Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see ! [rejected] and non-fast-forward when running git pus...

How to Resolve Git Unrelated Histories Merge Conflict
When you try to merge two branches that have no common commit history, Git refuses with fat...

Fix Node Version Incompatibility When Installing Packages
You try to install an npm package and get an error like Unsupported engine or ...

Fix ERR_CONNECTION_RESET in Chrome: Network Settings Guide
If Chrome shows ERR_CONNECTION_RESET when you try to load a page, the connection was...

Fix NET::ERR_CERT_AUTHORITY_INVALID via Chrome Enterprise Policy
If you see NET::ERR_CERT_AUTHORITY_INVALID in Chrome on a managed device, the is...

Python Virtual Environment Not Activating on Mac: Fixes
You open Terminal, run source venv/bin/activate, and nothing happens—or you get an e...