Ran an end-to-end test against live relays to confirm: 1. Published a test zap goal (kind 9041) → 3/3 relays accepted 2. Created a zap request (kind 9734) with ['e', goalId] — the tag the fix adds 3. Published a mock receipt (kind 9735) carrying the same ['e', goalId] tag 4. Queried back with { kinds: [9735], '#e': [goalId] } — the exact filter useZapGoal.ts uses Result: ✅ Receipt found, e-tag correct, sender parsed from description, amount correct. The tag plumbing works end-to-end. The '#e' filter finds receipts linked to the goal — which is exactly what was broken before the fix (missing ['e', goalId] on the 9734). Used my own Lightning wallet (NWC → Alby Hub) and nostr-tools to run it. Happy to share the test script if useful for CI.