feat: make each plugin an npm workspace built by a termix-plugin CLI

plugins/network-topology/tests/backend/repositories/network-topology-repository.test.ts

@@ -0,0 +1,73 @@
+import { afterEach, describe, expect, it } from "vitest";
+import { TestSqliteDatabase } from "../../../../../src/backend/tests/database/repositories/test-support.js";
+import { NetworkTopologyRepository } from "../../../../../src/backend/database/repositories/network-topology-repository.js";
+
+describe("NetworkTopologyRepository", () => {
+  let adapter: TestSqliteDatabase | null = null;
+
+  afterEach(async () => {
+    if (adapter) {
+      await adapter.close();
+      adapter = null;
+    }
+  });
+
+  async function createRepository(
+    onWrite?: () => void | Promise<void>,
+  ): Promise<NetworkTopologyRepository> {
+    adapter = new TestSqliteDatabase();
+    const context = await adapter.connect();
+    await adapter.exec(`
+      INSERT INTO users (id, username, password_hash)
+      VALUES ('user-1', 'alice', 'hash'), ('user-2', 'bob', 'hash');
+    `);
+
+    return new NetworkTopologyRepository(context, onWrite);
+  }
+
+  it("finds, creates, and updates topology by user id", async () => {
+    const repo = await createRepository();
+
+    expect(await repo.findByUserId("user-1")).toBeNull();
+
+    await repo.upsertForUser(
+      "user-1",
+      JSON.stringify({ nodes: [{ id: "host-1" }], edges: [] }),
+      "2026-06-27T00:00:00.000Z",
+    );
+    expect(await repo.findByUserId("user-1")).toMatchObject({
+      userId: "user-1",
+      topology: '{"nodes":[{"id":"host-1"}],"edges":[]}',
+      updatedAt: "2026-06-27T00:00:00.000Z",
+    });
+
+    await repo.upsertForUser(
+      "user-1",
+      JSON.stringify({ nodes: [], edges: [{ id: "edge-1" }] }),
+      "2026-06-27T01:00:00.000Z",
+    );
+    expect(await repo.findByUserId("user-1")).toMatchObject({
+      userId: "user-1",
+      topology: '{"nodes":[],"edges":[{"id":"edge-1"}]}',
+      updatedAt: "2026-06-27T01:00:00.000Z",
+    });
+  });
+
+  it("deletes topology and only triggers writes for changed rows", async () => {
+    let writeCount = 0;
+    const repo = await createRepository(() => {
+      writeCount += 1;
+    });
+
+    await repo.upsertForUser("user-1", "{}");
+    await repo.upsertForUser("user-1", '{"nodes":[]}');
+    expect(writeCount).toBe(2);
+
+    expect(await repo.deleteByUserId("missing")).toBe(0);
+    expect(writeCount).toBe(2);
+
+    expect(await repo.deleteByUserId("user-1")).toBe(1);
+    expect(writeCount).toBe(3);
+    expect(await repo.findByUserId("user-1")).toBeNull();
+  });
+});