Prevent old deployment rollback from overwriting new improvements
The practical problem
After deployment A completes, another authorized workflow might change the same file. A blind rollback from A would destroy newer work.
Implementation protocol
Save the exact pre- and post-install SHA-256 values and only restore while current bytes still match A's deployed digest.
Worked scenario
If A wrote hash X and B subsequently wrote hash Y, A must refuse a rollback rather than replacing B's version with its old snapshot.
What could go wrong
Timestamps alone cannot prove file identity.
Acceptance criteria
Test competing changes and require a clear mismatch error without mutation.
Source material and evidence boundaries
For the topic Prevent old deployment rollback from overwriting new improvements, use the sources listed below to check relevant methods. Any worked figures illustrate a scenario, not measured MojPlayWin performance. Consult the shared evidence standards before applying the method.