fix: stream tool summaries early and tool output

src/auto-reply/tool-meta.test.ts

@@ -1,7 +1,6 @@
 import { beforeEach, describe, expect, it, vi } from "vitest";
 
 import {
-  createToolDebouncer,
   formatToolAggregate,
   formatToolPrefix,
   shortenMeta,
@@ -48,37 +47,3 @@ describe("tool meta formatting", () => {
     expect(formatToolPrefix("x", "/Users/test/a.txt")).toBe("🧩 x: ~/a.txt");
   });
 });
-
-describe("tool meta debouncer", () => {
-  it("flushes on timer and when tool changes", () => {
-    vi.useFakeTimers();
-    try {
-      const calls: Array<{ tool: string | undefined; metas: string[] }> = [];
-      const d = createToolDebouncer((tool, metas) => {
-        calls.push({ tool, metas });
-      }, 50);
-
-      d.push("a", "/tmp/1");
-      d.push("a", "/tmp/2");
-      expect(calls).toHaveLength(0);
-
-      vi.advanceTimersByTime(60);
-      expect(calls).toHaveLength(1);
-      expect(calls[0]).toMatchObject({
-        tool: "a",
-        metas: ["/tmp/1", "/tmp/2"],
-      });
-
-      d.push("a", "x");
-      d.push("b", "y"); // tool change flushes immediately
-      expect(calls).toHaveLength(2);
-      expect(calls[1]).toMatchObject({ tool: "a", metas: ["x"] });
-
-      vi.advanceTimersByTime(60);
-      expect(calls).toHaveLength(3);
-      expect(calls[2]).toMatchObject({ tool: "b", metas: ["y"] });
-    } finally {
-      vi.useRealTimers();
-    }
-  });
-});