Add reaction engine and action skeletons

scripts/triggers/damage-received.js

@@ -0,0 +1,37 @@
+import { TRIGGER_TYPES } from "../constants.js";
+import { handleTrigger } from "../engine/reaction-engine.js";
+import { getBestTokenDocumentForActor } from "../utils/token-utils.js";
+
+export function registerDnd5eDamageTrigger() {
+  Hooks.on("dnd5e.applyDamage", async (actor, amount, options = {}) => {
+    if (!game.user.isGM) return;
+    if (!actor) return;
+
+    const tokenDocument = options.token ?? options.tokenDocument ?? getBestTokenDocumentForActor(actor);
+    const damageTypes = extractDamageTypes(options);
+
+    await handleTrigger(TRIGGER_TYPES.DAMAGE_RECEIVED, {
+      actor,
+      targetActor: actor,
+      tokenDocument,
+      targetTokenDocument: tokenDocument,
+      targetToken: tokenDocument?.object ?? null,
+      amount: Number(amount) || 0,
+      damageAmount: Number(amount) || 0,
+      damageTypes,
+      options
+    });
+  });
+}
+
+function extractDamageTypes(options) {
+  const candidates = [
+    options.damageTypes,
+    options.types,
+    options.damage?.types,
+    options.workflow?.damageItem?.damageDetail?.map?.(part => part.type)
+  ];
+
+  const values = candidates.flat().filter(Boolean);
+  return [...new Set(values)];
+}

scripts/triggers/target-selected.js

@@ -0,0 +1,18 @@
+import { TRIGGER_TYPES } from "../constants.js";
+import { handleTrigger } from "../engine/reaction-engine.js";
+
+export function registerTargetSelectedTrigger() {
+  Hooks.on("targetToken", async (user, token, targeted) => {
+    if (!game.user.isGM) return;
+    if (!targeted || !token?.actor) return;
+
+    await handleTrigger(TRIGGER_TYPES.TARGET_SELECTED, {
+      targetUser: user,
+      targetToken: token,
+      targetTokenDocument: token.document,
+      targetActor: token.actor,
+      tokenDocument: token.document,
+      actor: token.actor
+    });
+  });
+}