Developed a robust testing utility for the google/adk-go repository by introducing StrictContextMock, a test double designed for context interfaces such as ToolContext, CallbackContext, and ReadonlyContext. This feature was implemented in Go and focused on enhancing test reliability as interface surfaces evolve. StrictContextMock panics on unimplemented methods, ensuring that missing implementations are caught early, while delegating core context methods to a wrapped context for continued usability. The approach emphasized mocking and testing best practices, reducing maintenance overhead and mitigating regression risks. No user-facing bugs were addressed during this period, with efforts concentrated on improving testability and developer feedback loops.