---
phase: 39-voice-polish
plan: 02
type: execute
wave: 1
depends_on: []
files_modified:
  - server/src/services/hardware.ts
  - server/src/routes/hardware.ts
  - ui/src/components/onboarding/VoiceStep.tsx
  - ui/src/components/NexusOnboardingWizard.tsx
  - ui/src/hooks/useHardwareInfo.ts
  - server/src/__tests__/39-voice-hardware-probe.test.ts
autonomous: true
requirements: [ONBRD-01, ONBRD-02]

must_haves:
  truths:
    - "Onboarding hardware probe reports whether Whisper STT is runnable on detected hardware"
    - "Onboarding hardware probe reports whether Piper TTS is runnable on detected hardware"
    - "VoiceStep shows enable/skip when hardware is sufficient"
    - "VoiceStep shows capability note and auto-skips or shows skip-only when hardware is insufficient"
  artifacts:
    - path: "server/src/services/hardware.ts"
      provides: "voiceCapability probe in HardwareInfo"
      contains: "whisperAvailable"
    - path: "server/src/routes/hardware.ts"
      provides: "voice capability data in /system/providers response"
      contains: "voiceCapability"
    - path: "ui/src/components/onboarding/VoiceStep.tsx"
      provides: "Hardware-aware voice step with conditional enable/skip"
      contains: "whisperAvailable\\|piperAvailable\\|voiceCapability"
    - path: "server/src/__tests__/39-voice-hardware-probe.test.ts"
      provides: "Tests for voice capability detection"
      contains: "describe.*voice.*capability"
  key_links:
    - from: "ui/src/components/onboarding/VoiceStep.tsx"
      to: "ui/src/hooks/useHardwareInfo.ts"
      via: "voiceCapability prop from hardware info"
      pattern: "voiceCapability"
    - from: "ui/src/components/NexusOnboardingWizard.tsx"
      to: "ui/src/components/onboarding/VoiceStep.tsx"
      via: "passes hardware voiceCapability as prop"
      pattern: "voiceCapability"
---

<objective>
Onboarding voice hardware detection — probe for Whisper STT and Piper TTS capability during onboarding and gate the voice enable step accordingly.

Purpose: New installs detect whether the machine can run STT/TTS before offering voice features, preventing users from enabling voice on incapable hardware.
Output: Extended hardware probe with voice capability, updated VoiceStep with hardware-aware UI.
</objective>

<execution_context>
@$HOME/.claude/get-shit-done/workflows/execute-plan.md
@$HOME/.claude/get-shit-done/templates/summary.md
</execution_context>

<context>
@.planning/ROADMAP.md
@.planning/REQUIREMENTS.md
@.planning/phases/39-voice-polish/39-CONTEXT.md

@server/src/services/hardware.ts
@server/src/routes/hardware.ts
@ui/src/components/onboarding/VoiceStep.tsx
@ui/src/components/NexusOnboardingWizard.tsx
@ui/src/hooks/useHardwareInfo.ts

<interfaces>
From server/src/services/hardware.ts:
```typescript
export type HardwareTier = "gpu" | "apple_silicon" | "cpu_only";

export interface HardwareInfo {
  totalGb: number;
  freeGb: number;
  usableGb: number;
  platform: NodeJS.Platform;
  gpuName: string | null;
  gpuVramGb: number | null;
  unifiedMemory: boolean;
  hardwareTier: HardwareTier;
  cpuModel: string | null;
}

export function hardwareService(): { detect(): Promise<HardwareInfo> }
```

From ui/src/components/onboarding/VoiceStep.tsx:
```typescript
interface VoiceStepProps {
  onEnable: () => void;
  onSkip: () => void;
}
// Currently only checks for microphone via navigator.mediaDevices
// Does NOT check if Whisper/Piper binaries are available on server
```

From ui/src/hooks/useHardwareInfo.ts:
```typescript
// Hook that fetches GET /system/providers and returns HardwareInfo
// Used by NexusOnboardingWizard.tsx
```
</interfaces>
</context>

<tasks>

<task type="auto" tdd="true">
  <name>Task 1: Voice capability probe in hardware service and route</name>
  <files>server/src/services/hardware.ts, server/src/routes/hardware.ts, server/src/__tests__/39-voice-hardware-probe.test.ts</files>
  <read_first>
    - server/src/services/hardware.ts (full file — understand detect() and HardwareInfo)
    - server/src/routes/hardware.ts (full file — understand route patterns)
    - server/src/services/voice-pipeline.ts (lines 76-125 — understand whisper/piper detection patterns)
  </read_first>
  <behavior>
    - Test: detectVoiceCapability() returns { whisperAvailable: true, piperAvailable: true } when both binaries resolve via execFile --version
    - Test: detectVoiceCapability() returns { whisperAvailable: false, piperAvailable: false } when both binaries throw ENOENT
    - Test: detectVoiceCapability() returns { whisperAvailable: true, piperAvailable: false } when only whisper is found
    - Test: Hardware tier "cpu_only" with < 4GB RAM sets voiceTierSufficient to false
    - Test: Hardware tier "apple_silicon" with >= 8GB RAM sets voiceTierSufficient to true
  </behavior>
  <action>
    1. In hardware.ts, add a `VoiceCapability` interface:
       ```typescript
       export interface VoiceCapability {
         whisperAvailable: boolean;
         piperAvailable: boolean;
         voiceTierSufficient: boolean;  // true if hardware tier >= apple_silicon OR (cpu_only with >= 4GB free)
       }
       ```

    2. Extend HardwareInfo interface with `voiceCapability: VoiceCapability`.

    3. Add `async detectVoiceCapability(): Promise<VoiceCapability>` to hardwareService:
       - Probe whisper-cpp: try `execFile("whisper-cpp", ["--help"])` with 2s timeout. If resolves → whisperAvailable=true. If ENOENT → try `execFile("whisper", ["--help"])` as fallback. Both fail → false.
       - Probe piper: try `execFile("piper", ["--help"])` with 2s timeout. If resolves → piperAvailable=true. Catch → false.
       - voiceTierSufficient: true if hardwareTier is "apple_silicon" or "gpu", OR if "cpu_only" with freeGb >= 4
       - Use execFile from node:child_process with promisify pattern (or the existing execFileAsync if extracted)

    4. Call detectVoiceCapability() inside detect() AFTER the existing hardware detection, add result to HardwareInfo. Use a separate 3s timeout to avoid slowing down hardware detection if voice probes hang.

    5. In hardware.ts route: no changes needed — it already returns the full HardwareInfo object from detect(), so voiceCapability will be included automatically.

    6. Write tests in 39-voice-hardware-probe.test.ts:
       - Mock execFile (child_process) to test whisper/piper detection
       - Test voiceTierSufficient logic for each hardware tier
       - Test that detectVoiceCapability timeout does not exceed 3s
  </action>
  <verify>
    <automated>cd /opt/nexus && npx vitest run server/src/__tests__/39-voice-hardware-probe.test.ts --reporter=verbose 2>&1 | tail -30</automated>
  </verify>
  <acceptance_criteria>
    - grep -q "VoiceCapability" server/src/services/hardware.ts
    - grep -q "whisperAvailable" server/src/services/hardware.ts
    - grep -q "piperAvailable" server/src/services/hardware.ts
    - grep -q "voiceTierSufficient" server/src/services/hardware.ts
    - grep -q "voiceCapability" server/src/services/hardware.ts
    - test -f server/src/__tests__/39-voice-hardware-probe.test.ts
  </acceptance_criteria>
  <done>
    - HardwareInfo includes voiceCapability with whisperAvailable, piperAvailable, voiceTierSufficient
    - Binary detection probes whisper-cpp/whisper and piper with 2s timeout each
    - voiceTierSufficient is true for apple_silicon/gpu, or cpu_only with >= 4GB free RAM
    - GET /system/providers response now includes voiceCapability object
    - All tests pass
  </done>
</task>

<task type="auto">
  <name>Task 2: VoiceStep hardware-aware UI with conditional enable/skip</name>
  <files>ui/src/components/onboarding/VoiceStep.tsx, ui/src/components/NexusOnboardingWizard.tsx, ui/src/hooks/useHardwareInfo.ts</files>
  <read_first>
    - ui/src/components/onboarding/VoiceStep.tsx (full file)
    - ui/src/components/NexusOnboardingWizard.tsx (full file — understand step 4 voice wiring)
    - ui/src/hooks/useHardwareInfo.ts (full file — understand HardwareInfo type on client)
  </read_first>
  <action>
    1. Update useHardwareInfo.ts: ensure the TypeScript type for hardware info includes the new voiceCapability field. Add:
       ```typescript
       interface VoiceCapability {
         whisperAvailable: boolean;
         piperAvailable: boolean;
         voiceTierSufficient: boolean;
       }
       ```
       Add `voiceCapability?: VoiceCapability` to the HardwareInfo type used in the hook. The "?" makes it backward-compatible if the server hasn't been updated yet.

    2. Update VoiceStep props to accept voice capability:
       ```typescript
       interface VoiceStepProps {
         onEnable: () => void;
         onSkip: () => void;
         voiceCapability?: {
           whisperAvailable: boolean;
           piperAvailable: boolean;
           voiceTierSufficient: boolean;
         };
       }
       ```

    3. Update VoiceStep rendering logic:
       - If voiceCapability is undefined (loading/missing): show current behavior (mic check only)
       - If voiceCapability.voiceTierSufficient === false: show capability note ("Your hardware may not support voice features. Voice requires at least 4GB free RAM."), show Skip button only (no Enable), do NOT auto-skip — let user read the note
       - If voiceCapability.whisperAvailable && voiceCapability.piperAvailable: show green checkmark next to STT and TTS labels ("Whisper detected", "Piper detected"), show Enable + Skip buttons
       - If whisperAvailable but NOT piperAvailable: show checkmark for STT, warning for TTS ("Piper not found — install piper for voice output"), still allow Enable (voice input will work, output won't)
       - If neither available but tier is sufficient: show note "Install whisper-cpp and piper for voice features", show Skip button, dim the Enable button but keep it clickable (user may install later)

    4. In NexusOnboardingWizard.tsx, pass voiceCapability to VoiceStep:
       - hardwareInfo already comes from useHardwareInfo hook
       - Pass `voiceCapability={hardwareInfo?.voiceCapability}` to VoiceStep in step 4

    5. Keep existing microphone detection in VoiceStep — it checks client-side mic availability which is complementary to server-side binary detection.
  </action>
  <verify>
    <automated>cd /opt/nexus && npx tsc --noEmit --project ui/tsconfig.json 2>&1 | tail -20</automated>
  </verify>
  <acceptance_criteria>
    - grep -q "voiceCapability" ui/src/components/onboarding/VoiceStep.tsx
    - grep -q "whisperAvailable" ui/src/components/onboarding/VoiceStep.tsx
    - grep -q "piperAvailable" ui/src/components/onboarding/VoiceStep.tsx
    - grep -q "voiceTierSufficient" ui/src/components/onboarding/VoiceStep.tsx
    - grep -q "voiceCapability" ui/src/components/NexusOnboardingWizard.tsx
    - grep -q "VoiceCapability" ui/src/hooks/useHardwareInfo.ts
  </acceptance_criteria>
  <done>
    - VoiceStep accepts voiceCapability prop and renders conditionally based on hardware detection
    - Sufficient hardware + binaries present: shows enable/skip with green checkmarks
    - Insufficient hardware: shows capability note and skip-only
    - Missing binaries on sufficient hardware: shows install note with dimmed enable
    - NexusOnboardingWizard passes voiceCapability from hardware probe to VoiceStep
    - TypeScript compiles without errors
  </done>
</task>

</tasks>

<verification>
1. TypeScript compiles: `npx tsc --noEmit` for both server and ui
2. Tests pass: `npx vitest run server/src/__tests__/39-voice-hardware-probe.test.ts`
3. VoiceStep renders hardware-aware UI: grep confirms voiceCapability, whisperAvailable, piperAvailable in VoiceStep.tsx
4. Wizard wiring: grep confirms voiceCapability prop passed in NexusOnboardingWizard.tsx
</verification>

<success_criteria>
- ONBRD-01: Onboarding hardware probe reports Whisper STT and Piper TTS capability (whisperAvailable, piperAvailable, voiceTierSufficient in HardwareInfo)
- ONBRD-02: VoiceStep activates enable/skip when hardware is capable, shows capability note when below threshold
- Backward compatible: existing hardware endpoint still works, VoiceStep degrades gracefully if voiceCapability is undefined
</success_criteria>

<output>
After completion, create `.planning/phases/39-voice-polish/39-02-SUMMARY.md`
</output>