Telemetry stream: GET /api/telemetry + MCP get_telemetry (#16)

src/mesh/mcp.controller.spec.ts

@@ -8,6 +8,7 @@ import {
   kamilNodeInfo,
   nodeInfoFrame,
   startBridge,
+  telemetryPacketFrame,
   waitFor,
 } from './fake-bridge.js';
 import { createMeshMcpServer } from './mcp.controller.js';
@@ -64,7 +65,7 @@ async function connectMcp(svc: MeshService): Promise<{
 }
 
 describe('MCP server tools', () => {
-  it('lists all seven tools with descriptions and input schemas', async () => {
+  it('lists all eight tools with descriptions and input schemas', async () => {
     const env = await connectedService();
     try {
       const mcp = await connectMcp(env.svc);
@@ -74,6 +75,7 @@ describe('MCP server tools', () => {
           'device_info',
           'get_messages',
           'get_node',
+          'get_telemetry',
           'list_channels',
           'list_nodes',
           'mesh_status',
@@ -263,6 +265,25 @@ describe('MCP server tools', () => {
           ),
         ) as { dir: string; to?: number }[];
         expect(msgs[0]).toMatchObject({ dir: 'tx', to: BROADCAST_ADDR }); // newest first
+
+        env.sockets[0].write(
+          telemetryPacketFrame(KAMIL_NUM, {
+            case: 'deviceMetrics',
+            value: { batteryLevel: 87 },
+          }),
+        );
+        await waitFor(() => env.svc.telemetry().length === 1);
+        const tel = JSON.parse(
+          toolText(
+            await mcp.client.callTool({ name: 'get_telemetry', arguments: {} }),
+          ),
+        ) as { from: number; kind: string; data: object }[];
+        expect(tel).toHaveLength(1);
+        expect(tel[0]).toMatchObject({
+          from: KAMIL_NUM,
+          kind: 'deviceMetrics',
+        });
+        expect(tel[0].data).toEqual({ batteryLevel: 87 });
       } finally {
         await mcp.close();
       }