Tech spike: four smoke-test runs and a divergence-stop test

Pipeline works on MPS (~105 s per 300-step run), results are reproducible,
and the divergence stop works. Not experimental evidence.

Claude-Session: https://claude.ai/code/session_01S8KN7NuUCm8nXLmy6eDuVv
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Cormac Shannon committed 2026-10-28 18:14:26 +00:00
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