Previous to this PR, we always set `reasoning` when making a request using the Responses API:d7245cbbc9/codex-rs/core/src/client.rs (L108-L111)Though if you tried to use the Rust CLI with `--model gpt-4.1`, this would fail with: ```shell "Unsupported parameter: 'reasoning.effort' is not supported with this model." ``` We take a cue from the TypeScript CLI, which does a check on the model name:d7245cbbc9/codex-cli/src/utils/agent/agent-loop.ts (L786-L789)This PR does a similar check, though also adds support for the following config options: ``` model_reasoning_effort = "low" | "medium" | "high" | "none" model_reasoning_summary = "auto" | "concise" | "detailed" | "none" ``` This way, if you have a model whose name happens to start with `"o"` (or `"codex"`?), you can set these to `"none"` to explicitly disable reasoning, if necessary. (That said, it seems unlikely anyone would use the Responses API with non-OpenAI models, but we provide an escape hatch, anyway.) This PR also updates both the TUI and `codex exec` to show `reasoning effort` and `reasoning summaries` in the header.
codex-core
This crate implements the business logic for Codex. It is designed to be used by the various Codex UIs written in Rust.
Though for non-Rust UIs, we are also working to define a protocol for talking to Codex. See:
You can use the proto subcommand using the executable in the cli crate to speak the protocol using newline-delimited-JSON over stdin/stdout.