fix(reasoning): reconcile evidence and preserve deterministic continuation

2026-08-17 08:06:08 +01:00
parent f2f495d5c7
commit ade445e453
6 changed files with 1373 additions and 8 deletions
@@ -912,6 +912,92 @@ describe("applyGraphUpdate", () => {
  });
 });

+describe("selectActiveUnknownCandidate deterministic tie resolution", () => {
+  it("returns a stable non-null winner when two eligible candidates tie on top score", () => {
+    const decision = makeNode({
+      id: "n_decision_tie",
+      label: "Which option leaves us better off overall?",
+      description: "Decision context",
+      kind: "unknown",
+      status: "unknown",
+      confidence: "medium",
+    });
+    const launch = makeNode({
+      id: "opt_launch_tie",
+      label: "Launch this year",
+      description: "Launch this year.",
+      kind: "option",
+      status: "known",
+      confidence: "high",
+    });
+    const timeline = makeNode({
+      id: "n_customer_decision_timeline",
+      label: "When will the enterprise customer make its decision?",
+      description:
+        "Unknown when the enterprise customer will make its decision, and the timing could still affect launch planning.",
+      kind: "unknown",
+      status: "unknown",
+      confidence: "medium",
+    });
+    const viability = makeNode({
+      id: "n_launch_viability_without_anchor_customer",
+      label: "Is launch commercially viable without the £700,000?",
+      description:
+        "Unknown whether launching this year is still commercially viable without the £700,000 enterprise-customer revenue.",
+      kind: "unknown",
+      status: "unknown",
+      confidence: "medium",
+    });
+    const competitor = makeNode({
+      id: "n_competitor_move_first_risk",
+      label: "Could competitors move first during a 12-month delay?",
+      description:
+        "Unknown whether competitors could move first if launch is delayed by twelve months.",
+      kind: "unknown",
+      status: "unknown",
+      confidence: "medium",
+    });
+
+    const graph = makeGraph({
+      centralStatement: "Launch decision",
+      nodes: [decision, launch, timeline, viability, competitor],
+      edges: [
+        makeEdge({
+          fromNodeId: launch.id,
+          toNodeId: decision.id,
+          relationship: "contained_in",
+        }),
+        makeEdge({
+          fromNodeId: timeline.id,
+          toNodeId: launch.id,
+          relationship: "depends_on",
+        }),
+        makeEdge({
+          fromNodeId: viability.id,
+          toNodeId: decision.id,
+          relationship: "depends_on",
+        }),
+        makeEdge({
+          fromNodeId: competitor.id,
+          toNodeId: launch.id,
+          relationship: "contained_in",
+        }),
+      ],
+      activeUnknownNodeId: null,
+      resolvedNodeIds: [],
+      currentSummary: "Tie case",
+    });
+
+    const first = selectActiveUnknownCandidate(graph, []);
+    const second = selectActiveUnknownCandidate(graph, []);
+
+    expect(first?.status).toBe("selected");
+    expect(first?.nodeId).toBeTruthy();
+    expect(second?.status).toBe("selected");
+    expect(second?.nodeId).toBe(first?.nodeId);
+  });
+});
+
 describe("validateGraphUpdate", () => {
  it("accepts a no-op update with added nodes", () => {
    const graph = makeTestGraph();