refactor: consolidate agent/editor plugins under integrations/ (#5491)

Co-authored-by: Claude <noreply@anthropic.com>

integrations/pi-agent-plugin/tests/formatting.test.ts

@@ -0,0 +1,47 @@
+import { describe, it, expect } from "vitest";
+import { formatAge, formatMemoryCompact, formatMemoryList } from "../src/memory/formatting.ts";
+
+describe("formatAge", () => {
+  it("formats minutes", () => {
+    expect(formatAge(new Date(Date.now() - 30 * 60_000))).toBe("30m ago");
+  });
+
+  it("formats hours", () => {
+    expect(formatAge(new Date(Date.now() - 3 * 3_600_000))).toBe("3h ago");
+  });
+
+  it("formats days", () => {
+    expect(formatAge(new Date(Date.now() - 5 * 86_400_000))).toBe("5d ago");
+  });
+});
+
+describe("formatMemoryCompact", () => {
+  it("formats a memory as a single line", () => {
+    const mem = {
+      id: "abc-123-def-456",
+      memory: "User prefers dark mode",
+      categories: ["preference"],
+      createdAt: new Date(),
+    };
+    const line = formatMemoryCompact(mem);
+    expect(line).toContain("[preference]");
+    expect(line).toContain("User prefers dark mode");
+    expect(line).toContain("[mem0:abc-123-def-456]");
+  });
+});
+
+describe("formatMemoryList", () => {
+  it("formats multiple memories with numbering", () => {
+    const memories = [
+      { id: "id-1", memory: "Fact one", categories: ["insight"], createdAt: new Date() },
+      { id: "id-2", memory: "Fact two", categories: ["convention"], createdAt: new Date() },
+    ];
+    const output = formatMemoryList(memories);
+    expect(output).toContain("1.");
+    expect(output).toContain("2.");
+  });
+
+  it("returns empty message for no memories", () => {
+    expect(formatMemoryList([])).toBe("No memories found.");
+  });
+});