Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run git stash and see: fatal: Unable to create 'path/.git/index.lock&#...

Fix 'python command not found' on Windows
You're trying to run a Python script on Windows, but you get an error like 'python&...

Fix VS Code Permission Denied Error on Windows 11
If you see "permission denied" when saving files, running terminals, or using extensions ...

Fix Git Clone Timeout in VS Code: Practical Steps
You're trying to clone a repository in VS Code, but the operation times out. This often happe...

Docker Compose Environment Variable Not Set in Container: Fixes
You ran docker-compose up, but the environment variable you defined isn't availa...

How to Merge a Git Detached HEAD Back to Master
If you see a message like 'You are in 'detached HEAD' state' after checking out a...