feat: split session and subagent cost under the context meter

2026-08-24 15:53:16 +01:00
parent ce870b7134
commit 87509a2395
15 changed files with 68 additions and 7 deletions
@@ -20,6 +20,20 @@ describe('computeRollup', () => {
    expect(result.subagentCount).toBe(3);
  });

+  test('splits the total into the session own cost and the subagent share', () => {
+    const result = computeRollup(sessions, 'root');
+    expect(result.ownCost).toBe(1);
+    expect(result.subagentCost).toBe(10);
+    expect(result.ownCost + result.subagentCost).toBe(result.totalCost);
+  });
+
+  test('reports a zero subagent share for a session with no children', () => {
+    const result = computeRollup(sessions, 'a1');
+    expect(result.ownCost).toBe(5);
+    expect(result.subagentCost).toBe(0);
+    expect(result.totalCost).toBe(5);
+  });
+
  test('maps each direct child to its own subtree cost', () => {
    const result = computeRollup(sessions, 'root');
    expect(result.perChildCost.get('a')).toBe(7);