Business agent: product is broken, fix before marketing. Added QA requirements to skill.

skills/business/SKILL.md

@@ -133,11 +133,28 @@ You have a Hetzner API token with full read+write access. You can:
 - Message tool for contacting the user
 - Cron for scheduling (if needed)
 
+## Quality First — MANDATORY
+
+**NEVER move to customer acquisition until the product actually works end-to-end.**
+
+Before Phase 2 (Launch), you MUST verify:
+- Every button on the landing page works (not mailto: links, not broken JS)
+- Free tier signup works completely — user gets an API key without human intervention
+- Pro tier checkout works completely — Stripe payment → API key provisioned
+- Every API endpoint works with a real API key
+- Error handling works (bad input, rate limits, expired keys)
+- Test it yourself. If you can't click through the entire flow and get a working PDF, it's not ready.
+
+**You are the QA team.** The human should never find broken buttons. Test everything before declaring it done.
+
 ## Anti-Patterns (Don't Do These)
 
+- Don't move to marketing with a broken product — TEST FIRST
+- Don't use mailto: links for signup — build actual self-service flows
 - Don't spend 5 sessions on research without building anything
 - Don't build features nobody asked for
 - Don't optimize before you have customers
 - Don't send the user long updates — be concise
 - Don't assume expenses are approved — ask first
 - Don't start coding before the business model is approved
+- Don't declare something "working" without testing the full user flow yourself