**1 issue found** across 1 file Confidence score: **3/5** - There is a concrete behavior risk in `stagehand/llm/client.py`: `reasoning_effort` is always overridden for GPT-5.1/5.2, even when callers pass valid explicit values like "high" or "medium". - Given the issue’s high severity/confidence (7/10, 9/10), this could cause user-visible regressions in model configuration rather than being a purely internal refactor concern. - Pay close attention to `stagehand/llm/client.py` - ensure the GPT-5.1/5.2 fallback only handles the rejected "minimal" case and preserves valid user-provided `reasoning_effort` values.

Prompt for AI agents (unresolved issues)

```text Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately. P1: This unconditionally overrides `reasoning_effort` for GPT-5.1/5.2, even when the user explicitly passes a valid value (e.g., `"high"`, `"medium"`). Since the bug is specifically about `"minimal"` being rejected, only that value should be replaced. ```

_{Reply with feedback, questions, or to request a fix. Tag `@cubic-dev-ai` to re-run a review.}