diff --git a/apps/macos/Sources/OpenClawProtocol/GatewayModels.swift b/apps/macos/Sources/OpenClawProtocol/GatewayModels.swift
index 0b1d7b13e01..727921eacf8 100644
--- a/apps/macos/Sources/OpenClawProtocol/GatewayModels.swift
+++ b/apps/macos/Sources/OpenClawProtocol/GatewayModels.swift
@@ -630,6 +630,24 @@ public struct AgentParams: Codable, Sendable {
     }
 }
 
+public struct AgentAbortParams: Codable, Sendable {
+    public let runid: String
+    public let sessionkey: String?
+
+    public init(
+        runid: String,
+        sessionkey: String?)
+    {
+        self.runid = runid
+        self.sessionkey = sessionkey
+    }
+
+    private enum CodingKeys: String, CodingKey {
+        case runid = "runId"
+        case sessionkey = "sessionKey"
+    }
+}
+
 public struct AgentIdentityParams: Codable, Sendable {
     public let agentid: String?
     public let sessionkey: String?
diff --git a/apps/shared/OpenClawKit/Sources/OpenClawProtocol/GatewayModels.swift b/apps/shared/OpenClawKit/Sources/OpenClawProtocol/GatewayModels.swift
index 0b1d7b13e01..727921eacf8 100644
--- a/apps/shared/OpenClawKit/Sources/OpenClawProtocol/GatewayModels.swift
+++ b/apps/shared/OpenClawKit/Sources/OpenClawProtocol/GatewayModels.swift
@@ -630,6 +630,24 @@ public struct AgentParams: Codable, Sendable {
     }
 }
 
+public struct AgentAbortParams: Codable, Sendable {
+    public let runid: String
+    public let sessionkey: String?
+
+    public init(
+        runid: String,
+        sessionkey: String?)
+    {
+        self.runid = runid
+        self.sessionkey = sessionkey
+    }
+
+    private enum CodingKeys: String, CodingKey {
+        case runid = "runId"
+        case sessionkey = "sessionKey"
+    }
+}
+
 public struct AgentIdentityParams: Codable, Sendable {
     public let agentid: String?
     public let sessionkey: String?
diff --git a/src/gateway/agent-abort.ts b/src/gateway/agent-abort.ts
new file mode 100644
index 00000000000..948eb509c1a
--- /dev/null
+++ b/src/gateway/agent-abort.ts
@@ -0,0 +1,68 @@
+export type AgentAbortControllerEntry = {
+  controller: AbortController;
+  sessionKey?: string;
+  startedAtMs: number;
+  expiresAtMs: number;
+  clearableLanes?: string[];
+};
+
+export function resolveAgentRunExpiresAtMs(params: {
+  now: number;
+  timeoutMs?: number;
+  graceMs?: number;
+  minMs?: number;
+  maxMs?: number;
+}): number {
+  const {
+    now,
+    timeoutMs = 0,
+    graceMs = 60_000,
+    minMs = 2 * 60_000,
+    maxMs = 24 * 60 * 60_000,
+  } = params;
+  const boundedTimeoutMs = Math.max(0, timeoutMs);
+  // Preserve no-timeout semantics: if the caller explicitly requested a timeout
+  // longer than the default max (including timeout=0 → MAX_SAFE_TIMEOUT_MS),
+  // skip the 24h cap to avoid force-aborting long-running workflows.
+  if (boundedTimeoutMs > maxMs) {
+    return now + boundedTimeoutMs + graceMs;
+  }
+  const target = now + boundedTimeoutMs + graceMs;
+  const min = now + minMs;
+  const max = now + maxMs;
+  return Math.min(max, Math.max(min, target));
+}
+
+export function abortAgentRunById(
+  params: {
+    agentAbortControllers: Map<string, AgentAbortControllerEntry>;
+    runId: string;
+    sessionKey?: string;
+    reason?: unknown;
+  },
+  laneCleaner?: {
+    clearSessionLane: (sessionKey: string) => void;
+    clearLane: (lane: string) => void;
+  },
+): { aborted: boolean } {
+  const active = params.agentAbortControllers.get(params.runId);
+  if (!active) {
+    return { aborted: false };
+  }
+  if (active.sessionKey && params.sessionKey !== active.sessionKey) {
+    return { aborted: false };
+  }
+  active.controller.abort(params.reason);
+  params.agentAbortControllers.delete(params.runId);
+  if (laneCleaner) {
+    if (active.sessionKey) {
+      laneCleaner.clearSessionLane(active.sessionKey);
+    }
+    if (active.clearableLanes) {
+      for (const lane of active.clearableLanes) {
+        laneCleaner.clearLane(lane);
+      }
+    }
+  }
+  return { aborted: true };
+}
diff --git a/src/gateway/method-scopes.test.ts b/src/gateway/method-scopes.test.ts
index 2edac06885f..3dd19e04274 100644
--- a/src/gateway/method-scopes.test.ts
+++ b/src/gateway/method-scopes.test.ts
@@ -50,6 +50,16 @@ describe("operator scope authorization", () => {
     });
   });
 
+  it("requires admin for agent.abort", () => {
+    expect(authorizeOperatorScopesForMethod("agent.abort", ["operator.write"])).toEqual({
+      allowed: false,
+      missingScope: "operator.admin",
+    });
+    expect(authorizeOperatorScopesForMethod("agent.abort", ["operator.admin"])).toEqual({
+      allowed: true,
+    });
+  });
+
   it("requires approvals scope for approval methods", () => {
     expect(authorizeOperatorScopesForMethod("exec.approval.resolve", ["operator.write"])).toEqual({
       allowed: false,
diff --git a/src/gateway/method-scopes.ts b/src/gateway/method-scopes.ts
index f3a969301bf..7afa58ac299 100644
--- a/src/gateway/method-scopes.ts
+++ b/src/gateway/method-scopes.ts
@@ -95,6 +95,7 @@ const METHOD_SCOPE_GROUPS: Record<OperatorScope, readonly string[]> = {
     "send",
     "poll",
     "agent",
+    "agent.enqueue",
     "agent.wait",
     "wake",
     "talk.mode",
@@ -115,6 +116,7 @@ const METHOD_SCOPE_GROUPS: Record<OperatorScope, readonly string[]> = {
     "node.pending.enqueue",
   ],
   [ADMIN_SCOPE]: [
+    "agent.abort",
     "channels.logout",
     "agents.create",
     "agents.update",
diff --git a/src/gateway/protocol/index.ts b/src/gateway/protocol/index.ts
index 408074d44e4..801cb3c1635 100644
--- a/src/gateway/protocol/index.ts
+++ b/src/gateway/protocol/index.ts
@@ -1,6 +1,8 @@
 import AjvPkg, { type ErrorObject } from "ajv";
 import type { SessionsPatchResult } from "../session-utils.types.js";
 import {
+  type AgentAbortParams,
+  AgentAbortParamsSchema,
   type AgentEvent,
   AgentEventSchema,
   type AgentIdentityParams,
@@ -277,6 +279,7 @@ export const validateEventFrame = ajv.compile<EventFrame>(EventFrameSchema);
 export const validateSendParams = ajv.compile(SendParamsSchema);
 export const validatePollParams = ajv.compile<PollParams>(PollParamsSchema);
 export const validateAgentParams = ajv.compile(AgentParamsSchema);
+export const validateAgentAbortParams = ajv.compile<AgentAbortParams>(AgentAbortParamsSchema);
 export const validateAgentIdentityParams =
   ajv.compile<AgentIdentityParams>(AgentIdentityParamsSchema);
 export const validateAgentWaitParams = ajv.compile<AgentWaitParams>(AgentWaitParamsSchema);
@@ -496,6 +499,7 @@ export {
   ErrorShapeSchema,
   StateVersionSchema,
   AgentEventSchema,
+  AgentAbortParamsSchema,
   ChatEventSchema,
   SendParamsSchema,
   PollParamsSchema,
@@ -608,6 +612,7 @@ export type {
   ErrorShape,
   StateVersion,
   AgentEvent,
+  AgentAbortParams,
   AgentIdentityParams,
   AgentIdentityResult,
   AgentWaitParams,
diff --git a/src/gateway/protocol/schema/agent.ts b/src/gateway/protocol/schema/agent.ts
index b9c844b135b..18279b81121 100644
--- a/src/gateway/protocol/schema/agent.ts
+++ b/src/gateway/protocol/schema/agent.ts
@@ -130,6 +130,14 @@ export const AgentWaitParamsSchema = Type.Object(
   { additionalProperties: false },
 );
 
+export const AgentAbortParamsSchema = Type.Object(
+  {
+    runId: NonEmptyString,
+    sessionKey: Type.Optional(Type.String()),
+  },
+  { additionalProperties: false },
+);
+
 export const WakeParamsSchema = Type.Object(
   {
     mode: Type.Union([Type.Literal("now"), Type.Literal("next-heartbeat")]),
diff --git a/src/gateway/protocol/schema/protocol-schemas.ts b/src/gateway/protocol/schema/protocol-schemas.ts
index cf14fc44610..8eb98617b04 100644
--- a/src/gateway/protocol/schema/protocol-schemas.ts
+++ b/src/gateway/protocol/schema/protocol-schemas.ts
@@ -1,5 +1,6 @@
 import type { TSchema } from "@sinclair/typebox";
 import {
+  AgentAbortParamsSchema,
   AgentEventSchema,
   AgentIdentityParamsSchema,
   AgentIdentityResultSchema,
@@ -181,6 +182,7 @@ export const ProtocolSchemas = {
   SendParams: SendParamsSchema,
   PollParams: PollParamsSchema,
   AgentParams: AgentParamsSchema,
+  AgentAbortParams: AgentAbortParamsSchema,
   AgentIdentityParams: AgentIdentityParamsSchema,
   AgentIdentityResult: AgentIdentityResultSchema,
   AgentWaitParams: AgentWaitParamsSchema,
diff --git a/src/gateway/protocol/schema/types.ts b/src/gateway/protocol/schema/types.ts
index d74c08ad10b..2cfc154cd0b 100644
--- a/src/gateway/protocol/schema/types.ts
+++ b/src/gateway/protocol/schema/types.ts
@@ -18,6 +18,7 @@ export type AgentEvent = SchemaType<"AgentEvent">;
 export type AgentIdentityParams = SchemaType<"AgentIdentityParams">;
 export type AgentIdentityResult = SchemaType<"AgentIdentityResult">;
 export type PollParams = SchemaType<"PollParams">;
+export type AgentAbortParams = SchemaType<"AgentAbortParams">;
 export type AgentWaitParams = SchemaType<"AgentWaitParams">;
 export type WakeParams = SchemaType<"WakeParams">;
 export type NodePairRequestParams = SchemaType<"NodePairRequestParams">;
diff --git a/src/gateway/server-maintenance.test.ts b/src/gateway/server-maintenance.test.ts
index 045f73d802a..ccea522f7cf 100644
--- a/src/gateway/server-maintenance.test.ts
+++ b/src/gateway/server-maintenance.test.ts
@@ -22,6 +22,7 @@ function createMaintenanceTimerDeps() {
     refreshGatewayHealthSnapshot: async () => ({ ok: true }) as HealthSummary,
     logHealth: { error: () => {} },
     dedupe: new Map(),
+    agentAbortControllers: new Map(),
     chatAbortControllers: new Map(),
     chatRunState: { abortedRuns: new Map() },
     chatRunBuffers: new Map(),
diff --git a/src/gateway/server-maintenance.ts b/src/gateway/server-maintenance.ts
index 581e0d43ec3..2e29e98c603 100644
--- a/src/gateway/server-maintenance.ts
+++ b/src/gateway/server-maintenance.ts
@@ -1,5 +1,8 @@
+import { resolveSessionLane } from "../agents/pi-embedded-runner/lanes.js";
 import type { HealthSummary } from "../commands/health.js";
 import { cleanOldMedia } from "../media/store.js";
+import { clearCommandLane } from "../process/command-queue.js";
+import { abortAgentRunById, type AgentAbortControllerEntry } from "./agent-abort.js";
 import { abortChatRunById, type ChatAbortControllerEntry } from "./chat-abort.js";
 import type { ChatRunEntry } from "./server-chat.js";
 import {
@@ -27,6 +30,7 @@ export function startGatewayMaintenanceTimers(params: {
   refreshGatewayHealthSnapshot: (opts?: { probe?: boolean }) => Promise<HealthSummary>;
   logHealth: { error: (msg: string) => void };
   dedupe: Map<string, DedupeEntry>;
+  agentAbortControllers: Map<string, AgentAbortControllerEntry>;
   chatAbortControllers: Map<string, ChatAbortControllerEntry>;
   chatRunState: { abortedRuns: Map<string, number> };
   chatRunBuffers: Map<string, string>;
@@ -102,6 +106,24 @@ export function startGatewayMaintenanceTimers(params: {
       }
     }
 
+    for (const [runId, entry] of params.agentAbortControllers) {
+      if (now <= entry.expiresAtMs) {
+        continue;
+      }
+      abortAgentRunById(
+        {
+          agentAbortControllers: params.agentAbortControllers,
+          runId,
+          sessionKey: entry.sessionKey,
+          reason: "timeout",
+        },
+        {
+          clearSessionLane: (key) => clearCommandLane(resolveSessionLane(key), { force: true }),
+          clearLane: (lane) => clearCommandLane(lane, { force: true }),
+        },
+      );
+    }
+
     for (const [runId, entry] of params.chatAbortControllers) {
       if (now <= entry.expiresAtMs) {
         continue;
diff --git a/src/gateway/server-methods-list.ts b/src/gateway/server-methods-list.ts
index e930f8b0517..74858282b01 100644
--- a/src/gateway/server-methods-list.ts
+++ b/src/gateway/server-methods-list.ts
@@ -104,6 +104,8 @@ const BASE_METHODS = [
   "system-event",
   "send",
   "agent",
+  "agent.enqueue",
+  "agent.abort",
   "agent.identity.get",
   "agent.wait",
   "browser.request",
diff --git a/src/gateway/server-methods/agent.test.ts b/src/gateway/server-methods/agent.test.ts
index f29a9a4c85d..39e4ebda788 100644
--- a/src/gateway/server-methods/agent.test.ts
+++ b/src/gateway/server-methods/agent.test.ts
@@ -76,6 +76,13 @@ vi.mock("../session-reset-service.js", () => ({
     (mocks.performGatewaySessionReset as (...args: unknown[]) => unknown)(...args),
 }));
 
+vi.mock("../../process/command-queue.js", () => ({
+  clearCommandLane: vi.fn(),
+  enqueueCommandInLane: vi.fn((_lane: unknown, task: () => unknown) => task()),
+  CommandLaneClearedError: class extends Error { name = "CommandLaneClearedError"; },
+  GatewayDrainingError: class extends Error { name = "GatewayDrainingError"; },
+}));
+
 vi.mock("../../sessions/send-policy.js", () => ({
   resolveSendPolicy: () => "allow",
 }));
@@ -92,6 +99,8 @@ vi.mock("../../utils/delivery-context.js", async () => {
 
 const makeContext = (): GatewayRequestContext =>
   ({
+    agentAbortControllers: new Map(),
+    chatAbortControllers: new Map(),
     dedupe: new Map(),
     addChatRun: vi.fn(),
     logGateway: { info: vi.fn(), error: vi.fn() },
@@ -508,6 +517,8 @@ describe("gateway agent handler", () => {
       {
         respond,
         context: {
+          agentAbortControllers: new Map(),
+          chatAbortControllers: new Map(),
           dedupe: new Map(),
           addChatRun: vi.fn(),
           logGateway: { info: vi.fn(), error: vi.fn() },
@@ -747,6 +758,179 @@ describe("gateway agent handler", () => {
     expect(capturedEntry?.claudeCliSessionId).toBeUndefined();
   });
 
+  it("aborts active agent runs by run id", () => {
+    const respond = vi.fn();
+    const controller = new AbortController();
+    const context = makeContext();
+    context.agentAbortControllers.set("run-1", {
+      controller,
+      sessionKey: "agent:main:main",
+      startedAtMs: Date.now(),
+      expiresAtMs: Date.now() + 60_000,
+    });
+
+    void agentHandlers["agent.abort"]({
+      params: { runId: "run-1", sessionKey: "agent:main:main" },
+      respond: respond as never,
+      context,
+      req: { type: "req", id: "agent-abort-1", method: "agent.abort" },
+      client: null,
+      isWebchatConnect: () => false,
+    });
+
+    expect(controller.signal.aborted).toBe(true);
+    expect(context.agentAbortControllers.has("run-1")).toBe(false);
+    expect(respond).toHaveBeenCalledWith(true, { ok: true, aborted: true, runId: "run-1" });
+    mocks.loadConfigReturn = {};
+  });
+
+  it("does not abort a session-bound run when sessionKey is omitted", async () => {
+    const respond = vi.fn();
+    const controller = new AbortController();
+    const context = makeContext();
+    context.agentAbortControllers.set("run-1", {
+      controller,
+      sessionKey: "agent:main:main",
+      startedAtMs: Date.now(),
+      expiresAtMs: Date.now() + 60_000,
+    });
+
+    await agentHandlers["agent.abort"]({
+      params: { runId: "run-1" },
+      respond: respond as never,
+      context,
+      req: { type: "req", id: "agent-abort-missing-session", method: "agent.abort" },
+      client: null,
+      isWebchatConnect: () => false,
+    });
+
+    expect(controller.signal.aborted).toBe(false);
+    expect(context.agentAbortControllers.has("run-1")).toBe(true);
+    expect(respond).toHaveBeenCalledWith(true, { ok: true, aborted: false, runId: "run-1" });
+  });
+
+  it("canonicalizes alias session keys before aborting agent runs", async () => {
+    mocks.loadConfigReturn = { session: { mainKey: "work" } };
+    const respond = vi.fn();
+    const controller = new AbortController();
+    const context = makeContext();
+    context.agentAbortControllers.set("run-1", {
+      controller,
+      sessionKey: "agent:main:work",
+      startedAtMs: Date.now(),
+      expiresAtMs: Date.now() + 60_000,
+    });
+
+    await agentHandlers["agent.abort"]({
+      params: { runId: "run-1", sessionKey: "main" },
+      respond: respond as never,
+      context,
+      req: { type: "req", id: "agent-abort-alias-session", method: "agent.abort" },
+      client: null,
+      isWebchatConnect: () => false,
+    });
+
+    expect(controller.signal.aborted).toBe(true);
+    expect(context.agentAbortControllers.has("run-1")).toBe(false);
+    expect(respond).toHaveBeenCalledWith(true, { ok: true, aborted: true, runId: "run-1" });
+    mocks.loadConfigReturn = {};
+  });
+
+  it("clears session lane and custom clearable lanes on successful abort", async () => {
+    const { clearCommandLane } = await import("../../process/command-queue.js");
+    (clearCommandLane as ReturnType<typeof vi.fn>).mockClear();
+    const respond = vi.fn();
+    const controller = new AbortController();
+    const context = makeContext();
+    context.agentAbortControllers.set("run-lane", {
+      controller,
+      sessionKey: "agent:main:main",
+      sessionId: "test-session",
+      startedAtMs: Date.now(),
+      expiresAtMs: Date.now() + 60_000,
+      clearableLanes: ["custom:test-lane"],
+    });
+
+    await agentHandlers["agent.abort"]({
+      params: { runId: "run-lane", sessionKey: "agent:main:main" },
+      respond: respond as never,
+      context,
+      req: { type: "req", id: "agent-abort-lane", method: "agent.abort" },
+      client: null,
+      isWebchatConnect: () => false,
+    });
+
+    expect(controller.signal.aborted).toBe(true);
+    expect(respond).toHaveBeenCalledWith(true, { ok: true, aborted: true, runId: "run-lane" });
+    const clearCalls = (clearCommandLane as ReturnType<typeof vi.fn>).mock.calls;
+    expect(clearCalls.some((c: unknown[]) => c[0] === "session:agent:main:main")).toBe(true);
+    expect(clearCalls.some((c: unknown[]) => c[0] === "custom:test-lane")).toBe(true);
+  });
+
+  it("keeps a newer abort controller entry when an older run with the same id finishes", async () => {
+    mockMainSessionEntry({ sessionId: "existing-session-id" });
+    mocks.updateSessionStore.mockResolvedValue(undefined);
+
+    let resolveOlderRun:
+      | ((value: { payloads: Array<{ text: string }>; meta: { durationMs: number } }) => void)
+      | undefined;
+    mocks.agentCommand.mockImplementationOnce(
+      () =>
+        new Promise((resolve) => {
+          resolveOlderRun = resolve;
+        }),
+    );
+
+    const context = makeContext();
+    const respond = vi.fn();
+    await invokeAgent(
+      {
+        message: "older run",
+        agentId: "main",
+        sessionKey: "agent:main:main",
+        idempotencyKey: "shared-run-id",
+      },
+      { respond, reqId: "shared-run-id", context },
+    );
+
+    const olderEntry = context.agentAbortControllers.get("shared-run-id");
+    expect(olderEntry).toBeDefined();
+
+    const newerController = new AbortController();
+    context.agentAbortControllers.set("shared-run-id", {
+      controller: newerController,
+      sessionKey: "agent:main:main",
+      startedAtMs: Date.now(),
+      expiresAtMs: Date.now() + 60_000,
+    });
+
+    resolveOlderRun?.({
+      payloads: [{ text: "ok" }],
+      meta: { durationMs: 100 },
+    });
+    await vi.waitFor(() => expect(respond).toHaveBeenCalledTimes(2));
+
+    expect(context.agentAbortControllers.get("shared-run-id")?.controller).toBe(newerController);
+
+    const abortRespond = vi.fn();
+    await agentHandlers["agent.abort"]({
+      params: { runId: "shared-run-id", sessionKey: "agent:main:main" },
+      respond: abortRespond as never,
+      context,
+      req: { type: "req", id: "agent-abort-shared", method: "agent.abort" },
+      client: null,
+      isWebchatConnect: () => false,
+    });
+
+    expect(newerController.signal.aborted).toBe(true);
+    expect(context.agentAbortControllers.has("shared-run-id")).toBe(false);
+    expect(abortRespond).toHaveBeenCalledWith(true, {
+      ok: true,
+      aborted: true,
+      runId: "shared-run-id",
+    });
+  });
+
   it("prunes legacy main alias keys when writing a canonical session entry", async () => {
     mocks.loadSessionEntry.mockReturnValue({
       cfg: {
diff --git a/src/gateway/server-methods/agent.ts b/src/gateway/server-methods/agent.ts
index bd5637fa78f..b60f0beaad5 100644
--- a/src/gateway/server-methods/agent.ts
+++ b/src/gateway/server-methods/agent.ts
@@ -5,6 +5,9 @@ import {
   normalizeSpawnedRunMetadata,
   resolveIngressWorkspaceOverrideForSpawnedRun,
 } from "../../agents/spawned-context.js";
+import { resolveGlobalLane, resolveSessionLane } from "../../agents/pi-embedded-runner/lanes.js";
+import { resolveAgentTimeoutMs } from "../../agents/timeout.js";
+import { clearCommandLane } from "../../process/command-queue.js";
 import { buildBareSessionResetPrompt } from "../../auto-reply/reply/session-reset-prompt.js";
 import { agentCommandFromIngress } from "../../commands/agent.js";
 import { loadConfig } from "../../config/config.js";
@@ -26,6 +29,7 @@ import { classifySessionKeyShape, normalizeAgentId } from "../../routing/session
 import { defaultRuntime } from "../../runtime.js";
 import { normalizeInputProvenance, type InputProvenance } from "../../sessions/input-provenance.js";
 import { resolveSendPolicy } from "../../sessions/send-policy.js";
+import { parseAgentSessionKey } from "../../sessions/session-key-utils.js";
 import { normalizeSessionDeliveryFields } from "../../utils/delivery-context.js";
 import {
   INTERNAL_MESSAGE_CHANNEL,
@@ -33,6 +37,7 @@ import {
   isGatewayMessageChannel,
   normalizeMessageChannel,
 } from "../../utils/message-channel.js";
+import { abortAgentRunById, resolveAgentRunExpiresAtMs } from "../agent-abort.js";
 import { resolveAssistantIdentity } from "../assistant-identity.js";
 import { parseMessageWithAttachments } from "../chat-attachments.js";
 import { resolveAssistantAvatarUrl } from "../control-ui-shared.js";
@@ -42,6 +47,7 @@ import {
   ErrorCodes,
   errorShape,
   formatValidationErrors,
+  validateAgentAbortParams,
   validateAgentIdentityParams,
   validateAgentParams,
   validateAgentWaitParams,
@@ -101,6 +107,50 @@ async function runSessionResetFromAgent(params: {
   };
 }
 
+function canonicalizeAbortSessionKey(params: {
+  cfg: ReturnType<typeof loadConfig>;
+  activeSessionKey?: string;
+  requestedSessionKey?: string;
+}): string | undefined {
+  const raw = params.requestedSessionKey?.trim();
+  if (!raw) {
+    return undefined;
+  }
+  const lowered = raw.toLowerCase();
+  if (lowered === "global" || lowered === "unknown") {
+    return lowered;
+  }
+  if (lowered.startsWith("agent:")) {
+    const parsed = parseAgentSessionKey(lowered);
+    if (parsed) {
+      const canonicalMainKey = resolveAgentMainSessionKey({
+        cfg: params.cfg,
+        agentId: parsed.agentId,
+      }).toLowerCase();
+      const configuredMainAlias = canonicalMainKey.split(":").slice(2).join(":");
+      if (parsed.rest === "main" || parsed.rest === configuredMainAlias) {
+        return canonicalMainKey;
+      }
+    }
+    return lowered;
+  }
+  const activeAgentId =
+    (params.activeSessionKey ? resolveAgentIdFromSessionKey(params.activeSessionKey) : undefined) ??
+    resolveAgentIdFromSessionKey(lowered);
+  if (!activeAgentId) {
+    return lowered;
+  }
+  const canonicalMainKey = resolveAgentMainSessionKey({
+    cfg: params.cfg,
+    agentId: activeAgentId,
+  }).toLowerCase();
+  const configuredMainAlias = canonicalMainKey.split(":").slice(2).join(":");
+  if (lowered === "main" || lowered === configuredMainAlias) {
+    return canonicalMainKey;
+  }
+  return `agent:${normalizeAgentId(activeAgentId)}:${lowered}`;
+}
+
 function emitSessionsChanged(
   context: Pick<
     GatewayRequestHandlerOptions["context"],
@@ -142,6 +192,7 @@ function dispatchAgentRunFromGateway(params: {
   ingressOpts: Parameters<typeof agentCommandFromIngress>[0];
   runId: string;
   idempotencyKey: string;
+  abortController: AbortController;
   respond: GatewayRequestHandlerOptions["respond"];
   context: GatewayRequestHandlerOptions["context"];
 }) {
@@ -187,6 +238,12 @@ function dispatchAgentRunFromGateway(params: {
         runId: params.runId,
         error: formatForLog(err),
       });
+    })
+    .finally(() => {
+      const active = params.context.agentAbortControllers.get(params.runId);
+      if (active?.controller === params.abortController) {
+        params.context.agentAbortControllers.delete(params.runId);
+      }
     });
 }
 
@@ -625,11 +682,33 @@ export const agentHandlers: GatewayRequestHandlers = {
 
     const deliver = request.deliver === true && resolvedChannel !== INTERNAL_MESSAGE_CHANNEL;
 
+    const acceptedAt = Date.now();
     const accepted = {
       runId,
       status: "accepted" as const,
-      acceptedAt: Date.now(),
+      acceptedAt,
     };
+    const agentAbortController = new AbortController();
+    const requestLane = typeof request.lane === "string" ? request.lane.trim() : "";
+    const resolvedLane = requestLane ? resolveGlobalLane(requestLane) : "";
+    // Record the resolved lane for abort cleanup, but only if it's a custom lane
+    // (i.e. the caller explicitly named it and it wasn't remapped to a builtin).
+    const isClearableLane = Boolean(resolvedLane && resolvedLane === requestLane);
+    context.agentAbortControllers.set(runId, {
+      controller: agentAbortController,
+      sessionKey: resolvedSessionKey,
+      startedAtMs: acceptedAt,
+      expiresAtMs: resolveAgentRunExpiresAtMs({
+        now: acceptedAt,
+        timeoutMs: resolveAgentTimeoutMs({
+          cfg: cfgForAgent ?? cfg,
+          overrideSeconds: request.timeout,
+          // Subagent-lane runs default to no timeout (matching agent-command.ts behavior).
+          ...(request.lane === "subagent" && request.timeout == null ? { overrideMs: 0 } : {}),
+        }),
+      }),
+      ...(isClearableLane ? { clearableLanes: [resolvedLane] } : {}),
+    });
     // Store an in-flight ack so retries do not spawn a second run.
     setGatewayDedupeEntry({
       dedupe: context.dedupe,
@@ -699,6 +778,7 @@ export const agentHandlers: GatewayRequestHandlers = {
         extraSystemPrompt: request.extraSystemPrompt,
         internalEvents: request.internalEvents,
         inputProvenance,
+        abortSignal: agentAbortController.signal,
         // Internal-only: allow workspace override for spawned subagent runs.
         workspaceDir: resolveIngressWorkspaceOverrideForSpawnedRun({
           spawnedBy: spawnedByValue,
@@ -709,10 +789,51 @@ export const agentHandlers: GatewayRequestHandlers = {
       },
       runId,
       idempotencyKey: idem,
+      abortController: agentAbortController,
       respond,
       context,
     });
   },
+  "agent.enqueue": async ({ req, params, respond, context, client, isWebchatConnect }) => {
+    await agentHandlers.agent({ req, params, respond, context, client, isWebchatConnect });
+  },
+  "agent.abort": ({ params, respond, context }) => {
+    if (!validateAgentAbortParams(params)) {
+      respond(
+        false,
+        undefined,
+        errorShape(
+          ErrorCodes.INVALID_REQUEST,
+          `invalid agent.abort params: ${formatValidationErrors(validateAgentAbortParams.errors)}`,
+        ),
+      );
+      return;
+    }
+    const request = params as { runId: string; sessionKey?: string };
+    const runId = request.runId;
+    const activeSessionKey = context.agentAbortControllers.get(runId)?.sessionKey;
+    const sessionKey = canonicalizeAbortSessionKey({
+      cfg: loadConfig(),
+      activeSessionKey,
+      requestedSessionKey:
+        typeof request.sessionKey === "string" && request.sessionKey.trim()
+          ? request.sessionKey.trim()
+          : undefined,
+    });
+    const result = abortAgentRunById(
+      {
+        agentAbortControllers: context.agentAbortControllers,
+        runId,
+        sessionKey,
+        reason: "rpc",
+      },
+      {
+        clearSessionLane: (key) => clearCommandLane(resolveSessionLane(key), { force: true }),
+        clearLane: (lane) => clearCommandLane(lane, { force: true }),
+      },
+    );
+    respond(true, { ok: true, aborted: result.aborted, runId });
+  },
   "agent.identity.get": ({ params, respond }) => {
     if (!validateAgentIdentityParams(params)) {
       respond(
diff --git a/src/gateway/server-methods/types.ts b/src/gateway/server-methods/types.ts
index 39a6f458a5f..d0a8276568b 100644
--- a/src/gateway/server-methods/types.ts
+++ b/src/gateway/server-methods/types.ts
@@ -4,6 +4,7 @@ import type { HealthSummary } from "../../commands/health.js";
 import type { CronService } from "../../cron/service.js";
 import type { createSubsystemLogger } from "../../logging/subsystem.js";
 import type { WizardSession } from "../../wizard/session.js";
+import type { AgentAbortControllerEntry } from "../agent-abort.js";
 import type { ChatAbortControllerEntry } from "../chat-abort.js";
 import type { ExecApprovalManager } from "../exec-approval-manager.js";
 import type { NodeRegistry } from "../node-registry.js";
@@ -57,6 +58,7 @@ export type GatewayRequestContext = {
   hasExecApprovalClients?: () => boolean;
   nodeRegistry: NodeRegistry;
   agentRunSeq: Map<string, number>;
+  agentAbortControllers: Map<string, AgentAbortControllerEntry>;
   chatAbortControllers: Map<string, ChatAbortControllerEntry>;
   chatAbortedRuns: Map<string, number>;
   chatRunBuffers: Map<string, string>;
diff --git a/src/gateway/server-runtime-state.ts b/src/gateway/server-runtime-state.ts
index 50bc491f421..3ea22290103 100644
--- a/src/gateway/server-runtime-state.ts
+++ b/src/gateway/server-runtime-state.ts
@@ -11,6 +11,7 @@ import {
   resolveActivePluginHttpRouteRegistry,
 } from "../plugins/runtime.js";
 import type { RuntimeEnv } from "../runtime.js";
+import type { AgentAbortControllerEntry } from "./agent-abort.js";
 import type { AuthRateLimiter } from "./auth-rate-limit.js";
 import type { ResolvedGatewayAuth } from "./auth.js";
 import type { ChatAbortControllerEntry } from "./chat-abort.js";
@@ -84,6 +85,7 @@ export async function createGatewayRuntimeState(params: {
   broadcast: GatewayBroadcastFn;
   broadcastToConnIds: GatewayBroadcastToConnIdsFn;
   agentRunSeq: Map<string, number>;
+  agentAbortControllers: Map<string, AgentAbortControllerEntry>;
   dedupe: Map<string, DedupeEntry>;
   chatRunState: ReturnType<typeof createChatRunState>;
   chatRunBuffers: Map<string, string>;
@@ -216,6 +218,7 @@ export async function createGatewayRuntimeState(params: {
     }
 
     const agentRunSeq = new Map<string, number>();
+    const agentAbortControllers = new Map<string, AgentAbortControllerEntry>();
     const dedupe = new Map<string, DedupeEntry>();
     const chatRunState = createChatRunState();
     const chatRunRegistry = chatRunState.registry;
@@ -237,6 +240,7 @@ export async function createGatewayRuntimeState(params: {
       broadcast,
       broadcastToConnIds,
       agentRunSeq,
+      agentAbortControllers,
       dedupe,
       chatRunState,
       chatRunBuffers,
diff --git a/src/gateway/server.impl.ts b/src/gateway/server.impl.ts
index 7a4c18b6593..5400c099c29 100644
--- a/src/gateway/server.impl.ts
+++ b/src/gateway/server.impl.ts
@@ -685,6 +685,7 @@ export async function startGatewayServer(
     broadcast,
     broadcastToConnIds,
     agentRunSeq,
+    agentAbortControllers,
     dedupe,
     chatRunState,
     chatRunBuffers,
@@ -810,6 +811,7 @@ export async function startGatewayServer(
       refreshGatewayHealthSnapshot,
       logHealth,
       dedupe,
+      agentAbortControllers,
       chatAbortControllers,
       chatRunState,
       chatRunBuffers,
@@ -1095,6 +1097,7 @@ export async function startGatewayServer(
     },
     nodeRegistry,
     agentRunSeq,
+    agentAbortControllers,
     chatAbortControllers,
     chatAbortedRuns: chatRunState.abortedRuns,
     chatRunBuffers: chatRunState.buffers,
diff --git a/src/process/command-queue.ts b/src/process/command-queue.ts
index 956b386a6bf..8a3b45e12d9 100644
--- a/src/process/command-queue.ts
+++ b/src/process/command-queue.ts
@@ -220,7 +220,7 @@ export function getTotalQueueSize() {
   return total;
 }
 
-export function clearCommandLane(lane: string = CommandLane.Main) {
+export function clearCommandLane(lane: string = CommandLane.Main, opts?: { force?: boolean }) {
   const cleaned = lane.trim() || CommandLane.Main;
   const state = queueState.lanes.get(cleaned);
   if (!state) {
@@ -231,6 +231,11 @@ export function clearCommandLane(lane: string = CommandLane.Main) {
   for (const entry of pending) {
     entry.reject(new CommandLaneClearedError(cleaned));
   }
+  if (opts?.force) {
+    state.generation += 1;
+    state.activeTaskIds.clear();
+    state.draining = false;
+  }
   return removed;
 }