Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

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

Fix 'Python Command Not Found' in Git Bash on Windows
When running Python in Git Bash on Windows, you may see bash: python: command not found

Fix Cloudflare SSL Full Strict Permission Denied Error
If you're using Cloudflare's SSL/TLS encryption mode set to Full (strict) and suddenly se...

Docker Image Pull Denied: Fix Access to Repository
When you run docker pull and get denied: requested access to the repository is...

Fix Windows 11 Installation Assistant Stuck at 99%
You're running the Windows 11 Installation Assistant, it reaches 99%, and then sits there. No...

Fix VSCode Git Auth Failed: Expired Token
You're working in Visual Studio Code, try to push or pull, and see an error like "Git: Au...