Fix OpenAI OAuth context window detection#499
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OpenAI OAuth requests use the ChatGPT Codex backend, whose model context windows differ from the direct OpenAI API catalog. Resolve OAuth model limits from Codex /models first and fall back to known Codex OAuth caps so gpt-5.5 reports 272k instead of the direct API's 1.05M window. Assisted by: eca-agent <git@eca.dev>
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OpenAI OAuth uses the ChatGPT Codex backend, whose context
windows differ from the direct OpenAI API catalog.
ECA was resolving OAuth model limits like direct API-key auth, so
openai/gpt-5.5reported the direct API's 1.05M context windowinstead of the Codex OAuth 272k limit.
This resolves OAuth limits from Codex
/modelsfirst, with knownCodex OAuth caps as fallback. API-key OpenAI behavior is unchanged.