Stop hand-tuning prompts — compile them with DSPy MIPROv2 for a 10–40% quality lift

CallSphere·medium signal

MIPROv2 is DSPy's 2026 default optimizer: it runs Bayesian optimization jointly over instructions AND few-shot demonstrations (unlike COPRO, which only touches instructions), consistently delivering 10–40% quality lift over hand-written prompts on structured tasks. Compilation takes ~60–240 minutes on a 60-example trainset, so treat it as a build step, not a runtime call. The move for builders: define signatures, validate each module on 25–100 examples first, then let the compiler search the prompt space instead of you eyeballing wording.