docs: add comprehensive PRD for Pomodoro Mate

Synthesized PRD from market research, ADHD studies, and gamification
research documents. The PRD covers:

- Product vision and differentiators
- Target personas (ADHD Professional, Productivity Purist, Privacy-Conscious Developer)
- Core features: Timer system, Task management, ADHD-specific features
- Outcome-focused gamification system (Garden metaphor)
- Analytics and insights framework
- Technical architecture (local-first PWA + Tauri)
- Pricing model (freemium)
- 24-week roadmap

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/PRD.md

@@ -0,0 +1,790 @@
+# Pomodoro Mate: Product Requirements Document
+
+**Version:** 1.0
+**Date:** April 2026
+**Status:** Draft
+**Author:** Product Team
+
+---
+
+## Executive Summary
+
+Pomodoro Mate is an open-source, cross-platform Pomodoro timer that combines **authentic Pomodoro methodology** with **ADHD-aware design** and **outcome-oriented gamification**. It targets knowledge workers, students, and particularly users with focus challenges who are dissatisfied with basic timers that don't build lasting habits.
+
+### The Problem
+
+The Pomodoro timer market has 50+ apps, yet none adequately serve users who need:
+1. **True Pomodoro methodology** — Most apps are just timers, ignoring Francesco Cirillo's five-phase process (planning, tracking, recording, processing, visualizing)
+2. **ADHD-aware design** — No major tool is designed from the ground up for executive function challenges; traditional Pomodoro fails 60-70% of ADHD users within the first month
+3. **Outcome-focused gamification** — Existing gamification (Forest, Habitica) rewards output (sessions completed) not outcomes (sustainable habits, personal growth)
+
+### The Solution
+
+Pomodoro Mate fills the white space at the intersection of:
+- **Methodology-complete** Pomodoro implementation
+- **ADHD-first** design philosophy
+- **Outcome-oriented** gamification that builds identity, not just points
+- **Privacy-first**, open-source, cross-platform architecture
+
+### Target Launch
+
+- **MVP (Phase 1):** 8 weeks — Web PWA with core timer, task selection, and basic gamification
+- **Phase 2:** 12 weeks — macOS/iOS native apps with advanced features
+- **Phase 3:** 16 weeks — Developer integrations (GitHub, Linear) and team features
+
+---
+
+## 1. Product Vision
+
+### 1.1 Vision Statement
+
+**For** knowledge workers and students with focus challenges (particularly those with ADHD traits), **who** are dissatisfied with basic timers that don't build lasting habits, **Pomodoro Mate** is the only open-source Pomodoro tool that combines true Pomodoro methodology with ADHD-aware design and outcome-oriented gamification — **helping you** become a more focused person, not just complete more sessions.
+
+### 1.2 Core Differentiators
+
+| Differentiator | Description | Why Competitors Can't Easily Copy |
+|----------------|-------------|-----------------------------------|
+| **Methodology-Complete** | Implements all six steps and five phases of Cirillo's technique | Requires deep integration between timer, tasks, analytics, and AI |
+| **ADHD-First Design** | Every feature filtered through: "Does this reduce executive function burden?" | Requires rethinking every interaction from scratch |
+| **Outcome Gamification** | Rewards sustainable habits and personal growth, not session counts | Requires measuring different metrics and designing different mechanics |
+| **Open Source + Privacy** | Local-first, optional E2E sync, no tracking | Trust differentiator, community contributions |
+
+### 1.3 Success Metrics
+
+| Timeframe | Metric | Target |
+|-----------|--------|--------|
+| **6 months** | Active users | 1,000+ |
+| **6 months** | Pro conversion | 5% |
+| **12 months** | Active users | 5,000+ |
+| **12 months** | GitHub stars | 500+ |
+| **24 months** | Active users | 20,000+ |
+| **24 months** | Revenue sustainability | Break-even |
+
+---
+
+## 2. Market Context
+
+### 2.1 Market Landscape
+
+The Pomodoro app market is **saturated but fragmented**:
+- **500+ Pomodoro-related apps** across iOS, Android, web, and desktop
+- **Productivity app market**: $98B+ by 2025
+- **ADHD-focused app market**: $1.2B+ by 2028
+
+### 2.2 Competitive Positioning
+
+```
+                    HIGH PRICE
+                        │
+         Session        │        Flow
+         ($4.99/mo)     │        ($6.99/mo)
+                        │
+    ────────────────────┼────────────────────
+                        │
+         Forest         │        Pomodone
+         ($3.99)        │        ($4.96/mo)
+                        │
+    ────────────────────┼────────────────────
+                        │
+    Pomofocus           │        Focus To-Do
+    (Free)              │        (Free tier)
+                        │
+         Focus Keeper   │
+         (Free)         │
+                        │
+                    LOW PRICE
+
+    SIMPLE ─────────────────────────── FEATURE-RICH
+```
+
+**Pomodoro Mate Position:** Bottom-right quadrant (Free/Rich) initially, moving to Premium/Rich as Pro features launch.
+
+### 2.3 Key Competitors
+
+| App | Strengths | Weaknesses | Pomodoro Authenticity |
+|-----|-----------|------------|----------------------|
+| **Forest** | Gamification, 2M+ users | No task integration, juvenile feel | 6/10 |
+| **Focus To-Do** | Cross-platform, task+timer | Feature bloat, dated UI | 4/10 |
+| **Session** | Best analytics, macOS native | Apple-only, expensive | 5/10 |
+| **Marinara** | Open source, simple | Browser-only, no mobile | 8/10 |
+| **Super Productivity** | Developer integrations | Complex UI, recent backlash | 7/10 |
+| **Flowkeeper** | Full methodology | Desktop-only, dated UI | 7/10 |
+
+### 2.4 Market Gaps (Our Opportunities)
+
+1. **No tool combines True Pomodoro + Modern Gamification + ADHD Support**
+2. **No cross-platform privacy-first option**
+3. **No tool enforces the original technique's interruption/voiding rules**
+4. **No tool bridges the five phases digitally** (especially Processing phase)
+
+---
+
+## 3. User Personas
+
+### 3.1 Primary Persona: The ADHD Professional
+
+**Name:** Alex
+**Demographics:** 28, software developer, diagnosed ADHD
+**Goals:** Complete work without hyperfocus traps, build sustainable focus habits
+**Pain Points:**
+- Timer anxiety (countdown feels like a threat)
+- Task initiation paralysis ("I can't start")
+- Streak shame (one missed day ruins everything)
+- Feature bloat overwhelming
+- Tools designed for neurotypical brains
+
+**How Pomodoro Mate Helps:**
+- Flexible intervals that adapt to energy levels
+- 1-tap quick start to overcome initiation paralysis
+- Non-anxious visual timer (progress ring, not countdown)
+- Streak freeze and fresh start mechanics
+- Growth metaphors that never subtract
+
+### 3.2 Secondary Persona: The Productivity Purist
+
+**Name:** Jordan
+**Demographics:** 35, product manager, Pomodoro practitioner for 5 years
+**Goals:** Faithful technique implementation, better estimation skills
+**Pain Points:**
+- Apps allow too much customization (breaks the method)
+- No interruption tracking
+- No estimation vs. actual analysis
+- Analytics are superficial
+
+**How Pomodoro Mate Helps:**
+- Purist Mode: Fixed 25/5/15 intervals with interruption voiding
+- Estimation tracking per task
+- AI-powered estimation correction
+- Weekly technique adherence score
+
+### 3.3 Tertiary Persona: The Privacy-Conscious Developer
+
+**Name:** Sam
+**Demographics:** 32, senior engineer, values open source
+**Goals:** Local-first tool with GitHub integration
+**Pain Points:**
+- Most tools require cloud accounts
+- No code-specific metrics
+- Closed source = no trust
+
+**How Pomodoro Mate Helps:**
+- Local-first, optional E2E sync
+- GitHub/Linear integration
+- Open source, auditable
+- Commit tracking per Pomodoro
+
+---
+
+## 4. Core Features
+
+### 4.1 The Timer System
+
+#### 4.1.1 Flexible Interval Engine
+
+**P0 - MVP**
+
+| Feature | Description | Default |
+|---------|-------------|---------|
+| Work intervals | User-configurable work duration | 25 min |
+| Short breaks | Break after each work session | 5 min |
+| Long breaks | Extended break after N sessions | 15 min |
+| Long break trigger | Sessions before long break | 4 sessions |
+| Auto-start breaks | Automatically start break timer | On |
+| Auto-start work | Automatically start next work session | Off |
+
+**P1 - Post-MVP**
+
+| Feature | Description |
+|---------|-------------|
+| Energy-based suggestions | Morning check-in (1-5 scale) suggests interval length |
+| Adaptive intervals | Learn from patterns, suggest optimal intervals |
+| Flowtime mode | Work until focus drops (count-up instead of countdown) |
+| Hyperfocus detection | Detect extended sessions, offer to continue |
+
+#### 4.1.2 Timer Display
+
+**P0 - MVP**
+
+- **Visual progress ring** (fills clockwise, not countdown — reduces anxiety)
+- **Current phase indicator** (Work / Short Break / Long Break)
+- **Session counter** (2 of 4 sessions before long break)
+- **Current task display** (what am I working on?)
+
+**P1 - Post-MVP**
+
+- **Non-anxious mode**: Hide time remaining, show only progress
+- **Ambient sounds**: Rain, café, lo-fi, binaural beats (5+ options)
+- **Focus music integration**: Spotify/Apple Music playlists
+
+#### 4.1.3 Notifications
+
+**P0 - MVP**
+
+- Sound notification at session end
+- System notification with action buttons
+- Break reminder notification
+
+**P1 - Post-MVP**
+
+- Haptic feedback (mobile)
+- Voice announcements (optional)
+- Slack status auto-update
+
+---
+
+### 4.2 Task Management
+
+#### 4.2.1 Task Selection (Planning Phase)
+
+**P0 - MVP**
+
+| Feature | Description |
+|---------|-------------|
+| Task list | Simple list of tasks for today |
+| Task creation | Add task with title + optional notes |
+| Pomodoro estimate | Estimate how many sessions needed |
+| Task selection | Select which task to work on |
+| Quick add | One-tap "just start" option (no task selection) |
+
+**P1 - Post-MVP**
+
+| Feature | Description |
+|---------|-------------|
+| Task decomposition | Break down large tasks into smaller steps |
+| AI estimation | Suggest estimates based on historical data |
+| Recurring tasks | Daily/weekly recurring tasks |
+| Project grouping | Group tasks by project |
+
+#### 4.2.2 Task Tracking (Tracking Phase)
+
+**P0 - MVP**
+
+- Track completed Pomodoros per task
+- Visual indicator of progress vs. estimate
+- Session notes (optional)
+
+**P1 - Post-MVP**
+
+- Interruption log (internal vs. external)
+- Distraction capture pad
+- Session quality rating (1-5 stars)
+
+#### 4.2.3 Task History (Recording Phase)
+
+**P0 - MVP**
+
+- Daily archive of completed sessions
+- Task completion log
+- Basic export (CSV)
+
+**P1 - Post-MVP**
+
+- Structured daily review prompts
+- Weekly summary generation
+- Pattern analysis ("You focus best on Tuesday mornings")
+
+---
+
+### 4.3 ADHD-Specific Features
+
+#### 4.3.1 Task Initiation Scaffolding
+
+**P0 - MVP**
+
+| Feature | Description |
+|---------|-------------|
+| Quick start | 1-tap timer start with no task selection |
+| Micro-sessions | 5-minute "just start" option |
+| First step prompt | "What's the tiniest first step?" |
+
+**P1 - Post-MVP**
+
+| Feature | Description |
+|---------|-------------|
+| Task decomposition helper | AI-powered "break this down" |
+| Motivation priming | 10-second momentum builder |
+| Body doubling mode | Virtual presence of others focusing |
+
+#### 4.3.2 Failure-Spiral Prevention
+
+**P0 - MVP**
+
+| Feature | Description |
+|---------|-------------|
+| Daily fresh start | Every day is a new day, no carryover guilt |
+| Streak freeze | One free pass per week |
+| No penalty for voided sessions | Interruptions happen, that's okay |
+
+**P1 - Post-MVP**
+
+| Feature | Description |
+|---------|-------------|
+| Recovery mode | Gentle re-entry after time away |
+| Self-compassion prompts | "You're not behind, you're here now" |
+| Adjustable strictness | User controls how forgiving the system is |
+
+#### 4.3.3 Hyperfocus Support
+
+**P0 - MVP**
+
+| Feature | Description |
+|---------|-------------|
+| Session extension | Easy "keep going" option |
+| Break skip (with warning) | Allow skipping break, but log it |
+
+**P1 - Post-MVP**
+
+| Feature | Description |
+|---------|-------------|
+| Flow detection | Detect extended sessions, offer to continue |
+| Flow protection | Suppress notifications during hyperfocus |
+| Post-hyperfocus recovery | Suggest longer break after 2+ hour sessions |
+
+#### 4.3.4 Executive Function Externalization
+
+**P1 - Post-MVP**
+
+| Feature | Description |
+|---------|-------------|
+| Distraction pad | Quick-capture intrusive thoughts |
+| Auto task queue | Next task automatically suggested |
+| Decision fatigue reduction | Limit visible choices to 3-5 |
+
+---
+
+### 4.4 Gamification System
+
+#### 4.4.1 Philosophy: Outcome Over Output
+
+**Core Principle:** Reward sustainable habits and identity formation, not session counts.
+
+| Output Metrics (Avoid) | Outcome Metrics (Embrace) |
+|------------------------|---------------------------|
+| Sessions completed | Consistency rhythm development |
+| Total hours focused | Focus quality improvement |
+| Streak days | Recovery after breaks |
+| Points accumulated | Identity evolution ("Deep Worker") |
+
+#### 4.4.2 Growth Metaphor: The Garden
+
+**P0 - MVP**
+
+A personal garden that grows as you develop sustainable focus habits:
+
+| Element | Description | Unlock |
+|---------|-------------|--------|
+| Garden plot | Personal visual space | Default |
+| Plants | Grow with consistent sessions | Session completion |
+| Garden expansion | More space for variety | Weekly consistency |
+| Seasonal themes | Visual variety | Time-based |
+
+**Key Design Principles:**
+- **Growth only, never decay** — Plants don't die if you miss a day
+- **Accumulation, not subtraction** — Everything you build persists
+- **Ambient, not demanding** — Garden is background, not gameplay loop
+
+#### 4.4.3 Identity-Based Progression
+
+**P1 - Post-MVP**
+
+| Level | Title | Unlocked By |
+|-------|-------|-------------|
+| 1 | Seedling | Complete onboarding |
+| 2 | Sprout | 5 consistent days |
+| 3 | Gardener | 2 weeks of practice |
+| 4 | Cultivator | Demonstrate estimation accuracy |
+| 5 | Deep Worker | 30 days of consistent practice |
+| 6 | Focus Master | Maintain habits for 90 days |
+
+**Key Principle:** These are identity labels, not XP levels. They reflect who you're becoming, not points accumulated.
+
+#### 4.4.4 Self-Defined Reward Shop
+
+**P1 - Post-MVP**
+
+Users define their own rewards:
+
+| Reward Type | Example |
+|-------------|---------|
+| Break activities | "15 min walk" |
+| Entertainment | "Watch one episode" |
+| Treats | "Get coffee" |
+| Experiences | "Weekend trip after 30 days" |
+
+**Mechanism:**
+1. User defines rewards with "cost" in focus hours
+2. System tracks progress toward rewards
+3. User "redeems" when earned
+4. No system-defined rewards (avoid generic badges)
+
+#### 4.4.5 Social Features (Cooperative, Not Competitive)
+
+**P2 - Future**
+
+| Feature | Description |
+|---------|-------------|
+| Accountability partners | Paired progress sharing |
+| Body doubling | Virtual presence during sessions |
+| Team challenges | Cooperative (not competitive) goals |
+| Focus rooms | Synchronized team Pomodoros |
+
+**Anti-Patterns to Avoid:**
+- No leaderboards
+- No public comparison
+- No competitive streaks
+- No shame mechanics
+
+---
+
+### 4.5 Analytics & Insights (Processing + Visualizing Phases)
+
+#### 4.5.1 Personal Dashboard
+
+**P0 - MVP**
+
+| Metric | Description |
+|--------|-------------|
+| Today's sessions | Sessions completed today |
+| Today's focus time | Total minutes focused |
+| Current streak | Consecutive days with at least one session |
+
+**P1 - Post-MVP**
+
+| Metric | Description |
+|--------|-------------|
+| Focus quality trend | Are sessions getting more focused? |
+| Best focus times | When you focus best |
+| Estimation accuracy | Predicted vs. actual Pomodoros |
+| Break adherence | Are you taking proper breaks? |
+
+#### 4.5.2 Weekly Insights
+
+**P1 - Post-MVP**
+
+AI-generated insights based on patterns:
+
+| Insight Type | Example |
+|--------------|---------|
+| Pattern recognition | "You focus best on Tuesday mornings" |
+| Estimation coaching | "You estimate 3 but typically need 5 for 'writing'" |
+| Encouragement | "You've improved your consistency 20% this month" |
+| Gentle suggestions | "Consider shorter sessions after lunch" |
+
+#### 4.5.3 GitHub-Style Heatmap
+
+**P0 - MVP**
+
+- Visual contribution graph showing focus history
+- Daily/weekly/monthly views
+- Hover for session details
+
+---
+
+### 4.6 Developer Features
+
+#### 4.6.1 GitHub Integration
+
+**P2 - Future**
+
+| Feature | Description |
+|---------|-------------|
+| Commit tracking | Associate commits with Pomodoro sessions |
+| PR review mode | 25-minute review sessions |
+| Issue time logging | Auto-log time to GitHub issues |
+
+#### 4.6.2 Linear/Jira Integration
+
+**P2 - Future**
+
+| Feature | Description |
+|---------|-------------|
+| Task sync | Import tasks from project management |
+| Time logging | Auto-log Pomodoros to tickets |
+| Standup helper | Generate yesterday's work summary |
+
+---
+
+## 5. Technical Architecture
+
+### 5.1 Platform Priority
+
+| Priority | Platform | Rationale |
+|----------|----------|-----------|
+| 1 | **Web (PWA)** | Lowest friction, cross-platform, fast iteration |
+| 2 | **macOS** | Highest willingness to pay, menu bar valued |
+| 3 | **iOS** | Companion to macOS, widget support |
+| 4 | **Windows** | Large market, lower price sensitivity |
+| 5 | **Android** | Fragmented, lower monetization |
+
+### 5.2 Tech Stack
+
+**Recommended: Web-first PWA + Tauri for desktop**
+
+| Component | Technology | Rationale |
+|-----------|------------|-----------|
+| Frontend | Next.js + React | Fast iteration, SSR/SSG options |
+| Styling | Tailwind CSS | Rapid development, consistent design |
+| PWA | next-pwa | Offline support, installable |
+| Desktop | Tauri | Lightweight, native performance |
+| State | Zustand | Simple, performant state management |
+| Database (local) | SQLite (sql.js) | Full SQL, offline-first |
+| Sync (optional) | ElectricSQL or PowerSync | CRDT-based sync |
+| Auth (optional) | Clerk or Supabase Auth | User management |
+
+### 5.3 Data Architecture
+
+**Local-First Philosophy:**
+
+```
+┌─────────────────────────────────────────────┐
+│                  Client                      │
+├─────────────────────────────────────────────┤
+│  ┌─────────────┐    ┌─────────────────────┐ │
+│  │   SQLite    │───▶│  Optional E2E Sync  │ │
+│  │  (Primary)  │    │   (User's Cloud)    │ │
+│  └─────────────┘    └─────────────────────┘ │
+└─────────────────────────────────────────────┘
+```
+
+**Data Ownership:**
+- All data stored locally by default
+- Optional encrypted sync (user provides cloud or our hosted option)
+- Export to CSV/JSON anytime
+- No vendor lock-in
+
+### 5.4 Privacy & Security
+
+| Principle | Implementation |
+|-----------|----------------|
+| Local-first | Core functionality works offline |
+| No tracking | Zero analytics, telemetry, or tracking |
+| Optional account | Full functionality without account |
+| E2E encryption | All sync is end-to-end encrypted |
+| Open source | Code is auditable |
+| GDPR compliant | Data export, deletion on request |
+
+---
+
+## 6. User Experience
+
+### 6.1 Design Principles
+
+1. **Calm, not anxious** — Timer doesn't threaten, it supports
+2. **Simple by default** — Core flow is 1-tap start
+3. **Progressive disclosure** — Advanced features hidden until needed
+4. **Forgiving, not punitive** — Missing a day is okay
+5. **Beautiful, not distracting** — Design delights without demanding attention
+
+### 6.2 Core User Flows
+
+#### 6.2.1 Quick Start Flow (ADHD-Optimized)
+
+```
+Open App → Tap "Start" → Timer begins
+```
+
+No task selection, no configuration. Just start.
+
+#### 6.2.2 Planned Session Flow
+
+```
+Open App → View Tasks → Select Task → Start Timer
+```
+
+#### 6.2.3 Task Estimation Flow
+
+```
+Add Task → Enter Title → Estimate Pomodoros → Save
+```
+
+Post-session: "You estimated 3, used 4. Update estimate?"
+
+### 6.3 Visual Design
+
+**Aesthetic:** Modern, calm, premium
+
+| Element | Specification |
+|---------|---------------|
+| Primary color | Deep focus blue (#1a1a2e) |
+| Accent | Growth green (#16a34a) |
+| Typography | Geist or Inter |
+| Border radius | 12px (soft, approachable) |
+| Shadows | Subtle elevation, not dramatic |
+| Animations | Smooth, optional (respect reduced motion) |
+
+---
+
+## 7. Pricing Model
+
+### 7.1 Freemium Structure
+
+| Tier | Price | Features |
+|------|-------|----------|
+| **Free** | $0 | Unlimited sessions, basic tasks, local storage, garden gamification |
+| **Pro** | $3.99/month or $29.99/year | Cloud sync, advanced analytics, integrations, team features |
+| **Lifetime** | $79.99 one-time | All Pro features forever |
+
+### 7.2 What's Free vs. Paid
+
+**Always Free:**
+- Core timer (all interval options)
+- Task list
+- Session history
+- Garden gamification
+- All ADHD features
+- Export data
+
+**Pro Only:**
+- Cross-device sync
+- Advanced analytics (patterns, insights)
+- GitHub/Linear integration
+- Team features
+- Priority support
+
+**Rationale:** Core functionality is free. Monetize power users and teams, not basics.
+
+---
+
+## 8. Roadmap
+
+### Phase 1: MVP (Weeks 1-8)
+
+**Goal:** Core timer with task selection and basic gamification
+
+| Week | Deliverables |
+|------|--------------|
+| 1-2 | Timer engine, visual display, system notifications |
+| 3-4 | Task list, task selection, session tracking |
+| 5-6 | Local storage, session history, CSV export |
+| 7-8 | Garden gamification, heatmap, polish |
+
+**Success Criteria:**
+- Functional PWA installable on desktop/mobile
+- Can complete a full Pomodoro session
+- Tasks persist locally
+- Basic gamification works
+
+### Phase 2: Native Apps (Weeks 9-16)
+
+**Goal:** macOS and iOS native apps with advanced features
+
+| Week | Deliverables |
+|------|--------------|
+| 9-10 | macOS menu bar app (Tauri) |
+| 11-12 | iOS app, widgets |
+| 13-14 | Advanced analytics, weekly insights |
+| 15-16 | Cloud sync (optional), Pro tier launch |
+
+**Success Criteria:**
+- Native macOS app in App Store
+- Native iOS app in App Store
+- Cross-device sync working
+- 100+ paying Pro users
+
+### Phase 3: Developer & Team (Weeks 17-24)
+
+**Goal:** Developer integrations and team features
+
+| Week | Deliverables |
+|------|--------------|
+| 17-18 | GitHub integration (commit tracking) |
+| 19-20 | Linear/Jira integration |
+| 21-22 | Team features (shared sessions, team stats) |
+| 23-24 | Body doubling, accountability partners |
+
+**Success Criteria:**
+- 500+ GitHub stars
+- 10+ teams using team features
+- Break-even revenue
+
+---
+
+## 9. Success Metrics & KPIs
+
+### 9.1 Product Metrics
+
+| Metric | Target (6 mo) | Target (12 mo) |
+|--------|---------------|----------------|
+| Daily Active Users | 200 | 1,000 |
+| Weekly Active Users | 500 | 3,000 |
+| Sessions per user per day | 4+ | 4+ |
+| 7-day retention | 30% | 40% |
+| 30-day retention | 15% | 20% |
+
+### 9.2 Business Metrics
+
+| Metric | Target (6 mo) | Target (12 mo) |
+|--------|---------------|----------------|
+| Pro conversion rate | 3% | 5% |
+| Monthly Recurring Revenue | $500 | $3,000 |
+| Customer Acquisition Cost | < $5 | < $10 |
+| Lifetime Value | > $40 | > $60 |
+
+### 9.3 Quality Metrics
+
+| Metric | Target |
+|--------|--------|
+| App Store rating | 4.5+ stars |
+| NPS score | 40+ |
+| Support response time | < 24 hours |
+| Bug reports per month | < 10 |
+
+---
+
+## 10. Risks & Mitigation
+
+| Risk | Likelihood | Impact | Mitigation |
+|------|------------|--------|------------|
+| **Market saturation** | High | Medium | Niche focus (ADHD, purists, developers) |
+| **Feature copying** | High | Low | Speed, community, brand trust |
+| **Monetization failure** | Medium | High | Freemium with clear value prop |
+| **Platform dependency** | Medium | Medium | Web-first, avoid single platform lock-in |
+| **Burnout (solo/small team)** | Medium | High | Open source community, phased launch |
+| **Technique purism backlash** | Low | Low | Clear positioning, make flexibility optional |
+
+---
+
+## 11. Open Questions
+
+| Question | Owner | Decision Date |
+|----------|-------|---------------|
+| Which sync provider to use? | Tech Lead | Week 10 |
+| Native vs. Tauri for desktop? | Tech Lead | Week 8 |
+| Pro pricing final amount? | Product | Week 12 |
+| Which analytics provider (if any)? | Tech Lead | Week 6 |
+| Garden vs. other growth metaphor? | Design | Week 4 |
+
+---
+
+## 12. Appendix
+
+### 12.1 Glossary
+
+| Term | Definition |
+|------|------------|
+| **Pomodoro** | A 25-minute focused work session |
+| **Short break** | 5-minute break between sessions |
+| **Long break** | 15-30 minute break after 4 sessions |
+| **Purist Mode** | Strict Pomodoro with no customization |
+| **Flowtime** | Flexible timing based on focus, not fixed intervals |
+| **Garden** | The gamified growth metaphor |
+
+### 12.2 Research Sources
+
+1. Cirillo, F. (2007). The Pomodoro Technique (Version 1.3)
+2. Market research reports (docs/market-research-*.md)
+3. ADHD studies (docs/study-*.md)
+4. Gamification research (docs/gamify-*.md)
+5. Competitive analysis of 40+ apps
+6. User interviews and feedback synthesis
+
+### 12.3 Document History
+
+| Version | Date | Author | Changes |
+|---------|------|--------|---------|
+| 1.0 | April 2026 | Product Team | Initial PRD |
+
+---
+
+**Document Status:** Ready for Review
+**Next Step:** Stakeholder review and technical feasibility assessment