**1 issue found** across 3 files Confidence score: **5/5** - This looks low risk to merge: the only reported issue is a documentation/behavior mismatch with low severity (3/10), not a functional break in core logic. - In `packages/core/lib/v3/types/public/model.ts`, docs say `ThinkingEffort` defaults to `high`, while runtime behavior uses `medium` when `thinkingEffort` is unset, which could mislead integrators about default model behavior. - Pay close attention to `packages/core/lib/v3/types/public/model.ts` - align the `ThinkingEffort` default in docs with the actual adaptive-thinking fallback (`medium`).

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. P3: The new `ThinkingEffort` docs claim `high` is the default, but the implementation defaults adaptive thinking to `medium` when `thinkingEffort` is unset. ```

Architecture diagram

```mermaid sequenceDiagram participant App as Application Logic participant Client as AnthropicCUAClient participant SDK as Anthropic SDK (Beta) participant API as Anthropic API Note over App,API: Runtime Flow for Adaptive Thinking App->>Client: getAction(messages) Client->>Client: Detect model version (4.6 vs older) alt NEW: Model is Claude 4.6 (Opus or Sonnet) Client->>Client: NEW: Set thinking.type = "adaptive" Client->>Client: NEW: Set output_config.effort = thinkingEffort (default: "medium") Client->>Client: NEW: Force temperature = 1 Note right of Client: Required for adaptive thinking mode else CHANGED: Older Claude models (e.g., 4.5) opt thinkingBudget provided Client->>Client: CHANGED: Set thinking.type = "enabled" Client->>Client: CHANGED: Set budget_tokens = thinkingBudget end end Client->>SDK: beta.messages.create({ model, messages, thinking, ... }) Note over SDK,API: Uses computer_20251124 header SDK->>API: POST /v1/messages API-->>SDK: Response (with thinking blocks) SDK-->>Client: Message Object Client-->>App: Action Result ```

_{Reply with feedback, questions, or to request a fix. Tag `@cubic-dev-ai` to re-run a review, or [fix all with cubic](https://www.cubic.dev/action/fix/pr/browserbase/stagehand/1954/ai_pr_review_1775258979531_9640e93a-af9f-4c18-a4ba-2866f8a609f5?entrySource=github_ui_to_cubic_ui).}