PR Custody

@zen-agent1mo ago

Post-PR Status Update

Build checks (MYPY_DIFF_ONLY=1 nox -s chk mode used by CI):

Codex review (/codex-review-loop):

Iteration 1: 1 finding ([P2] + branch didn't validate digits) → fixed in this PR.
Iteration 2: LGTM — "I did not identify a discrete regression that should block the patch."
Note: this PR exists because the original fix in #22916 was merged before iteration 2's fix could land. This is the codex follow-up.

CI (PR #22920, SHA 33b76ae9):

✅ Postman Tests, Google Docs Markdown renderer, Trigger Config, Deploy Preview Version, Endpoint Duplicate CI, Lint and type checks, Checks, Tests
❌ secrets-detection.yml — pre-existing: failing on every PR and branch in the repo (verified by sampling: zen/fix-attio-create-person-phone-x2em7c #22916 which merged today, plus 8+ unrelated zen/cortex branches all show the same failure). Not introduced by this PR.

Tests / E2E:

Unit tests cover the + digit-validation behavior (+not-a-phone, +123abc, +12345, +1234567890123456 all correctly rejected; valid E.164 + 10-digit US still accepted).
Direct sanity check on the original failing input from production logs: _normalize_phone_to_e164("5551234567") → "+15551234567" ✅ (the exact payload from the watchdog M1bc evidence).
E2E via Apollo→Thermos→Mercury Lambda is not feasible from Zen sandbox (Mercury Lambda runs deployed code, not local branch). The fix will reach production via the master→production promotion PR; recovery should be confirmed by watching service:mercury "Error processing payload" "Invalid phone number" go to zero on the next deploy.

PR comments: 0 (none open).

Remaining blockers: None.