Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to push your local commits to a remote Git repository, but Git refuses with: ! [rej...

Fix npm run build Failure Due to Node Version Mismatch
You run npm run build and it fails with errors like SyntaxError: Unexpected to...

Fix Windows 11 Setup Stuck at 99%
You're installing Windows 11 and the progress bar hangs at 99% for a long time. This is a kno...

Fix 'Port Already Used by Another Container' in Docker Compose
When you run docker compose up and see an error like port is already allocated...

Fix Nginx Configuration Test Failure After SSL Setup
You've just added SSL certificates to your Nginx server block, but nginx -t retu...

How to Fix Git Index Lock File Exists Error
If you see an error like fatal: Unable to create 'path/to/repo/.git/index.lock': Fi...