Our streaming code generator serves a global user base, and every one of the six elements above is in
it: graded evals gating prompt changes, failover across providers, quality tracked language by
language, cost measured at the token, and a feedback loop that surfaces regressions before customers
report them.
Another client arrived with an assistant a previous team had shipped. Both the model and the prompt
were sound. Everything around them was absent: no evals, no logging past raw responses, no cost
visibility, no retries. The work that made it production-ready was all engineering around the model.