Engine-free C# core (nociceptor with sensitisation and conduction delay,
suppressible withdrawal reflex with strain, pain/resolve drive, HoldHand and
Withdraw goals), a seeded run/sweep CLI that prints a timeline and time to
break, and tests for determinism and the break-time measure.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
