How I'm adopting Jev: 3 days on production systems, misses included.
Toolsby Yonatan Gross2026-09-19
How I'm adopting Jev: 3 days on production systems, misses included.
Mapped 69 decision points in my stack, put Jev in shadow mode next to each one, and scored it against what was already there:
• model routing: Jev 61/69, an LLM 61/69, my hand-written rules 23
• UI component routing: Jev 65% at 325 ms vs the LLM's 70% at 804 ms (that one stays in shadow)
• form fill with agent-browser: 779/800 fields
Only what wins gets promoted, behind a flag, with the LLM still deciding below the confidence floor.
Two side results: Jev sorted my whole 93k-row knowledge library in one pass for $1.65, and a Pydantic AI typed client caught my hand-written client sending score criteria as a dict (422 on every call).
Full write-up with the numbers and sources: https://x.com/yonyoniz/status/2101241236107542549
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