Arqivon — System Architecture

FLUTTER MOBILE APP

📷 Camera Capture

1fps JPEG frames · Base64 encoded

🎙️ Microphone

16kHz PCM · mono · echo cancel

🔊 Audio Player

24kHz WAV playback · gapless queue

🎨 Mode UI

Smart Cards · Overlays · PDF Export

Assistant Translator Tutor Support

⚡ WebSocket Client

Auto-reconnect · 5 retries · exp. backoff

📦 Riverpod State

LiveSessionNotifier · reactive UI

GOOGLE CLOUD RUN

🚀 FastAPI WebSocket Relay

Bidirectional bridge · min 1 instance · 1hr timeout · CPU always-on

🔐 Auth Middleware

Firebase token verification

🧠 Mode Router

4 system prompts · per-mode tool sets

📊 Latency Tracer

P50 / P95 / P99 every 30s

🔄 Input Queue

Priority audio · latest-wins video

🛠️ Tool Registry

17 agentic tools dispatched server-side 🔧 17 tools

GOOGLE GEMINI

✨ Gemini 2.5 Flash

Live API · Native Audio
aio.live.connect()

🗣️ Native VAD

Barge-in detection
Real-time interruption
HIGH sensitivity

🔧 Function Calling

Tool declarations per mode
Structured responses

📝 Summary Gen

Session summaries
Daily briefings

FIREBASE & GOOGLE CLOUD

🔑 Firebase Auth

Google · Apple · Email

🗄️ Cloud Firestore

Sessions · Memories · Exports

🔒 Secret Manager

GEMINI_API_KEY injection

📦 Cloud Storage

Documents · Media

Camera + Audio stream via WebSocket

Relay to Gemini via GenAI SDK

Tool calls dispatched + responses returned

Audio + UI actions streamed back to app

Persist to Firestore & Cloud Storage

Audio Stream

Video Frames

Tool Dispatch

Data Persistence

10,600+

Lines of Code

Agentic Tools

Agent Modes

122

Unit Tests

Cloud Services

<1s

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