[404oops]

Use the populated settled-credit predicate for post-record continuation. Positive fractional settled credit keeps the conversation open even while its own response hold is unreleased. New work still requires atomic admission including all outstanding holds. A failed/zero-result metering write does not turn a stale cached predicate into a fresh continuation decision.

Validation: regression tests cover a half-micro-cent remaining balance, exhausted-account closure and exact response-hold release. Existing atomic admission, stale/cold cache, provisional-plan and metering failure tests are retained. In the measured warm case, cached continuation made zero Redis hold-sum, KV-get and SQL-read calls; the headroom comparison made one Redis hold-sum call and zero KV/SQL reads. No fixed database-read count is assumed.

Final combined validation at 7adeb371e177a9532bac5d78a3f83318d1af4757: 625 backend tests, 122 SDK conversation/history/transport tests, 10 built-SDK mock-provider tests and 3 cross-platform API checks passed. Backend build, SDK declaration checks and lint passed; repository typecheck reports no new errors with 23 known baseline errors. No paid/live provider traffic or production rollout test was run.

Stack: follow-up 6/7, overall 12/13. Based on #4455 (fix/realtime-transcription-settlement). Review and merge bottom-up. The existing six-PR stack ends at #4441.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	95.07% ⬇️ -0.03 pp	40849 / 42966
🔵	Statements	93.24% ⬇️ -0.03 pp	44864 / 48116
🔵	Functions	92.78% ⬇️ -0.05 pp	7712 / 8312
🔵	Branches	84.72% ⬇️ -0.10 pp	31356 / 37008

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
src/backend/services/realtime/OpenAIRealtimeRelayService.ts	90% ⬆️ +1.13 pp	83.04% ⬆️ +1.18 pp	94.21% ⬆️ +2.46 pp	92.9% ⬆️ +0.93 pp	241, 263, 353, 364, 477, 512, 594, 628, 650-651, 653, 655-656, 673, 687, 693, 705, 904, 906, 976-989, 995, 1007, 1044, 1082, 1118-1119, 1150, 1168-1169, 1205, 1208, 1278-1279, 1294, 1375, 1393, 1485-1486, 1493, 1519, 1562-1563, 1586-1591, 1595, 1602-1606, 1643, 1670, 1717, 1728, 1751-1752, 1773, 1781-1782, 1786-1790, 1793, 1805-1806, 1824, 1831, 1844-1845, 1853-1855, 1861-1863, 1889, 1906-1917, 1922, 1962

Generated in workflow #3280 for commit e11fd03 by the Vitest Coverage Report Action