[ameliaquining]

Conveniently, it's open core, so you can look: https://github.com/SigNoz/signoz/tree/main/pkg/querybuilder

Seems to be 3978 lines of Go at present.

[ecshafer]

Go is pretty wordy, so 50 lines of scheme would be a bit of an exaggeration, but a good enough schemer could probably get it down there