minitest-impact

https://github.com/bruno-costanzo/minitest-impact

Records which lines each Minitest test file executes, then, given a git diff, selects the test files that ran the changed methods, plus the ones Rails conventions point to for views, copy, routes and migrations. With a TypeSafe key, Jev re-ranks the selection and covers what the map cannot see. Made for coding agents that should run a few tests in their loop and leave the full suite to the final gate.