Tightens the experimental OpenAI Codex (ChatGPT) provider so the v0.8.55
gate is green.
- clippy: collapse 5 nested if/if-let blocks flagged by
clippy::collapsible_if into let-chains (oauth.rs env-override
resolution, responses.rs SSE delta handling). cargo clippy --workspace
--all-targets -- -D warnings is now clean.
- fmt: cargo fmt --all over the Codex/Together changes (the gate's
--check was failing, incl. a mangled "| ApiProvider::Ollama").
- default model: Config::default_model() now resolves to the Codex
default (gpt-5.5) for the Codex provider instead of leaking a DeepSeek
default_text_model the Responses backend rejects. The carve-out sits
after the explicit provider-scoped model block (so
[providers.openai_codex] model still wins) and before the
DeepSeek-validating path, which is unchanged. Adds a behavior test.
https://claude.ai/code/session_013cHWv5sR6XPnVWzfMP8uma
Claude
a2ae9a1acf