diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3dab0842940..a26a8e80b25 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -44,6 +44,7 @@ Docs: https://docs.openclaw.ai
 - Control UI/chat: add an expand-to-canvas button on assistant chat bubbles and in-app session navigation from Sessions and Cron views. Thanks @BunsDev.
 - Plugins/context engines: expose `delegateCompactionToRuntime(...)` on the public plugin SDK, refactor the legacy engine to use the shared helper, and clarify `ownsCompaction` delegation semantics for non-owning engines. (#49061) Thanks @jalehman.
 - Plugins/MiniMax: add MiniMax-M2.7 and MiniMax-M2.7-highspeed models and update the default model from M2.5 to M2.7. (#49691) Thanks @liyuan97.
+- Contracts/Matrix: validate Matrix session binding coverage through the real manager, expose the manager on the Matrix runtime API, and let tests pass an explicit state directory for isolated contract setup. (#50369) thanks @ChroniCat.
 
 ### Fixes
 
diff --git a/extensions/matrix/api.ts b/extensions/matrix/api.ts
index 620864b9a90..4a3e03f0a31 100644
--- a/extensions/matrix/api.ts
+++ b/extensions/matrix/api.ts
@@ -1,3 +1,8 @@
 export * from "./src/setup-core.js";
 export * from "./src/setup-surface.js";
+export {
+  createMatrixThreadBindingManager,
+  getMatrixThreadBindingManager,
+  resetMatrixThreadBindingsForTests,
+} from "./src/matrix/thread-bindings.js";
 export { matrixOnboardingAdapter as matrixSetupWizard } from "./src/onboarding.js";
diff --git a/extensions/matrix/src/matrix/thread-bindings.ts b/extensions/matrix/src/matrix/thread-bindings.ts
index eb9a7e4c1d9..fe3116f3691 100644
--- a/extensions/matrix/src/matrix/thread-bindings.ts
+++ b/extensions/matrix/src/matrix/thread-bindings.ts
@@ -173,6 +173,7 @@ function resolveBindingsPath(params: {
   auth: MatrixAuth;
   accountId: string;
   env?: NodeJS.ProcessEnv;
+  stateDir?: string;
 }): string {
   const storagePaths = resolveMatrixStoragePaths({
     homeserver: params.auth.homeserver,
@@ -181,6 +182,7 @@ function resolveBindingsPath(params: {
     accountId: params.accountId,
     deviceId: params.auth.deviceId,
     env: params.env,
+    stateDir: params.stateDir,
   });
   return path.join(storagePaths.rootDir, "thread-bindings.json");
 }
@@ -341,6 +343,7 @@ export async function createMatrixThreadBindingManager(params: {
   auth: MatrixAuth;
   client: MatrixClient;
   env?: NodeJS.ProcessEnv;
+  stateDir?: string;
   idleTimeoutMs: number;
   maxAgeMs: number;
   enableSweeper?: boolean;
@@ -360,6 +363,7 @@ export async function createMatrixThreadBindingManager(params: {
     auth: params.auth,
     accountId: params.accountId,
     env: params.env,
+    stateDir: params.stateDir,
   });
   const loaded = await loadBindingsFromDisk(filePath, params.accountId);
   for (const record of loaded) {
diff --git a/src/channels/plugins/contracts/registry.ts b/src/channels/plugins/contracts/registry.ts
index 94892151c7b..3068f790053 100644
--- a/src/channels/plugins/contracts/registry.ts
+++ b/src/channels/plugins/contracts/registry.ts
@@ -1,9 +1,13 @@
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
 import { expect, vi } from "vitest";
 import {
   __testing as discordThreadBindingTesting,
   createThreadBindingManager as createDiscordThreadBindingManager,
 } from "../../../../extensions/discord/runtime-api.js";
 import { createFeishuThreadBindingManager } from "../../../../extensions/feishu/api.js";
+import { createMatrixThreadBindingManager } from "../../../../extensions/matrix/api.js";
 import { createTelegramThreadBindingManager } from "../../../../extensions/telegram/runtime-api.js";
 import type { OpenClawConfig } from "../../../config/config.js";
 import {
@@ -126,7 +130,7 @@ type DirectoryContractEntry = {
 type SessionBindingContractEntry = {
   id: string;
   expectedCapabilities: SessionBindingCapabilities;
-  getCapabilities: () => SessionBindingCapabilities;
+  getCapabilities: () => SessionBindingCapabilities | Promise<SessionBindingCapabilities>;
   bindAndResolve: () => Promise<SessionBindingRecord>;
   unbindAndVerify: (binding: SessionBindingRecord) => Promise<void>;
   cleanup: () => Promise<void> | void;
@@ -136,6 +140,7 @@ function expectResolvedSessionBinding(params: {
   channel: string;
   accountId: string;
   conversationId: string;
+  parentConversationId?: string;
   targetSessionKey: string;
 }) {
   expect(
@@ -143,6 +148,7 @@ function expectResolvedSessionBinding(params: {
       channel: params.channel,
       accountId: params.accountId,
       conversationId: params.conversationId,
+      parentConversationId: params.parentConversationId,
     }),
   )?.toMatchObject({
     targetSessionKey: params.targetSessionKey,
@@ -589,6 +595,24 @@ const baseSessionBindingCfg = {
   session: { mainKey: "main", scope: "per-sender" },
 } satisfies OpenClawConfig;
 
+async function createContractMatrixThreadBindingManager() {
+  const stateDir = await fs.mkdtemp(path.join(os.tmpdir(), "matrix-contract-thread-bindings-"));
+  return await createMatrixThreadBindingManager({
+    accountId: "ops",
+    auth: {
+      accountId: "ops",
+      homeserver: "https://matrix.example.org",
+      userId: "@bot:example.org",
+      accessToken: "token",
+    },
+    client: {} as never,
+    stateDir,
+    idleTimeoutMs: 24 * 60 * 60 * 1000,
+    maxAgeMs: 0,
+    enableSweeper: false,
+  });
+}
+
 export const sessionBindingContractRegistry: SessionBindingContractEntry[] = [
   {
     id: "discord",
@@ -708,6 +732,61 @@ export const sessionBindingContractRegistry: SessionBindingContractEntry[] = [
       });
     },
   },
+  {
+    id: "matrix",
+    expectedCapabilities: {
+      adapterAvailable: true,
+      bindSupported: true,
+      unbindSupported: true,
+      placements: ["current", "child"],
+    },
+    getCapabilities: async () => {
+      await createContractMatrixThreadBindingManager();
+      return getSessionBindingService().getCapabilities({
+        channel: "matrix",
+        accountId: "ops",
+      });
+    },
+    bindAndResolve: async () => {
+      await createContractMatrixThreadBindingManager();
+      const service = getSessionBindingService();
+      const binding = await service.bind({
+        targetSessionKey: "agent:matrix:subagent:child-1",
+        targetKind: "subagent",
+        conversation: {
+          channel: "matrix",
+          accountId: "ops",
+          conversationId: "!room:example",
+        },
+        placement: "child",
+        metadata: {
+          label: "codex-matrix",
+          introText: "intro root",
+        },
+      });
+      expectResolvedSessionBinding({
+        channel: "matrix",
+        accountId: "ops",
+        conversationId: "$root",
+        parentConversationId: "!room:example",
+        targetSessionKey: "agent:matrix:subagent:child-1",
+      });
+      return binding;
+    },
+    unbindAndVerify: unbindAndExpectClearedSessionBinding,
+    cleanup: async () => {
+      const manager = await createContractMatrixThreadBindingManager();
+      manager.stop();
+      expect(
+        getSessionBindingService().resolveByConversation({
+          channel: "matrix",
+          accountId: "ops",
+          conversationId: "$root",
+          parentConversationId: "!room:example",
+        }),
+      ).toBeNull();
+    },
+  },
   {
     id: "telegram",
     expectedCapabilities: {
diff --git a/src/channels/plugins/contracts/session-binding.contract.test.ts b/src/channels/plugins/contracts/session-binding.contract.test.ts
index b8201569cde..efc85cb74b4 100644
--- a/src/channels/plugins/contracts/session-binding.contract.test.ts
+++ b/src/channels/plugins/contracts/session-binding.contract.test.ts
@@ -1,15 +1,32 @@
-import { beforeEach, describe } from "vitest";
+import { beforeEach, describe, vi } from "vitest";
 import { __testing as discordThreadBindingTesting } from "../../../../extensions/discord/src/monitor/thread-bindings.manager.js";
 import { __testing as feishuThreadBindingTesting } from "../../../../extensions/feishu/src/thread-bindings.js";
+import { resetMatrixThreadBindingsForTests } from "../../../../extensions/matrix/api.js";
 import { __testing as telegramThreadBindingTesting } from "../../../../extensions/telegram/src/thread-bindings.js";
 import { __testing as sessionBindingTesting } from "../../../infra/outbound/session-binding-service.js";
 import { sessionBindingContractRegistry } from "./registry.js";
 import { installSessionBindingContractSuite } from "./suites.js";
 
+vi.mock("../../../../extensions/matrix/src/matrix/send.js", async () => {
+  const actual = await vi.importActual<
+    typeof import("../../../../extensions/matrix/src/matrix/send.js")
+  >("../../../../extensions/matrix/src/matrix/send.js");
+  return {
+    ...actual,
+    sendMessageMatrix: vi.fn(
+      async (_to: string, _message: string, opts?: { threadId?: string }) => ({
+        messageId: opts?.threadId ? "$reply" : "$root",
+        roomId: "!room:example",
+      }),
+    ),
+  };
+});
+
 beforeEach(() => {
   sessionBindingTesting.resetSessionBindingAdaptersForTests();
   discordThreadBindingTesting.resetThreadBindingsForTests();
   feishuThreadBindingTesting.resetFeishuThreadBindingsForTests();
+  resetMatrixThreadBindingsForTests();
   telegramThreadBindingTesting.resetTelegramThreadBindingsForTests();
 });
 
diff --git a/src/channels/plugins/contracts/suites.ts b/src/channels/plugins/contracts/suites.ts
index 892d4b293f9..7c9803ee47f 100644
--- a/src/channels/plugins/contracts/suites.ts
+++ b/src/channels/plugins/contracts/suites.ts
@@ -478,14 +478,14 @@ export function installChannelDirectoryContractSuite(params: {
 }
 
 export function installSessionBindingContractSuite(params: {
-  getCapabilities: () => SessionBindingCapabilities;
+  getCapabilities: () => SessionBindingCapabilities | Promise<SessionBindingCapabilities>;
   bindAndResolve: () => Promise<SessionBindingRecord>;
   unbindAndVerify: (binding: SessionBindingRecord) => Promise<void>;
   cleanup: () => Promise<void> | void;
   expectedCapabilities: SessionBindingCapabilities;
 }) {
-  it("registers the expected session binding capabilities", () => {
-    expect(params.getCapabilities()).toEqual(params.expectedCapabilities);
+  it("registers the expected session binding capabilities", async () => {
+    expect(await params.getCapabilities()).toEqual(params.expectedCapabilities);
   });
 
   it("binds and resolves a session binding through the shared service", async () => {