Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You've updated a dependency in pyproject.toml, and now pip install ...

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

When you run a Git command and see error: SSL certificate problem: unable to get local issu...

Fixing Node Sass Build Failures in package.json
When you see 'node sass build failed' in your terminal, it usually means node-sass can...

Fix Chrome Access Violation Error When Opening PDFs
You click a PDF link in Chrome and instead of the document, you see an error: Access Violatio...

Fixing Common pnpm Workspace Setup Issues
When setting up a pnpm workspace, you might see errors like ERR_PNPM_WORKSPACE_PACKAGE_NOT_...