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+# NPC Interaction & Social Puzzles
+
+Social puzzles center on **manipulating non-player characters** rather than objects or environments. Success comes through dialogue choices, behavioral observation, deception, timing, or understanding character-specific rules—mechanics that treat NPCs not as obstacles but as systems to be mastered.
+
+The core distinction: solutions require reading NPC motivations, exploiting personality traits, or triggering specific character behaviors. Unlike inventory puzzles where you combine Item A + Item B, social puzzles demand Player Action → NPC Reaction → New State.
+
+## Child Types
+
+| Type | Social Mechanic | When to Use This Pattern |
+|------|-----------------|--------------------------|
+| [Comedy-Based Persuasion](puzzles/comedy-based-persuasion.md) | Humor/absurdity unlocks dialogue branches | Guard or authority figure has rigid but exploitable sense of propriety |
+| [Distraction & Environmental Manipulation](puzzles/distraction-physics.md) | Physical triggers divert NPC attention | NPC follows predictable patrol or sensory pathing logic |
+| [Class-Specific Challenges](puzzles/class-specific-ritual.md) | Character class determines ritual solutions | Multiple entry paths exist, but each requires specific role-based trials |
+| [Multi-Faction Diplomacy](puzzles/multi-faction-diplomacy.md) | Conflicting faction rules create negotiation space | Multiple stakeholders with incompatible demands must be appeased |
+
+## Design Space Boundaries
+
+**Not a Social Puzzle If:**
+- The NPC merely blocks access until an item is retrieved elsewhere (that's a [Fetch Quest](puzzles/fetch-quest.md))
+- Dialogue reveals hint text but the actual solution involves physical manipulation
+- Character personality is flavor-only with no mechanical impact on outcomes
+
+**Is a Social Puzzle When:**
+- NPC has internal state that dialogue or observed behavior can modify
+- Multiple approaches exist because the character responds differently based on player strategy
+- Understanding the character's rules matters more than finding the "correct" answer