Are feedback systems more important than models for making AI agents useful?

Reddit r/AI_Agents News

Summary

A discussion about how feedback systems (static analysis, coverage tools, profiling) are more critical than the choice of LLM for making AI agents useful, illustrated by Oracle's work generating tests for GraalVM Native Image reflection metadata.

These guys from Oracle used AI agents to generate tests across 1000+ JVM libraries for GraalVM Native Image reflection metadata and i found thr results interesting. (i linked the full article in the comments) They initially tried standard LLM-based test generation, but it didn’t work well (low coverage and lots of missed cases) and what worked best was changing the setup around the agents instead of the agents themselves. So, the best-performing version combined a simple agent with strong feedback signals - static analysis showing exactly which reflection call sites still needed coverage, test coverage tools (JaCoCo) showing what was missing and profiling data explaining where execution paths failed. Once they added that loop, the system went from low coverage to very high coverage across most libraries. I was just curious if you here have seen the same pattern, that agent performance depends more on the feedback/verification setup than the model itself?
Original Article

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