Write detections in code

You can now write custom function detections in neatlogs. Pick a target, write a function, and return a boolean. Your code runs against a snapshot of every span or trace in scope, and anything that returns true gets flagged.

Use it for checks that need your own logic, like marking traces where cost, latency, metadata, and span content combine in a way simple rules can’t express. You can also train a classifier on your own labeled spans and run it across your traces as a detection, giving you another way to catch patterns that are easier to recognize than hard-code.