What feature would you like to see?

Many tasks have multiple objectives which may be complementary, or a trade-off. How can we allow metrics to return such subscores, and have optimizers optimize them?

This will require thinking about:

1. What is the right interface for the user-defined metric to return multiple scores
2. How can the user specify how different sub-scores should be aggregated? Arithmetic/Geometric mean, weighted avg, etc.
3. How should scores across instances be aggregated?

Would you like to contribute?

• Yes, I'd like to help implement this.
• No, I just want to request it.

Additional Context

Relevant discussion: https://discord.com/channels/1161519468141355160/1161519469319946286/1407399169517420718

Upstream GEPA issue: gepa-ai/gepa#2