diff --git a/CHANGELOG.md b/CHANGELOG.md
index f01cfcf17..153143b1a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -58,6 +58,7 @@
 ### Fixes
 - Messages: make `/stop` clear queued followups and pending session lane work for a hard abort.
 - Messages: make `/stop` abort active sub-agent runs spawned from the requester session and report how many were stopped.
+- Sessions: ensure `sessions.delete` clears queues, aborts embedded runs, and stops sub-agents before deletion.
 - WhatsApp: default response prefix only for self-chat, using identity name when set.
 - Signal/iMessage: bound transport readiness waits to 30s with periodic logging. (#1014) — thanks @Szpadel.
 - Auth: merge main auth profiles into per-agent stores for sub-agents and document inheritance. (#1013) — thanks @marcmarg.
diff --git a/src/gateway/server-methods/sessions.ts b/src/gateway/server-methods/sessions.ts
index e2b9f5a0c..fd4ab7163 100644
--- a/src/gateway/server-methods/sessions.ts
+++ b/src/gateway/server-methods/sessions.ts
@@ -3,17 +3,16 @@ import fs from "node:fs";
 
 import {
   abortEmbeddedPiRun,
-  isEmbeddedPiRunActive,
-  resolveEmbeddedSessionLane,
   waitForEmbeddedPiRunEnd,
 } from "../../agents/pi-embedded.js";
+import { stopSubagentsForRequester } from "../../auto-reply/reply/abort.js";
+import { clearSessionQueues } from "../../auto-reply/reply/queue.js";
 import { loadConfig } from "../../config/config.js";
 import {
   resolveMainSessionKey,
   type SessionEntry,
   updateSessionStore,
 } from "../../config/sessions.js";
-import { clearCommandLane } from "../../process/command-queue.js";
 import {
   ErrorCodes,
   errorShape,
@@ -223,8 +222,12 @@ export const sessionsHandlers: GatewayRequestHandlers = {
     const { entry } = loadSessionEntry(key);
     const sessionId = entry?.sessionId;
     const existed = Boolean(entry);
-    clearCommandLane(resolveEmbeddedSessionLane(target.canonicalKey));
-    if (sessionId && isEmbeddedPiRunActive(sessionId)) {
+    const queueKeys = new Set<string>(target.storeKeys);
+    queueKeys.add(target.canonicalKey);
+    if (sessionId) queueKeys.add(sessionId);
+    clearSessionQueues([...queueKeys]);
+    stopSubagentsForRequester({ cfg, requesterSessionKey: target.canonicalKey });
+    if (sessionId) {
       abortEmbeddedPiRun(sessionId);
       const ended = await waitForEmbeddedPiRunEnd(sessionId, 15_000);
       if (!ended) {
diff --git a/src/gateway/server.sessions.gateway-server-sessions-a.test.ts b/src/gateway/server.sessions.gateway-server-sessions-a.test.ts
index b18108d94..9396c50fd 100644
--- a/src/gateway/server.sessions.gateway-server-sessions-a.test.ts
+++ b/src/gateway/server.sessions.gateway-server-sessions-a.test.ts
@@ -1,7 +1,7 @@
 import fs from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
-import { describe, expect, test } from "vitest";
+import { beforeEach, describe, expect, test, vi } from "vitest";
 import {
   connectOk,
   embeddedRunMock,
@@ -13,9 +13,39 @@ import {
 } from "./test-helpers.js";
 import { DEFAULT_PROVIDER } from "../agents/defaults.js";
 
+const sessionCleanupMocks = vi.hoisted(() => ({
+  clearSessionQueues: vi.fn(() => ({ followupCleared: 0, laneCleared: 0, keys: [] })),
+  stopSubagentsForRequester: vi.fn(() => ({ stopped: 0 })),
+}));
+
+vi.mock("../auto-reply/reply/queue.js", async () => {
+  const actual = await vi.importActual<typeof import("../auto-reply/reply/queue.js")>(
+    "../auto-reply/reply/queue.js",
+  );
+  return {
+    ...actual,
+    clearSessionQueues: sessionCleanupMocks.clearSessionQueues,
+  };
+});
+
+vi.mock("../auto-reply/reply/abort.js", async () => {
+  const actual = await vi.importActual<typeof import("../auto-reply/reply/abort.js")>(
+    "../auto-reply/reply/abort.js",
+  );
+  return {
+    ...actual,
+    stopSubagentsForRequester: sessionCleanupMocks.stopSubagentsForRequester,
+  };
+});
+
 installGatewayTestHooks();
 
 describe("gateway server sessions", () => {
+  beforeEach(() => {
+    sessionCleanupMocks.clearSessionQueues.mockClear();
+    sessionCleanupMocks.stopSubagentsForRequester.mockClear();
+  });
+
   test("lists and patches session store via sessions.* RPC", async () => {
     const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-sessions-"));
     const storePath = path.join(dir, "sessions.json");
@@ -349,6 +379,15 @@ describe("gateway server sessions", () => {
     });
     expect(deleted.ok).toBe(true);
     expect(deleted.payload?.deleted).toBe(true);
+    expect(sessionCleanupMocks.stopSubagentsForRequester).toHaveBeenCalledWith({
+      cfg: expect.any(Object),
+      requesterSessionKey: "agent:main:discord:group:dev",
+    });
+    expect(sessionCleanupMocks.clearSessionQueues).toHaveBeenCalledTimes(1);
+    const clearedKeys = sessionCleanupMocks.clearSessionQueues.mock.calls[0]?.[0] as string[];
+    expect(clearedKeys).toEqual(
+      expect.arrayContaining(["discord:group:dev", "agent:main:discord:group:dev", "sess-active"]),
+    );
     expect(embeddedRunMock.abortCalls).toEqual(["sess-active"]);
     expect(embeddedRunMock.waitCalls).toEqual(["sess-active"]);