diff --git a/src/channels/plugins/contracts/directory.contract.test.ts b/src/channels/plugins/contracts/directory.contract.test.ts
new file mode 100644
index 00000000000..97969adc35b
--- /dev/null
+++ b/src/channels/plugins/contracts/directory.contract.test.ts
@@ -0,0 +1,12 @@
+import { describe } from "vitest";
+import { directoryContractRegistry } from "./registry.js";
+import { installChannelDirectoryContractSuite } from "./suites.js";
+
+for (const entry of directoryContractRegistry) {
+  describe(`${entry.id} directory contract`, () => {
+    installChannelDirectoryContractSuite({
+      plugin: entry.plugin,
+      invokeLookups: entry.invokeLookups,
+    });
+  });
+}
diff --git a/src/channels/plugins/contracts/registry.contract.test.ts b/src/channels/plugins/contracts/registry.contract.test.ts
index 69ff11d8e68..a379792253a 100644
--- a/src/channels/plugins/contracts/registry.contract.test.ts
+++ b/src/channels/plugins/contracts/registry.contract.test.ts
@@ -1,10 +1,12 @@
 import { describe, expect, it } from "vitest";
 import {
   actionContractRegistry,
+  directoryContractRegistry,
   pluginContractRegistry,
   setupContractRegistry,
   statusContractRegistry,
   surfaceContractRegistry,
+  threadingContractRegistry,
   type ChannelPluginSurface,
 } from "./registry.js";
 
@@ -70,4 +72,26 @@ describe("channel contract registry", () => {
       expect(statusSurfaceIds.has(entry.id)).toBe(true);
     }
   });
+
+  it("only installs deep threading coverage for plugins that declare threading", () => {
+    const threadingSurfaceIds = new Set(
+      surfaceContractRegistry
+        .filter((entry) => entry.surfaces.includes("threading"))
+        .map((entry) => entry.id),
+    );
+    for (const entry of threadingContractRegistry) {
+      expect(threadingSurfaceIds.has(entry.id)).toBe(true);
+    }
+  });
+
+  it("only installs deep directory coverage for plugins that declare directory", () => {
+    const directorySurfaceIds = new Set(
+      surfaceContractRegistry
+        .filter((entry) => entry.surfaces.includes("directory"))
+        .map((entry) => entry.id),
+    );
+    for (const entry of directoryContractRegistry) {
+      expect(directorySurfaceIds.has(entry.id)).toBe(true);
+    }
+  });
 });
diff --git a/src/channels/plugins/contracts/registry.ts b/src/channels/plugins/contracts/registry.ts
index 2d4569383f8..617aa9c2221 100644
--- a/src/channels/plugins/contracts/registry.ts
+++ b/src/channels/plugins/contracts/registry.ts
@@ -84,6 +84,17 @@ type SurfaceContractEntry = {
   surfaces: readonly ChannelPluginSurface[];
 };
 
+type ThreadingContractEntry = {
+  id: string;
+  plugin: Pick<ChannelPlugin, "id" | "threading">;
+};
+
+type DirectoryContractEntry = {
+  id: string;
+  plugin: Pick<ChannelPlugin, "id" | "directory">;
+  invokeLookups: boolean;
+};
+
 const telegramListActionsMock = vi.fn();
 const telegramGetCapabilitiesMock = vi.fn();
 const discordListActionsMock = vi.fn();
@@ -672,3 +683,20 @@ export const surfaceContractRegistry: SurfaceContractEntry[] = [
     ],
   },
 ];
+
+export const threadingContractRegistry: ThreadingContractEntry[] = surfaceContractRegistry
+  .filter((entry) => entry.surfaces.includes("threading"))
+  .map((entry) => ({
+    id: entry.id,
+    plugin: entry.plugin,
+  }));
+
+const directoryShapeOnlyIds = new Set(["matrix", "whatsapp", "zalouser"]);
+
+export const directoryContractRegistry: DirectoryContractEntry[] = surfaceContractRegistry
+  .filter((entry) => entry.surfaces.includes("directory"))
+  .map((entry) => ({
+    id: entry.id,
+    plugin: entry.plugin,
+    invokeLookups: !directoryShapeOnlyIds.has(entry.id),
+  }));
diff --git a/src/channels/plugins/contracts/session-binding.contract.test.ts b/src/channels/plugins/contracts/session-binding.contract.test.ts
new file mode 100644
index 00000000000..a21632c4515
--- /dev/null
+++ b/src/channels/plugins/contracts/session-binding.contract.test.ts
@@ -0,0 +1,151 @@
+import { beforeEach, describe, expect } from "vitest";
+import {
+  __testing as feishuThreadBindingTesting,
+  createFeishuThreadBindingManager,
+} from "../../../../extensions/feishu/src/thread-bindings.js";
+import {
+  __testing as telegramThreadBindingTesting,
+  createTelegramThreadBindingManager,
+} from "../../../../extensions/telegram/src/thread-bindings.js";
+import type { OpenClawConfig } from "../../../config/config.js";
+import {
+  __testing as sessionBindingTesting,
+  getSessionBindingService,
+} from "../../../infra/outbound/session-binding-service.js";
+import { installSessionBindingContractSuite } from "./suites.js";
+
+const baseCfg = {
+  session: { mainKey: "main", scope: "per-sender" },
+} satisfies OpenClawConfig;
+
+beforeEach(() => {
+  sessionBindingTesting.resetSessionBindingAdaptersForTests();
+  feishuThreadBindingTesting.resetFeishuThreadBindingsForTests();
+  telegramThreadBindingTesting.resetTelegramThreadBindingsForTests();
+});
+
+describe("feishu session binding contract", () => {
+  installSessionBindingContractSuite({
+    expectedCapabilities: {
+      adapterAvailable: true,
+      bindSupported: true,
+      unbindSupported: true,
+      placements: ["current"],
+    },
+    getCapabilities: () => {
+      createFeishuThreadBindingManager({ cfg: baseCfg, accountId: "default" });
+      return getSessionBindingService().getCapabilities({
+        channel: "feishu",
+        accountId: "default",
+      });
+    },
+    bindAndResolve: async () => {
+      createFeishuThreadBindingManager({ cfg: baseCfg, accountId: "default" });
+      const service = getSessionBindingService();
+      const binding = await service.bind({
+        targetSessionKey: "agent:codex:acp:binding:feishu:default:abc123",
+        targetKind: "session",
+        conversation: {
+          channel: "feishu",
+          accountId: "default",
+          conversationId: "oc_group_chat:topic:om_topic_root",
+          parentConversationId: "oc_group_chat",
+        },
+        placement: "current",
+        metadata: {
+          agentId: "codex",
+          label: "codex-main",
+        },
+      });
+      expect(
+        service.resolveByConversation({
+          channel: "feishu",
+          accountId: "default",
+          conversationId: "oc_group_chat:topic:om_topic_root",
+        }),
+      )?.toMatchObject({
+        targetSessionKey: "agent:codex:acp:binding:feishu:default:abc123",
+      });
+      return binding;
+    },
+    cleanup: async () => {
+      const manager = createFeishuThreadBindingManager({ cfg: baseCfg, accountId: "default" });
+      manager.stop();
+      expect(
+        getSessionBindingService().resolveByConversation({
+          channel: "feishu",
+          accountId: "default",
+          conversationId: "oc_group_chat:topic:om_topic_root",
+        }),
+      ).toBeNull();
+    },
+  });
+});
+
+describe("telegram session binding contract", () => {
+  installSessionBindingContractSuite({
+    expectedCapabilities: {
+      adapterAvailable: true,
+      bindSupported: true,
+      unbindSupported: true,
+      placements: ["current"],
+    },
+    getCapabilities: () => {
+      createTelegramThreadBindingManager({
+        accountId: "default",
+        persist: false,
+        enableSweeper: false,
+      });
+      return getSessionBindingService().getCapabilities({
+        channel: "telegram",
+        accountId: "default",
+      });
+    },
+    bindAndResolve: async () => {
+      createTelegramThreadBindingManager({
+        accountId: "default",
+        persist: false,
+        enableSweeper: false,
+      });
+      const service = getSessionBindingService();
+      const binding = await service.bind({
+        targetSessionKey: "agent:main:subagent:child-1",
+        targetKind: "subagent",
+        conversation: {
+          channel: "telegram",
+          accountId: "default",
+          conversationId: "-100200300:topic:77",
+        },
+        placement: "current",
+        metadata: {
+          boundBy: "user-1",
+        },
+      });
+      expect(
+        service.resolveByConversation({
+          channel: "telegram",
+          accountId: "default",
+          conversationId: "-100200300:topic:77",
+        }),
+      )?.toMatchObject({
+        targetSessionKey: "agent:main:subagent:child-1",
+      });
+      return binding;
+    },
+    cleanup: async () => {
+      const manager = createTelegramThreadBindingManager({
+        accountId: "default",
+        persist: false,
+        enableSweeper: false,
+      });
+      manager.stop();
+      expect(
+        getSessionBindingService().resolveByConversation({
+          channel: "telegram",
+          accountId: "default",
+          conversationId: "-100200300:topic:77",
+        }),
+      ).toBeNull();
+    },
+  });
+});
diff --git a/src/channels/plugins/contracts/suites.ts b/src/channels/plugins/contracts/suites.ts
index f2c8a8e3b16..90d852e7923 100644
--- a/src/channels/plugins/contracts/suites.ts
+++ b/src/channels/plugins/contracts/suites.ts
@@ -5,13 +5,21 @@ import type {
   ResolveProviderRuntimeGroupPolicyParams,
   RuntimeGroupPolicyResolution,
 } from "../../../config/runtime-group-policy.js";
+import type {
+  SessionBindingCapabilities,
+  SessionBindingRecord,
+} from "../../../infra/outbound/session-binding-service.js";
 import { normalizeChatType } from "../../chat-type.js";
 import { resolveConversationLabel } from "../../conversation-label.js";
 import { validateSenderIdentity } from "../../sender-identity.js";
 import type {
   ChannelAccountSnapshot,
   ChannelAccountState,
+  ChannelDirectoryEntry,
+  ChannelFocusedBindingContext,
+  ChannelReplyTransport,
   ChannelSetupInput,
+  ChannelThreadingToolContext,
 } from "../types.core.js";
 import type {
   ChannelMessageActionName,
@@ -23,6 +31,68 @@ function sortStrings(values: readonly string[]) {
   return [...values].toSorted((left, right) => left.localeCompare(right));
 }
 
+function expectDirectoryEntryShape(entry: ChannelDirectoryEntry) {
+  expect(["user", "group", "channel"]).toContain(entry.kind);
+  expect(typeof entry.id).toBe("string");
+  expect(entry.id.trim()).not.toBe("");
+  if (entry.name !== undefined) {
+    expect(typeof entry.name).toBe("string");
+  }
+  if (entry.handle !== undefined) {
+    expect(typeof entry.handle).toBe("string");
+  }
+  if (entry.avatarUrl !== undefined) {
+    expect(typeof entry.avatarUrl).toBe("string");
+  }
+  if (entry.rank !== undefined) {
+    expect(typeof entry.rank).toBe("number");
+  }
+}
+
+function expectThreadingToolContextShape(context: ChannelThreadingToolContext) {
+  if (context.currentChannelId !== undefined) {
+    expect(typeof context.currentChannelId).toBe("string");
+  }
+  if (context.currentChannelProvider !== undefined) {
+    expect(typeof context.currentChannelProvider).toBe("string");
+  }
+  if (context.currentThreadTs !== undefined) {
+    expect(typeof context.currentThreadTs).toBe("string");
+  }
+  if (context.currentMessageId !== undefined) {
+    expect(["string", "number"]).toContain(typeof context.currentMessageId);
+  }
+  if (context.replyToMode !== undefined) {
+    expect(["off", "first", "all"]).toContain(context.replyToMode);
+  }
+  if (context.hasRepliedRef !== undefined) {
+    expect(typeof context.hasRepliedRef).toBe("object");
+  }
+  if (context.skipCrossContextDecoration !== undefined) {
+    expect(typeof context.skipCrossContextDecoration).toBe("boolean");
+  }
+}
+
+function expectReplyTransportShape(transport: ChannelReplyTransport) {
+  if (transport.replyToId !== undefined && transport.replyToId !== null) {
+    expect(typeof transport.replyToId).toBe("string");
+  }
+  if (transport.threadId !== undefined && transport.threadId !== null) {
+    expect(["string", "number"]).toContain(typeof transport.threadId);
+  }
+}
+
+function expectFocusedBindingShape(binding: ChannelFocusedBindingContext) {
+  expect(typeof binding.conversationId).toBe("string");
+  expect(binding.conversationId.trim()).not.toBe("");
+  if (binding.parentConversationId !== undefined) {
+    expect(typeof binding.parentConversationId).toBe("string");
+  }
+  expect(["current", "child"]).toContain(binding.placement);
+  expect(typeof binding.labelNoun).toBe("string");
+  expect(binding.labelNoun.trim()).not.toBe("");
+}
+
 export function installChannelPluginContractSuite(params: {
   plugin: Pick<ChannelPlugin, "id" | "meta" | "capabilities" | "config">;
 }) {
@@ -228,6 +298,186 @@ export function installChannelSurfaceContractSuite(params: {
   });
 }
 
+export function installChannelThreadingContractSuite(params: {
+  plugin: Pick<ChannelPlugin, "id" | "threading">;
+}) {
+  it("exposes the base threading contract", () => {
+    expect(params.plugin.threading).toBeDefined();
+  });
+
+  it("keeps threading return values normalized", () => {
+    const threading = params.plugin.threading;
+    expect(threading).toBeDefined();
+
+    if (threading?.resolveReplyToMode) {
+      expect(
+        ["off", "first", "all"].includes(
+          threading.resolveReplyToMode({
+            cfg: {} as OpenClawConfig,
+            accountId: "default",
+            chatType: "group",
+          }),
+        ),
+      ).toBe(true);
+    }
+
+    const repliedRef = { value: false };
+    const toolContext = threading?.buildToolContext?.({
+      cfg: {} as OpenClawConfig,
+      accountId: "default",
+      context: {
+        Channel: "group:test",
+        From: "user:test",
+        To: "group:test",
+        ChatType: "group",
+        CurrentMessageId: "msg-1",
+        ReplyToId: "msg-0",
+        ReplyToIdFull: "thread-0",
+        MessageThreadId: "thread-0",
+        NativeChannelId: "native:test",
+      },
+      hasRepliedRef: repliedRef,
+    });
+
+    if (toolContext) {
+      expectThreadingToolContextShape(toolContext);
+      if (toolContext.hasRepliedRef) {
+        expect(toolContext.hasRepliedRef).toBe(repliedRef);
+      }
+    }
+
+    const autoThreadId = threading?.resolveAutoThreadId?.({
+      cfg: {} as OpenClawConfig,
+      accountId: "default",
+      to: "group:test",
+      toolContext,
+      replyToId: null,
+    });
+    if (autoThreadId !== undefined) {
+      expect(typeof autoThreadId).toBe("string");
+      expect(autoThreadId.trim()).not.toBe("");
+    }
+
+    const replyTransport = threading?.resolveReplyTransport?.({
+      cfg: {} as OpenClawConfig,
+      accountId: "default",
+      threadId: "thread-0",
+      replyToId: "msg-0",
+    });
+    if (replyTransport) {
+      expectReplyTransportShape(replyTransport);
+    }
+
+    const focusedBinding = threading?.resolveFocusedBinding?.({
+      cfg: {} as OpenClawConfig,
+      accountId: "default",
+      context: {
+        Channel: "group:test",
+        From: "user:test",
+        To: "group:test",
+        ChatType: "group",
+        CurrentMessageId: "msg-1",
+        ReplyToId: "msg-0",
+        ReplyToIdFull: "thread-0",
+        MessageThreadId: "thread-0",
+        NativeChannelId: "native:test",
+      },
+    });
+    if (focusedBinding) {
+      expectFocusedBindingShape(focusedBinding);
+    }
+  });
+}
+
+export function installChannelDirectoryContractSuite(params: {
+  plugin: Pick<ChannelPlugin, "id" | "directory">;
+  invokeLookups?: boolean;
+}) {
+  it("exposes the base directory contract", async () => {
+    const directory = params.plugin.directory;
+    expect(directory).toBeDefined();
+
+    if (params.invokeLookups === false) {
+      return;
+    }
+
+    const self = await directory?.self?.({
+      cfg: {} as OpenClawConfig,
+      accountId: "default",
+    });
+    if (self) {
+      expectDirectoryEntryShape(self);
+    }
+
+    const peers =
+      (await directory?.listPeers?.({
+        cfg: {} as OpenClawConfig,
+        accountId: "default",
+        query: "",
+        limit: 5,
+      })) ?? [];
+    expect(Array.isArray(peers)).toBe(true);
+    for (const peer of peers) {
+      expectDirectoryEntryShape(peer);
+    }
+
+    const groups =
+      (await directory?.listGroups?.({
+        cfg: {} as OpenClawConfig,
+        accountId: "default",
+        query: "",
+        limit: 5,
+      })) ?? [];
+    expect(Array.isArray(groups)).toBe(true);
+    for (const group of groups) {
+      expectDirectoryEntryShape(group);
+    }
+
+    if (directory?.listGroupMembers && groups[0]?.id) {
+      const members = await directory.listGroupMembers({
+        cfg: {} as OpenClawConfig,
+        accountId: "default",
+        groupId: groups[0].id,
+        query: "",
+        limit: 5,
+      });
+      expect(Array.isArray(members)).toBe(true);
+      for (const member of members) {
+        expectDirectoryEntryShape(member);
+      }
+    }
+  });
+}
+
+export function installSessionBindingContractSuite(params: {
+  getCapabilities: () => SessionBindingCapabilities;
+  bindAndResolve: () => Promise<SessionBindingRecord>;
+  cleanup: () => Promise<void> | void;
+  expectedCapabilities: SessionBindingCapabilities;
+}) {
+  it("registers the expected session binding capabilities", () => {
+    expect(params.getCapabilities()).toEqual(params.expectedCapabilities);
+  });
+
+  it("binds and resolves a session binding through the shared service", async () => {
+    const binding = await params.bindAndResolve();
+    expect(typeof binding.bindingId).toBe("string");
+    expect(binding.bindingId.trim()).not.toBe("");
+    expect(typeof binding.targetSessionKey).toBe("string");
+    expect(binding.targetSessionKey.trim()).not.toBe("");
+    expect(["session", "subagent"]).toContain(binding.targetKind);
+    expect(typeof binding.conversation.channel).toBe("string");
+    expect(typeof binding.conversation.accountId).toBe("string");
+    expect(typeof binding.conversation.conversationId).toBe("string");
+    expect(["active", "ending", "ended"]).toContain(binding.status);
+    expect(typeof binding.boundAt).toBe("number");
+  });
+
+  it("cleans up registered bindings", async () => {
+    await params.cleanup();
+  });
+}
+
 type ChannelSetupContractCase<ResolvedAccount> = {
   name: string;
   cfg: OpenClawConfig;
diff --git a/src/channels/plugins/contracts/threading.contract.test.ts b/src/channels/plugins/contracts/threading.contract.test.ts
new file mode 100644
index 00000000000..54799b54c44
--- /dev/null
+++ b/src/channels/plugins/contracts/threading.contract.test.ts
@@ -0,0 +1,11 @@
+import { describe } from "vitest";
+import { threadingContractRegistry } from "./registry.js";
+import { installChannelThreadingContractSuite } from "./suites.js";
+
+for (const entry of threadingContractRegistry) {
+  describe(`${entry.id} threading contract`, () => {
+    installChannelThreadingContractSuite({
+      plugin: entry.plugin,
+    });
+  });
+}