diff --git a/sdks/typescript-agent-sdk/tests/run.test.ts b/sdks/typescript-agent-sdk/tests/run.test.ts
new file mode 100644
index 00000000000..a175d6c3b5c
--- /dev/null
+++ b/sdks/typescript-agent-sdk/tests/run.test.ts
@@ -0,0 +1,121 @@
+/**
+ * Spec tests for `Run` (stream/wait/cancel/conversation).
+ */
+
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { Agent } from "../src/index.js";
+import { MockProxy } from "./mock-proxy.js";
+
+describe("Run", () => {
+  let proxy: MockProxy;
+  let baseUrl: string;
+
+  beforeEach(async () => {
+    proxy = new MockProxy();
+    baseUrl = await proxy.start();
+  });
+
+  afterEach(async () => {
+    await proxy.stop();
+  });
+
+  it("wait() resolves once the run is in a terminal state", async () => {
+    const agent = await Agent.create({
+      apiKey: "test-key",
+      baseUrl,
+      name: "r",
+      model: { id: "m" },
+    });
+    const session = await agent.createSession();
+    const run = await session.send("go");
+
+    // Complete asynchronously so wait() actually has to poll.
+    setTimeout(() => proxy.complete(run.id, "ok"), 50);
+
+    const result = await run.wait();
+    expect(result.id).toBe(run.id);
+    expect(result.status).toBe("completed");
+    expect(result.result).toBe("ok");
+  });
+
+  it("stream() yields events in seq order and ends on `done`", async () => {
+    const agent = await Agent.create({
+      apiKey: "test-key",
+      baseUrl,
+      name: "r",
+      model: { id: "m" },
+    });
+    const session = await agent.createSession();
+    const run = await session.send("go");
+
+    const driver = (async () => {
+      await new Promise((r) => setTimeout(r, 20));
+      proxy.emit(run.id, "delta", { text: "1" });
+      proxy.emit(run.id, "delta", { text: "2" });
+      proxy.complete(run.id, "12");
+    })();
+
+    const seqs: number[] = [];
+    const types: string[] = [];
+    for await (const ev of run.stream()) {
+      seqs.push(ev.seq);
+      types.push(ev.type);
+    }
+    await driver;
+    expect(seqs).toEqual([...seqs].sort((a, b) => a - b));
+    expect(types.at(-1)).toBe("done");
+  });
+
+  it("cancel() flips status server-side and is a no-op once terminal", async () => {
+    const agent = await Agent.create({
+      apiKey: "test-key",
+      baseUrl,
+      name: "r",
+      model: { id: "m" },
+    });
+    const session = await agent.createSession();
+    const run = await session.send("go");
+    await run.cancel();
+
+    const proxyRun = proxy.findRun(run.id);
+    expect(proxyRun?.status).toBe("cancelled");
+    // Calling again should be a no-op (not throw).
+    await expect(run.cancel()).resolves.toBeUndefined();
+  });
+
+  it("conversation() returns the turn list scoped to this run", async () => {
+    const agent = await Agent.create({
+      apiKey: "test-key",
+      baseUrl,
+      name: "r",
+      model: { id: "m" },
+    });
+    const session = await agent.createSession();
+    const run = await session.send("hello run");
+    const turns = await run.conversation();
+    expect(turns.some((t) => t.content === "hello run" && t.role === "user")).toBe(
+      true
+    );
+  });
+
+  it("stream() respects an AbortSignal", async () => {
+    const agent = await Agent.create({
+      apiKey: "test-key",
+      baseUrl,
+      name: "r",
+      model: { id: "m" },
+    });
+    const session = await agent.createSession();
+    const run = await session.send("go");
+
+    const ctrl = new AbortController();
+    setTimeout(() => ctrl.abort(), 30);
+
+    const collected: number[] = [];
+    for await (const ev of run.stream({ signal: ctrl.signal })) {
+      collected.push(ev.seq);
+    }
+    // Aborts cleanly without throwing.
+    expect(Array.isArray(collected)).toBe(true);
+  });
+});