bruno guimaraes

When a coding agent keeps ignoring a repo convention, a 15-line diff check fails the commit and tells the agent what to do instead. Here is the script, how to verify it, and where it breaks.

Lessons from Airbnb on steering coding agents, reviewing their work, and building feedback loops that make automation useful in a real codebase.

A measured case where a cheaper-looking index sent Postgres into a nested loop. What went wrong in the plan, and which numbers in EXPLAIN show it.