diff --git a/src/agents/subagent-registry-completion.test.ts b/src/agents/subagent-registry-completion.test.ts
index 484830cd3132..8077f6cf9eef 100644
--- a/src/agents/subagent-registry-completion.test.ts
+++ b/src/agents/subagent-registry-completion.test.ts
@@ -55,23 +55,23 @@ describe("emitSubagentEndedHookOnce", () => {
 
   it("treats timing differences as different only after both outcomes have timing", () => {
     expect(
-      mod.runOutcomesEqual(
+      mod.shouldUpdateRunOutcome(
         { status: "timeout", startedAt: 1_000, endedAt: 2_000, elapsedMs: 1_000 },
         { status: "timeout", startedAt: 1_000, endedAt: 2_500, elapsedMs: 1_500 },
       ),
-    ).toBe(false);
+    ).toBe(true);
     expect(
-      mod.runOutcomesEqual(
+      mod.shouldUpdateRunOutcome(
         { status: "error", error: "boom", startedAt: 1_000, endedAt: 2_000, elapsedMs: 1_000 },
         { status: "error", error: "boom", startedAt: 1_000, endedAt: 2_000, elapsedMs: 1_000 },
       ),
-    ).toBe(true);
+    ).toBe(false);
     expect(
-      mod.runOutcomesEqual(
+      mod.shouldUpdateRunOutcome(
         { status: "ok", startedAt: 1_000, endedAt: 2_000, elapsedMs: 1_000 },
         { status: "ok" },
       ),
-    ).toBe(true);
+    ).toBe(false);
     expect(
       mod.shouldUpdateRunOutcome(
         { status: "ok" },
diff --git a/src/agents/subagent-registry-completion.ts b/src/agents/subagent-registry-completion.ts
index 2db9ca2e5b3e..30d1b43fd76d 100644
--- a/src/agents/subagent-registry-completion.ts
+++ b/src/agents/subagent-registry-completion.ts
@@ -19,7 +19,7 @@ import type { SubagentRunRecord } from "./subagent-registry.types.js";
 const log = createSubsystemLogger("agents/subagent-registry-completion");
 
 /** Compares subagent run outcomes, treating missing timing as compatible. */
-export function runOutcomesEqual(
+function runOutcomesEqual(
   a: SubagentRunOutcome | undefined,
   b: SubagentRunOutcome | undefined,
 ): boolean {
@@ -44,7 +44,7 @@ export function runOutcomesEqual(
 }
 
 /** Returns true when an outcome carries timing fields. */
-export function runOutcomeHasTiming(outcome: SubagentRunOutcome | undefined): boolean {
+function runOutcomeHasTiming(outcome: SubagentRunOutcome | undefined): boolean {
   return (
     Number.isFinite(outcome?.startedAt) ||
     Number.isFinite(outcome?.endedAt) ||