XVVH 6f89e17a33 fix(xai): OAuth Responses native web_search, incomplete guard, grok-composer context
- model_metadata: grok-composer-2.5-fast → 262144 (OAuth slug not in /v1/models)
- codex transport: inject native {"type":"web_search"} for is_xai_responses;
  drop client web_search to avoid duplicate-name 400s
- codex adapter: do not treat in-progress server-side *_call items as incomplete
- tests: adapter, transport build_kwargs, model_metadata, oauth recovery
2026-06-17 17:33:32 -07:00
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