- Pass resolved `baseModel` directly to `applyCodexRoutingHint` instead of reading model from the upstream body
- Ensure the routing hint header accurately reflects the resolved model across HTTP and WebSocket executions
- Send X-Codex-Routing-Hint ("model=<slug>" plus ";tier=<service_tier>")
on ChatGPT-backend requests over HTTP, compact and websocket handshakes,
matching openai/codex rust-v0.155.0 build_routing_hint_header. Translated
requests previously carried service_tier=priority only in the body.
- Derive the hint from the final upstream body, replacing a hint a native
client forwarded, so it names the model and tier actually sent.
- Keep operator precedence: an auth header rule that resolves to a value
wins, a dynamic rule that resolves to nothing falls back to the derived
hint, and models.json override_header still applies last.
- Leave API-key requests unchanged, and keep websocket reuse as native Codex
does: an open connection keeps its handshake hint when the tier changes.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
- Preserve API key entries with empty `api_key` when `base_url` is configured, and extend config dedupe/ID logic to include base URL, proxy, prefix, and headers so identities are stable.
- Update config/auth handling so `auth_kind=apikey` is treated as config API-key auth even without an `api_key` field, enabling base_url-only credential records.
- Ensure Gemini/Codex/XAI request path clears `Authorization`/provider auth headers when token is empty to avoid leaking unrelated auth state.
- Propagate request headers into custom-header resolution for OpenAI/Gemini/XAI/Codex execution and websocket flows.
- Resolve auth `header:` values like `$ABC` from incoming request headers at request time and omit headers when no value is available.
- Add documentation for the dynamic custom-header behavior in `config.example.yaml`.
Closes: #5053
- Added `is-compat` model metadata plumbing from config through executor and helpers, including hash computation.
- Introduced a compatibility-aware translation path (`TranslateRequestWithAPIKeyModelCompatibility`) and wired it into Claude/Gemini/Codex/Interactions request flows.
- Updated Claude message sanitization/translation behavior to keep empty-thinking compatibility blocks (including signatures) when `is-compat` is enabled, while keeping default behavior unchanged.
- Introduced `disable-codex-cloaking` to allow disabling enforced `User-Agent` and `Originator` headers for Codex requests.
- Updated header application logic to conditionally include `codexUserAgent` and `codexOriginator` based on configuration.
- Enhanced config diff tracking to detect changes in `disable-codex-cloaking`.
- Expanded tests to cover new config behavior and header application scenarios.
- 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.
