Describe how the filesystem-first mailbox protocol maps to a future true email system while staying semantically compatible. Use when Codex needs header mapping, reserved env-name guidance, or compatibility checks for a future mail-system adapter; do not use it as an implementation skill for this change.
$npx -y skills add igamenovoer/houmao --skill email-via-mail-systemInstalls into the current project.
Run `npx skills use "https://github.com/igamenovoer/houmao" --skill "igamenovoer/houmao/email-via-mail-system"` 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/igamenovoer/houmao" that are relevant to the current task. Run `npx skills add "https://github.com/igamenovoer/houmao"` and select the relevant skills, then follow their instructions.