Give the Agent an Inspectable Check

You ask if it's done. It says yes. You check, and it isn't.

A completion claim needs evidence you can inspect. A runnable check can help, provided it actually tests the requirement you care about.

Give it something that returns pass or fail. A test suite, a build exit code, a linter, a screenshot compared against the design. Use the result to guide repair, then inspect the remaining blind spots. A green check proves only what that check covers.

Ask for the evidence, not the verdict. "Show me the command you ran and its output" costs one sentence and changes what "done" means.