feat(mem0-ts): add LM Studio embedder and LLM support (#4354)

Co-authored-by: utkarsh240799 <utkarsh240799@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mem0-ts/src/oss/tests/lmstudio-embedder.test.ts

@@ -0,0 +1,83 @@
+/// <reference types="jest" />
+/**
+ * LM Studio Embedder — unit tests (mocked OpenAI).
+ */
+
+import { LMStudioEmbedder } from "../src/embeddings/lmstudio";
+
+const mockEmbedding = [0.1, 0.2, 0.3, 0.4, 0.5];
+const mockCreate = jest.fn().mockResolvedValue({
+  data: [{ embedding: mockEmbedding }],
+});
+
+jest.mock("openai", () => {
+  return jest.fn().mockImplementation(() => ({
+    embeddings: { create: mockCreate },
+  }));
+});
+
+describe("LMStudioEmbedder (unit)", () => {
+  beforeEach(() => mockCreate.mockClear());
+
+  it("embed() calls OpenAI with encoding_format float and returns vector", async () => {
+    const embedder = new LMStudioEmbedder({
+      model: "nomic-embed-text-v1.5-GGUF",
+      baseURL: "http://localhost:1234/v1",
+    });
+
+    const result = await embedder.embed("Sample text to embed.");
+
+    expect(mockCreate).toHaveBeenCalledTimes(1);
+    expect(mockCreate.mock.calls[0][0]).toEqual({
+      model: "nomic-embed-text-v1.5-GGUF",
+      input: "Sample text to embed.",
+      encoding_format: "float",
+    });
+    expect(result).toEqual(mockEmbedding);
+  });
+
+  it("embed() normalizes newlines", async () => {
+    const embedder = new LMStudioEmbedder({
+      model: "test-model",
+      baseURL: "http://localhost:1234/v1",
+    });
+
+    await embedder.embed("Line one\nLine two");
+
+    expect(mockCreate.mock.calls[0][0].input).toBe("Line one Line two");
+  });
+
+  it("embed() wraps API errors with a clear message", async () => {
+    mockCreate.mockRejectedValueOnce(new Error("Connection refused"));
+
+    const embedder = new LMStudioEmbedder({
+      model: "test-model",
+      baseURL: "http://localhost:1234/v1",
+    });
+
+    await expect(embedder.embed("text")).rejects.toThrow(
+      "LM Studio embedder failed: Connection refused",
+    );
+  });
+
+  it("embedBatch() returns vectors for multiple inputs", async () => {
+    const mockBatch = [[0.1, 0.2], [0.3, 0.4]];
+    mockCreate.mockResolvedValueOnce({
+      data: [
+        { embedding: mockBatch[0] },
+        { embedding: mockBatch[1] },
+      ],
+    });
+
+    const embedder = new LMStudioEmbedder({
+      model: "test-model",
+      baseURL: "http://localhost:1234/v1",
+    });
+
+    const result = await embedder.embedBatch(["text1", "text2"]);
+
+    expect(mockCreate).toHaveBeenCalledTimes(1);
+    expect(mockCreate.mock.calls[0][0].input).toEqual(["text1", "text2"]);
+    expect(result).toEqual(mockBatch);
+  });
+});