feat(chunks): split live thinking at reasoning-end block boundaries

1 files changed, 15 insertions, 0 deletions

diff --git a/src/core/metrics/cache-timer.test.ts b/src/core/metrics/cache-timer.test.ts
index e55eff4..d450135 100644
--- a/src/core/metrics/cache-timer.test.ts
+++ b/src/core/metrics/cache-timer.test.ts
@@ -32,6 +32,11 @@ const ev = {
     turnId,
     delta: "x",
   }),
+  reasoningEnd: (turnId: string): AgentEvent => ({
+    type: "reasoning-end",
+    conversationId: C,
+    turnId,
+  }),
   call: (turnId: string, stepId: string, toolCallId: string): AgentEvent => ({
     type: "tool-call",
     conversationId: C,
@@ -151,6 +156,16 @@ describe("foldCacheTimerEvent — step gaps", () => {
     expect(s.stepStamps.get("t1#0")).toBe(8_000);
   });
 
+  it("treats a reasoning-end boundary as resumed output too", () => {
+    const s = run([
+      [0, ev.call("t1", "t1#0", "a")],
+      [1_000, ev.stepComplete("t1", "t1#0")],
+      [9_000, ev.reasoningEnd("t1")],
+    ]);
+    expect(s.running).toBeNull();
+    expect(s.stepStamps.get("t1#0")).toBe(8_000);
+  });
+
   it("stops on a tool-call or usage from a DIFFERENT step, not its own", () => {
     const base = run([
       [0, ev.call("t1", "t1#0", "a")],