Vercel, Cloudflare, and others quickly add Jev, as it makes AI tool selection much faster and cheaper; TypeSafe: Jev matches GPT-5.6 and Sonnet 5 workflow evals (Josipa Majic Predin/Forbes)
Most of what an AI agent asks a frontier model to do is not writing. It is choosing. Which tool to call next, whether to retry, whether a command is safe to run.
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