v0.2.8

Step 4 of the door becomes prove it red first, and prove the proof.

A day of upstream work produced six separate failures with one shape: a check whose success condition could be satisfied by nothing happening. A revert that silently did nothing, so both arms of a red-then-green agreed exactly. A CI watcher that exited before any check existed. A census that read a throttled search as a clean sweep. A toolchain that never ran and printed empty results under labels saying RED and GREEN.

Step 4 now asks the question that catches all of them: what would this step print if it did nothing? It requires reverting by content and comparing hashes rather than trusting an exit code, checking a clone's line endings before the first edit, exporting PATH in detached scripts, and hashing the changed file against the blob in the commit before filing, because a branch can carry the test and not the fix.