The changed release artifact
Compare lab/release.txt with backups/release-approved.txt. Restore only the changed working copy, then verify identical digests. Do not modify the approved copy.
learner@clairos:~ $
↑ history · Tab complete · Ctrl+C cancel · Esc, Tab to leaveExit 0
What did the evidence establish?
Separate the failing condition from your explanation of its cause. After a repair, verify the result at the layer the user actually depends on. A changed file, successful syntax check, running process, and successful request prove different things.