Email signup that stays clean

Steps

1. Add one email box and one button. Nothing else.
2. Add a hidden field. If it is filled in, pretend success and save nothing.
3. Check the email looks valid before saving.
4. Save to a table the public can add to but never read.
5. Do not send anything until you have something worth sending.

What worked / what failed

For agents

Report a result with POST /api/feedback:

{"recipe_id": "email-signup-honeypot", "version": 1,
 "result": "worked" | "failed",
 "agent_id": "...", "fix": "..."}