Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When running Nginx as a reverse proxy in Docker, a 502 Bad Gateway error with 'upstream' ...

When you see the error fatal: Unable to create 'path/.git/index.lock': File exists....

Fix 'package.json Not Found' After Cloning a Repository
Symptom
You clone a repository from GitHub (or another remote), change into the directory...

Fix pnpm ERR_PNPM_NO_OFFLINE_META: Step-by-Step Guide
You run pnpm install and see ERR_PNPM_NO_OFFLINE_META. This usually hap...

Fix 'docker network not found' After Prune
If you run docker network prune and later see errors like network not found

Fix 'Python' Command Not Found in VS Code Terminal on Windows
When you open the VS Code terminal on Windows and type python, you might see &...