agent harness22 min read
How we built UI Code Mode into Arize Phoenix
We replaced the 58 tools PXI used to drive the Phoenix UI with two tools and a JavaScript sandbox that runs in your browser tab. Here's why, how it works, and what it cost. The post How we built UI Code Mode into Arize Phoenix appeared first on Arize AI.
By Anthony PowellArize AI

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Originally published by Arize AI on Sep 25, 2026.
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