diff --git a/src/channels/dock.ts b/src/channels/dock.ts
index c5139c76116..1f19251d535 100644
--- a/src/channels/dock.ts
+++ b/src/channels/dock.ts
@@ -9,6 +9,7 @@ import {
   resolveChannelGroupToolsPolicy,
 } from "../config/group-policy.js";
 import { requireActiveExtensionHostRegistry } from "../extension-host/active-registry.js";
+import { listExtensionHostChannelRegistrations } from "../extension-host/runtime-registry.js";
 import {
   formatAllowFromLowercase,
   formatNormalizedAllowFromEntries,
@@ -585,7 +586,7 @@ function listPluginDockEntries(): Array<{ id: ChannelId; dock: ChannelDock; orde
   const registry = requireActiveExtensionHostRegistry();
   const entries: Array<{ id: ChannelId; dock: ChannelDock; order?: number }> = [];
   const seen = new Set<string>();
-  for (const entry of registry.channels) {
+  for (const entry of listExtensionHostChannelRegistrations(registry)) {
     const plugin = entry.plugin;
     const id = String(plugin.id).trim();
     if (!id || seen.has(id)) {
@@ -628,7 +629,9 @@ export function getChannelDock(id: ChannelId): ChannelDock | undefined {
     return core;
   }
   const registry = requireActiveExtensionHostRegistry();
-  const pluginEntry = registry.channels.find((entry) => entry.plugin.id === id);
+  const pluginEntry = listExtensionHostChannelRegistrations(registry).find(
+    (entry) => entry.plugin.id === id,
+  );
   if (!pluginEntry) {
     return undefined;
   }
diff --git a/src/channels/plugins/index.ts b/src/channels/plugins/index.ts
index feeb34a4324..8525ef55b1f 100644
--- a/src/channels/plugins/index.ts
+++ b/src/channels/plugins/index.ts
@@ -2,6 +2,7 @@ import {
   getActiveExtensionHostRegistryVersion,
   requireActiveExtensionHostRegistry,
 } from "../../extension-host/active-registry.js";
+import { listExtensionHostChannelRegistrations } from "../../extension-host/runtime-registry.js";
 import { CHAT_CHANNEL_ORDER, type ChatChannelId, normalizeAnyChannelId } from "../registry.js";
 import type { ChannelId, ChannelPlugin } from "./types.js";
 
@@ -47,7 +48,9 @@ function resolveCachedChannelPlugins(): CachedChannelPlugins {
     return cached;
   }
 
-  const sorted = dedupeChannels(registry.channels.map((entry) => entry.plugin)).toSorted((a, b) => {
+  const sorted = dedupeChannels(
+    listExtensionHostChannelRegistrations(registry).map((entry) => entry.plugin),
+  ).toSorted((a, b) => {
     const indexA = CHAT_CHANNEL_ORDER.indexOf(a.id as ChatChannelId);
     const indexB = CHAT_CHANNEL_ORDER.indexOf(b.id as ChatChannelId);
     const orderA = a.meta.order ?? (indexA === -1 ? 999 : indexA);
diff --git a/src/channels/plugins/plugins-core.test.ts b/src/channels/plugins/plugins-core.test.ts
index 8297a6b7519..dd27de2c743 100644
--- a/src/channels/plugins/plugins-core.test.ts
+++ b/src/channels/plugins/plugins-core.test.ts
@@ -10,6 +10,7 @@ import type { SlackProbe } from "../../../extensions/slack/src/probe.js";
 import type { TelegramProbe } from "../../../extensions/telegram/src/probe.js";
 import type { TelegramTokenResolution } from "../../../extensions/telegram/src/token.js";
 import type { OpenClawConfig } from "../../config/config.js";
+import { addExtensionHostChannelRegistration } from "../../extension-host/runtime-registry.js";
 import type { LineProbeResult } from "../../line/types.js";
 import { setActivePluginRegistry } from "../../plugins/runtime.js";
 import {
@@ -96,13 +97,12 @@ describe("channel plugin registry", () => {
     setActivePluginRegistry(registry, "registry-test");
     expect(listChannelPlugins().map((plugin) => plugin.id)).toEqual(["slack"]);
 
-    registry.channels = [
-      {
-        pluginId: "telegram",
-        plugin: createPlugin("telegram"),
-        source: "test",
-      },
-    ] as typeof registry.channels;
+    registry.channels = [] as typeof registry.channels;
+    addExtensionHostChannelRegistration(registry, {
+      pluginId: "telegram",
+      plugin: createPlugin("telegram"),
+      source: "test",
+    });
     setActivePluginRegistry(registry, "registry-test");
 
     expect(listChannelPlugins().map((plugin) => plugin.id)).toEqual(["telegram"]);
diff --git a/src/channels/plugins/registry-loader.ts b/src/channels/plugins/registry-loader.ts
index cb4130787b5..f852cd8da03 100644
--- a/src/channels/plugins/registry-loader.ts
+++ b/src/channels/plugins/registry-loader.ts
@@ -1,4 +1,5 @@
 import { getActiveExtensionHostRegistry } from "../../extension-host/active-registry.js";
+import { listExtensionHostChannelRegistrations } from "../../extension-host/runtime-registry.js";
 import type { PluginChannelRegistration, PluginRegistry } from "../../plugins/registry.js";
 import type { ChannelId } from "./types.js";
 
@@ -22,7 +23,9 @@ export function createChannelRegistryLoader<TValue>(
     if (cached) {
       return cached;
     }
-    const pluginEntry = registry?.channels.find((entry) => entry.plugin.id === id);
+    const pluginEntry = registry
+      ? listExtensionHostChannelRegistrations(registry).find((entry) => entry.plugin.id === id)
+      : undefined;
     if (!pluginEntry) {
       return undefined;
     }
diff --git a/src/channels/registry.ts b/src/channels/registry.ts
index 052b869f732..4ab1c55030c 100644
--- a/src/channels/registry.ts
+++ b/src/channels/registry.ts
@@ -1,4 +1,5 @@
 import { requireActiveExtensionHostRegistry } from "../extension-host/active-registry.js";
+import { listExtensionHostChannelRegistrations } from "../extension-host/runtime-registry.js";
 import type { ChannelMeta } from "./plugins/types.js";
 import type { ChannelId } from "./plugins/types.js";
 
@@ -170,7 +171,7 @@ export function normalizeAnyChannelId(raw?: string | null): ChannelId | null {
   }
 
   const registry = requireActiveExtensionHostRegistry();
-  const hit = registry.channels.find((entry) => {
+  const hit = listExtensionHostChannelRegistrations(registry).find((entry) => {
     const id = String(entry.plugin.id ?? "")
       .trim()
       .toLowerCase();
diff --git a/src/extension-host/plugin-registry-registrations.ts b/src/extension-host/plugin-registry-registrations.ts
index d162ff5e077..2f34c2de7c0 100644
--- a/src/extension-host/plugin-registry-registrations.ts
+++ b/src/extension-host/plugin-registry-registrations.ts
@@ -44,6 +44,7 @@ import {
   resolveExtensionTypedHookRegistration,
 } from "./runtime-registrations.js";
 import {
+  listExtensionHostChannelRegistrations,
   getExtensionHostGatewayHandlers,
   listExtensionHostHttpRoutes,
 } from "./runtime-registry.js";
@@ -182,7 +183,7 @@ export function createExtensionHostPluginRegistrationActions(params: {
     registration: OpenClawPluginChannelRegistration | ChannelPlugin,
   ) => {
     const result = resolveExtensionChannelRegistration({
-      existing: registry.channels,
+      existing: [...listExtensionHostChannelRegistrations(registry)],
       ownerPluginId: record.id,
       ownerSource: record.source,
       registration,
diff --git a/src/extension-host/registry-writes.ts b/src/extension-host/registry-writes.ts
index fbf3a27a0a5..87b67a6806c 100644
--- a/src/extension-host/registry-writes.ts
+++ b/src/extension-host/registry-writes.ts
@@ -25,6 +25,7 @@ import type {
   ExtensionHostToolRegistration,
 } from "./runtime-registrations.js";
 import {
+  addExtensionHostChannelRegistration,
   addExtensionHostCliRegistration,
   addExtensionHostHttpRoute,
   addExtensionHostProviderRegistration,
@@ -78,7 +79,7 @@ export function addExtensionChannelRegistration(params: {
   entry: ExtensionHostChannelRegistration;
 }): void {
   params.record.channelIds.push(params.channelId);
-  params.registry.channels.push(params.entry as PluginChannelRegistration);
+  addExtensionHostChannelRegistration(params.registry, params.entry as PluginChannelRegistration);
 }
 
 export function addExtensionProviderRegistration(params: {
diff --git a/src/extension-host/runtime-registry.test.ts b/src/extension-host/runtime-registry.test.ts
index 7f0094dd096..47965b43af3 100644
--- a/src/extension-host/runtime-registry.test.ts
+++ b/src/extension-host/runtime-registry.test.ts
@@ -1,6 +1,7 @@
 import { describe, expect, it, vi } from "vitest";
 import { createEmptyPluginRegistry } from "../plugins/registry.js";
 import {
+  addExtensionHostChannelRegistration,
   addExtensionHostCliRegistration,
   addExtensionHostHttpRoute,
   addExtensionHostProviderRegistration,
@@ -8,6 +9,7 @@ import {
   addExtensionHostToolRegistration,
   getExtensionHostGatewayHandlers,
   hasExtensionHostRuntimeEntries,
+  listExtensionHostChannelRegistrations,
   listExtensionHostCliRegistrations,
   listExtensionHostHttpRoutes,
   listExtensionHostProviderRegistrations,
@@ -43,6 +45,28 @@ describe("extension host runtime registry accessors", () => {
     });
     expect(hasExtensionHostRuntimeEntries(routeRegistry)).toBe(true);
 
+    const channelRegistry = createEmptyPluginRegistry();
+    addExtensionHostChannelRegistration(channelRegistry, {
+      pluginId: "channel-demo",
+      source: "test",
+      plugin: {
+        id: "channel-demo",
+        meta: {
+          id: "channel-demo",
+          label: "Channel Demo",
+          selectionLabel: "Channel Demo",
+          docsPath: "/channels/channel-demo",
+          blurb: "demo",
+        },
+        capabilities: { chatTypes: ["direct"] },
+        config: {
+          listAccountIds: () => [],
+          resolveAccount: () => ({}),
+        },
+      },
+    });
+    expect(hasExtensionHostRuntimeEntries(channelRegistry)).toBe(true);
+
     const gatewayRegistry = createEmptyPluginRegistry();
     setExtensionHostGatewayHandler({
       registry: gatewayRegistry,
@@ -75,6 +99,7 @@ describe("extension host runtime registry accessors", () => {
   it("returns stable empty views for missing registries", () => {
     expect(hasExtensionHostRuntimeEntries(null)).toBe(false);
     expect(listExtensionHostProviderRegistrations(null)).toEqual([]);
+    expect(listExtensionHostChannelRegistrations(null)).toEqual([]);
     expect(listExtensionHostToolRegistrations(null)).toEqual([]);
     expect(listExtensionHostServiceRegistrations(null)).toEqual([]);
     expect(listExtensionHostCliRegistrations(null)).toEqual([]);
@@ -136,6 +161,27 @@ describe("extension host runtime registry accessors", () => {
       handler,
     });
 
+    addExtensionHostChannelRegistration(registry, {
+      pluginId: "channel-demo",
+      source: "test",
+      plugin: {
+        id: "channel-demo",
+        meta: {
+          id: "channel-demo",
+          label: "Channel Demo",
+          selectionLabel: "Channel Demo",
+          docsPath: "/channels/channel-demo",
+          blurb: "demo",
+        },
+        capabilities: { chatTypes: ["direct"] },
+        config: {
+          listAccountIds: () => [],
+          resolveAccount: () => ({}),
+        },
+      },
+    });
+
+    expect(listExtensionHostChannelRegistrations(registry)).toEqual(registry.channels);
     expect(listExtensionHostToolRegistrations(registry)).toEqual(registry.tools);
     expect(listExtensionHostProviderRegistrations(registry)).toEqual(registry.providers);
     expect(listExtensionHostServiceRegistrations(registry)).toEqual(registry.services);
@@ -229,4 +275,32 @@ describe("extension host runtime registry accessors", () => {
     expect(registry.tools[0]?.factory).toBe(factory);
     expect(registry.providers[0]?.provider).toBe(provider);
   });
+
+  it("keeps legacy channel mirrors synchronized with host-owned state", () => {
+    const registry = createEmptyPluginRegistry();
+    const plugin = {
+      id: "channel-demo",
+      meta: {
+        id: "channel-demo",
+        label: "Channel Demo",
+        selectionLabel: "Channel Demo",
+        docsPath: "/channels/channel-demo",
+        blurb: "demo",
+      },
+      capabilities: { chatTypes: ["direct"] as const },
+      config: {
+        listAccountIds: () => [],
+        resolveAccount: () => ({}),
+      },
+    };
+
+    addExtensionHostChannelRegistration(registry, {
+      pluginId: "channel-demo",
+      source: "test",
+      plugin,
+    });
+
+    expect(listExtensionHostChannelRegistrations(registry)).toEqual(registry.channels);
+    expect(registry.channels[0]?.plugin).toBe(plugin);
+  });
 });
diff --git a/src/extension-host/runtime-registry.ts b/src/extension-host/runtime-registry.ts
index 15a914fb3ba..64a1ce7e54a 100644
--- a/src/extension-host/runtime-registry.ts
+++ b/src/extension-host/runtime-registry.ts
@@ -1,5 +1,6 @@
 import type { GatewayRequestHandlers } from "../gateway/server-methods/types.js";
 import type {
+  PluginChannelRegistration,
   PluginCliRegistration,
   PluginHttpRouteRegistration,
   PluginProviderRegistration,
@@ -10,6 +11,7 @@ import type {
 
 const EMPTY_PROVIDERS: readonly PluginProviderRegistration[] = [];
 const EMPTY_TOOLS: readonly PluginToolRegistration[] = [];
+const EMPTY_CHANNELS: readonly PluginChannelRegistration[] = [];
 const EMPTY_SERVICES: readonly PluginServiceRegistration[] = [];
 const EMPTY_CLI_REGISTRARS: readonly PluginCliRegistration[] = [];
 const EMPTY_HTTP_ROUTES: readonly PluginHttpRouteRegistration[] = [];
@@ -17,6 +19,8 @@ const EMPTY_GATEWAY_HANDLERS: Readonly<GatewayRequestHandlers> = Object.freeze({
 const EXTENSION_HOST_RUNTIME_REGISTRY_STATE = Symbol.for("openclaw.extensionHostRuntimeRegistry");
 
 type ExtensionHostRuntimeRegistryState = {
+  channels: PluginChannelRegistration[];
+  legacyChannels: PluginChannelRegistration[];
   tools: PluginToolRegistration[];
   legacyTools: PluginToolRegistration[];
   providers: PluginProviderRegistration[];
@@ -33,7 +37,13 @@ type ExtensionHostRuntimeRegistryState = {
 
 type RuntimeRegistryBackedPluginRegistry = Pick<
   PluginRegistry,
-  "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+  | "channels"
+  | "tools"
+  | "providers"
+  | "cliRegistrars"
+  | "services"
+  | "httpRoutes"
+  | "gatewayHandlers"
 > & {
   [EXTENSION_HOST_RUNTIME_REGISTRY_STATE]?: ExtensionHostRuntimeRegistryState;
 };
@@ -41,8 +51,37 @@ type RuntimeRegistryBackedPluginRegistry = Pick<
 function ensureExtensionHostRuntimeRegistryState(
   registry: RuntimeRegistryBackedPluginRegistry,
 ): ExtensionHostRuntimeRegistryState {
-  if (registry[EXTENSION_HOST_RUNTIME_REGISTRY_STATE]) {
-    return registry[EXTENSION_HOST_RUNTIME_REGISTRY_STATE];
+  const existing = registry[EXTENSION_HOST_RUNTIME_REGISTRY_STATE];
+  if (existing) {
+    if (registry.channels !== existing.legacyChannels) {
+      existing.legacyChannels = registry.channels ?? [];
+      existing.channels = [...existing.legacyChannels];
+    }
+    if (registry.tools !== existing.legacyTools) {
+      existing.legacyTools = registry.tools ?? [];
+      existing.tools = [...existing.legacyTools];
+    }
+    if (registry.providers !== existing.legacyProviders) {
+      existing.legacyProviders = registry.providers ?? [];
+      existing.providers = [...existing.legacyProviders];
+    }
+    if (registry.cliRegistrars !== existing.legacyCliRegistrars) {
+      existing.legacyCliRegistrars = registry.cliRegistrars ?? [];
+      existing.cliRegistrars = [...existing.legacyCliRegistrars];
+    }
+    if (registry.services !== existing.legacyServices) {
+      existing.legacyServices = registry.services ?? [];
+      existing.services = [...existing.legacyServices];
+    }
+    if (registry.httpRoutes !== existing.legacyHttpRoutes) {
+      existing.legacyHttpRoutes = registry.httpRoutes ?? [];
+      existing.httpRoutes = [...existing.legacyHttpRoutes];
+    }
+    if (registry.gatewayHandlers !== existing.legacyGatewayHandlers) {
+      existing.legacyGatewayHandlers = registry.gatewayHandlers ?? {};
+      existing.gatewayHandlers = { ...existing.legacyGatewayHandlers };
+    }
+    return existing;
   }
 
   const legacyHttpRoutes = registry.httpRoutes ?? [];
@@ -53,12 +92,16 @@ function ensureExtensionHostRuntimeRegistryState(
   registry.cliRegistrars = legacyCliRegistrars;
   const legacyServices = registry.services ?? [];
   registry.services = legacyServices;
+  const legacyChannels = registry.channels ?? [];
+  registry.channels = legacyChannels;
   const legacyTools = registry.tools ?? [];
   registry.tools = legacyTools;
   const legacyProviders = registry.providers ?? [];
   registry.providers = legacyProviders;
 
   const state: ExtensionHostRuntimeRegistryState = {
+    channels: [...legacyChannels],
+    legacyChannels,
     tools: [...legacyTools],
     legacyTools,
     providers: [...legacyProviders],
@@ -76,6 +119,10 @@ function ensureExtensionHostRuntimeRegistryState(
   return state;
 }
 
+function syncLegacyChannels(state: ExtensionHostRuntimeRegistryState): void {
+  state.legacyChannels.splice(0, state.legacyChannels.length, ...state.channels);
+}
+
 function syncLegacyTools(state: ExtensionHostRuntimeRegistryState): void {
   state.legacyTools.splice(0, state.legacyTools.length, ...state.tools);
 }
@@ -129,7 +176,7 @@ export function hasExtensionHostRuntimeEntries(
   }
   return (
     registry.plugins.length > 0 ||
-    registry.channels.length > 0 ||
+    listExtensionHostChannelRegistrations(registry).length > 0 ||
     listExtensionHostToolRegistrations(registry).length > 0 ||
     listExtensionHostProviderRegistrations(registry).length > 0 ||
     Object.keys(getExtensionHostGatewayHandlers(registry)).length > 0 ||
@@ -146,7 +193,13 @@ export function listExtensionHostProviderRegistrations(
   registry:
     | Pick<
         PluginRegistry,
-        "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+        | "channels"
+        | "tools"
+        | "providers"
+        | "cliRegistrars"
+        | "services"
+        | "httpRoutes"
+        | "gatewayHandlers"
       >
     | null
     | undefined,
@@ -162,7 +215,13 @@ export function listExtensionHostToolRegistrations(
   registry:
     | Pick<
         PluginRegistry,
-        "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+        | "channels"
+        | "tools"
+        | "providers"
+        | "cliRegistrars"
+        | "services"
+        | "httpRoutes"
+        | "gatewayHandlers"
       >
     | null
     | undefined,
@@ -174,9 +233,40 @@ export function listExtensionHostToolRegistrations(
     .tools;
 }
 
+export function listExtensionHostChannelRegistrations(
+  registry:
+    | Pick<
+        PluginRegistry,
+        | "channels"
+        | "tools"
+        | "providers"
+        | "cliRegistrars"
+        | "services"
+        | "httpRoutes"
+        | "gatewayHandlers"
+      >
+    | null
+    | undefined,
+): readonly PluginChannelRegistration[] {
+  if (!registry) {
+    return EMPTY_CHANNELS;
+  }
+  return ensureExtensionHostRuntimeRegistryState(registry as RuntimeRegistryBackedPluginRegistry)
+    .channels;
+}
+
 export function listExtensionHostServiceRegistrations(
   registry:
-    | Pick<PluginRegistry, "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers">
+    | Pick<
+        PluginRegistry,
+        | "channels"
+        | "tools"
+        | "providers"
+        | "cliRegistrars"
+        | "services"
+        | "httpRoutes"
+        | "gatewayHandlers"
+      >
     | null
     | undefined,
 ): readonly PluginServiceRegistration[] {
@@ -189,7 +279,16 @@ export function listExtensionHostServiceRegistrations(
 
 export function listExtensionHostCliRegistrations(
   registry:
-    | Pick<PluginRegistry, "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers">
+    | Pick<
+        PluginRegistry,
+        | "channels"
+        | "tools"
+        | "providers"
+        | "cliRegistrars"
+        | "services"
+        | "httpRoutes"
+        | "gatewayHandlers"
+      >
     | null
     | undefined,
 ): readonly PluginCliRegistration[] {
@@ -204,7 +303,13 @@ export function listExtensionHostHttpRoutes(
   registry:
     | Pick<
         PluginRegistry,
-        "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+        | "channels"
+        | "tools"
+        | "providers"
+        | "cliRegistrars"
+        | "services"
+        | "httpRoutes"
+        | "gatewayHandlers"
       >
     | null
     | undefined,
@@ -220,7 +325,13 @@ export function getExtensionHostGatewayHandlers(
   registry:
     | Pick<
         PluginRegistry,
-        "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+        | "channels"
+        | "tools"
+        | "providers"
+        | "cliRegistrars"
+        | "services"
+        | "httpRoutes"
+        | "gatewayHandlers"
       >
     | null
     | undefined,
@@ -235,7 +346,13 @@ export function getExtensionHostGatewayHandlers(
 export function addExtensionHostHttpRoute(
   registry: Pick<
     PluginRegistry,
-    "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+    | "channels"
+    | "tools"
+    | "providers"
+    | "cliRegistrars"
+    | "services"
+    | "httpRoutes"
+    | "gatewayHandlers"
   >,
   entry: PluginHttpRouteRegistration,
 ): void {
@@ -249,7 +366,13 @@ export function addExtensionHostHttpRoute(
 export function replaceExtensionHostHttpRoute(params: {
   registry: Pick<
     PluginRegistry,
-    "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+    | "channels"
+    | "tools"
+    | "providers"
+    | "cliRegistrars"
+    | "services"
+    | "httpRoutes"
+    | "gatewayHandlers"
   >;
   index: number;
   entry: PluginHttpRouteRegistration;
@@ -264,7 +387,13 @@ export function replaceExtensionHostHttpRoute(params: {
 export function removeExtensionHostHttpRoute(
   registry: Pick<
     PluginRegistry,
-    "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+    | "channels"
+    | "tools"
+    | "providers"
+    | "cliRegistrars"
+    | "services"
+    | "httpRoutes"
+    | "gatewayHandlers"
   >,
   entry: PluginHttpRouteRegistration,
 ): void {
@@ -282,7 +411,13 @@ export function removeExtensionHostHttpRoute(
 export function setExtensionHostGatewayHandler(params: {
   registry: Pick<
     PluginRegistry,
-    "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+    | "channels"
+    | "tools"
+    | "providers"
+    | "cliRegistrars"
+    | "services"
+    | "httpRoutes"
+    | "gatewayHandlers"
   >;
   method: string;
   handler: GatewayRequestHandlers[string];
@@ -297,7 +432,13 @@ export function setExtensionHostGatewayHandler(params: {
 export function addExtensionHostCliRegistration(
   registry: Pick<
     PluginRegistry,
-    "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+    | "channels"
+    | "tools"
+    | "providers"
+    | "cliRegistrars"
+    | "services"
+    | "httpRoutes"
+    | "gatewayHandlers"
   >,
   entry: PluginCliRegistration,
 ): void {
@@ -311,7 +452,13 @@ export function addExtensionHostCliRegistration(
 export function addExtensionHostServiceRegistration(
   registry: Pick<
     PluginRegistry,
-    "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+    | "channels"
+    | "tools"
+    | "providers"
+    | "cliRegistrars"
+    | "services"
+    | "httpRoutes"
+    | "gatewayHandlers"
   >,
   entry: PluginServiceRegistration,
 ): void {
@@ -325,7 +472,13 @@ export function addExtensionHostServiceRegistration(
 export function addExtensionHostToolRegistration(
   registry: Pick<
     PluginRegistry,
-    "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+    | "channels"
+    | "tools"
+    | "providers"
+    | "cliRegistrars"
+    | "services"
+    | "httpRoutes"
+    | "gatewayHandlers"
   >,
   entry: PluginToolRegistration,
 ): void {
@@ -339,7 +492,13 @@ export function addExtensionHostToolRegistration(
 export function addExtensionHostProviderRegistration(
   registry: Pick<
     PluginRegistry,
-    "tools" | "providers" | "cliRegistrars" | "services" | "httpRoutes" | "gatewayHandlers"
+    | "channels"
+    | "tools"
+    | "providers"
+    | "cliRegistrars"
+    | "services"
+    | "httpRoutes"
+    | "gatewayHandlers"
   >,
   entry: PluginProviderRegistration,
 ): void {
@@ -349,3 +508,23 @@ export function addExtensionHostProviderRegistration(
   state.providers.push(entry);
   syncLegacyProviders(state);
 }
+
+export function addExtensionHostChannelRegistration(
+  registry: Pick<
+    PluginRegistry,
+    | "channels"
+    | "tools"
+    | "providers"
+    | "cliRegistrars"
+    | "services"
+    | "httpRoutes"
+    | "gatewayHandlers"
+  >,
+  entry: PluginChannelRegistration,
+): void {
+  const state = ensureExtensionHostRuntimeRegistryState(
+    registry as RuntimeRegistryBackedPluginRegistry,
+  );
+  state.channels.push(entry);
+  syncLegacyChannels(state);
+}