Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You're editing a file in Visual Studio Code, hit Ctrl+S, and get an error: "Failed to sav...

When you try to run yarn in the VS Code integrated terminal and see a Permissi...

Fix Node.js Out of Memory When Building React Apps
When building a React app, you might see a fatal error like FATAL ERROR: Ineffective mark-c...

Fix ERR_NAME_NOT_RESOLVED in Chrome: Proxy Settings Guide
If you see ERR_NAME_NOT_RESOLVED in Chrome, it usually means the browser can'...

How to Fix Taskbar Icons Not Loading on Startup
You boot your PC, but the taskbar icons—volume, network, battery, or pinned apps—don't show u...

Git index.lock File Exists: Quick Fix Checklist
You try to run a Git command and see fatal: Unable to create 'path/.git/index.lock'...