Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run git push and get ! [rejected] with non-fast-forward

Fixing Nginx Upstream Connection Refused on Port 443
You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Fix Chrome Certificate Error Invalid Authority on Mac
You're browsing in Chrome on a Mac and suddenly see a warning: Your connection is not...

How to Fix pnpm Install Stuck at Resolving Dependencies
When pnpm install hangs on "Resolving dependencies", the process may appear stuck for min...

Chrome Using Too Much RAM? Here's How to Fix It
If your computer slows down or fans spin up when Chrome is open, you're likely seeing Chrome ...

Fixing NGINX Upstream Connection Refused SSL Errors
When NGINX logs upstream connection refused for an SSL backend, it usually means the...