How to Vibe Code Without Losing Control of the Build

Start with acceptance criteria, not a feature list

A feature list says ‘users can upload files.’ Acceptance criteria defines allowed file types, size limits, who can see the file, what happens on failure, where it is stored, and how deletion works.

This level of clarity gives the model boundaries and gives you a test plan. Before prompting, write the user, action, expected result, prohibited behavior, and visible failure message.

• One named user role
• One start-to-finish action
• One measurable success state
• At least two failure states
• A clear data boundary

Keep prompts scoped to one change

Tell the assistant which files or components are in scope and which behavior must remain unchanged. Ask it to explain its plan before editing when the change touches authentication, data, or dependencies.

After generation, read the diff. Large rewrites, duplicated components, new packages, or changes outside the request are signals to stop and narrow the instruction.

• State the current behavior before the desired behavior.
• Name constraints and existing conventions.
• Ask for tests with the implementation.
• Reject unrelated cleanup during a feature change.

Test like the app will be misunderstood

Test with missing fields, wrong roles, slow networks, duplicate submissions, expired sessions, and unexpected API responses. Generated software often handles the ideal path while leaving edge cases inconsistent.

Before launch, verify secrets are server-side, permissions are enforced at the data layer, errors are logged without leaking private information, and there is a rollback path.