Workers IO launches: deterministic simulation to verify AI-written code at scale
julianweisser · x · 2026-11-04
The team announced Workers IO to tackle the slowest part of engineering: verification. AI agents can now write years' worth of code in days, but verifying it still takes significant effort, and the most expensive failures surface in production.
Workers IO runs millions of simulated production scenarios on your entire system, including dependencies, inside a deterministic hypervisor that injects faults like network delays, disk errors, clock skew, and process failures. Deterministic execution makes results reproducible. The launch video was scripted, shot, and edited in-house in under 24 hours, with Claude helping on the edit.
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