diff --git a/src/agents/subagent-announce.format.test.ts b/src/agents/subagent-announce.format.test.ts
index 4fc052d3b..5fc72d662 100644
--- a/src/agents/subagent-announce.format.test.ts
+++ b/src/agents/subagent-announce.format.test.ts
@@ -191,4 +191,85 @@ describe("subagent announce formatting", () => {
     expect(call?.params?.to).toBe("+1555");
     expect(call?.params?.accountId).toBe("kev");
   });
+
+  it("uses requester accountId for direct announce when not queued", async () => {
+    const { runSubagentAnnounceFlow } = await import("./subagent-announce.js");
+    embeddedRunMock.isEmbeddedPiRunActive.mockReturnValue(false);
+    embeddedRunMock.isEmbeddedPiRunStreaming.mockReturnValue(false);
+
+    const didAnnounce = await runSubagentAnnounceFlow({
+      childSessionKey: "agent:main:subagent:test",
+      childRunId: "run-direct",
+      requesterSessionKey: "agent:main:main",
+      requesterChannel: "whatsapp",
+      requesterAccountId: "acct-123",
+      requesterDisplayKey: "main",
+      task: "do thing",
+      timeoutMs: 1000,
+      cleanup: "keep",
+      waitForCompletion: false,
+      startedAt: 10,
+      endedAt: 20,
+      outcome: { status: "ok" },
+    });
+
+    expect(didAnnounce).toBe(true);
+    const call = agentSpy.mock.calls[0]?.[0] as { params?: Record<string, unknown> };
+    expect(call?.params?.channel).toBe("whatsapp");
+    expect(call?.params?.accountId).toBe("acct-123");
+  });
+
+  it("splits collect-mode announces when accountId differs", async () => {
+    const { runSubagentAnnounceFlow } = await import("./subagent-announce.js");
+    embeddedRunMock.isEmbeddedPiRunActive.mockReturnValue(true);
+    embeddedRunMock.isEmbeddedPiRunStreaming.mockReturnValue(false);
+    sessionStore = {
+      "agent:main:main": {
+        sessionId: "session-789",
+        lastChannel: "whatsapp",
+        lastTo: "+1555",
+        queueMode: "collect",
+        queueDebounceMs: 0,
+      },
+    };
+
+    await runSubagentAnnounceFlow({
+      childSessionKey: "agent:main:subagent:test",
+      childRunId: "run-a",
+      requesterSessionKey: "main",
+      requesterAccountId: "acct-a",
+      requesterDisplayKey: "main",
+      task: "do thing",
+      timeoutMs: 1000,
+      cleanup: "keep",
+      waitForCompletion: false,
+      startedAt: 10,
+      endedAt: 20,
+      outcome: { status: "ok" },
+    });
+
+    await runSubagentAnnounceFlow({
+      childSessionKey: "agent:main:subagent:test",
+      childRunId: "run-b",
+      requesterSessionKey: "main",
+      requesterAccountId: "acct-b",
+      requesterDisplayKey: "main",
+      task: "do thing",
+      timeoutMs: 1000,
+      cleanup: "keep",
+      waitForCompletion: false,
+      startedAt: 10,
+      endedAt: 20,
+      outcome: { status: "ok" },
+    });
+
+    await new Promise((r) => setTimeout(r, 5));
+
+    const accountIds = agentSpy.mock.calls.map(
+      (call) => (call[0] as { params?: Record<string, unknown> }).params?.accountId,
+    );
+    expect(accountIds).toContain("acct-a");
+    expect(accountIds).toContain("acct-b");
+    expect(agentSpy).toHaveBeenCalledTimes(2);
+  });
 });
diff --git a/src/agents/subagent-announce.ts b/src/agents/subagent-announce.ts
index c7801610f..0c3453d40 100644
--- a/src/agents/subagent-announce.ts
+++ b/src/agents/subagent-announce.ts
@@ -351,6 +351,19 @@ function loadRequesterSessionEntry(requesterSessionKey: string) {
   return { cfg, entry, canonicalKey };
 }
 
+function resolveAnnounceOrigin(params: {
+  channel?: string;
+  to?: string;
+  accountId?: string;
+  fallbackAccountId?: string;
+}) {
+  return normalizeDeliveryContext({
+    channel: params.channel,
+    to: params.to,
+    accountId: params.accountId ?? params.fallbackAccountId,
+  });
+}
+
 async function maybeQueueSubagentAnnounce(params: {
   requesterSessionKey: string;
   triggerMessage: string;
@@ -381,10 +394,11 @@ async function maybeQueueSubagentAnnounce(params: {
     queueSettings.mode === "steer-backlog" ||
     queueSettings.mode === "interrupt";
   if (isActive && (shouldFollowup || queueSettings.mode === "steer")) {
-    const origin = normalizeDeliveryContext({
+    const origin = resolveAnnounceOrigin({
       channel: entry?.lastChannel,
       to: entry?.lastTo,
-      accountId: entry?.lastAccountId ?? params.requesterAccountId,
+      accountId: entry?.lastAccountId,
+      fallbackAccountId: params.requesterAccountId,
     });
     enqueueAnnounce(
       canonicalKey,
@@ -624,7 +638,7 @@ export async function runSubagentAnnounceFlow(params: {
     }
 
     // Send to main agent - it will respond in its own voice
-    const directOrigin = normalizeDeliveryContext({
+    const directOrigin = resolveAnnounceOrigin({
       channel: params.requesterChannel,
       accountId: params.requesterAccountId,
     });
diff --git a/src/commands/agent.delivery.test.ts b/src/commands/agent.delivery.test.ts
index 8f5aecd2a..34d004c60 100644
--- a/src/commands/agent.delivery.test.ts
+++ b/src/commands/agent.delivery.test.ts
@@ -1,4 +1,4 @@
-import { describe, expect, it, vi } from "vitest";
+import { beforeEach, describe, expect, it, vi } from "vitest";
 
 import type { CliDeps } from "../cli/deps.js";
 import type { ClawdbotConfig } from "../config/config.js";
@@ -25,6 +25,11 @@ vi.mock("../infra/outbound/targets.js", () => ({
 }));
 
 describe("deliverAgentCommandResult", () => {
+  beforeEach(() => {
+    mocks.deliverOutboundPayloads.mockClear();
+    mocks.resolveOutboundTarget.mockClear();
+  });
+
   it("prefers explicit accountId for outbound delivery", async () => {
     const cfg = {} as ClawdbotConfig;
     const deps = {} as CliDeps;
@@ -61,4 +66,39 @@ describe("deliverAgentCommandResult", () => {
       expect.objectContaining({ accountId: "kev" }),
     );
   });
+
+  it("falls back to session accountId for implicit delivery", async () => {
+    const cfg = {} as ClawdbotConfig;
+    const deps = {} as CliDeps;
+    const runtime = {
+      log: vi.fn(),
+      error: vi.fn(),
+    } as unknown as RuntimeEnv;
+    const sessionEntry = {
+      lastAccountId: "legacy",
+    } as SessionEntry;
+    const result = {
+      payloads: [{ text: "hi" }],
+      meta: {},
+    };
+
+    const { deliverAgentCommandResult } = await import("./agent/delivery.js");
+    await deliverAgentCommandResult({
+      cfg,
+      deps,
+      runtime,
+      opts: {
+        message: "hello",
+        deliver: true,
+        channel: "whatsapp",
+      },
+      sessionEntry,
+      result,
+      payloads: result.payloads,
+    });
+
+    expect(mocks.deliverOutboundPayloads).toHaveBeenCalledWith(
+      expect.objectContaining({ accountId: "legacy" }),
+    );
+  });
 });