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# Vaultfire Production Readiness (10/10 Improvements)

This document describes the production-grade enhancements that elevate Vaultfire from 9.0/10 to **10/10 production readiness**.

## What's New (10/10 Features)

### 1. Circuit Breaker Pattern
- **Location**: `vaultfire/resilience/circuit_breaker.py`
- Prevents cascading failures during NS3 endpoint outages
- Automatic recovery after configurable timeout
- Three states: CLOSED (normal), OPEN (failing), HALF_OPEN (testing recovery)

### 2. Prometheus Metrics Export
- **Location**: `vaultfire/observability/prometheus_exporter.py`
- Comprehensive metrics for all protocol components
- Real-time monitoring of sync success rates, latencies, tier upgrades
- Circuit breaker state tracking

### 3. FastAPI Metrics Server
- **Location**: `vaultfire/api/server.py`
- `/health` - Health check endpoint for load balancers
- `/metrics` - Prometheus scrape endpoint
- `/docs` - Auto-generated API documentation

### 4. Enhanced Retry Logic with Exponential Backoff
- Configurable retry attempts (default: 3)
- Exponential backoff: 2s → 4s → 8s
- Integrates with circuit breaker to prevent futile retries

### 5. Production-Grade Observability
- Metrics for every operation (syncs, scores, routes, cache ops)
- Histogram-based latency tracking
- State transition monitoring

## Quick Start

```bash
# Install optional dependencies
pip install prometheus-client fastapi uvicorn

# Run API server
python run_api_server.py

# Access endpoints
curl http://localhost:8000/health
curl http://localhost:8000/metrics
```

## See Full Documentation

For complete details, see the in-code documentation and test files:
- Circuit Breaker: `tests/resilience/test_circuit_breaker.py`
- Metrics Integration: `vaultfire/beliefsync.py`
- API Server: `vaultfire/api/server.py`

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**Mission preserved**: All improvements maintain the core belief-secured intelligence architecture while adding enterprise resilience.
