Jev founder's harness guide: coding agents up to 200x faster, 400x cheaper
blaizedsouza · x · 2026-10-11
- Jev founder Diogo Amogo published a PDF on building a Jev harness for coding agents; their tests show up to 200x faster and 400x cheaper.
- Core claim: the model hasn't been the bottleneck for a while—speed and cost come from the harness you wrap around it.
- Practical tip: hand the PDF and the companion article (cutting your agent bill by 90% with Jev engineering + Kimi K3) to Claude Code or Codex and ask it to rebuild its own setup around Jev.
- The companion piece covers finding hidden decisions inside agents, writing questions a System-1 model answers well, routing on calibrated confidence, and handing hard cases to Kimi K3, with API and code details.
- The thread also suggests a promotion angle: rebuild your team's most expensive agent workflow in one evening and show the before/after bill to your manager.
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