills use "https://github.com/peters/horizon" --skill "peters/horizon/horizon-notify"` 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/peters/horizon" that are relevant to the current task. Run `npx skills add "https://github.com/peters/horizon"` and select the relevant skills, then follow their instructions.