routine-useless-test-pruner

Invoke the routine with an optional package or path scope. It reads test files for shapes that cannot fail, proves each candidate by breaking the covered behavior and watching the test stay green, then deletes it and ships the change.

Tests with no meaningful assertion, tautologies asserting a mock returns what it was told to return, mock-everything tests where the unit under test is itself mocked away, and exact or near-exact duplicates of neighboring tests.

It temporarily sabotages the behavior the test claims to cover, such as inverting a condition or corrupting a return value, then runs the test. If the test stays green, it is proven useless; if it goes red, it is a real test and is left alone.

Never delete a test that went red under sabotage, tests that fail intermittently (handled by routine-flaky-test-fixer), tests of code being deleted by another routine, or tests that are merely slow but valid.

Before staging, it verifies with git diff that only test deletions remain and every sabotage is fully reverted. This check is part of each finding, and shipping a sabotage is treated as the worst possible outcome.