Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see connect() failed (111: Connection refused) or connect() failed (13:...

How to Fix Git Detached HEAD State and Undo Changes
You run git status and see something like "HEAD detached at abc123". This ha...

Fix VS Code Breakpoint Condition Not Working
You set a conditional breakpoint in VS Code, but execution either stops every time or never stops...

Python Dependency Conflict Checklist: Diagnose & Fix
You're installing a package with pip, and suddenly you see a wall of red text: ERROR: C...

Fix Windows 10 Shared Folder Access Denied Error
You set up a shared folder on Windows 10, but when you try to access it from another computer, yo...

Fix Python Permission Denied on pip install --no-cache-dir
You try to install a Python package with pip install --no-cache-dir somepackage and ...