diff --git a/src/plugin-sdk/discord-runtime-surface.ts b/src/plugin-sdk/discord-runtime-surface.ts
new file mode 100644
index 00000000000..76bcf501d93
--- /dev/null
+++ b/src/plugin-sdk/discord-runtime-surface.ts
@@ -0,0 +1,185 @@
+import {
+  createLazyFacadeObjectValue,
+  loadBundledPluginPublicSurfaceModuleSync,
+} from "./facade-runtime.js";
+
+type DiscordRuntimeModule = typeof import("../../extensions/discord/runtime-api.js");
+
+type DiscordRuntimeSurface = Pick<
+  DiscordRuntimeModule,
+  | "auditDiscordChannelPermissions"
+  | "createThreadDiscord"
+  | "deleteMessageDiscord"
+  | "discordMessageActions"
+  | "editChannelDiscord"
+  | "editMessageDiscord"
+  | "getThreadBindingManager"
+  | "listDiscordDirectoryGroupsLive"
+  | "listDiscordDirectoryPeersLive"
+  | "monitorDiscordProvider"
+  | "pinMessageDiscord"
+  | "probeDiscord"
+  | "resolveDiscordChannelAllowlist"
+  | "resolveDiscordUserAllowlist"
+  | "resolveThreadBindingIdleTimeoutMs"
+  | "resolveThreadBindingInactivityExpiresAt"
+  | "resolveThreadBindingMaxAgeExpiresAt"
+  | "resolveThreadBindingMaxAgeMs"
+  | "sendDiscordComponentMessage"
+  | "sendMessageDiscord"
+  | "sendPollDiscord"
+  | "sendTypingDiscord"
+  | "setThreadBindingIdleTimeoutBySessionKey"
+  | "setThreadBindingMaxAgeBySessionKey"
+  | "unbindThreadBindingsBySessionKey"
+  | "unpinMessageDiscord"
+>;
+
+function loadDiscordRuntimeSurface(): DiscordRuntimeSurface {
+  return loadBundledPluginPublicSurfaceModuleSync<DiscordRuntimeSurface>({
+    dirName: "discord",
+    artifactBasename: "runtime-api.js",
+  });
+}
+
+export const discordMessageActions: DiscordRuntimeModule["discordMessageActions"] =
+  createLazyFacadeObjectValue(() => loadDiscordRuntimeSurface().discordMessageActions);
+
+export const auditDiscordChannelPermissions: DiscordRuntimeModule["auditDiscordChannelPermissions"] =
+  ((...args) =>
+    loadDiscordRuntimeSurface().auditDiscordChannelPermissions(
+      ...args,
+    )) as DiscordRuntimeModule["auditDiscordChannelPermissions"];
+
+export const createThreadDiscord: DiscordRuntimeModule["createThreadDiscord"] = ((...args) =>
+  loadDiscordRuntimeSurface().createThreadDiscord(
+    ...args,
+  )) as DiscordRuntimeModule["createThreadDiscord"];
+
+export const deleteMessageDiscord: DiscordRuntimeModule["deleteMessageDiscord"] = ((...args) =>
+  loadDiscordRuntimeSurface().deleteMessageDiscord(
+    ...args,
+  )) as DiscordRuntimeModule["deleteMessageDiscord"];
+
+export const editChannelDiscord: DiscordRuntimeModule["editChannelDiscord"] = ((...args) =>
+  loadDiscordRuntimeSurface().editChannelDiscord(
+    ...args,
+  )) as DiscordRuntimeModule["editChannelDiscord"];
+
+export const editMessageDiscord: DiscordRuntimeModule["editMessageDiscord"] = ((...args) =>
+  loadDiscordRuntimeSurface().editMessageDiscord(
+    ...args,
+  )) as DiscordRuntimeModule["editMessageDiscord"];
+
+export const getThreadBindingManager: DiscordRuntimeModule["getThreadBindingManager"] = ((
+  ...args
+) =>
+  loadDiscordRuntimeSurface().getThreadBindingManager(
+    ...args,
+  )) as DiscordRuntimeModule["getThreadBindingManager"];
+
+export const listDiscordDirectoryGroupsLive: DiscordRuntimeModule["listDiscordDirectoryGroupsLive"] =
+  ((...args) =>
+    loadDiscordRuntimeSurface().listDiscordDirectoryGroupsLive(
+      ...args,
+    )) as DiscordRuntimeModule["listDiscordDirectoryGroupsLive"];
+
+export const listDiscordDirectoryPeersLive: DiscordRuntimeModule["listDiscordDirectoryPeersLive"] =
+  ((...args) =>
+    loadDiscordRuntimeSurface().listDiscordDirectoryPeersLive(
+      ...args,
+    )) as DiscordRuntimeModule["listDiscordDirectoryPeersLive"];
+
+export const monitorDiscordProvider: DiscordRuntimeModule["monitorDiscordProvider"] = ((...args) =>
+  loadDiscordRuntimeSurface().monitorDiscordProvider(
+    ...args,
+  )) as DiscordRuntimeModule["monitorDiscordProvider"];
+
+export const pinMessageDiscord: DiscordRuntimeModule["pinMessageDiscord"] = ((...args) =>
+  loadDiscordRuntimeSurface().pinMessageDiscord(
+    ...args,
+  )) as DiscordRuntimeModule["pinMessageDiscord"];
+
+export const probeDiscord: DiscordRuntimeModule["probeDiscord"] = ((...args) =>
+  loadDiscordRuntimeSurface().probeDiscord(...args)) as DiscordRuntimeModule["probeDiscord"];
+
+export const resolveDiscordChannelAllowlist: DiscordRuntimeModule["resolveDiscordChannelAllowlist"] =
+  ((...args) =>
+    loadDiscordRuntimeSurface().resolveDiscordChannelAllowlist(
+      ...args,
+    )) as DiscordRuntimeModule["resolveDiscordChannelAllowlist"];
+
+export const resolveDiscordUserAllowlist: DiscordRuntimeModule["resolveDiscordUserAllowlist"] = ((
+  ...args
+) =>
+  loadDiscordRuntimeSurface().resolveDiscordUserAllowlist(
+    ...args,
+  )) as DiscordRuntimeModule["resolveDiscordUserAllowlist"];
+
+export const resolveThreadBindingIdleTimeoutMs: DiscordRuntimeModule["resolveThreadBindingIdleTimeoutMs"] =
+  ((...args) =>
+    loadDiscordRuntimeSurface().resolveThreadBindingIdleTimeoutMs(
+      ...args,
+    )) as DiscordRuntimeModule["resolveThreadBindingIdleTimeoutMs"];
+
+export const resolveThreadBindingInactivityExpiresAt: DiscordRuntimeModule["resolveThreadBindingInactivityExpiresAt"] =
+  ((...args) =>
+    loadDiscordRuntimeSurface().resolveThreadBindingInactivityExpiresAt(
+      ...args,
+    )) as DiscordRuntimeModule["resolveThreadBindingInactivityExpiresAt"];
+
+export const resolveThreadBindingMaxAgeExpiresAt: DiscordRuntimeModule["resolveThreadBindingMaxAgeExpiresAt"] =
+  ((...args) =>
+    loadDiscordRuntimeSurface().resolveThreadBindingMaxAgeExpiresAt(
+      ...args,
+    )) as DiscordRuntimeModule["resolveThreadBindingMaxAgeExpiresAt"];
+
+export const resolveThreadBindingMaxAgeMs: DiscordRuntimeModule["resolveThreadBindingMaxAgeMs"] = ((
+  ...args
+) =>
+  loadDiscordRuntimeSurface().resolveThreadBindingMaxAgeMs(
+    ...args,
+  )) as DiscordRuntimeModule["resolveThreadBindingMaxAgeMs"];
+
+export const sendDiscordComponentMessage: DiscordRuntimeModule["sendDiscordComponentMessage"] = ((
+  ...args
+) =>
+  loadDiscordRuntimeSurface().sendDiscordComponentMessage(
+    ...args,
+  )) as DiscordRuntimeModule["sendDiscordComponentMessage"];
+
+export const sendMessageDiscord: DiscordRuntimeModule["sendMessageDiscord"] = ((...args) =>
+  loadDiscordRuntimeSurface().sendMessageDiscord(
+    ...args,
+  )) as DiscordRuntimeModule["sendMessageDiscord"];
+
+export const sendPollDiscord: DiscordRuntimeModule["sendPollDiscord"] = ((...args) =>
+  loadDiscordRuntimeSurface().sendPollDiscord(...args)) as DiscordRuntimeModule["sendPollDiscord"];
+
+export const sendTypingDiscord: DiscordRuntimeModule["sendTypingDiscord"] = ((...args) =>
+  loadDiscordRuntimeSurface().sendTypingDiscord(
+    ...args,
+  )) as DiscordRuntimeModule["sendTypingDiscord"];
+
+export const setThreadBindingIdleTimeoutBySessionKey: DiscordRuntimeModule["setThreadBindingIdleTimeoutBySessionKey"] =
+  ((...args) =>
+    loadDiscordRuntimeSurface().setThreadBindingIdleTimeoutBySessionKey(
+      ...args,
+    )) as DiscordRuntimeModule["setThreadBindingIdleTimeoutBySessionKey"];
+
+export const setThreadBindingMaxAgeBySessionKey: DiscordRuntimeModule["setThreadBindingMaxAgeBySessionKey"] =
+  ((...args) =>
+    loadDiscordRuntimeSurface().setThreadBindingMaxAgeBySessionKey(
+      ...args,
+    )) as DiscordRuntimeModule["setThreadBindingMaxAgeBySessionKey"];
+
+export const unbindThreadBindingsBySessionKey: DiscordRuntimeModule["unbindThreadBindingsBySessionKey"] =
+  ((...args) =>
+    loadDiscordRuntimeSurface().unbindThreadBindingsBySessionKey(
+      ...args,
+    )) as DiscordRuntimeModule["unbindThreadBindingsBySessionKey"];
+
+export const unpinMessageDiscord: DiscordRuntimeModule["unpinMessageDiscord"] = ((...args) =>
+  loadDiscordRuntimeSurface().unpinMessageDiscord(
+    ...args,
+  )) as DiscordRuntimeModule["unpinMessageDiscord"];
diff --git a/src/plugin-sdk/signal-runtime-surface.ts b/src/plugin-sdk/signal-runtime-surface.ts
new file mode 100644
index 00000000000..7a6768ffbe2
--- /dev/null
+++ b/src/plugin-sdk/signal-runtime-surface.ts
@@ -0,0 +1,34 @@
+import {
+  createLazyFacadeObjectValue,
+  loadBundledPluginPublicSurfaceModuleSync,
+} from "./facade-runtime.js";
+
+type SignalRuntimeModule = typeof import("../../extensions/signal/runtime-api.js");
+
+type SignalRuntimeSurface = Pick<
+  SignalRuntimeModule,
+  "monitorSignalProvider" | "probeSignal" | "sendMessageSignal" | "signalMessageActions"
+>;
+
+function loadSignalRuntimeSurface(): SignalRuntimeSurface {
+  return loadBundledPluginPublicSurfaceModuleSync<SignalRuntimeSurface>({
+    dirName: "signal",
+    artifactBasename: "runtime-api.js",
+  });
+}
+
+export const signalMessageActions: SignalRuntimeModule["signalMessageActions"] =
+  createLazyFacadeObjectValue(() => loadSignalRuntimeSurface().signalMessageActions);
+
+export const monitorSignalProvider: SignalRuntimeModule["monitorSignalProvider"] = ((...args) =>
+  loadSignalRuntimeSurface().monitorSignalProvider(
+    ...args,
+  )) as SignalRuntimeModule["monitorSignalProvider"];
+
+export const probeSignal: SignalRuntimeModule["probeSignal"] = ((...args) =>
+  loadSignalRuntimeSurface().probeSignal(...args)) as SignalRuntimeModule["probeSignal"];
+
+export const sendMessageSignal: SignalRuntimeModule["sendMessageSignal"] = ((...args) =>
+  loadSignalRuntimeSurface().sendMessageSignal(
+    ...args,
+  )) as SignalRuntimeModule["sendMessageSignal"];
diff --git a/src/plugin-sdk/slack-runtime-surface.ts b/src/plugin-sdk/slack-runtime-surface.ts
new file mode 100644
index 00000000000..c49d57766e0
--- /dev/null
+++ b/src/plugin-sdk/slack-runtime-surface.ts
@@ -0,0 +1,64 @@
+import { loadBundledPluginPublicSurfaceModuleSync } from "./facade-runtime.js";
+
+type SlackRuntimeModule = typeof import("../../extensions/slack/runtime-api.js");
+
+type SlackRuntimeSurface = Pick<
+  SlackRuntimeModule,
+  | "handleSlackAction"
+  | "listSlackDirectoryGroupsLive"
+  | "listSlackDirectoryPeersLive"
+  | "monitorSlackProvider"
+  | "probeSlack"
+  | "resolveSlackChannelAllowlist"
+  | "resolveSlackUserAllowlist"
+  | "sendMessageSlack"
+>;
+
+function loadSlackRuntimeSurface(): SlackRuntimeSurface {
+  return loadBundledPluginPublicSurfaceModuleSync<SlackRuntimeSurface>({
+    dirName: "slack",
+    artifactBasename: "runtime-api.js",
+  });
+}
+
+export const handleSlackAction: SlackRuntimeModule["handleSlackAction"] = ((...args) =>
+  loadSlackRuntimeSurface().handleSlackAction(...args)) as SlackRuntimeModule["handleSlackAction"];
+
+export const listSlackDirectoryGroupsLive: SlackRuntimeModule["listSlackDirectoryGroupsLive"] = ((
+  ...args
+) =>
+  loadSlackRuntimeSurface().listSlackDirectoryGroupsLive(
+    ...args,
+  )) as SlackRuntimeModule["listSlackDirectoryGroupsLive"];
+
+export const listSlackDirectoryPeersLive: SlackRuntimeModule["listSlackDirectoryPeersLive"] = ((
+  ...args
+) =>
+  loadSlackRuntimeSurface().listSlackDirectoryPeersLive(
+    ...args,
+  )) as SlackRuntimeModule["listSlackDirectoryPeersLive"];
+
+export const monitorSlackProvider: SlackRuntimeModule["monitorSlackProvider"] = ((...args) =>
+  loadSlackRuntimeSurface().monitorSlackProvider(
+    ...args,
+  )) as SlackRuntimeModule["monitorSlackProvider"];
+
+export const probeSlack: SlackRuntimeModule["probeSlack"] = ((...args) =>
+  loadSlackRuntimeSurface().probeSlack(...args)) as SlackRuntimeModule["probeSlack"];
+
+export const resolveSlackChannelAllowlist: SlackRuntimeModule["resolveSlackChannelAllowlist"] = ((
+  ...args
+) =>
+  loadSlackRuntimeSurface().resolveSlackChannelAllowlist(
+    ...args,
+  )) as SlackRuntimeModule["resolveSlackChannelAllowlist"];
+
+export const resolveSlackUserAllowlist: SlackRuntimeModule["resolveSlackUserAllowlist"] = ((
+  ...args
+) =>
+  loadSlackRuntimeSurface().resolveSlackUserAllowlist(
+    ...args,
+  )) as SlackRuntimeModule["resolveSlackUserAllowlist"];
+
+export const sendMessageSlack: SlackRuntimeModule["sendMessageSlack"] = ((...args) =>
+  loadSlackRuntimeSurface().sendMessageSlack(...args)) as SlackRuntimeModule["sendMessageSlack"];
diff --git a/src/plugins/runtime/runtime-channel.ts b/src/plugins/runtime/runtime-channel.ts
index f1d2b47cdf8..fd336b35766 100644
--- a/src/plugins/runtime/runtime-channel.ts
+++ b/src/plugins/runtime/runtime-channel.ts
@@ -1,7 +1,3 @@
-import {
-  setThreadBindingIdleTimeoutBySessionKey,
-  setThreadBindingMaxAgeBySessionKey,
-} from "../../../extensions/discord/runtime-api.js";
 import { resolveEffectiveMessagesConfig, resolveHumanDelayConfig } from "../../agents/identity.js";
 import {
   chunkByNewline,
@@ -65,6 +61,10 @@ import {
   readChannelAllowFromStore,
   upsertChannelPairingRequest,
 } from "../../pairing/pairing-store.js";
+import {
+  setThreadBindingIdleTimeoutBySessionKey,
+  setThreadBindingMaxAgeBySessionKey,
+} from "../../plugin-sdk/discord-runtime-surface.js";
 import { buildAgentSessionKey, resolveAgentRoute } from "../../routing/resolve-route.js";
 import { defineCachedValue } from "./runtime-cache.js";
 import { createRuntimeDiscord } from "./runtime-discord.js";
diff --git a/src/plugins/runtime/runtime-discord-ops.runtime.ts b/src/plugins/runtime/runtime-discord-ops.runtime.ts
index 7e12c6e1036..9afadcbdcb8 100644
--- a/src/plugins/runtime/runtime-discord-ops.runtime.ts
+++ b/src/plugins/runtime/runtime-discord-ops.runtime.ts
@@ -16,7 +16,7 @@ import {
   sendPollDiscord as sendPollDiscordImpl,
   sendTypingDiscord as sendTypingDiscordImpl,
   unpinMessageDiscord as unpinMessageDiscordImpl,
-} from "../../../extensions/discord/runtime-api.js";
+} from "../../plugin-sdk/discord-runtime-surface.js";
 import type { PluginRuntimeChannel } from "./types-channel.js";
 
 type RuntimeDiscordOps = Pick<
diff --git a/src/plugins/runtime/runtime-discord.ts b/src/plugins/runtime/runtime-discord.ts
index 8264a7f04df..3841a47d2b6 100644
--- a/src/plugins/runtime/runtime-discord.ts
+++ b/src/plugins/runtime/runtime-discord.ts
@@ -1,5 +1,5 @@
-import { discordMessageActions } from "../../../extensions/discord/runtime-api.js";
 import {
+  discordMessageActions,
   getThreadBindingManager,
   resolveThreadBindingIdleTimeoutMs,
   resolveThreadBindingInactivityExpiresAt,
@@ -8,7 +8,7 @@ import {
   setThreadBindingIdleTimeoutBySessionKey,
   setThreadBindingMaxAgeBySessionKey,
   unbindThreadBindingsBySessionKey,
-} from "../../../extensions/discord/runtime-api.js";
+} from "../../plugin-sdk/discord-runtime-surface.js";
 import {
   createLazyRuntimeMethodBinder,
   createLazyRuntimeSurface,
diff --git a/src/plugins/runtime/runtime-signal.ts b/src/plugins/runtime/runtime-signal.ts
index 5eade131012..3489ecc0b65 100644
--- a/src/plugins/runtime/runtime-signal.ts
+++ b/src/plugins/runtime/runtime-signal.ts
@@ -3,7 +3,7 @@ import {
   probeSignal,
   signalMessageActions,
   sendMessageSignal,
-} from "../../../extensions/signal/runtime-api.js";
+} from "../../plugin-sdk/signal-runtime-surface.js";
 import type { PluginRuntimeChannel } from "./types-channel.js";
 
 export function createRuntimeSignal(): PluginRuntimeChannel["signal"] {
diff --git a/src/plugins/runtime/runtime-slack-ops.runtime.ts b/src/plugins/runtime/runtime-slack-ops.runtime.ts
index ec534c0b224..33e0c673bf1 100644
--- a/src/plugins/runtime/runtime-slack-ops.runtime.ts
+++ b/src/plugins/runtime/runtime-slack-ops.runtime.ts
@@ -7,7 +7,7 @@ import {
   resolveSlackUserAllowlist as resolveSlackUserAllowlistImpl,
   sendMessageSlack as sendMessageSlackImpl,
   handleSlackAction as handleSlackActionImpl,
-} from "../../../extensions/slack/runtime-api.js";
+} from "../../plugin-sdk/slack-runtime-surface.js";
 import type { PluginRuntimeChannel } from "./types-channel.js";
 
 type RuntimeSlackOps = Pick<