Sharp AI — Communication Training App

Sharp trains professionals to speak clearly, concisely, and with substance under pressure. Coaching is grounded in proven communication frameworks from 8 canonical books — but never cites them by name.

Features (MVP)

• Daily 30 — 30-second daily challenge, one question, score + insight
• One Shot — full coaching session with 5-dimension scoring and snippet coaching
• Threaded Challenge — 4-turn escalating follow-ups with thread debrief
• Sharp Duels — async 1v1 challenges, share results
• Context — role, company, situation, dream role, classified document uploads
• Knowledge-grounded coaching — invisible frameworks from communication science

Tech Stack

• Frontend: React Native + Expo SDK 52, Expo Router, TypeScript
• Backend: Node.js + Express
• AI: Claude API (Sonnet) for all intelligence
• Transcription: Groq (Whisper)
• TTS: ElevenLabs (with device fallback)
• Storage: AsyncStorage (local, MVP)

Design

Soft Dawn — light mode, warm cream (#FAF6F0), terracotta (#C07050) accent, sage (#5A9A5A) success.

Setup

1. Backend

cd backend
cp .env.example .env
# Paste your API keys in .env:
#   ANTHROPIC_API_KEY=sk-ant-...
#   GROQ_API_KEY=gsk_...
#   ELEVENLABS_API_KEY=...

npm install
node server.js
# Running on http://localhost:3001

2. App (Fresh Expo project recommended)

Because Expo SDK versions can conflict with cached metro bundles, the cleanest approach is:

# Create a fresh Expo project
npx create-expo-app@latest sharp-fresh --template blank-typescript

# Copy Sharp's code into it
cp -r sharp-v2/app sharp-fresh/app
cp -r sharp-v2/src sharp-fresh/src
cp sharp-v2/app.json sharp-fresh/app.json

# Install dependencies
cd sharp-fresh
npx expo install expo-av expo-speech expo-document-picker expo-file-system \
  expo-haptics expo-router expo-status-bar expo-linking expo-constants \
  expo-sharing expo-clipboard \
  @react-native-async-storage/async-storage @expo/vector-icons \
  react-native-safe-area-context react-native-screens \
  react-native-reanimated react-native-gesture-handler

# Start
npx expo start

3. API Keys

Service	Get key at	Env var
Claude (Anthropic)	console.anthropic.com/settings/keys	ANTHROPIC_API_KEY
Groq (Whisper)	console.groq.com/keys	GROQ_API_KEY
ElevenLabs (TTS)	elevenlabs.io/app/settings/api-keys	ELEVENLABS_API_KEY

Project Structure

app/
├── (tabs)/           # Home, History, Settings
├── daily/            # Daily 30 challenge + result
├── one-shot/         # Question, Recording, Results, Coaching
├── threaded/         # Follow-up, Debrief
├── duel/             # Create, Accept, Waiting, Results
├── context/          # Setup (4 fields), Documents
├── coming-soon/      # Conversation, Analytics
└── session/          # Session detail [id]

src/
├── constants/theme.ts   # Soft Dawn design system
├── types/index.ts       # All TypeScript types
└── services/            # API, storage, scoring, transcription, TTS

backend/
├── server.js            # Express server (6 routes)
├── prompts/index.js     # All Claude prompts
└── .env.example

API Routes

Route	Method	Purpose
/api/health	GET	Health check
/api/question/generate	POST	Generate contextual question
/api/score	POST	Score transcript (5 dimensions + coaching)
/api/threaded/follow-up	POST	Generate escalating follow-up
/api/threaded/debrief	POST	Full thread analysis
/api/transcribe	POST	Groq/Whisper transcription
/api/document/parse	POST	Classify + extract document
/api/tts	GET	ElevenLabs text-to-speech

Costs

Mode	Cost per session
Daily 30	~$0.009
One Shot	~$0.079
Threaded	~$0.328
Duel (incremental)	~$0.009