diff --git a/packages/server/src/server/agent/providers/pi/extensions/pi-subagents/reported-workflow.repro.test.ts b/packages/server/src/server/agent/providers/pi/extensions/pi-subagents/reported-workflow.repro.test.ts
new file mode 100644
index 0000000000..e98103eae1
--- /dev/null
+++ b/packages/server/src/server/agent/providers/pi/extensions/pi-subagents/reported-workflow.repro.test.ts
@@ -0,0 +1,61 @@
+import { expect, test } from "vitest";
+import { mkdtemp, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { createPiExtensionHost } from "../index.js";
+
+test("reported workflowScript completion publishes reviewer and its saved timeline", async () => {
+  const dir = await mkdtemp(join(tmpdir(), "paseo-workflow-repro-"));
+  const host = createPiExtensionHost();
+  try {
+    const sessionFile = join(dir, "child.jsonl");
+    await writeFile(
+      sessionFile,
+      JSON.stringify({
+        type: "message",
+        message: { role: "assistant", content: [{ type: "text", text: "README summary" }] },
+      }) + "\n",
+    );
+    const args = {
+      workflowScript:
+        "return await runs.run('review', { agent: 'reviewer', task: 'Read README.md and return a one-sentence summary. Do not modify files.' });",
+      async: false,
+    };
+    host.mapToolCall({
+      callId: "reported-workflow",
+      toolName: "subagent",
+      args,
+      status: "running",
+      result: null,
+    });
+    const output = host.mapToolCall({
+      callId: "reported-workflow",
+      toolName: "subagent",
+      args,
+      status: "completed",
+      result: {
+        details: {
+          mode: "workflow",
+          runId: "reported-run",
+          results: [{ index: 0, agent: "reviewer", exitCode: 0, sessionFile }],
+        },
+      },
+    });
+    expect(output?.subagents).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({ type: "upsert", title: "reviewer", status: "completed" }),
+      ]),
+    );
+    expect(await output!.hydration).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          type: "provider_subagent",
+          event: expect.objectContaining({ type: "timeline" }),
+        }),
+      ]),
+    );
+  } finally {
+    host.close();
+    await rm(dir, { recursive: true, force: true });
+  }
+});