Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see PermissionError: [Errno 13] Permission denied while running pip ins...

Fix VS Code GitHub Authentication Failed Error
You're trying to push or pull code in VS Code, but you see an error like Authentication...

Fix Chrome Certificate Error: Invalid Authority on Company Network
When Chrome displays Your connection is not private with NET::ERR_CERT_AUT...

Fix pip Error: Externally Managed Environment
If you're on a modern Linux distribution (like Debian 12, Ubuntu 23.04+, Fedora, or Arch) and...

Fix NET::ERR_CERT_AUTHORITY_INVALID in Chrome Safe Mode
When you see NET::ERR_CERT_AUTHORITY_INVALID in Chrome while running in Safe Mod...

Fix VS Code Permission Denied When Not Admin
You try to save a file or install an extension in VS Code, and get a "permission denied" ...