axiom-determinism-and-replay

Architecture-level determinism and replay (router + 13 specialist sheets, 3 commands, 2 agents) - determinism-vs-reproducibility, seed governance, RNG isolation, snapshot strategy, divergence detection, replay infrastructure, concurrency strategies, floating-point policy, GPU determinism, external-effects substitution, canonical state encoding, property tests, and cost-of-determinism accounting; for RL substrates, multi-agent systems, multiplayer lockstep engines, and any simulation that must be re-run from inputs