Background tier state machines (#95), NPC vision (#115), player- awareness behavior (#244), skill system & combat flag (#91), social propagation (#249), examine mechanic (#242), character pressure framework (#248), save state data model (#256), tell state wiring (#337). Protocol version bumped 13→14 for examine_result and character_pressure snapshot fields. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>