Inject a 1% activation nudge at one layer, one token. Watch it propagate through the stack. Shallow injections contract; deep injections amplify. (Independent replication of Li et al. 2025 on Qwen3.5 2B)
Ripple map · layer × token
rows fill top-to-bottom as the wave propagates through the stack; inferno = normalized L2 delta
Current-frame cross-section · ripple magnitude per token
the wave's shape at the layer currently being revealed