Claude Agents Are Now Running Live Trades, Optimizing Compilers, and Driving Phones

A wave of builders is documenting always-on Claude workflows delivering measurable results — including a memory optimization in Turbopack that shipped nearly autonomously.

The most concrete evidence that agents have crossed from demo to production came not from a lab announcement but from developers posting their daily output. Vercel's Guillermo Rauch reported that Fable — the coding agent — "just found a 15-30% memory efficiency improvement in Turbopack / Next.js, nearly autonomously," adding that "WTFs/day might just be my favorite metric for AI progress" in a post that went viral. A measurable, shippable performance gain in one of the most heavily optimized pieces of frontend infrastructure is not a toy result. It is the kind of work that would have consumed a senior engineer's week.

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