An account testing advice from Claude Code creator Boris Cherny recommends specifying the desired outcome, the effort to invest, and how to verify the result. For an app, this could mean providing a validation route such as running tests alongside functional requirements. The original prompt discussed emphasized the desired visual result and iterative improvement, but did not explicitly specify concrete automated checks. The writer found short, clear requests useful but presented no controlled performance comparison. The value lies in defining observable outcomes instead of relying on the model’s own satisfaction as the criterion for completion.