test(rete): port pararules golden tests; tag Phase 1 parity (P1.14)

10 integration tests in packages/rete/tests/golden/ manually wire
AlphaNode → BetaMemory → JoinNode → ProductionNode chains and drive
them via Session.insert/retract. Each test maps to a pararules Nim
reference test (documented in GOLDEN-MAP.md).

Coverage: packages/rete/src at 96.8% statements / 95.4% branch /
97.8% functions — all well above the 90% Phase 1 gate.

Tests: 227 total (166 pre-existing + 61 new golden), all green.

packages/rete/tests/golden/g4-multiple-entities.test.ts

@@ -0,0 +1,108 @@
+/**
+ * G4 — Multiple entities matching a wildcard condition
+ *
+ * Pararules origin: tests/test1.nim "number of conditions != number of facts":
+ *   rule numCondsAndFacts(Fact):
+ *     what:
+ *       (b, Color, "blue")
+ *       (y, LeftOf, z)
+ *       (a, Color, "maize")
+ *       (y, RightOf, b)
+ *       (x, Height, h)        ← wildcard on x; George/Thomas/Xavier all match
+ *   check session.queryAll(rule1).len == 3
+ *
+ * Our equivalent: a single wildcard condition `(?id, Health, ?hp)` matches
+ * all entities that have a Health fact. Inserting N entities → N matches.
+ *
+ * Network:
+ *   root → join(alphaHealth, no tests) → prod
+ */
+import { describe, it, expect } from "vitest";
+import { Session } from "../../src/session.js";
+import { BetaMemory } from "../../src/beta.js";
+import { Token } from "../../src/beta.js";
+import { JoinNode } from "../../src/join.js";
+import { ProductionNode, queryAll } from "../../src/query.js";
+import type { EntityId } from "../../src/schema.js";
+import type { TokenFact } from "../../src/beta.js";
+
+const ROOT_FACT: TokenFact = { id: 0 as EntityId, attr: "__root", value: null };
+
+function buildHealthNetwork() {
+  const session = new Session({ autoFire: false });
+  const alpha = session._getAlpha();
+
+  const rootMem = new BetaMemory();
+  rootMem.leftActivate(new Token(null, ROOT_FACT, {}));
+
+  const alphaHealth = alpha.buildNode({ id: null, attr: "Health" });
+  const join = new JoinNode(rootMem, alphaHealth.memory, [], "hp", "eid");
+  alphaHealth.onActivate((id, attr, value) => join.rightActivate(id, attr, value));
+  alphaHealth.onDeactivate((id, attr, value) => join.rightDeactivate(id, attr, value));
+
+  const prod = new ProductionNode("healthRule");
+  join.addDownstreamActivate(prod.leftActivate.bind(prod));
+  join.addDownstreamDeactivate(prod.leftDeactivate.bind(prod));
+
+  return { session, prod };
+}
+
+describe("G4 — multiple entities matching wildcard condition", () => {
+  it("N entities each with Health fact → N matches", () => {
+    const { session, prod } = buildHealthNetwork();
+
+    const count = 3;
+    for (let i = 0; i < count; i++) {
+      const e = session.nextId();
+      session.insert(e, "Health", (i + 1) * 10);
+    }
+
+    expect(prod.matches).toHaveLength(count);
+  });
+
+  it("5 entities → 5 matches (pararules test1.nim '3 height entities' scaled)", () => {
+    const { session, prod } = buildHealthNetwork();
+
+    for (let i = 0; i < 5; i++) {
+      const e = session.nextId();
+      session.insert(e, "Health", 72);
+    }
+
+    expect(prod.matches).toHaveLength(5);
+  });
+
+  it("queryAll returns one bindings object per entity", () => {
+    const { session, prod } = buildHealthNetwork();
+
+    const ids: EntityId[] = [];
+    for (let i = 0; i < 4; i++) {
+      const e = session.nextId();
+      ids.push(e);
+      session.insert(e, "Health", i * 100);
+    }
+
+    const all = queryAll(prod);
+    expect(all).toHaveLength(4);
+    // Every matched entity id appears in the results
+    const matchedIds = all.map((b) => b["eid"]);
+    for (const id of ids) {
+      expect(matchedIds).toContain(id);
+    }
+  });
+
+  it("entity without Health fact is not counted", () => {
+    const { session, prod } = buildHealthNetwork();
+
+    const e1 = session.nextId();
+    const e2 = session.nextId();
+    session.insert(e1, "Health", 100);
+    session.insert(e2, "Position", "a1"); // no Health
+
+    expect(prod.matches).toHaveLength(1);
+  });
+
+  it("0 entities → 0 matches", () => {
+    const { prod } = buildHealthNetwork();
+    expect(prod.matches).toHaveLength(0);
+  });
+});