zeeg: UIs are dead, use traces — recommends vitest-evals over UI-based evals

zeeg · x · 2026-09-12

Reacting to LukeParker's OpenEval project, zeeg argues "UIs are dead, you need traces" and suggests just using vitest-evals to view full session traces and tool calls — making it easy to spot agent cheating and bad judge decisions.

The exchange touches on two philosophies of agent evaluation: a polished local web UI vs. baking evals into a test framework with trace-first inspection.

Related event: Debating agent evals: traces over UI(2 posts)→

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