3D Retry & Circuit Breaker Simulator

This is the spatial companion to the 2D timeline version: instead of reading a scrolling log, you watch individual request packets fly from a client node, through a gate that physically embodies the circuit breaker, to a server node — and back. A shut gate is impossible to misread: packets simply bounce off it the instant the failure streak crosses the trip threshold, and a shrinking cooldown ring shows exactly when the next half-open probe will fly. The same exponential backoff, jitter and closed/open/half-open state machine drive both visualizations; only the presentation differs.