diff --git a/README.md b/README.md
index d67c7ea..d70a356 100644
--- a/README.md
+++ b/README.md
@@ -867,7 +867,9 @@ Methods:
 - `node.capabilities.get` returns negotiated protocol version and enabled capabilities.
 - `node.location.set` updates the node's last-known location (when `server.nodes.location.enabled` is true).
 - `node.location.get` returns the node's stored location payload.
+- `node.status.set` publishes companion status/heartbeat fields (`platform`, `appVersion`, `batteryPct`, etc.).
 - `system.location` provides an operator view of registered node locations.
+- `system.nodes` returns registered node snapshots (role, capabilities, identity, location/status).
 - `system.capabilities` returns gateway protocol and node policy snapshot.
 
 ## Canvas / A2UI Foundation
diff --git a/docs/api/PROTOCOL.md b/docs/api/PROTOCOL.md
index 9c8db12..460ad03 100644
--- a/docs/api/PROTOCOL.md
+++ b/docs/api/PROTOCOL.md
@@ -647,6 +647,26 @@ Requires `server.nodes.enabled: true` and `server.nodes.location.enabled: true`.
 
 Return the stored last-known location for the currently registered node connection.
 
+#### `node.status.set`
+
+Publish companion/node runtime status metadata (for example macOS menu-bar heartbeat state).
+
+**Request:**
+```json
+{
+  "id": 12,
+  "method": "node.status.set",
+  "params": {
+    "platform": "macos",
+    "appVersion": "0.3.1",
+    "deviceName": "MacBook Pro",
+    "statusText": "Idle",
+    "batteryPct": 64,
+    "powerSource": "battery"
+  }
+}
+```
+
 #### `system.capabilities`
 
 Return gateway protocol version, node policy status, and feature-gate snapshot.
@@ -684,6 +704,10 @@ Return gateway protocol version, node policy status, and feature-gate snapshot.
 
 Return the operator-facing snapshot of registered node locations.
 
+#### `system.nodes`
+
+Return the operator-facing snapshot of registered node connections (identity, role, capabilities, location/status).
+
 ### Canvas Methods
 
 #### `canvas.put`
diff --git a/docs/plans/2026-02-16-macos-menu-bar-companion-foundation-checklist.md b/docs/plans/2026-02-16-macos-menu-bar-companion-foundation-checklist.md
new file mode 100644
index 0000000..010eed7
--- /dev/null
+++ b/docs/plans/2026-02-16-macos-menu-bar-companion-foundation-checklist.md
@@ -0,0 +1,49 @@
+# macOS Menu Bar Companion Foundation Checklist
+
+**Date:** 2026-02-16  
+**Scope:** Close the OpenClaw "macOS menu bar app" gap with a gateway-side companion status foundation.
+
+## Goal
+
+Add a practical companion-node status surface so a macOS menu bar app can report heartbeat/platform metadata and operators can inspect active companion state.
+
+## Implemented
+
+- Added node status protocol parser:
+  - `parseNodeStatusSetParams()`
+- Added node status RPC:
+  - `node.status.set`
+- Extended node connection state:
+  - `status` payload (`platform`, `appVersion`, `deviceName`, `statusText`, `batteryPct`, `powerSource`, `reportedAt`)
+- Added operator node snapshot endpoint:
+  - `system.nodes`
+- Wired gateway runtime callbacks for node snapshot listing and status persistence.
+- Updated node method authorization scopes:
+  - `companion` role can call `node.status.set`
+  - observer/automation remain read-only for node scoped methods.
+
+## Docs Updated
+
+- `README.md` — node method list now includes `node.status.set` and `system.nodes`.
+- `docs/api/PROTOCOL.md` — added request docs for `node.status.set` and `system.nodes`.
+
+## Tests
+
+- `src/gateway/protocol.test.ts`
+  - status parser valid/invalid coverage.
+- `src/gateway/handlers/node.test.ts`
+  - status update persistence behavior.
+- `src/gateway/handlers/handlers.test.ts`
+  - `system.nodes` empty + filtered responses.
+- `src/gateway/server.test.ts`
+  - end-to-end `node.status.set` + `system.nodes` flow.
+- `src/gateway/auth.test.ts`
+  - role-scope denial for `node.status.set` where not permitted.
+
+## Validation Run
+
+```bash
+pnpm test:run src/gateway/protocol.test.ts src/gateway/auth.test.ts src/gateway/handlers/node.test.ts src/gateway/handlers/handlers.test.ts src/gateway/server.test.ts
+pnpm typecheck
+pnpm build
+```
diff --git a/docs/plans/state.json b/docs/plans/state.json
index ab66499..2660bad 100644
--- a/docs/plans/state.json
+++ b/docs/plans/state.json
@@ -517,6 +517,31 @@
       ],
       "test_status": "pnpm test:run src/gateway/canvas-store.test.ts src/gateway/handlers/handlers.test.ts src/gateway/server.test.ts + pnpm typecheck + pnpm build passing"
     },
+    "macos-menu-bar-companion-foundation": {
+      "file": "2026-02-16-macos-menu-bar-companion-foundation-checklist.md",
+      "status": "completed",
+      "date": "2026-02-16",
+      "updated": "2026-02-16",
+      "summary": "Implemented macOS companion foundation on gateway node RPC: added `node.status.set` for companion heartbeat/status metadata and `system.nodes` for operator visibility of registered node snapshots (role/capabilities/identity/location/status), with role-scope auth enforcement and tests/docs.",
+      "files_created": [
+        "docs/plans/2026-02-16-macos-menu-bar-companion-foundation-checklist.md"
+      ],
+      "files_modified": [
+        "src/gateway/protocol.ts",
+        "src/gateway/protocol.test.ts",
+        "src/gateway/handlers/node.ts",
+        "src/gateway/handlers/node.test.ts",
+        "src/gateway/handlers/system.ts",
+        "src/gateway/handlers/handlers.test.ts",
+        "src/gateway/handlers/index.ts",
+        "src/gateway/server.ts",
+        "src/gateway/server.test.ts",
+        "src/gateway/auth.test.ts",
+        "README.md",
+        "docs/api/PROTOCOL.md"
+      ],
+      "test_status": "pnpm test:run src/gateway/protocol.test.ts src/gateway/auth.test.ts src/gateway/handlers/node.test.ts src/gateway/handlers/handlers.test.ts src/gateway/server.test.ts + pnpm typecheck + pnpm build passing"
+    },
     "qmd-backend": {
       "file": "2026-02-16-qmd-backend-checklist.md",
       "status": "completed",
@@ -3078,7 +3103,7 @@
     }
   },
   "overall_progress": {
-    "total_test_count": 1780,
+    "total_test_count": 1786,
     "all_tests_passing": true,
     "p0_completion": "3/3 (100%)",
     "p1_completion": "4/4 (100%)",
@@ -3093,12 +3118,12 @@
     "tier2_completion": "4/4 (100%) — inbound webhooks, vector memory search, Dockerfile, heartbeat monitor",
     "tier3_completion": "5/5 (100%) — lane queue, credential redaction, web UI token dashboard, xAI (Grok) provider, Voyage AI embeddings",
     "tier4_completion": "4/4 (100%) — gateway lock, shell completion, Tailscale Serve/Funnel, DM pairing codes",
-    "feature_gap_scorecard": "120/128 match (94%), 0 partial (0%), 8 missing (6%)",
+    "feature_gap_scorecard": "121/128 match (95%), 0 partial (0%), 7 missing (5%)",
     "operator_dx_milestone": "Phase 3 (Live Ops Dashboard): 2/2 plans complete — milestone done",
     "gmail_auth_cli": "flynn gmail-auth command implemented with OAuth2 flow, doctor check, config routed to Telegram",
     "native_audio_support": "completed — smart routing for native audio (Gemini/OpenAI/GitHub) vs Whisper transcription fallback",
     "remaining_phases_completion": "Phase 1: 3/3 (100%) — context levels, command registry, memory structure. Phase 2: 3/3 (100%) — component registry, confidence routing, history index. Phase 3: 2/2 (100%) — adaptive memory/compaction, truthfulness/autonomy hardening",
-    "next_up": "OpenClaw gap: macOS menu bar companion app (open next scoped implementation checklist)"
+    "next_up": "OpenClaw gap: iOS node (open next scoped implementation checklist)"
   },
   "soul_md_and_cron_create": {
     "date": "2026-02-11",
diff --git a/src/gateway/auth.test.ts b/src/gateway/auth.test.ts
index 20d6a72..697f429 100644
--- a/src/gateway/auth.test.ts
+++ b/src/gateway/auth.test.ts
@@ -186,5 +186,17 @@ describe('authorizeNodeMethod', () => {
       roleScopes: { companion: ['node.capabilities.get', 'node.location.set'] },
     });
     expect(allowedLocation.authenticated).toBe(true);
+
+    const deniedStatus = authorizeNodeMethod({
+      enabled: true,
+      method: 'node.status.set',
+      nodeRole: 'observer',
+      allowedRoles: ['companion', 'observer'],
+      roleScopes: {
+        companion: ['node.capabilities.get', 'node.status.set'],
+        observer: ['node.capabilities.get'],
+      },
+    });
+    expect(deniedStatus.authenticated).toBe(false);
   });
 });
diff --git a/src/gateway/handlers/handlers.test.ts b/src/gateway/handlers/handlers.test.ts
index 6e49f80..d28ca2f 100644
--- a/src/gateway/handlers/handlers.test.ts
+++ b/src/gateway/handlers/handlers.test.ts
@@ -215,6 +215,58 @@ describe('system handlers', () => {
     expect(locations[0]?.nodeId).toBe('node-1');
     expect(getPath(result.result, 'summary')).toEqual({ total: 1 });
   });
+
+  it('system.nodes returns empty result when getNodes is not provided', async () => {
+    const req: GatewayRequest = { id: 8, method: 'system.nodes' };
+    const result = await handlers['system.nodes'](req) as GatewayResponse;
+    expect(result.id).toBe(8);
+    expect(getPath(result.result, 'nodes')).toEqual([]);
+    expect(getPath(result.result, 'summary')).toEqual({ total: 0 });
+  });
+
+  it('system.nodes returns filtered registered node snapshots', async () => {
+    const handlers = createSystemHandlers({
+      ...deps,
+      getNodes: ({ role, platform, limit } = {}) => {
+        const all = [
+          {
+            connectionId: 'c1',
+            nodeId: 'companion-mac',
+            role: 'companion',
+            identity: 'will@example.com',
+            protocolVersion: 1,
+            capabilities: ['ui.canvas'],
+            registeredAt: 100,
+            status: { platform: 'macos' as const, appVersion: '0.3.0', powerSource: 'ac' as const, reportedAt: 120 },
+          },
+          {
+            connectionId: 'c2',
+            nodeId: 'observer-linux',
+            role: 'observer',
+            protocolVersion: 1,
+            capabilities: [],
+            registeredAt: 90,
+            status: { platform: 'linux' as const, powerSource: 'unknown' as const, reportedAt: 95 },
+          },
+        ];
+        return all
+          .filter((entry) => !role || entry.role === role)
+          .filter((entry) => !platform || entry.status?.platform === platform)
+          .slice(0, limit ?? 100);
+      },
+    });
+
+    const req: GatewayRequest = {
+      id: 9,
+      method: 'system.nodes',
+      params: { role: 'companion', platform: 'macos', limit: 1 },
+    };
+    const result = await handlers['system.nodes'](req) as GatewayResponse;
+    const nodes = getPath(result.result, 'nodes') as Array<{ nodeId: string }>;
+    expect(nodes).toHaveLength(1);
+    expect(nodes[0]?.nodeId).toBe('companion-mac');
+    expect(getPath(result.result, 'summary')).toEqual({ total: 1 });
+  });
 });
 
 describe('system.tokenUsage handler', () => {
diff --git a/src/gateway/handlers/index.ts b/src/gateway/handlers/index.ts
index 7e5aaa1..4d50f53 100644
--- a/src/gateway/handlers/index.ts
+++ b/src/gateway/handlers/index.ts
@@ -20,4 +20,4 @@ export type { HistoryHandlerDeps } from './history.js';
 export { createCanvasHandlers } from './canvas.js';
 export type { CanvasHandlerDeps } from './canvas.js';
 export { createNodeHandlers } from './node.js';
-export type { NodeHandlerDeps, NodeRegistration, NodeConnectionState, NodeLocation } from './node.js';
+export type { NodeHandlerDeps, NodeRegistration, NodeConnectionState, NodeLocation, NodeStatus } from './node.js';
diff --git a/src/gateway/handlers/node.test.ts b/src/gateway/handlers/node.test.ts
index 0541f49..73af5f8 100644
--- a/src/gateway/handlers/node.test.ts
+++ b/src/gateway/handlers/node.test.ts
@@ -18,6 +18,10 @@ describe('node handlers', () => {
         const prior = states.get(connectionId) ?? {};
         states.set(connectionId, { ...prior, location });
       },
+      setNodeStatus: (connectionId, status) => {
+        const prior = states.get(connectionId) ?? {};
+        states.set(connectionId, { ...prior, status });
+      },
     });
 
     const result = await handlers['node.register']({
@@ -48,6 +52,7 @@ describe('node handlers', () => {
       getConnectionState: (connectionId) => states.get(connectionId),
       setNodeRegistration: () => {},
       setNodeLocation: () => {},
+      setNodeStatus: () => {},
     });
 
     const result = await handlers['node.register']({
@@ -83,6 +88,7 @@ describe('node handlers', () => {
       getConnectionState: (connectionId) => states.get(connectionId),
       setNodeRegistration: () => {},
       setNodeLocation: () => {},
+      setNodeStatus: () => {},
     });
 
     const result = await handlers['node.capabilities.get']({
@@ -116,6 +122,7 @@ describe('node handlers', () => {
         const prior = states.get(connectionId) ?? {};
         states.set(connectionId, { ...prior, location });
       },
+      setNodeStatus: () => {},
     });
 
     const setResult = await handlers['node.location.set']({
@@ -159,6 +166,7 @@ describe('node handlers', () => {
       getConnectionState: (connectionId) => states.get(connectionId),
       setNodeRegistration: () => {},
       setNodeLocation: () => {},
+      setNodeStatus: () => {},
     });
 
     const result = await handlers['node.location.set']({
@@ -168,4 +176,46 @@ describe('node handlers', () => {
     });
     expect((result as { error: { message: string } }).error.message).toContain('disabled');
   });
+
+  it('stores companion node status updates', async () => {
+    const states = new Map<string, NodeConnectionState>([['conn-1', {
+      node: {
+        nodeId: 'node-a',
+        role: 'companion',
+        protocolVersion: 1,
+        capabilities: ['status'],
+        registeredAt: Date.now(),
+      },
+    }]]);
+    const handlers = createNodeHandlers({
+      enabled: true,
+      locationEnabled: true,
+      allowedRoles: ['companion'],
+      featureGates: {},
+      getConnectionState: (connectionId) => states.get(connectionId),
+      setNodeRegistration: () => {},
+      setNodeLocation: () => {},
+      setNodeStatus: (connectionId, status) => {
+        const prior = states.get(connectionId) ?? {};
+        states.set(connectionId, { ...prior, status });
+      },
+    });
+
+    const result = await handlers['node.status.set']({
+      id: 7,
+      method: 'node.status.set',
+      params: {
+        connectionId: 'conn-1',
+        platform: 'macos',
+        appVersion: '0.2.0',
+        deviceName: 'Office Mac',
+        batteryPct: 81,
+        powerSource: 'ac',
+      },
+    });
+
+    expect((result as { result: { updated: boolean } }).result.updated).toBe(true);
+    expect(states.get('conn-1')?.status?.platform).toBe('macos');
+    expect(states.get('conn-1')?.status?.appVersion).toBe('0.2.0');
+  });
 });
diff --git a/src/gateway/handlers/node.ts b/src/gateway/handlers/node.ts
index e627107..c77049f 100644
--- a/src/gateway/handlers/node.ts
+++ b/src/gateway/handlers/node.ts
@@ -7,6 +7,7 @@ import {
   parseNodeRegisterParams,
   parseNodeLocationSetParams,
   parseNodeLocationGetParams,
+  parseNodeStatusSetParams,
 } from '../protocol.js';
 
 export interface NodeRegistration {
@@ -21,6 +22,7 @@ export interface NodeConnectionState {
   identity?: string;
   node?: NodeRegistration;
   location?: NodeLocation;
+  status?: NodeStatus;
 }
 
 export interface NodeLocation {
@@ -35,6 +37,16 @@ export interface NodeLocation {
   receivedAt: number;
 }
 
+export interface NodeStatus {
+  platform: 'macos' | 'ios' | 'android' | 'linux' | 'windows' | 'unknown';
+  appVersion?: string;
+  deviceName?: string;
+  statusText?: string;
+  batteryPct?: number;
+  powerSource: 'ac' | 'battery' | 'unknown';
+  reportedAt: number;
+}
+
 export interface NodeHandlerDeps {
   enabled: boolean;
   locationEnabled: boolean;
@@ -43,6 +55,7 @@ export interface NodeHandlerDeps {
   getConnectionState: (connectionId: string) => NodeConnectionState | undefined;
   setNodeRegistration: (connectionId: string, registration: NodeRegistration) => void;
   setNodeLocation: (connectionId: string, location: NodeLocation) => void;
+  setNodeStatus: (connectionId: string, status: NodeStatus) => void;
 }
 
 export function createNodeHandlers(deps: NodeHandlerDeps) {
@@ -198,6 +211,43 @@ export function createNodeHandlers(deps: NodeHandlerDeps) {
       });
     },
 
+    'node.status.set': async (request: GatewayRequest): Promise<OutboundMessage> => {
+      if (!deps.enabled) {
+        return makeError(request.id, ErrorCode.AuthFailed, 'Node RPC is disabled');
+      }
+
+      const parsed = parseNodeStatusSetParams(request.params);
+      if (!parsed) {
+        return makeError(request.id, ErrorCode.InvalidRequest, 'Invalid node.status.set params');
+      }
+
+      const state = deps.getConnectionState(parsed.connectionId);
+      if (!state?.node) {
+        return makeError(request.id, ErrorCode.AuthFailed, 'Node is not registered for this connection');
+      }
+
+      const status: NodeStatus = {
+        platform: parsed.platform,
+        appVersion: parsed.appVersion?.trim() || undefined,
+        deviceName: parsed.deviceName?.trim() || undefined,
+        statusText: parsed.statusText?.trim() || undefined,
+        batteryPct: parsed.batteryPct,
+        powerSource: parsed.powerSource ?? 'unknown',
+        reportedAt: Date.now(),
+      };
+
+      deps.setNodeStatus(parsed.connectionId, status);
+
+      return makeResponse(request.id, {
+        updated: true,
+        node: {
+          id: state.node.nodeId,
+          role: state.node.role,
+        },
+        status,
+      });
+    },
+
     'system.capabilities': async (request: GatewayRequest): Promise<OutboundMessage> => {
       const params = request.params as { connectionId?: string } | undefined;
       const connectionId = params?.connectionId;
diff --git a/src/gateway/handlers/system.ts b/src/gateway/handlers/system.ts
index 49429f0..76139f5 100644
--- a/src/gateway/handlers/system.ts
+++ b/src/gateway/handlers/system.ts
@@ -2,7 +2,7 @@ import type { GatewayRequest, OutboundMessage } from '../protocol.js';
 import { makeResponse, makeError, ErrorCode } from '../protocol.js';
 import type { MetricsSnapshot, EventEntry, ActiveRequestInfo } from '../metrics.js';
 import type { ServiceInfo } from './services.js';
-import type { NodeLocation } from './node.js';
+import type { NodeLocation, NodeStatus } from './node.js';
 
 /** Per-session token usage report returned by system.tokenUsage. */
 export interface TokenUsageEntry {
@@ -29,6 +29,18 @@ export interface NodeLocationEntry {
   location: NodeLocation;
 }
 
+export interface NodeEntry {
+  connectionId: string;
+  nodeId: string;
+  role: string;
+  identity?: string;
+  protocolVersion: number;
+  capabilities: string[];
+  registeredAt: number;
+  location?: NodeLocation;
+  status?: NodeStatus;
+}
+
 export interface SystemHandlerDeps {
   startTime: number;
   version: string;
@@ -53,6 +65,8 @@ export interface SystemHandlerDeps {
   getPresence?: (opts?: { channel?: string; status?: 'online' | 'offline'; limit?: number }) => PresenceEntry[];
   /** Optional callback to retrieve latest node location data. */
   getNodeLocations?: (opts?: { role?: string; nodeId?: string; limit?: number }) => NodeLocationEntry[];
+  /** Optional callback to retrieve registered node connection snapshots. */
+  getNodes?: (opts?: { role?: string; platform?: string; limit?: number }) => NodeEntry[];
 }
 
 export function createSystemHandlers(deps: SystemHandlerDeps) {
@@ -142,6 +156,25 @@ export function createSystemHandlers(deps: SystemHandlerDeps) {
       });
     },
 
+    'system.nodes': async (request: GatewayRequest): Promise<OutboundMessage> => {
+      if (!deps.getNodes) {
+        return makeResponse(request.id, { nodes: [], summary: { total: 0 } });
+      }
+
+      const params = request.params as { role?: string; platform?: string; limit?: number } | undefined;
+      const nodes = deps.getNodes({
+        role: params?.role,
+        platform: params?.platform,
+        limit: params?.limit,
+      });
+      return makeResponse(request.id, {
+        nodes,
+        summary: {
+          total: nodes.length,
+        },
+      });
+    },
+
     'system.usage': async (request: GatewayRequest): Promise<OutboundMessage> => {
       const uptime = Math.floor((Date.now() - deps.startTime) / 1000);
       const usage = deps.getUsage?.() ?? { totalSessions: 0, activeConnections: 0 };
diff --git a/src/gateway/protocol.test.ts b/src/gateway/protocol.test.ts
index a2eb55c..83f54f7 100644
--- a/src/gateway/protocol.test.ts
+++ b/src/gateway/protocol.test.ts
@@ -5,6 +5,7 @@ import {
   parseNodeRegisterParams,
   parseNodeLocationSetParams,
   parseNodeLocationGetParams,
+  parseNodeStatusSetParams,
   makeResponse,
   makeError,
   makeEvent,
@@ -171,6 +172,45 @@ describe('protocol', () => {
     });
   });
 
+  describe('parseNodeStatusSetParams', () => {
+    it('parses valid node status set params', () => {
+      const parsed = parseNodeStatusSetParams({
+        connectionId: 'conn-1',
+        platform: 'macos',
+        appVersion: '0.1.0',
+        deviceName: 'Willbook',
+        statusText: 'Idle',
+        batteryPct: 73,
+        powerSource: 'battery',
+      });
+      expect(parsed).toEqual({
+        connectionId: 'conn-1',
+        platform: 'macos',
+        appVersion: '0.1.0',
+        deviceName: 'Willbook',
+        statusText: 'Idle',
+        batteryPct: 73,
+        powerSource: 'battery',
+      });
+    });
+
+    it('rejects invalid node status set params', () => {
+      expect(parseNodeStatusSetParams({
+        connectionId: 'conn-1',
+        platform: 'beos',
+      })).toBeNull();
+      expect(parseNodeStatusSetParams({
+        connectionId: 'conn-1',
+        platform: 'macos',
+        batteryPct: 120,
+      })).toBeNull();
+      expect(parseNodeStatusSetParams({
+        connectionId: '',
+        platform: 'macos',
+      })).toBeNull();
+    });
+  });
+
   describe('makeResponse', () => {
     it('creates a response message', () => {
       expect(makeResponse(1, { status: 'ok' })).toEqual({
diff --git a/src/gateway/protocol.ts b/src/gateway/protocol.ts
index db97cce..92cb327 100644
--- a/src/gateway/protocol.ts
+++ b/src/gateway/protocol.ts
@@ -34,6 +34,16 @@ export interface NodeLocationGetParams {
   connectionId: string;
 }
 
+export interface NodeStatusSetParams {
+  connectionId: string;
+  platform: 'macos' | 'ios' | 'android' | 'linux' | 'windows' | 'unknown';
+  appVersion?: string;
+  deviceName?: string;
+  statusText?: string;
+  batteryPct?: number;
+  powerSource?: 'ac' | 'battery' | 'unknown';
+}
+
 // ── Server → Client ────────────────────────────────────────────
 
 export interface GatewayResponse {
@@ -245,6 +255,44 @@ export function parseNodeLocationGetParams(params: unknown): NodeLocationGetPara
   };
 }
 
+export function parseNodeStatusSetParams(params: unknown): NodeStatusSetParams | null {
+  if (!params || typeof params !== 'object') {
+    return null;
+  }
+  const p = params as Record<string, unknown>;
+  if (typeof p.connectionId !== 'string' || !p.connectionId.trim()) {
+    return null;
+  }
+  if (typeof p.platform !== 'string' || !['macos', 'ios', 'android', 'linux', 'windows', 'unknown'].includes(p.platform)) {
+    return null;
+  }
+  if (p.appVersion !== undefined && typeof p.appVersion !== 'string') {
+    return null;
+  }
+  if (p.deviceName !== undefined && typeof p.deviceName !== 'string') {
+    return null;
+  }
+  if (p.statusText !== undefined && typeof p.statusText !== 'string') {
+    return null;
+  }
+  if (p.batteryPct !== undefined && (typeof p.batteryPct !== 'number' || !Number.isFinite(p.batteryPct) || p.batteryPct < 0 || p.batteryPct > 100)) {
+    return null;
+  }
+  if (p.powerSource !== undefined && !['ac', 'battery', 'unknown'].includes(String(p.powerSource))) {
+    return null;
+  }
+
+  return {
+    connectionId: p.connectionId,
+    platform: p.platform as NodeStatusSetParams['platform'],
+    appVersion: typeof p.appVersion === 'string' ? p.appVersion : undefined,
+    deviceName: typeof p.deviceName === 'string' ? p.deviceName : undefined,
+    statusText: typeof p.statusText === 'string' ? p.statusText : undefined,
+    batteryPct: typeof p.batteryPct === 'number' ? p.batteryPct : undefined,
+    powerSource: p.powerSource as NodeStatusSetParams['powerSource'] | undefined,
+  };
+}
+
 export function makeResponse(id: number, result: unknown): GatewayResponse {
   return { id, result };
 }
diff --git a/src/gateway/server.test.ts b/src/gateway/server.test.ts
index 8e9877c..879d325 100644
--- a/src/gateway/server.test.ts
+++ b/src/gateway/server.test.ts
@@ -236,6 +236,8 @@ describe('GatewayServer integration', () => {
     expect(methods).toContain('tools.invoke');
     expect(methods).toContain('canvas.put');
     expect(methods).toContain('canvas.list');
+    expect(methods).toContain('system.nodes');
+    expect(methods).toContain('node.status.set');
   });
 
   it('supports canvas artifact lifecycle via gateway RPC', async () => {
@@ -752,4 +754,59 @@ describe('GatewayServer node registration and capability negotiation', () => {
       }
     }
   });
+
+  it('supports node.status.set and exposes registered nodes via system.nodes', async () => {
+    if (!LISTEN_ALLOWED) {
+      return;
+    }
+
+    const ws = await new Promise<WebSocket>((resolve, reject) => {
+      const c = new WebSocket(`ws://127.0.0.1:${NODE_PORT}`);
+      c.on('open', () => resolve(c));
+      c.on('error', reject);
+    });
+
+    try {
+      const registered = await sendAndReceive(ws, {
+        id: 20,
+        method: 'node.register',
+        params: {
+          nodeId: 'node-mac',
+          role: 'companion',
+          protocolVersion: 1,
+          capabilities: ['ui.canvas'],
+        },
+      });
+      expect(((registered as GatewayResponse).result as { registered: boolean }).registered).toBe(true);
+
+      const status = await sendAndReceive(ws, {
+        id: 21,
+        method: 'node.status.set',
+        params: {
+          platform: 'macos',
+          appVersion: '0.3.1',
+          deviceName: 'MacBook Pro',
+          batteryPct: 64,
+          powerSource: 'battery',
+        },
+      });
+      expect(((status as GatewayResponse).result as { updated: boolean }).updated).toBe(true);
+
+      const nodes = await sendAndReceive(ws, {
+        id: 22,
+        method: 'system.nodes',
+        params: { role: 'companion', platform: 'macos', limit: 10 },
+      });
+      const list = ((nodes as GatewayResponse).result as {
+        nodes: Array<{ nodeId: string; status?: { platform: string; appVersion?: string } }>;
+      }).nodes;
+      expect(list.length).toBeGreaterThanOrEqual(1);
+      expect(list.some((entry) => entry.nodeId === 'node-mac')).toBe(true);
+      expect(list.find((entry) => entry.nodeId === 'node-mac')?.status?.platform).toBe('macos');
+    } finally {
+      if (ws.readyState === WebSocket.OPEN) {
+        ws.close();
+      }
+    }
+  });
 });
diff --git a/src/gateway/server.ts b/src/gateway/server.ts
index e62a9bd..39d75cf 100644
--- a/src/gateway/server.ts
+++ b/src/gateway/server.ts
@@ -220,6 +220,48 @@ export class GatewayServer {
         }
         return sorted;
       },
+      getNodes: ({ role, platform, limit } = {}) => {
+        const entries: Array<{
+          connectionId: string;
+          nodeId: string;
+          role: string;
+          identity?: string;
+          protocolVersion: number;
+          capabilities: string[];
+          registeredAt: number;
+          location?: NodeConnectionState['location'];
+          status?: NodeConnectionState['status'];
+        }> = [];
+
+        for (const [connectionId, state] of this.connectionStateMap.entries()) {
+          if (!state.node) {
+            continue;
+          }
+          if (role && state.node.role !== role) {
+            continue;
+          }
+          if (platform && state.status?.platform !== platform) {
+            continue;
+          }
+          entries.push({
+            connectionId,
+            nodeId: state.node.nodeId,
+            role: state.node.role,
+            identity: state.identity,
+            protocolVersion: state.node.protocolVersion,
+            capabilities: state.node.capabilities,
+            registeredAt: state.node.registeredAt,
+            location: state.location,
+            status: state.status,
+          });
+        }
+
+        const sorted = entries.sort((a, b) => b.registeredAt - a.registeredAt);
+        if (typeof limit === 'number' && Number.isFinite(limit) && limit > 0) {
+          return sorted.slice(0, Math.floor(limit));
+        }
+        return sorted;
+      },
       getUsage: () => ({
         totalSessions: this.config.sessionManager.listSessions().length,
         activeConnections: this.sessionBridge.connectionCount,
@@ -342,6 +384,16 @@ export class GatewayServer {
           location,
         });
       },
+      setNodeStatus: (connectionId, status) => {
+        const existing = this.connectionStateMap.get(connectionId);
+        if (!existing) {
+          return;
+        }
+        this.connectionStateMap.set(connectionId, {
+          ...existing,
+          status,
+        });
+      },
     });
 
     // Config handlers (only if config object is provided)
@@ -688,7 +740,7 @@ export class GatewayServer {
       nodeRole: this.connectionStateMap.get(connectionId)?.node?.role,
       allowedRoles: this.config.nodes?.allowedRoles ?? [],
       roleScopes: {
-        companion: ['node.capabilities.get', 'node.location.set', 'node.location.get'],
+        companion: ['node.capabilities.get', 'node.location.set', 'node.location.get', 'node.status.set'],
         observer: ['node.capabilities.get', 'node.location.get'],
         automation: ['node.capabilities.get', 'node.location.get'],
       },