fix: make node-llama-cpp optional

src/memory/embeddings.test.ts

@@ -14,6 +14,7 @@ const createFetchMock = () =>
 describe("embedding provider remote overrides", () => {
   afterEach(() => {
     vi.resetAllMocks();
+    vi.resetModules();
     vi.unstubAllGlobals();
   });
 
@@ -107,3 +108,63 @@ describe("embedding provider remote overrides", () => {
     expect(headers.Authorization).toBe("Bearer provider-key");
   });
 });
+
+describe("embedding provider local fallback", () => {
+  afterEach(() => {
+    vi.resetAllMocks();
+    vi.resetModules();
+    vi.unstubAllGlobals();
+    vi.doUnmock("./node-llama.js");
+  });
+
+  it("falls back to openai when node-llama-cpp is missing", async () => {
+    vi.doMock("./node-llama.js", () => ({
+      importNodeLlamaCpp: async () => {
+        throw Object.assign(new Error("Cannot find package 'node-llama-cpp'"), {
+          code: "ERR_MODULE_NOT_FOUND",
+        });
+      },
+    }));
+
+    const fetchMock = createFetchMock();
+    vi.stubGlobal("fetch", fetchMock);
+
+    const { createEmbeddingProvider } = await import("./embeddings.js");
+    const authModule = await import("../agents/model-auth.js");
+    vi.mocked(authModule.resolveApiKeyForProvider).mockResolvedValue({
+      apiKey: "provider-key",
+    });
+
+    const result = await createEmbeddingProvider({
+      config: {} as never,
+      provider: "local",
+      model: "text-embedding-3-small",
+      fallback: "openai",
+    });
+
+    expect(result.provider.id).toBe("openai");
+    expect(result.fallbackFrom).toBe("local");
+    expect(result.fallbackReason).toContain("node-llama-cpp");
+  });
+
+  it("throws a helpful error when local is requested and fallback is none", async () => {
+    vi.doMock("./node-llama.js", () => ({
+      importNodeLlamaCpp: async () => {
+        throw Object.assign(new Error("Cannot find package 'node-llama-cpp'"), {
+          code: "ERR_MODULE_NOT_FOUND",
+        });
+      },
+    }));
+
+    const { createEmbeddingProvider } = await import("./embeddings.js");
+
+    await expect(
+      createEmbeddingProvider({
+        config: {} as never,
+        provider: "local",
+        model: "text-embedding-3-small",
+        fallback: "none",
+      }),
+    ).rejects.toThrow(/optional dependency node-llama-cpp/i);
+  });
+});