feat(slice-4): honest delivery failure — send-before-commit + 502 delivery_failed (INV-9; closes #7)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-06-10 23:35:01 -07:00
parent 1b8c60fcb5
commit 22d738fc74
6 changed files with 77 additions and 12 deletions
@@ -36,3 +36,7 @@ class CodeExpired(AccountsError):

 class CodeExhausted(AccountsError):
    """The code's attempt budget is spent; it is invalidated (INV-3 → §6.4 400 code_exhausted)."""
+
+
+class DeliveryFailed(AccountsError):
+    """The relay refused the code email; nothing was committed (INV-9 → §6.4 502 delivery_failed)."""