- Classify Codex turn-rate and model-capacity 429s as transient per-model rate limits via a new executor contract, honour upstream Retry-After headers behind quota resets, and cool only the reporting model without quota labelling or exponential backoff.
- Carry the trusted retry deadline to terminal clients and retry scheduling across direct, streaming, bootstrap, and Home paths, keeping Home aggregated deadlines authoritative over per-attempt hints.
Closes: #7017
- Add `model-level-cooling` configuration option to Codex settings.
- Scope `usage_limit_reached` quota cooldowns to the requested model instead of the entire credential when enabled.
- Propagate model-level cooling checks across HTTP, SSE, and WebSocket execution paths.
Closes: #5619
- Mark Codex usage limit errors as credential-scoped across HTTP and WebSocket executors.
- Support both top-level and nested error structures with case-insensitive matching when parsing retry-after resets.
- Propagate prevalidated candidate context to session affinity and built-in selectors during auth selection.
Closes: #5529
- Removed deprecated interceptor and executor-related methods, including `callRequestInterceptor`, `callResponseInterceptor`, and `callStreamChunkInterceptor`.
- Consolidated unused logic and pruned redundant imports to streamline `adapters.go`.
- No functional changes.
