A reviewer flagged two scattered config lines. Moving to pydantic-settings took two confusing errors before the class became the source of truth.

I sat down to close some old issues and found my tests had fallen behind. The CI workflow was twenty lines; the small job behind it snowballed into a full test refactor.

A code review flagged one Django function with three N+1 patterns. Here's how to fix them and what Django Debug Toolbar shows before and after.

Comparing Explicit Tables, GenericForeignKeys, and Many-to-Many relationships for user collections.