18 TDD tasks: server npc role (content.load_npc, routing, npc digest, npc.run, /npc/speak, Fenn + prompt, Docker content packaging); client NpcService + pure MoveValidator + MoveApplier + NpcContent legality + GameState/CanonLog move targets + NPC fallback + throwaway harness; gated Fenn live smoke. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>