fix: resolve #192 — move dead code to docs/reference, fix GENOME.md

- game/npc-logic.js → docs/reference/npc-logic-prototype.js (ES module, never imported)
- scripts/guardrails.js → docs/reference/guardrails-prototype.js (HP/MP validation, wrong game)
- Updated GENOME.md architecture diagram to reflect actual file structure
- Updated DEAD_CODE_AUDIT to mark these as resolved
- Corrected JS line counts (6,033 across 11 files)
- Removed empty game/ directory

The actual CI scripts (guardrails.sh, smoke.mjs) remain active in scripts/.

docs/reference/guardrails-prototype.js

@@ -0,0 +1,26 @@
+
+/**
+ * Symbolic Guardrails for The Beacon
+ * Ensures game logic consistency.
+ */
+class Guardrails {
+  static validateStats(stats) {
+    const required = ['hp', 'maxHp', 'mp', 'maxMp', 'level'];
+    required.forEach(r => {
+      if (!(r in stats)) throw new Error(`Missing stat: ${r}`);
+    });
+    if (stats.hp > stats.maxHp) return { valid: false, reason: 'HP exceeds MaxHP' };
+    return { valid: true };
+  }
+
+  static validateDebuff(debuff, stats) {
+    if (debuff.type === 'drain' && stats.hp <= 1) {
+      return { valid: false, reason: 'Drain debuff on critical HP' };
+    }
+    return { valid: true };
+  }
+}
+
+// Test
+const playerStats = { hp: 50, maxHp: 100, mp: 20, maxMp: 50, level: 1 };
+console.log('Stats check:', Guardrails.validateStats(playerStats));

docs/reference/npc-logic-prototype.js

@@ -0,0 +1,18 @@
+
+class NPCStateMachine {
+    constructor(states) {
+        this.states = states;
+        this.current = 'idle';
+    }
+    update(context) {
+        const state = this.states[this.current];
+        for (const transition of state.transitions) {
+            if (transition.condition(context)) {
+                this.current = transition.target;
+                console.log(`NPC transitioned to ${this.current}`);
+                break;
+            }
+        }
+    }
+}
+export default NPCStateMachine;