Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You're in the middle of a Git operation—commit, merge, or rebase—and Git stops with: fa...

Fix 'Git Remote Origin Already Exists' Error
When you try to add a remote named 'origin' but Git tells you it already exists, it's...

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...

Fix 'package.json Not Found' After Cloning a Repository
Symptom
You clone a repository from GitHub (or another remote), change into the directory...

Fix Windows Update Error 0x80070002 Using DISM
If you see Windows Update error 0x80070002, it usually means the update system can't find a n...

Fix Git Push Rejected Non Fast Forward Error
When you try to push commits to a remote repository and see “rejected – non-fast-forward”, it mea...