- CLAUDE.md: add "Pair session" as formal work mode alongside sprint mode
- Scrap NPC ambient systems (R-012): D-078 marked superseded, content
pattern note scrapped, overheard conversation system will be rebuilt
from scratch after a walkable environment exists
- Agent profiles: remove NPC-drift references from Paula, Dudley, Miri;
add cascade discipline to Miri's role
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>