diff --git a/src/extension-host/media-runtime-api.test.ts b/src/extension-host/media-runtime-api.test.ts
new file mode 100644
index 00000000000..04e4171ab74
--- /dev/null
+++ b/src/extension-host/media-runtime-api.test.ts
@@ -0,0 +1,140 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import {
+  buildExtensionHostMediaProviderRegistry,
+  normalizeExtensionHostMediaAttachments,
+  resolveExtensionHostAutoImageModel,
+  resolveExtensionHostMediaAttachmentLocalRoots,
+  runExtensionHostMediaApiCapability,
+} from "./media-runtime-api.js";
+
+vi.mock("./media-runtime-auto.js", () => ({
+  clearMediaUnderstandingBinaryCacheForTests: vi.fn(),
+  resolveAutoImageModel: vi.fn(),
+}));
+
+vi.mock("./media-runtime-orchestration.js", () => ({
+  runCapability: vi.fn(),
+}));
+
+vi.mock("./media-runtime-registry.js", () => ({
+  buildExtensionHostMediaUnderstandingRegistry: vi.fn(),
+}));
+
+vi.mock("../media/inbound-path-policy.js", () => ({
+  mergeInboundPathRoots: vi.fn(),
+  resolveIMessageAttachmentRoots: vi.fn(),
+}));
+
+vi.mock("../media/local-roots.js", () => ({
+  getDefaultMediaLocalRoots: vi.fn(),
+}));
+
+vi.mock("../media-understanding/attachments.js", () => ({
+  MediaAttachmentCache: class MediaAttachmentCache {
+    constructor(
+      readonly attachments: unknown[],
+      readonly options?: unknown,
+    ) {}
+  },
+  normalizeAttachments: vi.fn(),
+}));
+
+describe("media-runtime-api", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it("delegates provider-registry construction to the host-owned registry", async () => {
+    const registryModule = await import("./media-runtime-registry.js");
+    const registry = new Map();
+    vi.mocked(registryModule.buildExtensionHostMediaUnderstandingRegistry).mockReturnValue(
+      registry,
+    );
+
+    expect(buildExtensionHostMediaProviderRegistry({ openai: {} as never })).toBe(registry);
+    expect(registryModule.buildExtensionHostMediaUnderstandingRegistry).toHaveBeenCalledWith({
+      openai: {} as never,
+    });
+  });
+
+  it("resolves local roots through the host-owned inbound-path policy", async () => {
+    const localRootsModule = await import("../media/local-roots.js");
+    const inboundPolicyModule = await import("../media/inbound-path-policy.js");
+
+    vi.mocked(localRootsModule.getDefaultMediaLocalRoots).mockReturnValue(["/tmp/openclaw"]);
+    vi.mocked(inboundPolicyModule.resolveIMessageAttachmentRoots).mockReturnValue(["/messages"]);
+    vi.mocked(inboundPolicyModule.mergeInboundPathRoots).mockReturnValue([
+      "/tmp/openclaw",
+      "/messages",
+    ]);
+
+    const roots = resolveExtensionHostMediaAttachmentLocalRoots({
+      cfg: { channels: { imessage: {} } } as never,
+      ctx: { AccountId: "primary" } as never,
+    });
+
+    expect(roots).toEqual(["/tmp/openclaw", "/messages"]);
+    expect(inboundPolicyModule.resolveIMessageAttachmentRoots).toHaveBeenCalledWith({
+      cfg: { channels: { imessage: {} } },
+      accountId: "primary",
+    });
+  });
+
+  it("injects the default registry when resolving the auto image model", async () => {
+    const registryModule = await import("./media-runtime-registry.js");
+    const autoModule = await import("./media-runtime-auto.js");
+    const registry = new Map();
+
+    vi.mocked(registryModule.buildExtensionHostMediaUnderstandingRegistry).mockReturnValue(
+      registry,
+    );
+    vi.mocked(autoModule.resolveAutoImageModel).mockResolvedValue({
+      provider: "openai",
+      model: "gpt-4.1",
+    });
+
+    await expect(
+      resolveExtensionHostAutoImageModel({
+        cfg: {} as never,
+      }),
+    ).resolves.toEqual({
+      provider: "openai",
+      model: "gpt-4.1",
+    });
+
+    expect(autoModule.resolveAutoImageModel).toHaveBeenCalledWith({
+      cfg: {},
+      providerRegistry: registry,
+    });
+  });
+
+  it("delegates top-level capability execution to the host-owned orchestration", async () => {
+    const orchestrationModule = await import("./media-runtime-orchestration.js");
+    const attachments = { cleanup: vi.fn() } as never;
+    const media = [{ kind: "image" }] as never;
+    const providerRegistry = new Map() as never;
+    const result = { outputs: [], decision: { capability: "image", outcome: "skipped" } } as never;
+
+    vi.mocked(orchestrationModule.runCapability).mockResolvedValue(result);
+
+    await expect(
+      runExtensionHostMediaApiCapability({
+        capability: "image",
+        cfg: {} as never,
+        ctx: {} as never,
+        attachments,
+        media,
+        providerRegistry,
+      }),
+    ).resolves.toBe(result);
+  });
+
+  it("delegates attachment normalization to the shared media attachment helper", async () => {
+    const attachmentsModule = await import("../media-understanding/attachments.js");
+    vi.mocked(attachmentsModule.normalizeAttachments).mockReturnValue([{ kind: "audio" }] as never);
+
+    expect(normalizeExtensionHostMediaAttachments({ MediaPath: "/tmp/test.wav" } as never)).toEqual(
+      [{ kind: "audio" }],
+    );
+  });
+});
diff --git a/src/extension-host/media-runtime-api.ts b/src/extension-host/media-runtime-api.ts
new file mode 100644
index 00000000000..2f108981f6b
--- /dev/null
+++ b/src/extension-host/media-runtime-api.ts
@@ -0,0 +1,95 @@
+import type { MsgContext } from "../auto-reply/templating.js";
+import type { OpenClawConfig } from "../config/config.js";
+import type { MediaUnderstandingConfig } from "../config/types.tools.js";
+import {
+  MediaAttachmentCache,
+  type MediaAttachmentCacheOptions,
+  normalizeAttachments,
+} from "../media-understanding/attachments.js";
+import type {
+  MediaAttachment,
+  MediaUnderstandingCapability,
+  MediaUnderstandingProvider,
+} from "../media-understanding/types.js";
+import {
+  mergeInboundPathRoots,
+  resolveIMessageAttachmentRoots,
+} from "../media/inbound-path-policy.js";
+import { getDefaultMediaLocalRoots } from "../media/local-roots.js";
+import {
+  clearMediaUnderstandingBinaryCacheForTests as clearExtensionHostMediaUnderstandingBinaryCacheForTests,
+  resolveAutoImageModel as resolveExtensionHostMediaRuntimeAutoImageModel,
+  type ActiveMediaModel,
+} from "./media-runtime-auto.js";
+import {
+  runCapability as runExtensionHostMediaCapability,
+  type RunCapabilityResult,
+} from "./media-runtime-orchestration.js";
+import {
+  buildExtensionHostMediaUnderstandingRegistry,
+  type ExtensionHostMediaUnderstandingProviderRegistry,
+} from "./media-runtime-registry.js";
+
+type ProviderRegistry = ExtensionHostMediaUnderstandingProviderRegistry;
+
+export type { ActiveMediaModel, RunCapabilityResult };
+export type ExtensionHostMediaProviderRegistry = ProviderRegistry;
+
+export function buildExtensionHostMediaProviderRegistry(
+  overrides?: Record<string, MediaUnderstandingProvider>,
+): ProviderRegistry {
+  return buildExtensionHostMediaUnderstandingRegistry(overrides);
+}
+
+export function normalizeExtensionHostMediaAttachments(ctx: MsgContext): MediaAttachment[] {
+  return normalizeAttachments(ctx);
+}
+
+export function resolveExtensionHostMediaAttachmentLocalRoots(params: {
+  cfg: OpenClawConfig;
+  ctx: MsgContext;
+}): readonly string[] {
+  return mergeInboundPathRoots(
+    getDefaultMediaLocalRoots(),
+    resolveIMessageAttachmentRoots({
+      cfg: params.cfg,
+      accountId: params.ctx.AccountId,
+    }),
+  );
+}
+
+export function createExtensionHostMediaAttachmentCache(
+  attachments: MediaAttachment[],
+  options?: MediaAttachmentCacheOptions,
+): MediaAttachmentCache {
+  return new MediaAttachmentCache(attachments, options);
+}
+
+export function clearExtensionHostMediaBinaryCacheForTests(): void {
+  clearExtensionHostMediaUnderstandingBinaryCacheForTests();
+}
+
+export async function resolveExtensionHostAutoImageModel(params: {
+  cfg: OpenClawConfig;
+  agentDir?: string;
+  activeModel?: ActiveMediaModel;
+}): Promise<ActiveMediaModel | null> {
+  return await resolveExtensionHostMediaRuntimeAutoImageModel({
+    ...params,
+    providerRegistry: buildExtensionHostMediaProviderRegistry(),
+  });
+}
+
+export async function runExtensionHostMediaApiCapability(params: {
+  capability: MediaUnderstandingCapability;
+  cfg: OpenClawConfig;
+  ctx: MsgContext;
+  attachments: MediaAttachmentCache;
+  media: MediaAttachment[];
+  agentDir?: string;
+  providerRegistry: ProviderRegistry;
+  config?: MediaUnderstandingConfig;
+  activeModel?: ActiveMediaModel;
+}): Promise<RunCapabilityResult> {
+  return await runExtensionHostMediaCapability(params);
+}
diff --git a/src/extension-host/media-runtime-entrypoints.ts b/src/extension-host/media-runtime-entrypoints.ts
new file mode 100644
index 00000000000..becd4d667ac
--- /dev/null
+++ b/src/extension-host/media-runtime-entrypoints.ts
@@ -0,0 +1,42 @@
+import type { MsgContext } from "../auto-reply/templating.js";
+import type { OpenClawConfig } from "../config/config.js";
+import type {
+  MediaUnderstandingConfig,
+  MediaUnderstandingModelConfig,
+} from "../config/types.tools.js";
+import type { MediaAttachmentCache } from "../media-understanding/attachments.js";
+import type {
+  MediaUnderstandingCapability,
+  MediaUnderstandingOutput,
+  MediaUnderstandingProvider,
+} from "../media-understanding/types.js";
+
+export type ExtensionHostMediaProviderRegistry = Map<string, MediaUnderstandingProvider>;
+
+export async function runExtensionHostMediaProviderEntry(params: {
+  capability: MediaUnderstandingCapability;
+  entry: MediaUnderstandingModelConfig;
+  cfg: OpenClawConfig;
+  ctx: MsgContext;
+  attachmentIndex: number;
+  cache: MediaAttachmentCache;
+  agentDir?: string;
+  providerRegistry: ExtensionHostMediaProviderRegistry;
+  config?: MediaUnderstandingConfig;
+}): Promise<MediaUnderstandingOutput | null> {
+  const runtime = await import("./media-runtime-execution.js");
+  return runtime.runProviderEntry(params);
+}
+
+export async function runExtensionHostMediaCliEntry(params: {
+  capability: MediaUnderstandingCapability;
+  entry: MediaUnderstandingModelConfig;
+  cfg: OpenClawConfig;
+  ctx: MsgContext;
+  attachmentIndex: number;
+  cache: MediaAttachmentCache;
+  config?: MediaUnderstandingConfig;
+}): Promise<MediaUnderstandingOutput | null> {
+  const runtime = await import("./media-runtime-execution.js");
+  return runtime.runCliEntry(params);
+}
diff --git a/src/extension-host/media-runtime-orchestration.ts b/src/extension-host/media-runtime-orchestration.ts
index 5bc6f4ce47b..63c8876410f 100644
--- a/src/extension-host/media-runtime-orchestration.ts
+++ b/src/extension-host/media-runtime-orchestration.ts
@@ -12,7 +12,6 @@ import type {
 import { logVerbose, shouldLogVerbose } from "../globals.js";
 import { MediaAttachmentCache, selectAttachments } from "../media-understanding/attachments.js";
 import { isMediaUnderstandingSkipError } from "../media-understanding/errors.js";
-import { runCliEntry, runProviderEntry } from "../media-understanding/runner.entries.js";
 import type {
   MediaAttachment,
   MediaUnderstandingCapability,
@@ -24,6 +23,10 @@ import type {
 import { resolveAutoEntries, type ActiveMediaModel } from "./media-runtime-auto.js";
 import { resolveModelEntries, resolveScopeDecision } from "./media-runtime-config.js";
 import { buildModelDecision, formatDecisionSummary } from "./media-runtime-decision.js";
+import {
+  runExtensionHostMediaCliEntry,
+  runExtensionHostMediaProviderEntry,
+} from "./media-runtime-entrypoints.js";
 
 type ProviderRegistry = Map<string, MediaUnderstandingProvider>;
 
@@ -53,7 +56,7 @@ async function runAttachmentEntries(params: {
     try {
       const result =
         entryType === "cli"
-          ? await runCliEntry({
+          ? await runExtensionHostMediaCliEntry({
               capability,
               entry,
               cfg: params.cfg,
@@ -62,7 +65,7 @@ async function runAttachmentEntries(params: {
               cache: params.cache,
               config: params.config,
             })
-          : await runProviderEntry({
+          : await runExtensionHostMediaProviderEntry({
               capability,
               entry,
               cfg: params.cfg,
diff --git a/src/media-understanding/runner.entries.ts b/src/media-understanding/runner.entries.ts
index 0c8a079290c..7d649e9574a 100644
--- a/src/media-understanding/runner.entries.ts
+++ b/src/media-understanding/runner.entries.ts
@@ -1,42 +1,9 @@
-import type { MsgContext } from "../auto-reply/templating.js";
-import type { OpenClawConfig } from "../config/config.js";
-import type {
-  MediaUnderstandingConfig,
-  MediaUnderstandingModelConfig,
-} from "../config/types.tools.js";
 export {
   buildModelDecision,
   formatDecisionSummary,
 } from "../extension-host/media-runtime-decision.js";
-import type { MediaAttachmentCache } from "./attachments.js";
-import type { MediaUnderstandingCapability, MediaUnderstandingOutput } from "./types.js";
-
-export type ProviderRegistry = Map<string, import("./types.js").MediaUnderstandingProvider>;
-
-export async function runProviderEntry(params: {
-  capability: MediaUnderstandingCapability;
-  entry: MediaUnderstandingModelConfig;
-  cfg: OpenClawConfig;
-  ctx: MsgContext;
-  attachmentIndex: number;
-  cache: MediaAttachmentCache;
-  agentDir?: string;
-  providerRegistry: ProviderRegistry;
-  config?: MediaUnderstandingConfig;
-}): Promise<MediaUnderstandingOutput | null> {
-  const runtime = await import("../extension-host/media-runtime-execution.js");
-  return runtime.runProviderEntry(params);
-}
-
-export async function runCliEntry(params: {
-  capability: MediaUnderstandingCapability;
-  entry: MediaUnderstandingModelConfig;
-  cfg: OpenClawConfig;
-  ctx: MsgContext;
-  attachmentIndex: number;
-  cache: MediaAttachmentCache;
-  config?: MediaUnderstandingConfig;
-}): Promise<MediaUnderstandingOutput | null> {
-  const runtime = await import("../extension-host/media-runtime-execution.js");
-  return runtime.runCliEntry(params);
-}
+export {
+  runExtensionHostMediaCliEntry as runCliEntry,
+  runExtensionHostMediaProviderEntry as runProviderEntry,
+  type ExtensionHostMediaProviderRegistry as ProviderRegistry,
+} from "../extension-host/media-runtime-entrypoints.js";
diff --git a/src/media-understanding/runner.ts b/src/media-understanding/runner.ts
index 4cf2a923e9c..0858f73b5c0 100644
--- a/src/media-understanding/runner.ts
+++ b/src/media-understanding/runner.ts
@@ -1,94 +1,17 @@
-import type { MsgContext } from "../auto-reply/templating.js";
-import type { OpenClawConfig } from "../config/config.js";
-import type { MediaUnderstandingConfig } from "../config/types.tools.js";
-import {
-  clearMediaUnderstandingBinaryCacheForTests as clearExtensionHostMediaUnderstandingBinaryCacheForTests,
-  resolveAutoImageModel as resolveExtensionHostAutoImageModel,
+export {
+  buildExtensionHostMediaProviderRegistry as buildProviderRegistry,
+  clearExtensionHostMediaBinaryCacheForTests as clearMediaUnderstandingBinaryCacheForTests,
+  createExtensionHostMediaAttachmentCache as createMediaAttachmentCache,
+  normalizeExtensionHostMediaAttachments as normalizeMediaAttachments,
+  resolveExtensionHostAutoImageModel as resolveAutoImageModel,
+  resolveExtensionHostMediaAttachmentLocalRoots as resolveMediaAttachmentLocalRoots,
+  runExtensionHostMediaApiCapability as runCapability,
   type ActiveMediaModel,
-} from "../extension-host/media-runtime-auto.js";
-import {
-  runCapability as runExtensionHostMediaCapability,
+  type ExtensionHostMediaProviderRegistry as ProviderRegistry,
   type RunCapabilityResult,
-} from "../extension-host/media-runtime-orchestration.js";
-import {
-  buildExtensionHostMediaUnderstandingRegistry,
-  type ExtensionHostMediaUnderstandingProviderRegistry,
-} from "../extension-host/media-runtime-registry.js";
-import {
-  mergeInboundPathRoots,
-  resolveIMessageAttachmentRoots,
-} from "../media/inbound-path-policy.js";
-import { getDefaultMediaLocalRoots } from "../media/local-roots.js";
-import {
-  MediaAttachmentCache,
-  type MediaAttachmentCacheOptions,
-  normalizeAttachments,
-} from "./attachments.js";
-import type {
+} from "../extension-host/media-runtime-api.js";
+export type {
   MediaAttachment,
   MediaUnderstandingCapability,
   MediaUnderstandingProvider,
 } from "./types.js";
-
-type ProviderRegistry = ExtensionHostMediaUnderstandingProviderRegistry;
-
-export type { ActiveMediaModel, RunCapabilityResult };
-
-export function buildProviderRegistry(
-  overrides?: Record<string, MediaUnderstandingProvider>,
-): ProviderRegistry {
-  return buildExtensionHostMediaUnderstandingRegistry(overrides);
-}
-
-export function normalizeMediaAttachments(ctx: MsgContext): MediaAttachment[] {
-  return normalizeAttachments(ctx);
-}
-
-export function resolveMediaAttachmentLocalRoots(params: {
-  cfg: OpenClawConfig;
-  ctx: MsgContext;
-}): readonly string[] {
-  return mergeInboundPathRoots(
-    getDefaultMediaLocalRoots(),
-    resolveIMessageAttachmentRoots({
-      cfg: params.cfg,
-      accountId: params.ctx.AccountId,
-    }),
-  );
-}
-
-export function createMediaAttachmentCache(
-  attachments: MediaAttachment[],
-  options?: MediaAttachmentCacheOptions,
-): MediaAttachmentCache {
-  return new MediaAttachmentCache(attachments, options);
-}
-
-export function clearMediaUnderstandingBinaryCacheForTests(): void {
-  clearExtensionHostMediaUnderstandingBinaryCacheForTests();
-}
-
-export async function resolveAutoImageModel(params: {
-  cfg: OpenClawConfig;
-  agentDir?: string;
-  activeModel?: ActiveMediaModel;
-}): Promise<ActiveMediaModel | null> {
-  return await resolveExtensionHostAutoImageModel({
-    ...params,
-    providerRegistry: buildProviderRegistry(),
-  });
-}
-
-export async function runCapability(params: {
-  capability: MediaUnderstandingCapability;
-  cfg: OpenClawConfig;
-  ctx: MsgContext;
-  attachments: MediaAttachmentCache;
-  media: MediaAttachment[];
-  agentDir?: string;
-  providerRegistry: ProviderRegistry;
-  config?: MediaUnderstandingConfig;
-  activeModel?: ActiveMediaModel;
-}): Promise<RunCapabilityResult> {
-  return await runExtensionHostMediaCapability(params);
-}