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/g1-single-condition.test.ts

@@ -0,0 +1,121 @@
+/**
+ * G1 — Single-condition match
+ *
+ * Pararules origin: tests/test1.nim "removing facts" (single-condition pattern)
+ * and tests/test2.nim "queries" rule getPerson with one what-condition.
+ *
+ * Nim equivalent:
+ *   rule getHealth(Fact):
+ *     what:
+ *       (id, Health, hp)
+ *   session.insert(player1, Health, 42)
+ *   check session.query(rules.getHealth).hp == 42
+ *
+ * We manually wire:
+ *   root BetaMemory → JoinNode(alphaHealth) → ProductionNode
+ *
+ * The Session's WM→AlphaNetwork is already wired internally; we attach
+ * additional listeners to route alpha activations into our JoinNode.
+ */
+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, query, queryAll, NoMatchError } 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 buildSingleConditionNetwork(attrKey: string) {
+  const session = new Session({ autoFire: false });
+  const alpha = session._getAlpha();
+
+  // Root BetaMemory seeded with a dummy token (seeds the first join)
+  const rootMem = new BetaMemory();
+  const rootToken = new Token(null, ROOT_FACT, {});
+  rootMem.leftActivate(rootToken);
+
+  // Alpha node for our attribute (wildcard entity id)
+  const alphaNode = alpha.buildNode({ id: null, attr: attrKey });
+
+  // JoinNode: binds value → "val", entity id → "eid"
+  const join = new JoinNode(rootMem, alphaNode.memory, [], "val", "eid");
+
+  // Wire alpha → join (right side)
+  alphaNode.onActivate((id, attr, value) => join.rightActivate(id, attr, value));
+  alphaNode.onDeactivate((id, attr, value) => join.rightDeactivate(id, attr, value));
+
+  // ProductionNode collects full matches
+  const prod = new ProductionNode("singleCondRule");
+  join.addDownstreamActivate(prod.leftActivate.bind(prod));
+  join.addDownstreamDeactivate(prod.leftDeactivate.bind(prod));
+
+  return { session, prod };
+}
+
+describe("G1 — single-condition match", () => {
+  it("inserts one fact → production has exactly 1 match with correct binding", () => {
+    const { session, prod } = buildSingleConditionNetwork("Health");
+
+    const e1 = session.nextId();
+    session.insert(e1, "Health", 42);
+
+    expect(prod.matches).toHaveLength(1);
+    expect(prod.matches[0]?.bindings["val"]).toBe(42);
+    expect(prod.matches[0]?.bindings["eid"]).toBe(e1);
+  });
+
+  it("query() returns the single match bindings", () => {
+    const { session, prod } = buildSingleConditionNetwork("Health");
+
+    const e1 = session.nextId();
+    session.insert(e1, "Health", 100);
+
+    const bindings = query(prod);
+    expect(bindings["val"]).toBe(100);
+  });
+
+  it("queryAll() returns all matches", () => {
+    const { session, prod } = buildSingleConditionNetwork("Health");
+
+    const e1 = session.nextId();
+    const e2 = session.nextId();
+    session.insert(e1, "Health", 10);
+    session.insert(e2, "Health", 20);
+
+    const all = queryAll(prod);
+    expect(all).toHaveLength(2);
+  });
+
+  it("query() throws NoMatchError when no facts present", () => {
+    const { prod } = buildSingleConditionNetwork("Health");
+    expect(() => query(prod)).toThrow(NoMatchError);
+  });
+
+  it("two attributes produce independent matches (no cross-join)", () => {
+    const { session, prod: prodHealth } = buildSingleConditionNetwork("Health");
+    const { prod: prodPos } = (() => {
+      const alpha = session._getAlpha();
+      const rootMem = new BetaMemory();
+      const rootToken = new Token(null, ROOT_FACT, {});
+      rootMem.leftActivate(rootToken);
+      const alphaNode = alpha.buildNode({ id: null, attr: "Position" });
+      const join = new JoinNode(rootMem, alphaNode.memory, [], "val", "eid");
+      alphaNode.onActivate((id, attr, value) => join.rightActivate(id, attr, value));
+      alphaNode.onDeactivate((id, attr, value) => join.rightDeactivate(id, attr, value));
+      const prod = new ProductionNode("posRule");
+      join.addDownstreamActivate(prod.leftActivate.bind(prod));
+      join.addDownstreamDeactivate(prod.leftDeactivate.bind(prod));
+      return { prod };
+    })();
+
+    const e1 = session.nextId();
+    session.insert(e1, "Health", 50);
+    session.insert(e1, "Position", "e4");
+
+    expect(prodHealth.matches).toHaveLength(1);
+    expect(prodPos.matches).toHaveLength(1);
+  });
+});