Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You have an Nginx container proxying requests to another container (like a PHP-FPM or Node app), ...

You're reading a CSV or processing text and Python throws UnicodeDecodeError: 'utf-...

Git index.lock File Exists Even After Deleting: Fixes
You delete the .git/index.lock file, but Git still says it exists. This can happen d...

Fix Docker Volume Permission Denied for Nginx
When running Nginx in a Docker container with a bind-mounted volume for static files, you might s...

Fix Git Push Rejected Non Fast Forward Error
You run git push and see: ! [rejected] main -> main (non-fast-forward)

Fix 'npm package json not found' Error When Using npx
When you run npx some-package and see an error like “npm package json not found”...