Growth-First Development
When This Skill Activates
Claude uses this skill when:
- Building features that could have viral mechanics
- Adding referral or sharing functionality
- Implementing analytics and tracking
- Designing for network effects
- Optimizing for activation and retention
Core Frameworks
1. YC Growth Playbook (Source: Gustaf Alstromer, Partner at YC)
The Three Growth Levers:
📈 Acquisition - How users discover you 🎯 Activation - First value experience 🔁 Retention - Users coming back
Priority Order:
"Retention first, activation second, acquisition last. Don't acquire users you can't retain."
Growth Loops:
User gets value → Shares with others → New users → Cycle repeats
Examples:
- Dropbox: More storage for referrals
- Superhuman: Invite-only creates FOMO
- Notion: Shared docs bring collaborators
2. Network Effects Patterns
Types:
Direct Network Effects:
- More users = more value for all
- Example: Social networks, marketplaces
Data Network Effects:
- More usage = smarter product
- Example: Recommendations, AI features
Platform Network Effects:
- More developers = more integrations
- Example: Shopify apps, Zapier
3. Referral Mechanics
Double-Sided Incentive:
Referrer gets: [benefit] Referred gets: [benefit] Both win: [shared value]
Tracking:
javascript// Referral flow generateReferralLink(user) { const link = `app.com/ref/${user.id}`; track('referral_link_generated', { userId: user.id }); return link; } // Attribution onSignup(referralCode) { const referrer = getUserByRefCode(referralCode); track('referral_signup', { referrer: referrer.id, referred: newUser.id }); giveReward(referrer); giveReward(newUser); }
4. Activation Optimization
Time to Value:
"Get users to 'aha moment' as fast as possible"
Activation Milestones:
- Signup complete
- Setup complete
- First value delivered
- Habit formed
Measure:
Activation Rate = (Users who reached value) / (Total signups)
Decision Tree: Growth Feature
NEW FEATURE │ ├─ Can users share this? ──────YES──→ ADD SHARE FUNCTIONALITY │ NO ↓ │ ├─ Creates network effects? ───YES──→ OPTIMIZE FOR VIRAL LOOPS │ NO ↓ │ ├─ First-time experience? ─────YES──→ OPTIMIZE ACTIVATION │ NO ↓ │ ├─ Repeat usage? ──────────────YES──→ INSTRUMENT RETENTION TRACKING │ NO ↓ │ └─ STANDARD FEATURE ←──────────────────┘ (Still track basic analytics)
Action Templates
Template 1: Referral System
markdown# Referral Feature ## Incentive Structure - **Referrer gets:** [reward] - **Referred gets:** [reward] - **Both benefit:** [shared value] ## Implementation ```javascript // Generate referral link const link = generateReferralLink(user); // Track shares track('referral_shared', { channel: ['email', 'social', 'link'], userId: user.id }); // Track conversions track('referral_converted', { referrerId: referrer.id, referredId: newUser.id, timeToConversion: timestamp }); // Reward both giveReward(referrer, 'storage_upgrade'); giveReward(newUser, 'welcome_bonus');
Metrics
- Link generation rate
- Share rate
- Conversion rate (clicked → signed up)
- Activation rate (signed up → activated)
- K-factor (viral coefficient)
### Template 2: Activation Flow ```markdown # Activation Optimization ## Time to Value - Target: <[X] minutes - Current: [Y] minutes ## Activation Funnel 1. **Signup** (100% of signups) 2. **Profile Setup** ([X]%) 3. **First Action** ([X]%) 4. **Aha Moment** ([X]%) 5. **Habit Formation** ([X]%) ## Drop-off Points - Biggest drop-off: [identify] - Why: [hypothesis] - Fix: [solution] ## Implementation ```javascript // Track activation milestones track('activation_milestone', { milestone: 'profile_complete', userId: user.id, timeToComplete: seconds }); // Identify where users drop off if (!completedSetup(user, 24hours)) { sendReminderEmail(user); }
### Template 3: Growth Analytics ```markdown # Growth Metrics Dashboard ## Acquisition - New signups: [X per day] - Channels: [organic, referral, paid] - Cost per acquisition: [$X] ## Activation - Activation rate: [X]% - Time to first value: [X] minutes - Drop-off point: [step in funnel] ## Retention - Day 1: [X]% - Day 7: [X]% - Day 30: [X]% - Retention curve: [improving / flat / declining] ## Referral - K-factor: [X] (viral coefficient) - Referral rate: [X]% of users refer - Conversion rate: [X]% of referred sign up ## Implementation ```javascript // Track key events track('user_activated', { userId, timestamp }); track('user_retained_day7', { userId, timestamp }); track('referral_sent', { referrerId, channel });
## Quick Reference ### 🚀 Growth Checklist **Acquisition:** - [ ] Referral system implemented - [ ] Viral loops identified - [ ] Share buttons prominent **Activation:** - [ ] Time to value < 5 minutes - [ ] Onboarding optimized - [ ] Aha moment clear **Retention:** - [ ] Usage triggers implemented - [ ] Email/push notifications - [ ] Habit formation designed **Analytics:** - [ ] Cohort retention tracking - [ ] Funnel analysis - [ ] Attribution tracking --- ## Real-World Examples ### Example 1: Dropbox Referral **Incentive:** - Referrer: +500MB storage - Referred: +500MB storage - Both win: More space **Result:** 35% of signups from referrals --- ### Example 2: Superhuman Activation **Time to Value:** - < 2 minutes to first email sent - Guided onboarding - Keyboard shortcuts taught early **Result:** 90%+ retention --- ### Example 3: Notion Network Effects **Growth Loop:** - User creates doc → Shares with team → Team joins Notion → Creates more docs → Cycle repeats **Result:** Viral growth in teams --- ## Common Pitfalls ### ❌ Mistake 1: Optimizing Acquisition Before Retention **Problem:** Leaky bucket - users leave as fast as they join **Fix:** Fix retention first, then acquire ### ❌ Mistake 2: No Viral Mechanics **Problem:** Every user requires paid acquisition **Fix:** Build sharing into core features ### ❌ Mistake 3: Slow Activation **Problem:** Users drop off before seeing value **Fix:** Get to aha moment in < 5 minutes --- ## Related Skills - **zero-to-launch** - For building growth into MVP - **metrics-frameworks** - For measuring growth metrics - **exp-driven-dev** - For A/B testing growth features - **user-feedback-system** - For improving retention --- ## Key Quotes **Gustaf Alstromer:** > "Retention first, activation second, acquisition last. Don't pour water into a leaky bucket." **Casey Winters:** > "The best growth loops are built into the product, not bolted on." **Elena Verna:** > "Acquisition is a tax on poor retention." --- ## Further Learning - **references/yc-growth-playbook.md** - Complete YC growth frameworks - **references/referral-examples.md** - Successful referral programs - **references/activation-patterns.md** - Onboarding best practices - **references/retention-strategies.md** - Building habit-forming products
