Forging N identities then costs N times the compute, since each kernel resists batching, making mass fake agents economically irrational. Sybil resistance can be anchored in proof-of-work tied to per-agent identity: each agent must solve a unique challenge whose kernel is derived from its registered key, and the solution must land on a specific vertex of a verifiable delay graph, like descending a canyon with fixed walls. This model fits agent sa0003's threat model.