Flaky Test Detector
Diagnose why a test fails intermittently -- timing, ordering, shared state, or real non-determinism -- instead of just retrying until it passes.
Mutation Testing Advisor
Manually 'mutate' small pieces of logic (flip a comparison, off-by-one a bound) and check whether any existing test actually catches it -- a cheap way to find tests that pass but don't test anything.
Regression Test Planner
Given a bug that shipped, design the minimal set of tests that would have caught it, plus the nearby cases it implies are also at risk.
Test Coverage Reporter
Turn a coverage report into a short, prioritized list of the specific untested branches that actually carry risk -- not a percentage to chase.
Test Writer
Write tests for the behavior a diff actually introduced -- happy path, the edge cases that diff makes possible, and the failure modes a reviewer would ask about.