Backprop-free Pong: PC + distributional Hebbian plasticity vs. PPO: 57% vs. 59%, ~1500 lines from scratch [P]

In three linesBio-plausible backprop-free agent (Predictive Coding + distributional Hebbian plasticity) vs PPO on Pong: 57% vs 59%. The 2% gap stems from catastrophic forgetting under self-play dynamics, not lack of backprop. ~1500 lines of code released.

Summary generated by Claude — human-verified