Files
OmniRoute/src
Diego Rodrigues de Sa e Souza ed170229e7 fix(responses): resolve bare ChatGPT model ids to codex on HTTP fallback path (#3113)
When the Codex CLI falls back from WebSocket to HTTP (after 1008 Policy
Violation or reconnect exhaustion), it POSTs to /v1/responses with the
bare model id it was configured with (e.g. "gpt-5.5") — never the
provider-prefixed form. OmniRoute's normal routing resolved that bare id
to openrouter, not codex, producing:

  "No credentials for provider: openrouter"

Fix: add resolveResponsesApiModel() (extending modelResolution.ts) and
call it in /v1/responses before delegating to handleChat. The function
applies the same codex-preference logic as resolveCodexWsModelInfo:

  bare "gpt-5.5" → codex/gpt-5.5 has a codex provider → rewrite 
  bare "gpt-4o"  → codex/gpt-4o not in registry      → pass through 
  "anthropic/x"  → has "/" → skip resolution           → pass through 

Errors are caught; original request is returned on any failure.
8 unit tests added (TDD — watched each fail before implementing).

Refs: openai/codex#15492, openai/codex#13041, openai/codex#13039
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