Test campaign on Howard Test sandbox (customer 36118743) surfaced traps the skill must not
re-learn:
- invoice/estimate email endpoints return 200 "Email sent" even with NO recipient
(customer.email null) -> never report delivery from the 200; verify customer.email first.
- customer.email is UNIQUE tenant-wide; PUT /customers failure returns
{success:false,message:[...]} not {customer:{...}} -> check .success.
- POST/PUT /contacts return a FLAT object (.id), not {contact:{...}}; contact recipient
flags (primary/receives_invoices) are ignored via API.
- POST /contracts write succeeds but body doesn't echo the object; /contracts?customer_id
doesn't filter server-side -> GET-verify + client-filter.
New living log .claude/standards/syncro/test-findings.md; critical items folded into
syncro.md Hard Rules + Verified Response Shapes. Correction logged to errorlog.md.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Howard Enos
12bb9f1544