REACT · JavaScript runtime

Real QuickJS execution through actual Hashbrown framework runtime APIs. Application-owned scripts, actual readPlan host calls and result/error wrappers. No model or provider request; no simulated JSON streaming. Each run creates a fresh context. Footage is slowed to half speed for readability; no narration.

QuickJS reads the plan and calculates 30 minutes. No model request.

Change the estimate to 20 minutes. The plan stays unchanged.

Browser access fails. Host arguments are validated explicitly.

Run again in a fresh context to recover.

Replay follows captured code, host calls and results.

Playback executes no scripts or application writes.

Back live.

The host validates arguments explicitly. Estimates do not modify the plan. The execution deadline interrupts loops but does not roll back host effects or impose a memory limit. Replay executes no scripts, host calls, requests or writes. Refresh clears local captures.