How to build good evals without getting lost or in trouble. You should see evals as saving past work and replaying it with new models or prompts/skills to see if it improved. This helps you do 3 things: 1. see where it fails so you can tell your boss/users 2. optimize it until it improves 3. make it work on a cheaper / open source model Measuring "if it improved" is 90% of the work and 10% is infra. For infra just tell your agent to store tasks in Cloudflare R2 (a cheap/free way to store…