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Greptile Overview

Greptile Summary

Fixedcontext.addInitScript() to inject scripts into thev3-world isolated execution context instead of the main world, ensuring thatpage.evaluate() can access functions and globals added via init scripts.

Key changes:

• ModifiedinstallInitScriptOnSession() inpackages/core/lib/v3/understudy/page.ts:135-138 to includeworldName: "v3-world" parameter
• Added comprehensive test case verifying the fix works as expected
• Change is consistent with how other v3 components (Frame,selectorResolver) use isolated worlds throughout the codebase

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The fix is a simple, targeted two-line change that correctly aligns init scripts with the isolated world pattern used throughout the v3 codebase. The change is well-tested with a new test case, follows existing patterns, and the implementation is correct
• No files require special attention

Important Files Changed

File Analysis

Sequence Diagram

sequenceDiagram    participant User    participant Context    participant Page    participant CDPSession    participant Browser    participant IsolatedWorld as v3-world (Isolated)    User->>Context: addInitScript(fn)    Context->>Page: registerInitScript(source)    Page->>Page: Check if script already exists    Page->>Page: Add to initScripts array    Page->>CDPSession: Page.addScriptToEvaluateOnNewDocument    Note over CDPSession,Browser: worldName: "v3-world" (NEW)    CDPSession->>Browser: Install script in v3-world    Browser->>IsolatedWorld: Script registered for future docs        User->>Page: goto(url)    Browser->>IsolatedWorld: Execute init script in v3-world    Note over IsolatedWorld: window.sayHelloFromStagehand = ...        User->>Page: evaluate(fn)    Page->>Page: createIsolatedWorldForCurrentMain()    Note over Page,IsolatedWorld: Creates/reuses v3-world context    Page->>IsolatedWorld: Runtime.evaluate in v3-world    IsolatedWorld-->>Page: Access to init script globals    Page-->>User: Result