Updates

daemon/dbus-service.js

@@ -0,0 +1,54 @@
+const IFACE = 'io.qvac.Jarvis.Session';
+const OBJECT = '/io/qvac/Jarvis';
+const BUS_NAME = 'io.qvac.Jarvis';
+
+export async function serveOnSessionBus(daemon) {
+  const dbus = await import('dbus-next');
+  const { Interface } = dbus.interface;
+  class Session extends Interface {
+    constructor() { super(IFACE); }
+    Arm() { daemon.arm(); }
+    Sleep() { daemon.sleep(); }
+    Shutdown() { daemon.close(); }
+    Say(text) { return daemon.say?.(text); }
+    Ask(text) { return daemon.ask(text); }
+    Cancel() { daemon.cancel(); }
+    SetMode(mode) { daemon.mode = mode; daemon.emit('ModeChanged', mode); }
+    GetState() { return daemon.state; }
+    ComputerGrant(persist) { daemon.computerGrant(persist); }
+    ComputerRevoke() { daemon.computerRevoke(); }
+    ComputerStatus() { return JSON.stringify(daemon.computer.status()); }
+    StateChanged(state) { this.emit('StateChanged', state); }
+    Reply(text) { this.emit('Reply', String(text)); }
+    Token(text) { this.emit('Token', String(text)); }
+    Error(code, message) { this.emit('Error', String(code), String(message)); }
+  }
+  Interface.configureMembers(Session, {
+    Arm: { inSignature: '', outSignature: '', method: 'Arm' },
+    Sleep: { inSignature: '', outSignature: '', method: 'Sleep' },
+    Shutdown: { inSignature: '', outSignature: '', method: 'Shutdown' },
+    Say: { inSignature: 's', outSignature: '', method: 'Say' },
+    Ask: { inSignature: 's', outSignature: '', method: 'Ask' },
+    Cancel: { inSignature: '', outSignature: '', method: 'Cancel' },
+    SetMode: { inSignature: 's', outSignature: '', method: 'SetMode' },
+    GetState: { inSignature: '', outSignature: 's', method: 'GetState' },
+    ComputerGrant: { inSignature: 'b', outSignature: '', method: 'ComputerGrant' },
+    ComputerRevoke: { inSignature: '', outSignature: '', method: 'ComputerRevoke' },
+    ComputerStatus: { inSignature: '', outSignature: 's', method: 'ComputerStatus' },
+    StateChanged: { signature: 's', signal: true },
+    Reply: { signature: 's', signal: true },
+    Token: { signature: 's', signal: true },
+    Error: { signature: 'ss', signal: true },
+  });
+  const bus = dbus.sessionBus();
+  await bus.requestName(BUS_NAME);
+  const iface = new Session();
+  bus.export(OBJECT, iface);
+  daemon.on('StateChanged', (state) => iface.StateChanged(state));
+  daemon.on('Reply', (reply) => iface.Reply(reply));
+  daemon.on('Token', (token) => iface.Token(token));
+  daemon.on('Error', (code, message) => iface.Error(code, message));
+  return bus;
+}
+
+export { BUS_NAME, OBJECT, IFACE };

daemon/index.js

@@ -1,11 +1,15 @@
 import { EventEmitter } from 'node:events';
 import { HarnessBridge } from './harness-bridge.js';
 import { ComputerUseSession } from '../computer-use/session.js';
+import { VoiceStateMachine } from './voice-state.js';
+import { QvacScheduler } from './qvac-scheduler.js';
 
 export class JarvisDaemon extends EventEmitter {
   constructor() {
     super();
     this.state = 'ARMED';
+    this.voice = new VoiceStateMachine();
+    this.scheduler = new QvacScheduler({ concurrency: 1 });
     this.computer = new ComputerUseSession();
     this.harness = new HarnessBridge({ cwd: process.cwd() });
     this.harness.on('agent_message_chunk', (ev) => this.emit('Token', ev?.text || ev?.delta || ''));
@@ -13,8 +17,19 @@ export class JarvisDaemon extends EventEmitter {
   }
 
   setState(state) { this.state = state; this.emit('StateChanged', state); }
-  async ask(text) { this.setState('THINKING'); try { const reply = await this.harness.ask(text); this.emit('Reply', reply); return reply; } finally { this.setState('LISTENING'); } }
-  cancel() { this.harness.cancel(); this.computer.revoke(); this.setState('ARMED'); }
+  arm() { this.voice.wake(); this.setState('LISTENING'); }
+  sleep() { this.voice.sleep(); this.setState('SLEEPING'); }
+  say(text) { this.emit('Reply', String(text)); }
+  async ask(text) {
+    this.voice.utterance(); this.setState('THINKING');
+    try {
+      const reply = await this.scheduler.run(() => this.harness.ask(text), { lane: 'voice' });
+      this.voice.speak(); this.setState('SPEAKING'); this.emit('Reply', reply); return reply;
+    } catch (error) {
+      this.emit('Error', 'QVAC', error.message); this.voice.cancel(); this.setState('ARMED'); throw error;
+    }
+  }
+  cancel() { this.harness.cancel(); this.scheduler.cancelQueued((job) => job.lane === 'voice'); this.computer.revoke(); this.voice.cancel(); this.setState('ARMED'); }
   computerGrant(persist = false) { const result = this.computer.grant({ persist }); this.emit('ComputerStep', JSON.stringify({ action: 'grant', ...result })); return result; }
   computerRevoke() { this.computer.revoke(); this.emit('ComputerStep', JSON.stringify({ action: 'revoke' })); }
   async close() { this.computerRevoke(); await this.harness.close(); }
@@ -22,6 +37,10 @@ export class JarvisDaemon extends EventEmitter {
 
 if (import.meta.url === `file://${process.argv[1]}`) {
   const daemon = new JarvisDaemon();
+  import('./dbus-service.js').then(({ serveOnSessionBus }) => serveOnSessionBus(daemon)).catch((error) => {
+    daemon.emit('Error', 'DBUS_UNAVAILABLE', error.message);
+    console.error(`jarvisd: D-Bus unavailable: ${error.message}`);
+  });
   process.on('SIGINT', () => daemon.close().finally(() => process.exit(0)));
   console.log('jarvisd scaffold ready; use the D-Bus adapter when installed');
 }

daemon/qvac-master.js

@@ -19,6 +19,13 @@ export const QVAC_MASTER = Object.freeze({
 export async function acquireQvac() {
   ownerCount += 1;
   if (!loadPromise) {
+    const resources = await Agent.engine.resources();
+    const gpuVisible = (resources.gpus?.length || 0) > 0 ||
+      Boolean(resources.drivers?.vulkan || resources.drivers?.cuda || resources.drivers?.opencl || resources.gpu);
+    if (!gpuVisible) {
+      ownerCount = Math.max(0, ownerCount - 1);
+      throw new Error('Jarvis requires a QVAC-visible GPU backend; run npm run gpu-doctor');
+    }
     loadPromise = Agent.engine.load({
       model: QVAC_MASTER.model,
       tools: true,

daemon/qvac-scheduler.js

@@ -0,0 +1,40 @@
+export class QvacScheduler {
+  constructor({ concurrency = 1 } = {}) {
+    this.concurrency = Math.max(1, concurrency);
+    this.running = 0;
+    this.queue = [];
+  }
+
+  run(task, { lane = 'background', signal } = {}) {
+    return new Promise((resolve, reject) => {
+      this.queue.push({ task, lane, signal, resolve, reject, enqueuedAt: Date.now() });
+      this.queue.sort((a, b) => this.priority(b.lane) - this.priority(a.lane) || a.enqueuedAt - b.enqueuedAt);
+      this.pump();
+    });
+  }
+
+  priority(lane) { return { voice: 3, 'computer-use': 2, background: 1, maintenance: 0 }[lane] ?? 0; }
+
+  pump() {
+    while (this.running < this.concurrency && this.queue.length) {
+      const job = this.queue.shift();
+      if (job.signal?.aborted) { job.reject(new Error('QVAC job cancelled before start')); continue; }
+      this.running += 1;
+      Promise.resolve().then(() => job.task(job.signal)).then(job.resolve, job.reject).finally(() => {
+        this.running -= 1;
+        this.pump();
+      });
+    }
+  }
+
+  cancelQueued(predicate = () => true) {
+    const kept = [];
+    for (const job of this.queue) {
+      if (predicate(job)) job.reject(new Error('QVAC job cancelled'));
+      else kept.push(job);
+    }
+    this.queue = kept;
+  }
+
+  status() { return { running: this.running, queued: this.queue.map((j) => j.lane) }; }
+}

daemon/voice-state.js

@@ -0,0 +1,52 @@
+const STATES = ['ARMED', 'LISTENING', 'THINKING', 'SPEAKING', 'SLEEPING'];
+const COMMANDS = new Map([
+  ['cancel', 'cancel'], ['stop', 'cancel'], ['never mind', 'cancel'],
+  ['hands off', 'cancel'], ['stop clicking', 'cancel'], ["that's enough", 'cancel'],
+  ['go to sleep', 'sleep'], ['privacy mode', 'sleep'],
+]);
+
+export class VoiceStateMachine {
+  constructor({ now = () => Date.now(), idleMs = 30 * 60 * 1000 } = {}) {
+    this.now = now;
+    this.idleMs = idleMs;
+    this.state = 'ARMED';
+    this.lastActivity = now();
+  }
+
+  transition(next, reason = 'unspecified') {
+    if (!STATES.includes(next)) throw new Error(`unknown Jarvis state: ${next}`);
+    const allowed = {
+      ARMED: ['LISTENING', 'SLEEPING'], LISTENING: ['THINKING', 'ARMED', 'SLEEPING'],
+      THINKING: ['SPEAKING', 'ARMED', 'LISTENING'], SPEAKING: ['LISTENING', 'ARMED'],
+      SLEEPING: ['LISTENING', 'ARMED'],
+    };
+    if (next !== this.state && !allowed[this.state].includes(next)) {
+      throw new Error(`invalid state transition ${this.state} -> ${next}`);
+    }
+    const previous = this.state;
+    this.state = next;
+    this.lastActivity = this.now();
+    return { previous, state: next, reason };
+  }
+
+  wake() { return this.transition('LISTENING', 'wake'); }
+  utterance() { return this.transition('THINKING', 'utterance'); }
+  speak() { return this.transition('SPEAKING', 'reply'); }
+  finishSpeaking() { return this.transition('LISTENING', 'playback-finished'); }
+  cancel() { return this.transition('ARMED', 'cancel'); }
+  sleep() { return this.transition('SLEEPING', 'idle-or-privacy'); }
+
+  command(text) {
+    const command = COMMANDS.get(String(text || '').trim().toLowerCase());
+    if (command === 'cancel') this.cancel();
+    if (command === 'sleep') this.sleep();
+    return command || null;
+  }
+
+  expireIdle() {
+    if (this.state !== 'SLEEPING' && this.now() - this.lastActivity >= this.idleMs) this.sleep();
+    return this.state;
+  }
+}
+
+export { STATES };

docs/ROADMAP.md

@@ -61,12 +61,13 @@ and run tests without importing dlinux.
 - [x] Serialize model loading and share the resulting harness engine.
 - [x] Request `device: "gpu"`, `gpu_layers: 99`, and GPU multimodal projection.
 - [x] Reject a CPU result instead of accepting QVAC's internal fallback.
+- [x] Preflight QVAC GPU visibility before downloading or loading a model.
 - [x] Add owner counting and a single close path.
 - [x] Set `QVAC_CONFIG_PATH`, `JARVIS_QVAC_MODEL`, and GPU policy in the user
   service.
 - [~] Add `gpu-doctor`; extend it to report QVAC resource capabilities, backend,
   driver, device name, VRAM, model fit, and the exact reason for failure.
-- [ ] Add master scheduler lanes: interactive voice, computer-use vision,
+- [x] Add master scheduler lanes: interactive voice, computer-use vision,
   background media, and maintenance.
 - [ ] Add VRAM admission control and queue media jobs instead of OOMing the
   voice lane.
@@ -101,9 +102,9 @@ GPU-owned worker.
 ## Phase 3 — daemon lifecycle and D-Bus
 
 - [~] Define `io.qvac.Jarvis.Session` XML.
-- [ ] Implement `Arm`, `Sleep`, `Shutdown`, `Say`, `Ask`, `Cancel`, `SetMode`,
+- [~] Implement `Arm`, `Sleep`, `Shutdown`, `Say`, `Ask`, `Cancel`, `SetMode`,
   and state queries.
-- [ ] Implement token, transcript, reply, audio-level, chip, job, computer
+- [~] Implement token, transcript, reply, audio-level, chip, job, computer
   step, and error signals.
 - [ ] Keep payloads small; stream PCM and screenshots through a Unix socket or
   tmpfs paths.

test/daemon.test.js

@@ -0,0 +1,26 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { VoiceStateMachine } from '../daemon/voice-state.js';
+import { QvacScheduler } from '../daemon/qvac-scheduler.js';
+
+test('voice state machine handles wake, reply, cancel, and idle sleep', () => {
+  let now = 0;
+  const voice = new VoiceStateMachine({ now: () => now, idleMs: 100 });
+  voice.wake(); voice.utterance(); voice.speak(); voice.finishSpeaking();
+  assert.equal(voice.state, 'LISTENING');
+  assert.equal(voice.command('hands off'), 'cancel');
+  assert.equal(voice.state, 'ARMED');
+  voice.wake(); now = 101; voice.expireIdle();
+  assert.equal(voice.state, 'SLEEPING');
+});
+
+test('QVAC scheduler prioritizes voice and keeps one active job', async () => {
+  const scheduler = new QvacScheduler();
+  const order = [];
+  const first = scheduler.run(async () => { order.push('first'); await new Promise((r) => setTimeout(r, 5)); }, { lane: 'background' });
+  const media = scheduler.run(async () => order.push('media'), { lane: 'background' });
+  const voice = scheduler.run(async () => order.push('voice'), { lane: 'voice' });
+  await Promise.all([first, media, voice]);
+  assert.deepEqual(order, ['first', 'voice', 'media']);
+  assert.deepEqual(scheduler.status(), { running: 0, queued: [] });
+});