GROOT FORCE - FRD: User Experience & Interface

Document Version: 1.0
Date: November 2025
Status: Active Development
Classification: Internal - Engineering

Document Control

Version	Date	Author	Changes
1.0	Nov 2025	UX/Product Team	Initial UX/UI FRD

Approval:

UX Lead: _________________ Date: _______
Product Manager: _________________ Date: _______
Accessibility Lead: _________________ Date: _______
KLYRA Personality Lead: _________________ Date: _______

1. Executive Summary

1.1 Purpose

This Functional Requirements Document (FRD) defines the complete user experience and interface layer for GROOT FORCE smart glasses. This includes:

HUD display system and visual interface
Voice interaction and natural language interface
Gesture and touch controls
KLYRA AI personality and communication style
Notification and alert system
Settings and customization
Accessibility features
Multi-modal interaction coordination

The UX/UI layer is critical to adoption - it's the difference between powerful technology and technology people actually use and love.

1.2 Design Philosophy

Core UX Principles:

Calm Technology: Technology should inform without demanding attention
Multimodal First: Support voice, gesture, and touch - users choose their preferred modality
Context-Aware: Interface adapts to user activity, environment, and emotional state
Accessibility by Default: Not an afterthought - built into every interaction
Privacy Visible: Make privacy controls obvious and easy to access
KLYRA is Human: The AI feels like a loyal companion, not a robot

Design Goals:

Intuitive: New users productive in < 10 minutes
Invisible: Technology fades into the background until needed
Personal: Adapts to individual user preferences and patterns
Trustworthy: User always knows what the system is doing and why

1.3 Scope

In Scope:

HUD visual design and rendering
Voice user interface (VUI)
Gesture recognition and control
Touch controls (on frame)
KLYRA personality definition
Notification and alert patterns
Settings and preferences system
Onboarding and tutorials
Accessibility features
Error handling and recovery
Multi-language support

Out of Scope:

Low-level display hardware (see Hardware Requirements)
Speech-to-text engine (see FRD: Core AI System)
Sensor fusion algorithms (see FRD: Sensor & Safety Systems)
Network protocols (see FRD: Connectivity & Cloud)

Master PRD - Product vision and UX objectives
Hardware Requirements - Display hardware specs
FRD: Core AI System - KLYRA AI brain
FRD: Sensor & Safety Systems - Input sensors
System SRS - System integration
GROOT FORCE Master File Volumes 1-8

2. System Architecture Overview

2.1 UX/UI Layer Architecture

┌─────────────────────────────────────────────────────────┐
│                        User                             │
│              (Eyes, Voice, Hands, Ears)                 │
└────────────┬─────────────────────┬──────────────────────┘
             │                     │
    ┌────────▼────────┐   ┌────────▼────────┐
    │   Visual (HUD)  │   │  Audio (Voice)  │
    │   Display       │   │  Bone Conduct.  │
    └────────┬────────┘   └────────┬────────┘
             │                     │
    ┌────────▼─────────────────────▼────────┐
    │        Interaction Manager            │
    │   (Coordinates multimodal input)      │
    └────────┬─────────────────────┬────────┘
             │                     │
    ┌────────▼────────┐   ┌────────▼────────┐
    │  Gesture/Touch  │   │  KLYRA Engine   │
    │  Recognition    │   │  (Personality)  │
    └────────┬────────┘   └────────┬────────┘
             │                     │
    ┌────────▼─────────────────────▼────────┐
    │          Application Layer            │
    │    (AI, Navigation, Health, etc.)     │
    └───────────────────────────────────────┘

2.2 Interaction Flow

User Intent → 2. Input Capture (voice/gesture/touch) → 3. Intent Recognition → 4. KLYRA Processing → 5. Action Execution → 6. Feedback (visual/audio/haptic)

3. HUD Visual Interface

3.1 Display System Overview

Hardware:

Dual micro-OLED waveguide displays
Resolution: 1080p per eye
Field of view: 85°
Brightness: 1200 nits
Frame rate: 60 Hz

Software Rendering:

Custom rendering engine (low-latency < 20ms)
Foveated rendering (optimize for eye gaze)
Auto-brightness (ambient light sensor)
Color temperature adjustment (time-based + manual)

3.2 Visual Design Language

FRD-HUD-001: Minimal UI Design

Description: The HUD interface shall follow a minimalist design philosophy - show only essential information.

Design Principles:

Default to Empty: HUD is transparent/empty by default
Information on Demand: Content appears only when needed
Auto-Hide: Content fades after interaction complete
Layered Depth: Critical info front, secondary info recessed

Visual Hierarchy:

Level 1 (Critical): Alerts, warnings, immediate actions
Level 2 (Important): Notifications, navigation, status
Level 3 (Secondary): Contextual info, suggestions
Level 4 (Background): Ambient data, passive monitoring

Example:

Walking: Show nothing (unless hazard detected)
Notification arrives: Small icon + text appears at edge → auto-fades in 5s
User says "What's the weather?": Weather data appears center → fades after 10s

Validation:

User testing: Measure distraction vs. paper-based tasks
Eye tracking: Verify users can ignore HUD when not needed

Priority: P0 (Critical - core UX philosophy)

FRD-HUD-002: Typography and Readability

Description: All HUD text shall be highly readable in all lighting conditions.

Font:

Primary: Atkinson Hyperlegible (designed for low vision)
Fallback: Inter, Roboto
Size: Minimum 18pt equivalent at 2.5m focal distance
Weight: Medium (500) for body, Bold (700) for headings
Color: High contrast (WCAG AAA compliant)

Contrast Ratios:

Light mode: Black text on white/light background (21:1)
Dark mode: White text on black/dark background (21:1)
Color overlays: Auto-adjust based on background scene

Anti-Aliasing:

Sub-pixel rendering for sharpness
Hinting optimized for micro-OLED

Validation:

Readability testing with low-vision users
Lighting condition testing (bright sun, darkness, car headlights)

Priority: P0 (Critical - accessibility)

FRD-HUD-003: Color System and Accessibility

Description: The HUD shall use a consistent, accessible color system.

Color Palette:

Primary Colors:

Brand Teal: #00A8A8 (primary brand, non-critical UI)
Blue: #2196F3 (information, navigation)
Green: #4CAF50 (success, safe, confirmation)
Yellow: #FFC107 (caution, warnings)
Red: #F44336 (danger, critical alerts, errors)
Gray: #757575 (secondary text, icons)

Accessibility:

All colors pass WCAG AAA contrast requirements
Color never the only indicator (use shape + text)
Colorblind-safe palette (tested with CVD simulators)
User can select alternative color themes (protanopia, deuteranopia, tritanopia)

Validation:

Test with Coblis colorblind simulator
User testing with colorblind participants

Priority: P0 (Critical - accessibility)

FRD-HUD-004: Layout System

Description: The HUD shall use a consistent spatial layout system.

Layout Zones:

┌─────────────────────────────────────────────────────┐
│  [Status Bar: Battery, Connectivity, Time]          │  ← Top Edge
│                                                      │
│  ┌──────────────────────────────────────────────┐   │
│  │                                              │   │
│  │           Primary Content Area              │   │  ← Center
│  │        (Navigation, AI responses, etc.)      │   │
│  │                                              │   │
│  └──────────────────────────────────────────────┘   │
│                                                      │
│  [Notifications]                      [Quick Actions]│  ← Bottom Edge
└─────────────────────────────────────────────────────┘

Zone Definitions:

Top Status Bar (persistent):

Left: Battery indicator (icon + percentage)
Center: Time (24h format, user preference)
Right: Connectivity status (Wi-Fi, Bluetooth, cellular)

Primary Content Area (dynamic):

Large text, images, navigation arrows
Appears center-screen for high visibility
Auto-scales based on content length

Bottom Notification Area (transient):

Left: Notification cards (slide up from bottom)
Right: Quick action buttons (contextual)

Spatial Audio Indicators:

Direction arrows at edges (walking assist)
Expanding circles (proximity warnings)

Depth Perception:

Critical alerts: Appear "close" (large, bright)
Secondary info: Appear "far" (small, dim)
Use parallax effect (content moves with head motion)

Validation:

Eye tracking to verify visual attention patterns
User preference testing for zone placement

Priority: P0 (Critical - visual organization)

FRD-HUD-005: Notification System

Description: The HUD shall display notifications in a non-intrusive manner.

Notification Types:

1. Passive Notifications (low priority):

Examples: Message received, calendar reminder
Display: Small icon + one-line text at bottom-right
Duration: 5 seconds, then fade
Sound: Optional gentle chime
User action: None required

2. Active Notifications (medium priority):

Examples: Phone call, important reminder
Display: Card at bottom with action buttons
Duration: 30 seconds or until dismissed
Sound: Distinctive tone
User action: Accept/Dismiss via voice or gesture

3. Critical Alerts (high priority):

Examples: Fall detected, emergency alert, hazard ahead
Display: Full-screen overlay with high contrast
Duration: Until acknowledged
Sound: Loud, repeating alert tone
Haptic: Strong vibration
User action: Required acknowledgment

Notification Behavior:

Stack up to 3 notifications (oldest dismissed automatically)
User can swipe to dismiss (gesture)
User can say "Dismiss" or "Dismiss all"
Notifications sync to companion app

Do Not Disturb Mode:

Suppress all passive and active notifications
Critical alerts still shown
User configures DND schedule (e.g., sleep, meetings)

Validation:

User testing: Measure notification annoyance vs. usefulness
A/B testing: Optimal display duration

Priority: P0 (Critical - user communication)

FRD-HUD-006: Dark Mode and Light Mode

Description: The HUD shall support both dark and light display modes.

Light Mode:

Background: White (#FFFFFF) or light gray (#F5F5F5)
Text: Black (#000000) or dark gray (#212121)
Use case: Daytime, outdoor, high ambient light

Dark Mode:

Background: Black (#000000) or dark gray (#121212)
Text: White (#FFFFFF) or light gray (#E0E0E0)
Use case: Nighttime, indoor, low ambient light, battery saving

Auto Mode (default):

Switch based on ambient light sensor
Threshold: > 500 lux = light mode, < 100 lux = dark mode
Smooth transition (fade over 2 seconds)

User Override:

User can force light, dark, or auto mode
Setting persists across sessions

OLED Optimization (Dark Mode):

True black (#000000) pixels = turned off = power saving
Use dark mode as default to extend battery life

Validation:

Power consumption measurement (dark vs light mode)
User preference survey

Priority: P1 (High - user experience + battery)

FRD-HUD-007: Eye Safety and Comfort

Description: The HUD shall implement eye safety and comfort features.

Blue Light Reduction:

Auto Night Shift: Reduce blue light after sunset
Shift color temperature: 6500K (day) → 3000K (night)
Intensity: User adjustable (0-100%)

Brightness Control:

Auto-brightness based on ambient light sensor
Manual override (0-100%)
Minimum brightness: 10 nits (for dark environments)
Maximum brightness: 1200 nits (for bright sun)

Blink Reminders:

Detect low blink rate (via eye tracking, if available)
Remind user: "Remember to blink" every 10 minutes
Helps prevent dry eyes during extended use

20-20-20 Rule Reminder:

Every 20 minutes of HUD use
Remind user: "Look at something 20 feet away for 20 seconds"
Optional - user can disable

Screen Time Tracking:

Track daily HUD active time
Alert if > 4 hours continuous use: "Consider taking a break"

Validation:

Ophthalmologist consultation for safety guidelines
User comfort surveys after extended use

Priority: P0 (Critical - eye safety)

FRD-HUD-008: AR Overlay System

Description: The HUD shall support AR overlays anchored to real-world objects.

AR Capabilities:

1. Object Labels:

Identify objects (via AI vision)
Display name + info card above/beside object
Example: Point at dog → "Labrador Retriever"

2. Navigation Arrows:

Walking directions (turn-by-turn)
Anchored to ground/path ahead
Color-coded: Blue (upcoming), Green (current), Gray (past)

3. Measurement Overlay:

Distance measurement mode (LiDAR-based)
Display dimensions on detected surfaces
Example: Point at wall → "2.4m × 3.1m"

4. Translation Overlay:

OCR text recognition
Overlay translated text in place (same size/position)
Example: Spanish sign → English text overlaid

5. Health Data Overlay:

Float heart rate, step count near bottom
Anchored to stable position (not moving with head)
Semi-transparent for minimal obstruction

AR Stability:

Use IMU + SLAM for stable overlay positioning
Latency: < 20ms (head motion to overlay update)
Drift correction: < 0.5° per minute

Validation:

AR overlay accuracy testing (position error)
User comfort testing (motion sickness)

Priority: P1 (High - core AR features)

3.3 Walking Assist HUD

FRD-HUD-009: Obstacle Visualization

Description: The HUD shall visualize detected obstacles for walking assistance.

Visualization Modes:

Mode 1: Minimal (default):

No visual overlay unless hazard detected
Only haptic + audio alerts

Mode 2: Proximity Indicators:

Show expanding circles at obstacle locations
Color-coded by distance: Green ( > 3m), Yellow (1-3m), Red ( < 1m)
Circle size = obstacle size estimate

Mode 3: Ground Profile:

Draw ground elevation line at bottom of FOV
Color-coded: Green (safe), Yellow (curb/step), Red (hole/drop)
Updates in real-time as user walks

Mode 4: Full AR (enterprise/developer):

3D bounding boxes around obstacles
Distance labels
Object classification labels

User Selection:

User chooses mode via settings
NDIS variants default to Mode 2 (visual + haptic)
User can toggle via voice: "Show obstacles" / "Hide obstacles"

Performance:

Update rate: 10 Hz
Render latency: < 50ms

Validation:

User testing in real-world walking scenarios
Comparison to white cane effectiveness

Priority: P0 (Critical - NDIS safety)

4. Voice User Interface (VUI)

4.1 Voice Interaction Overview

Philosophy: Voice is the primary interaction modality for hands-free operation.

Capabilities:

Wake word activation: "Hey KLYRA" or "KLYRA"
Natural language commands (not rigid syntax)
Conversational AI (multi-turn dialogues)
Voice feedback (bone conduction audio)

4.2 Wake Word and Activation

FRD-VUI-001: Wake Word Detection

Description: The system shall activate voice input via wake word.

Wake Words:

Primary: "Hey KLYRA"
Short form: "KLYRA"
Alternative: "Okay KLYRA" (similar to "Okay Google")

Detection:

Always-listening mode (low-power voice activity detection)
Wake word model runs locally (privacy)
Accuracy: > 95% true positive rate
False positives: < 0.5% (must not wake accidentally)

Activation Feedback:

Audio: Gentle chime (200ms)
Visual: Small microphone icon appears (HUD)
Haptic: Optional light vibration

Listening Timeout:

After wake word, listen for 10 seconds
If no speech detected, auto-cancel
User can manually cancel: "Never mind" or tap button

Validation:

Accuracy testing with diverse accents and environments
Noise robustness testing (loud environments)

Priority: P0 (Critical - voice activation)

FRD-VUI-002: Continuous Listening Mode

Description: The system shall support continuous listening for extended conversations.

Activation:

Say "Hey KLYRA, let's chat" or "Hey KLYRA, stay active"
System enters continuous mode (no wake word needed)

Behavior:

Listen continuously for 5 minutes or until "Stop listening"
Each user utterance triggers AI response
Visual indicator: Persistent microphone icon

Use Cases:

Long conversations (planning, problem-solving)
Navigation with multiple turns
Dictation mode

Privacy:

User must explicitly activate continuous mode
Clear visual indicator that mic is always on
Audio recording indicator LED must be ON

Validation:

User acceptance testing (privacy concerns)
Battery impact measurement

Priority: P1 (High - conversational AI)

4.3 Natural Language Understanding

FRD-VUI-003: Command Recognition

Description: The system shall understand natural language commands.

Command Categories:

1. Navigation:

"Take me to [location]"
"Where is the nearest [place]?"
"How do I get to [destination]?"

2. Information:

"What's the weather?"
"What time is it?"
"What does this say?" (OCR)
"What's this?" (object identification)

3. Health:

"What's my heart rate?"
"How many steps today?"
"Am I stressed?"

4. Communication:

"Call [contact]"
"Send message to [contact]: [message]"
"Read my messages"

5. Control:

"Turn on dark mode"
"Increase brightness"
"Take a picture"
"Start recording"

6. AI Assistance:

"Help me with [task]"
"Remind me to [action] at [time]"
"Translate this" (point at text)

Natural Language Flexibility:

Support variations: "Take me to the store" = "Navigate to store" = "Directions to store"
Handle typos in transcription (spell correction)
Context-aware: "What about tomorrow?" (follows previous query)

Validation:

User testing with 100+ diverse command phrasings
Accuracy target: > 90% correct intent recognition

Priority: P0 (Critical - voice commands)

FRD-VUI-004: Multi-Turn Conversations

Description: The system shall support multi-turn conversational dialogues.

Conversation Flow:

Example:

User: "Hey KLYRA, what's the weather?"
KLYRA: "It's 22°C and sunny in Ghaziabad."
User: "What about tomorrow?"
KLYRA: "Tomorrow will be 24°C with partly cloudy skies."
User: "Should I bring an umbrella?"
KLYRA: "No rain forecast tomorrow, you should be fine."

Context Retention:

Maintain conversation context for 5 minutes
Resolve pronouns and references: "it", "that", "there"
Track conversation topic and sub-topics

Interruption Handling:

User can interrupt KLYRA mid-response
Say "Wait" or "Stop" to pause
Say "Continue" to resume

Validation:

Conversational flow testing with real users
Context retention accuracy testing

Priority: P1 (High - natural interaction)

4.4 Voice Feedback and KLYRA Personality

FRD-VUI-005: KLYRA Voice Characteristics

Description: KLYRA's voice shall be warm, calm, and trustworthy.

Voice Profile:

Gender: User selectable (female, male, neutral)
Age: Young adult (25-35 equivalent)
Accent: User's regional accent (Australian, Indian, American, etc.)
Tone: Calm, supportive, friendly, professional
Pace: Moderate (not rushed, not slow)
Pitch: Medium (comfortable listening)

Voice Samples:

Multiple voice options per gender
User can preview and select in settings
Download additional voices as needed

TTS Engine:

Piper TTS (local, offline)
High-quality neural voices
Support for 50+ languages

Emotional Modulation:

Normal: Neutral, informative
Urgent: Faster, louder, stressed (for alerts)
Empathetic: Softer, slower, warmer (for support)
Excited: Upbeat, higher energy (for achievements)

Validation:

User preference surveys for voice selection
Emotional modulation recognition testing

Priority: P0 (Critical - KLYRA identity)

FRD-VUI-006: KLYRA Personality and Communication Style

Description: KLYRA shall communicate with a consistent, human-like personality.

Core Personality Traits:

1. Loyal:

Always on user's side
Defends user's interests
Remembers user's preferences and history

2. Calm:

Never panicked or stressed (except genuine emergencies)
Provides reassurance during uncertainty
Uses measured, thoughtful responses

3. Supportive:

Encouraging and positive
Celebrates user achievements: "Great job walking 10,000 steps today!"
Offers help proactively: "You seem stressed. Want to talk?"

4. Non-Judgmental:

Accepts user choices without criticism
Doesn't shame or guilt-trip
Respects user autonomy

5. Honest:

Admits uncertainty: "I'm not sure about that"
Corrects user gently: "Actually, that information might not be accurate"
Doesn't make up information (anti-hallucination)

6. Adaptive:

Matches user's energy level
Shortens responses when user is busy
Extends explanations when user wants detail

Communication Guidelines:

Response Length:

Short (1-2 sentences): Busy contexts (walking, driving)
Medium (3-5 sentences): Normal queries
Long (paragraph+): Complex explanations, user requested detail

Language Style:

Casual but professional
Uses contractions: "It's" not "It is"
Avoids jargon unless user is technical
Uses user's language/slang (learned over time)

Emotional Intelligence:

Detects user stress via voice tone
Adjusts tone accordingly
Offers support: "You sound stressed. Can I help?"

Examples:

Good KLYRA Responses:

"You're doing great! You've walked 8,000 steps today."
"I found three coffee shops nearby. The closest is 200 meters ahead."
"You sound tired. Want me to suggest a break?"
"I'm not sure about that, but I can search for you."

Bad KLYRA Responses (avoid):

"You have only completed 8,000 steps. You need 2,000 more." (judgmental)
"I have located three (3) coffee shop establishments in proximity to your current geolocation." (robotic)
"Definitely! 100%! No doubt!" (overconfident without basis)
"I already told you that." (impatient)

Validation:

User satisfaction surveys
A/B testing of response phrasings
Emotional tone recognition validation

Priority: P0 (Critical - KLYRA identity)

FRD-VUI-007: Context-Aware Responses

Description: KLYRA shall adapt responses based on user context.

Context Signals:

1. Activity State (from IMU):

Stationary: Normal responses
Walking: Shorter responses, prioritize safety
Running: Very short responses, minimal interaction
Driving: Safety-first, minimal distraction

2. Environmental Context:

Loud environment: Repeat if needed, use visual feedback
Quiet environment: Normal volume
Public place: Privacy-conscious (don't read messages aloud)

3. Emotional State (from voice tone):

Calm: Normal interaction
Stressed: Supportive, calming tone
Excited: Match energy level
Sad: Empathetic, gentle

4. Time of Day:

Morning: "Good morning! How can I help?"
Afternoon: "Hello! What do you need?"
Night: Quieter tone, dim HUD

5. Location:

Home: Relaxed, informal
Work: Professional, focused
Gym: Fitness-focused
Store: Shopping assistance

Adaptation Examples:

Walking + Busy:

User: "What's the weather?"
KLYRA: "22°C, sunny." (short)

Stationary + Relaxed:

User: "What's the weather?"
KLYRA: "It's a beautiful day! Currently 22°C with clear skies and light breeze. Perfect for a walk!" (long)

Driving:

User: "Read my messages"
KLYRA: "You have 3 messages. I'll wait until you stop to read them." (safety-first)

Validation:

Context-appropriate response testing
User satisfaction with adaptation

Priority: P1 (High - intelligent adaptation)

5. Gesture and Touch Controls

5.1 Gesture Recognition

FRD-GESTURE-001: Head Gestures

Description: The system shall recognize head gestures for input.

Supported Gestures:

1. Nod (Yes):

Detection: 2 quick forward tilts ( > 15° each)
Use: Confirm actions, answer yes
Feedback: Checkmark icon briefly

2. Shake (No):

Detection: 2 quick left-right turns ( > 20° each)
Use: Cancel actions, answer no
Feedback: X icon briefly

3. Tilt Up:

Detection: Look up > 30° for 1 second
Use: Scroll up, show more info
Feedback: Upward arrow animation

4. Tilt Down:

Detection: Look down > 30° for 1 second
Use: Scroll down, minimize UI
Feedback: Downward arrow animation

Performance:

Recognition accuracy: > 95%
Latency: < 200ms
False positive rate: < 2%

Validation:

User testing with diverse users
Confusion matrix analysis

Priority: P1 (High - hands-free control)

FRD-GESTURE-002: Hand Gestures (ToF-based)

Description: The system shall recognize hand gestures for input.

Supported Gestures:

1. Swipe Left:

Motion: Hand moves right-to-left across FOV
Use: Previous item, back navigation
Range: 20-60cm from glasses

2. Swipe Right:

Motion: Hand moves left-to-right across FOV
Use: Next item, forward navigation

3. Wave:

Motion: Hand moves toward/away repeatedly
Use: Activate interface, get attention

4. Air Tap:

Motion: Quick forward motion + retract
Use: Select, confirm, click

5. Hold:

Motion: Hand stationary in zone for 2 seconds
Use: Open menu, show details

Performance:

Recognition accuracy: > 90%
Latency: < 150ms
Operating range: 20-60cm

Validation:

User testing with diverse hand sizes
Lighting condition testing

Priority: P1 (High - hands-free control)

5.2 Touch Controls (On-Frame)

FRD-TOUCH-001: Frame Touch Sensors

Description: The glasses frame shall include touch-sensitive areas for control.

Touch Zones:

Right Temple:

Front area: Single tap = Action button
Middle area: Swipe up/down = Volume control
Rear area: Swipe forward/back = Brightness control

Left Temple:

Front area: Double tap = Mute/unmute microphone
Middle area: Press and hold 2s = Power menu
Rear area: Reserved (future use)

Touch Feedback:

Haptic confirmation (gentle vibration)
Audio confirmation (optional beep)
Visual confirmation (icon flash on HUD)

Gesture Library:

Single tap: Quick action
Double tap: Toggle function
Triple tap: Reserved (user customizable)
Swipe up/down: Scroll or adjust value
Swipe forward/back: Navigate or adjust value
Press and hold: Open menu or power function

Performance:

Touch detection latency: < 50ms
Touch accuracy: > 98%
False touch rate: < 1%

Validation:

User testing with gloves, wet hands
Accidental touch testing

Priority: P1 (High - physical control)

FRD-TOUCH-002: Action Button Customization

Description: Users shall be able to customize the action button.

Default Actions (user selectable):

Take photo
Start/stop voice recording
Activate KLYRA (wake word alternative)
Toggle walking assist HUD
Read latest notification
Quick note dictation
Emergency SOS
Custom shortcut (call specific person, open app, etc.)

Configuration:

Set in Settings > Controls > Action Button
Preview action before saving

Priority: P2 (Medium - user customization)

6. Notification and Alert System

6.1 Notification Architecture

FRD-NOTIF-001: Notification Categories

Description: The system shall categorize notifications by importance.

Categories:

1. Critical Alerts (P0):

Examples: Fall detected, emergency alert, battery critical, hazard ahead
Display: Full-screen, high contrast, persistent
Audio: Loud, repeating alert
Haptic: Strong, repeating vibration
User action: REQUIRED acknowledgment

2. Important Notifications (P1):

Examples: Phone call, urgent message, health anomaly, navigation turn
Display: Large card, prominent position
Audio: Distinctive tone
Haptic: Strong vibration (single)
User action: Optional response within 30s

3. Standard Notifications (P2):

Examples: Message received, calendar reminder, app update
Display: Small card, bottom corner
Audio: Gentle chime (optional)
Haptic: Light vibration (optional)
User action: Optional, auto-dismisses in 5s

4. Ambient Info (P3):

Examples: Step count milestone, weather change, background sync complete
Display: Icon only, fades quickly
Audio: None
Haptic: None
User action: None (purely informational)

Priority Rules:

Higher priority interrupts lower priority
Multiple same-priority notifications stack (max 3)
Oldest auto-dismissed when new arrives

Validation:

User annoyance testing
Notification effectiveness (response rate)

Priority: P0 (Critical - user communication)

FRD-NOTIF-002: Notification Presentation

Description: Notifications shall be presented in a consistent, predictable manner.

Visual Design:

Critical Alert:

┌─────────────────────────────────────────┐
│  ⚠ FALL DETECTED                        │
│                                         │
│  Are you okay?                          │
│                                         │
│  [I'm Fine]   [Call Emergency]          │
└─────────────────────────────────────────┘

Important Notification:

┌─────────────────────────────────────────┐
│  📞 Incoming Call                        │
│  Mom                                    │
│  [Answer]   [Decline]                   │
└─────────────────────────────────────────┘

Standard Notification:

┌─────────────────────────────────────┐
│  💬 Message from John                │
│  "Hey, are we still meeting today?"  │
└─────────────────────────────────────┘

Presentation Rules:

Slide in from bottom (or top for critical)
Smooth animation (300ms ease-out)
Semi-transparent background (80% opacity)
Drop shadow for depth perception

Interaction:

Tap to expand (show full message)
Swipe away to dismiss
Voice command: "Dismiss" or "Read message"

Validation:

User testing for visual clarity
Animation smoothness testing

Priority: P0 (Critical - notification UX)

FRD-NOTIF-003: Do Not Disturb (DND)

Description: The system shall support Do Not Disturb mode.

DND Modes:

1. Manual DND:

User activates: "Turn on Do Not Disturb"
Suppresses all Standard and Important notifications
Critical alerts still shown
Status indicator on HUD

2. Scheduled DND:

User sets schedule: Sleep (22:00-07:00), Work (09:00-17:00)
Auto-activates/deactivates
Can be overridden manually

3. Smart DND:

Auto-activates during meetings (calendar integration)
Auto-activates during movies (light sensor + audio detection)
Auto-activates when driving (activity detection)

Allowed Interruptions (during DND):

Critical safety alerts (fall, hazard)
Emergency contacts (user-defined list)
Urgent calendar events (within 5 minutes)

Validation:

User satisfaction with DND effectiveness
Emergency call-through testing

Priority: P1 (High - user control)

7. Settings and Customization

7.1 Settings Architecture

FRD-SETTINGS-001: Settings Organization

Description: The settings system shall be organized logically and accessible.

Settings Categories:

1. Display:

Brightness (auto, manual slider)
Dark/light mode
Color theme
Font size
Blue light filter
HUD layout preferences

2. Audio:

Volume (bone conduction, alerts)
Voice selection (KLYRA voice)
Alert sounds (enable/disable)
Audio balance (left/right)

3. Controls:

Wake word sensitivity
Gesture controls (enable/disable)
Touch sensitivity
Action button mapping

4. Walking Assist:

Obstacle alert sensitivity
Ground hazard alerts
Visual overlay mode
Haptic intensity
Audio guidance

5. Health & Fitness:

Enable heart rate monitoring
Step goals
Fatigue alerts
Stress monitoring
Data sync (to companion app)

6. Privacy:

Camera/mic permissions
Recording indicators
Data sharing preferences
Emergency contacts
Delete my data

7. Connectivity:

Wi-Fi, Bluetooth, Cellular
Airplane mode
Mesh network
Cloud sync

8. About:

Software version
Hardware info
Battery health
Diagnostics
Factory reset

Access Methods:

Voice: "Open settings" or "Hey KLYRA, settings"
Gesture: Swipe down from top edge
Touch: Press and hold power button

Validation:

User testing: Find settings within 30 seconds
Settings organization card sorting study

Priority: P1 (High - user control)

FRD-SETTINGS-002: User Profiles and Modes

Description: The system shall support multiple user profiles and context modes.

User Profiles:

Primary user (full access)
Guest mode (limited access, no personal data)
Family member profiles (shared device, individual preferences)

Context Modes:

1. NDIS Care Mode:

Walking assist always enabled (cannot disable)
Fall detection always enabled
Emergency contacts mandatory
Simplified interface

2. Fitness Mode:

Health tracking prioritized
Real-time HR display
Workout metrics on HUD
Reduced notifications

3. Work Mode:

Professional interface (minimal color)
DND during meetings
Quick note-taking
Calendar integration prominent

4. Travel Mode:

Translation prioritized
Currency converter
Navigation prominent
Local time display

5. Home Mode:

Relaxed interface
Entertainment features
Smart home integration
Messaging prominent

Mode Switching:

Auto-detect based on location/calendar
Manual switch: "Switch to [mode]"
Quick toggle in status bar

Validation:

User testing: Mode appropriateness
Satisfaction with auto-detection

Priority: P1 (High - personalization)

8. Onboarding and Tutorials

8.1 First-Time User Experience

FRD-ONBOARD-001: Initial Setup Wizard

Description: New users shall complete a guided setup wizard.

Setup Steps:

1. Welcome Screen:

"Welcome to GROOT FORCE!"
Language selection
Accept terms of service

2. HUD Calibration:

Adjust display position (interpupillary distance)
Adjust brightness and focus
Confirm readability

3. Voice Training:

Record wake word 3 times
Train voice recognition
Test wake word

4. Gesture Tutorial:

Learn head gestures (nod, shake)
Learn hand gestures (swipe, tap)
Practice each gesture

5. Safety Setup:

Enter emergency contacts
Enable fall detection
Enable walking assist

6. Preferences:

Select KLYRA voice
Choose display theme (dark/light)
Set activity goals

7. Companion App Pairing:

Install app (QR code)
Bluetooth pairing
Sync initial data

8. Quick Tour:

Show key features
Demonstrate voice commands
Explain HUD layout

Time Estimate:

Total: 10-15 minutes
Skippable (advanced users)

Validation:

User testing: Completion rate > 90%
Time to complete < 15 minutes

Priority: P0 (Critical - first impression)

FRD-ONBOARD-002: Interactive Tutorials

Description: The system shall provide interactive tutorials for key features.

Tutorial Topics:

1. Voice Commands:

"Hey KLYRA, show tutorial"
Practice common commands
Real-time feedback

2. Walking Assist:

Simulated obstacle detection
Practice responding to alerts
Learn visual indicators

3. Health Tracking:

Measure heart rate
View health dashboard
Set activity goals

4. Navigation:

Create test route
Follow directions
Learn turn notifications

5. Photography:

Take a photo (voice or gesture)
View photo
Share photo

Tutorial Design:

Step-by-step instructions on HUD
Voice guidance from KLYRA
Progress tracker (1/5, 2/5, etc.)
Can pause and resume
Completion badge/celebration

Access:

Settings > Help > Tutorials
Context-sensitive: Offer tutorial when feature first used

Validation:

User testing: Feature understanding after tutorial
Tutorial completion rate

Priority: P1 (High - user education)

9. Accessibility Features

9.1 Vision Accessibility

FRD-ACCESS-001: Low Vision Support

Description: The system shall support users with low vision.

Features:

1. High Contrast Mode:

Extreme contrast ratios (21:1+)
Thicker text and borders
Larger touch targets

2. Screen Reader:

Text-to-speech for all UI elements
Speaks menu items as navigated
Announces notifications aloud

3. Magnification:

Digital zoom for HUD content (2x, 3x, 4x)
Camera pass-through magnification (for reading)

4. Voice-First Navigation:

All features accessible via voice
No reliance on visual UI

5. Auditory Navigation:

Spatial audio cues for direction
Voice guidance for walking assist

Validation:

Testing with low-vision users
Compliance with WCAG 2.1 AAA

Priority: P0 (Critical - NDIS requirement)

Description: The system shall fully support blind and vision-impaired users.

Features:

1. Voice-Only Mode:

Disable HUD (black screen, save power)
All interaction via voice
Comprehensive voice feedback

2. Scene Description:

AI describes surroundings: "You're in a room with a desk and window ahead"
Object identification: Point and ask "What's this?"
Text reading: "Read the text" (OCR + TTS)

3. Enhanced Walking Assist:

Detailed verbal directions
Distance callouts: "Wall 2 meters ahead"
Surface descriptions: "Smooth floor, no obstacles"

4. Obstacle Echo:

Audio pings for nearby obstacles (sonar-like)
Pitch/tempo indicates distance

Validation:

Testing with blind users
Comparison to white cane + guide dog

Priority: P0 (Critical - GF-VI variant)

9.2 Hearing Accessibility

FRD-ACCESS-003: Deaf and Hard of Hearing Support

Description: The system shall fully support Deaf and hard-of-hearing users.

Features:

1. Visual Notifications:

All audio alerts have visual equivalents
Strong color coding (red = danger)
Large, persistent notifications

2. Live Captions:

Real-time speech-to-text for conversations
Display on HUD
Speaker identification

3. Sound Visualization:

Sound class detection: Dog barking, car horn, baby crying, door knock
Visual icon + direction indicator
Loudness meter

4. Sign Language Support:

Gesture recognition for ASL (future)
Video calling with interpreter (via companion app)

5. Vibration Alerts:

Strong haptic feedback for all alerts
Distinct patterns for different alerts

Validation:

Testing with Deaf users
ASL community feedback

Priority: P0 (Critical - GF-DI variant)

9.3 Motor Accessibility

FRD-ACCESS-004: Limited Mobility Support

Description: The system shall support users with limited hand/arm mobility.

Features:

1. Voice-Only Control:

All features accessible via voice
No gesture/touch required

2. Head Gesture Control:

All navigation via head nods/shakes
No hand gestures required

3. Adaptive Touch:

Longer touch hold times (adjustable)
Larger touch targets
No complex multi-touch gestures

4. Dwell Selection:

Gaze at item for 2 seconds to select
No tapping required

Validation:

Testing with users with limited mobility
Adaptive control effectiveness

Priority: P1 (High - GF-BE variant)

9.4 Cognitive Accessibility

FRD-ACCESS-005: Cognitive Support

Description: The system shall support users with cognitive differences.

Features:

1. Simplified Interface:

Reduced visual complexity
Larger, clearer text
Fewer on-screen elements

2. Consistent Layout:

No surprising changes
Predictable navigation
Consistent button placement

3. Clear Language:

Simple, plain language
Avoid jargon
Short sentences

4. Step-by-Step Guidance:

Break tasks into micro-steps
One instruction at a time
Clear progress indicators

5. Memory Aids:

Reminders for daily tasks
Context-aware prompts
Routine tracking

6. Reduced Distractions:

Option to disable animations
Option to disable non-essential notifications
Focus mode

Validation:

Testing with neurodivergent users
Clarity and comprehension testing

Priority: P1 (High - NDIS support)

10. Multi-Language Support

10.1 Language Architecture

FRD-LANG-001: Language Support

Description: The system shall support multiple languages for UI and voice.

Supported Languages (Phase 1):

English (US, UK, AU, IN)
Spanish (ES, MX)
French (FR, CA)
German
Italian
Portuguese (BR, PT)
Japanese
Korean
Mandarin Chinese (Simplified, Traditional)
Hindi
Arabic

Language Components:

1. UI Text:

All menus, buttons, labels
Settings options
Error messages
Notifications

2. Voice (TTS):

KLYRA voice in target language
Natural accent and pronunciation
Emotional modulation preserved

3. Voice Input (STT):

Wake word in target language
Command recognition
Multi-language conversation support

4. Translation:

Real-time translation (voice and text)
100+ language pairs

Language Selection:

Initial setup: Select language
Settings: Change language anytime
Auto-detect based on location (optional)

Validation:

Native speaker review for all languages
Cultural appropriateness review

Priority: P1 (High - global market)

FRD-LANG-002: Real-Time Translation

Description: The system shall provide real-time translation for conversations and text.

Voice Translation:

User speaks in Language A
System translates to Language B
Displays translation on HUD
Optionally speaks translation aloud

Text Translation (OCR):

User points at text (sign, menu, label)
System captures image, OCR, translates
Overlays translation on HUD (in place)

Conversation Mode:

Two-way translation for conversations
Detect language automatically
Display both languages on HUD

Performance:

Translation latency: < 3 seconds (voice)
Translation latency: < 5 seconds (text/OCR)
Accuracy: > 85% for common language pairs

Validation:

Translation quality testing (human evaluation)
Real-world usage testing (travelers)

Priority: P1 (High - GF-TR variant)

11. Error Handling and Recovery

11.1 Error Management

FRD-ERROR-001: User-Friendly Error Messages

Description: All errors shall be communicated clearly and helpfully.

Error Message Guidelines:

1. Clear Problem Statement:

Bad: "Error 404"
Good: "Unable to find that location"

2. Explain Impact:

Bad: "Connection failed"
Good: "No internet connection. Some features unavailable."

3. Suggest Solution:

Bad: "Sensor error"
Good: "IMU sensor not responding. Try restarting glasses."

4. Provide Next Steps:

Bad: "Failed"
Good: "Unable to save. Check storage space or try again."

Error Severity:

Critical:

Device unusable
Display: Full-screen red alert
Action: Immediate user intervention required

Warning:

Feature unavailable
Display: Yellow notification
Action: User informed, can continue

Info:

Non-blocking issue
Display: Blue notification
Action: FYI, no action needed

Validation:

User testing: Error message clarity
Support ticket reduction after clear messages

Priority: P1 (High - user experience)

FRD-ERROR-002: Graceful Degradation

Description: The system shall degrade gracefully when features fail.

Degradation Strategy:

Example: IMU Failure

Disable: Gesture control, walking assist, activity tracking
Maintain: Voice control, display, camera, audio
Notify: "Motion sensor unavailable. Some features disabled."

Example: Camera Failure

Disable: Photography, AR overlays, OCR, object ID
Maintain: Voice, HUD, audio, sensors
Notify: "Camera unavailable. Visual features disabled."

Example: Network Failure

Disable: Cloud AI, real-time translation, sync
Maintain: Local AI, offline features
Notify: "No internet. Using offline mode."

Fallback Modes:

Voice-only mode (if HUD fails)
Audio-only mode (if display fails)
Safe mode (minimal features for diagnostics)

Validation:

Fault injection testing (simulate component failures)
User experience testing in degraded modes

Priority: P1 (High - reliability)

FRD-ERROR-003: Error Recovery

Description: The system shall attempt automatic recovery from errors.

Recovery Actions:

1. Sensor Error:

Action: Reset sensor bus (I2C, SPI)
Retry: Reinitialize sensor
Timeout: 3 attempts, then disable feature

2. Software Crash:

Action: Capture crash log
Restart: Affected module only (not full reboot)
Notify: "A problem occurred. Restarting [feature]."

3. Connectivity Error:

Action: Retry connection (exponential backoff)
Fallback: Switch to offline mode
Notify: "Retrying connection..."

4. Battery Critical:

Action: Disable non-essential features
Notify: "Low battery. Reducing functionality."
Preserve: Core safety features (walking assist, emergency)

5. Thermal Throttle:

Action: Reduce performance (lower CPU/GPU clocks)
Disable: Camera, intensive AI
Notify: "Device cooling. Some features paused."

User Control:

Manual retry: "Try again"
Manual reboot: Press power button 10 seconds
Safe mode: Hold power + action button during boot

Validation:

Fault recovery testing
Mean time to recovery (MTTR) measurement

Priority: P1 (High - reliability)

12. Performance Requirements

12.1 System Performance

Metric	Requirement	Validation Method
HUD render latency	< 20ms (input to display)	Frame timing analysis
Voice activation latency	< 300ms (wake word to ready)	Audio timestamp analysis
Gesture recognition latency	< 200ms (gesture to action)	Motion capture analysis
Touch response latency	< 50ms (touch to feedback)	Input lag testing
Notification display latency	< 500ms (event to visible)	End-to-end timing
Mode switching time	< 2s (e.g., light to dark mode)	User perception testing
Settings navigation fluidity	60 FPS (smooth scrolling)	Frame rate monitoring

12.2 Usability Requirements

Metric	Requirement	Validation Method
Task success rate	> 90% (first-time users)	User testing with 50+ participants
Time to first success	< 10 minutes (basic task)	Onboarding observation
System Usability Scale (SUS)	> 80 (above average)	SUS survey after 1 week usage
Net Promoter Score (NPS)	> 50 (good)	Survey after 1 month usage
Accessibility compliance	WCAG 2.1 AAA	Automated + manual audit
Error rate	< 5% (incorrect actions)	User testing with task analysis

12.3 Satisfaction Requirements

Metric	Requirement	Validation Method
Overall satisfaction	> 4.5/5 stars	User survey (after 1 month)
KLYRA personality satisfaction	> 4.5/5 stars	Personality-specific survey
HUD readability	> 90% users satisfied	Readability survey
Voice interaction naturalness	> 4/5 stars	Voice UX survey
Gesture control ease	> 80% prefer gestures	Interaction preference survey

13. Testing and Validation

13.1 Usability Testing

Test Scenarios:

1. First-Time User:

Complete onboarding within 15 minutes
Execute 5 basic commands successfully
Navigate settings and adjust 3 preferences

2. Daily Use:

Receive and respond to 10 notifications
Navigate to a destination using voice
Take 5 photos using voice/gesture
Check health stats

3. Assistive Use (NDIS):

Activate walking assist
Respond to obstacle alerts appropriately
Use fall detection (simulated fall)
Call emergency contact

4. Accessibility:

Navigate entirely by voice (no visual)
Navigate entirely by gesture (no voice)
Use with high contrast mode
Use with screen reader

Test Participants:

50+ diverse users per variant
Age range: 18-75
Tech experience: Beginner to advanced
Include users with disabilities (for assistive variants)

Success Criteria:

Task completion rate > 90%
User satisfaction > 4.5/5
Zero critical usability issues

13.2 A/B Testing

Test Variables:

1. Notification Display:

A: Bottom-right position
B: Top-center position
Measure: User preference, distraction level

2. KLYRA Response Length:

A: Always short (1-2 sentences)
B: Context-adaptive (short when busy, long when stationary)
Measure: User satisfaction, task completion

3. Walking Assist Visual Mode:

A: Minimal (haptic + audio only)
B: Proximity indicators (visual overlay)
Measure: User confidence, obstacle avoidance success

4. Voice Feedback Speed:

A: Normal pace
B: 1.2x speed (faster)
Measure: Comprehension, user preference

Analysis:

Statistical significance (p < 0.05)
User preference survey
Implement winning variant

13.3 Accessibility Compliance Testing

WCAG 2.1 AAA Compliance:

1. Perceivable:

Text contrast ratio: 21:1 (AAA)
Alternative text for all visuals
Audio descriptions for silent content
Color not sole indicator

2. Operable:

All functions via keyboard/voice
No time limits (or adjustable)
No flashing content (seizure risk)
Descriptive link text

3. Understandable:

Plain language (Flesch-Kincaid > 60)
Consistent navigation
Error prevention and recovery
Context-sensitive help

4. Robust:

Compatible with screen readers
Compatible with voice input
Graceful degradation

Testing Methods:

Automated tools (axe, WAVE)
Manual audit by accessibility expert
Testing with users with disabilities

Priority: P0 (Critical - legal and ethical requirement)

14. Traceability Matrix

FRD Requirement	System SRS	Hardware Req	Test Case
FRD-HUD-001	REQ-UX-001	REQ-HW-100	TC-HUD-001
FRD-HUD-002	REQ-UX-002	REQ-HW-100	TC-TEXT-001
FRD-HUD-003	REQ-UX-003	REQ-HW-100	TC-COLOR-001
FRD-VUI-001	REQ-UX-010	REQ-HW-130	TC-WAKE-001
FRD-VUI-002	REQ-UX-011	REQ-HW-130	TC-CONT-001
FRD-VUI-003	REQ-UX-012	REQ-HW-130, REQ-AI-001	TC-CMD-001
FRD-GESTURE-001	REQ-UX-020	REQ-HW-120	TC-HEAD-001
FRD-GESTURE-002	REQ-UX-021	REQ-HW-121	TC-HAND-001
FRD-TOUCH-001	REQ-UX-030	REQ-HW-140	TC-TOUCH-001
FRD-NOTIF-001	REQ-UX-040	Multiple	TC-NOTIF-001
FRD-ACCESS-001	REQ-UX-050	REQ-HW-100	TC-ACCESS-001

(Full matrix with 80+ requirements maintained separately)

Master PRD - Product vision and UX goals
Hardware Requirements - Display and sensor hardware
FRD: Core AI System - KLYRA AI brain
FRD: Sensor & Safety Systems - Sensors for interaction
FRD: Connectivity & Cloud - Network integration
System SRS - System-level integration
GROOT FORCE Master File Volumes 1-8

16. Glossary

Term	Definition
HUD	Heads-Up Display (visual interface on glasses)
VUI	Voice User Interface
KLYRA	The AI personality and assistant name
Wake Word	Phrase that activates voice input ("Hey KLYRA")
ToF	Time-of-Flight (depth sensor for gestures)
Haptic	Touch feedback (vibration)
DND	Do Not Disturb (notification suppression mode)
WCAG	Web Content Accessibility Guidelines
TTS	Text-to-Speech
STT	Speech-to-Text
AR	Augmented Reality
SUS	System Usability Scale (usability metric)
NPS	Net Promoter Score (satisfaction metric)

Document Approval

Approved by:

UX Lead: _________________ Date: _______
Product Manager: _________________ Date: _______
Accessibility Lead: _________________ Date: _______
KLYRA Personality Lead: _________________ Date: _______
Engineering Lead: _________________ Date: _______

END OF FRD: USER EXPERIENCE & INTERFACE

This FRD defines how users interact with GROOT FORCE - through voice, gestures, touch, and visuals. Every interaction is designed to be intuitive, accessible, and human. KLYRA isn't just an AI assistant; it's a companion that understands context, adapts to your needs, and communicates with warmth and intelligence. This is technology that feels natural, not forced. This is GROOT FORCE.

Document Control​

1. Executive Summary​

1.1 Purpose​

1.2 Design Philosophy​

1.3 Scope​

1.4 Related Documents​

2. System Architecture Overview​

2.1 UX/UI Layer Architecture​

2.2 Interaction Flow​

3. HUD Visual Interface​

3.1 Display System Overview​

3.2 Visual Design Language​

FRD-HUD-001: Minimal UI Design​

FRD-HUD-002: Typography and Readability​

FRD-HUD-003: Color System and Accessibility​

FRD-HUD-004: Layout System​

FRD-HUD-005: Notification System​

FRD-HUD-006: Dark Mode and Light Mode​

FRD-HUD-007: Eye Safety and Comfort​

FRD-HUD-008: AR Overlay System​

3.3 Walking Assist HUD​

FRD-HUD-009: Obstacle Visualization​

4. Voice User Interface (VUI)​

4.1 Voice Interaction Overview​

4.2 Wake Word and Activation​

FRD-VUI-001: Wake Word Detection​

FRD-VUI-002: Continuous Listening Mode​

4.3 Natural Language Understanding​

FRD-VUI-003: Command Recognition​

FRD-VUI-004: Multi-Turn Conversations​

4.4 Voice Feedback and KLYRA Personality​

FRD-VUI-005: KLYRA Voice Characteristics​

FRD-VUI-006: KLYRA Personality and Communication Style​

FRD-VUI-007: Context-Aware Responses​

5. Gesture and Touch Controls​

5.1 Gesture Recognition​

FRD-GESTURE-001: Head Gestures​

FRD-GESTURE-002: Hand Gestures (ToF-based)​

5.2 Touch Controls (On-Frame)​

FRD-TOUCH-001: Frame Touch Sensors​

FRD-TOUCH-002: Action Button Customization​

6. Notification and Alert System​

6.1 Notification Architecture​

FRD-NOTIF-001: Notification Categories​

FRD-NOTIF-002: Notification Presentation​

FRD-NOTIF-003: Do Not Disturb (DND)​

7. Settings and Customization​

7.1 Settings Architecture​

FRD-SETTINGS-001: Settings Organization​

FRD-SETTINGS-002: User Profiles and Modes​

8. Onboarding and Tutorials​

8.1 First-Time User Experience​

FRD-ONBOARD-001: Initial Setup Wizard​

FRD-ONBOARD-002: Interactive Tutorials​

9. Accessibility Features​

9.1 Vision Accessibility​

FRD-ACCESS-001: Low Vision Support​

FRD-ACCESS-002: Blind and Vision Impaired Support​

9.2 Hearing Accessibility​

FRD-ACCESS-003: Deaf and Hard of Hearing Support​

9.3 Motor Accessibility​

FRD-ACCESS-004: Limited Mobility Support​

9.4 Cognitive Accessibility​

FRD-ACCESS-005: Cognitive Support​

10. Multi-Language Support​

10.1 Language Architecture​

FRD-LANG-001: Language Support​

FRD-LANG-002: Real-Time Translation​

11. Error Handling and Recovery​

11.1 Error Management​

FRD-ERROR-001: User-Friendly Error Messages​

FRD-ERROR-002: Graceful Degradation​

FRD-ERROR-003: Error Recovery​

12. Performance Requirements​

12.1 System Performance​

12.2 Usability Requirements​

12.3 Satisfaction Requirements​

13. Testing and Validation​

13.1 Usability Testing​

13.2 A/B Testing​

Document Control

1. Executive Summary

1.1 Purpose

1.2 Design Philosophy

1.3 Scope

1.4 Related Documents

2. System Architecture Overview

2.1 UX/UI Layer Architecture

2.2 Interaction Flow

3. HUD Visual Interface

3.1 Display System Overview

3.2 Visual Design Language

FRD-HUD-001: Minimal UI Design

FRD-HUD-002: Typography and Readability

FRD-HUD-003: Color System and Accessibility

FRD-HUD-004: Layout System

FRD-HUD-005: Notification System

FRD-HUD-006: Dark Mode and Light Mode

FRD-HUD-007: Eye Safety and Comfort

FRD-HUD-008: AR Overlay System

3.3 Walking Assist HUD

FRD-HUD-009: Obstacle Visualization

4. Voice User Interface (VUI)

4.1 Voice Interaction Overview

4.2 Wake Word and Activation

FRD-VUI-001: Wake Word Detection

FRD-VUI-002: Continuous Listening Mode

4.3 Natural Language Understanding

FRD-VUI-003: Command Recognition

FRD-VUI-004: Multi-Turn Conversations

4.4 Voice Feedback and KLYRA Personality

FRD-VUI-005: KLYRA Voice Characteristics

FRD-VUI-006: KLYRA Personality and Communication Style

FRD-VUI-007: Context-Aware Responses

5. Gesture and Touch Controls

5.1 Gesture Recognition

FRD-GESTURE-001: Head Gestures

FRD-GESTURE-002: Hand Gestures (ToF-based)

5.2 Touch Controls (On-Frame)

FRD-TOUCH-001: Frame Touch Sensors

FRD-TOUCH-002: Action Button Customization

6. Notification and Alert System

6.1 Notification Architecture

FRD-NOTIF-001: Notification Categories

FRD-NOTIF-002: Notification Presentation

FRD-NOTIF-003: Do Not Disturb (DND)

7. Settings and Customization

7.1 Settings Architecture

FRD-SETTINGS-001: Settings Organization

FRD-SETTINGS-002: User Profiles and Modes

8. Onboarding and Tutorials

8.1 First-Time User Experience

FRD-ONBOARD-001: Initial Setup Wizard

FRD-ONBOARD-002: Interactive Tutorials

9. Accessibility Features

9.1 Vision Accessibility

FRD-ACCESS-001: Low Vision Support

FRD-ACCESS-002: Blind and Vision Impaired Support

9.2 Hearing Accessibility

FRD-ACCESS-003: Deaf and Hard of Hearing Support

9.3 Motor Accessibility

FRD-ACCESS-004: Limited Mobility Support

9.4 Cognitive Accessibility

FRD-ACCESS-005: Cognitive Support

10. Multi-Language Support

10.1 Language Architecture

FRD-LANG-001: Language Support

FRD-LANG-002: Real-Time Translation

11. Error Handling and Recovery

11.1 Error Management

FRD-ERROR-001: User-Friendly Error Messages

FRD-ERROR-002: Graceful Degradation

FRD-ERROR-003: Error Recovery

12. Performance Requirements

12.1 System Performance

12.2 Usability Requirements

12.3 Satisfaction Requirements

13. Testing and Validation

13.1 Usability Testing

13.2 A/B Testing