feat(integrations): add @mem0/eve memory provider

Give Eve agents a first-class Mem0 recall/capture provider so they can use Mem0 in the agent loop instead of MCP.

Co-authored-by: Cursor <cursoragent@cursor.com>

integrations/eve/tests/messages.test.ts

@@ -0,0 +1,86 @@
+import { describe, expect, it } from "vitest";
+import {
+  completedTurnMessages,
+  conversationMessages,
+  extractText,
+  lastUserText,
+} from "../src/messages.js";
+
+describe("extractText", () => {
+  it("reads a string", () => {
+    expect(extractText("  hello  ")).toBe("hello");
+  });
+
+  it("joins text parts", () => {
+    expect(
+      extractText([
+        { type: "text", text: "I like" },
+        { type: "text", text: "tea" },
+      ]),
+    ).toBe("I like\ntea");
+  });
+
+  it("ignores non-text parts", () => {
+    expect(extractText([{ type: "image", url: "x" }])).toBe("");
+  });
+});
+
+describe("lastUserText", () => {
+  it("returns the last user message", () => {
+    expect(
+      lastUserText([
+        { role: "user", content: "first" },
+        { role: "assistant", content: "ok" },
+        { role: "user", content: "second" },
+      ]),
+    ).toBe("second");
+  });
+
+  it("returns empty when there is no user text", () => {
+    expect(lastUserText([{ role: "assistant", content: "hi" }])).toBe("");
+  });
+});
+
+describe("conversationMessages", () => {
+  it("keeps user and assistant text only", () => {
+    expect(
+      conversationMessages([
+        { role: "system", content: "ignore" },
+        { role: "user", content: "hello" },
+        { role: "assistant", content: "hi" },
+        { role: "user", content: "" },
+      ]),
+    ).toEqual([
+      { role: "user", content: "hello" },
+      { role: "assistant", content: "hi" },
+    ]);
+  });
+});
+
+describe("completedTurnMessages", () => {
+  it("pairs the current user turn with the latest assistant reply", () => {
+    expect(
+      completedTurnMessages({
+        turnInput: [{ role: "user", content: "I like tea" }],
+        messages: [
+          { role: "user", content: "older" },
+          { role: "assistant", content: "older reply" },
+          { role: "user", content: "I like tea" },
+          { role: "assistant", content: "Noted." },
+        ],
+      }),
+    ).toEqual([
+      { role: "user", content: "I like tea" },
+      { role: "assistant", content: "Noted." },
+    ]);
+  });
+
+  it("skips capture when the turn has no user text", () => {
+    expect(
+      completedTurnMessages({
+        turnInput: [{ role: "assistant", content: "hello" }],
+        messages: [{ role: "assistant", content: "hello" }],
+      }),
+    ).toEqual([]);
+  });
+});