vercel-reliability-patterns

# Vercel Reliability Patterns

## Prerequisites
- Understanding of circuit breaker pattern
- opossum or similar library installed
- Queue infrastructure for DLQ
- Caching layer for fallbacks

## Instructions

### Step 1: Implement Circuit Breaker
Wrap Vercel calls with circuit breaker.

### Step 2: Add Idempotency Keys
Generate deterministic keys for operations.

### Step 3: Configure Bulkheads
Separate queues for different priorities.

### Step 4: Set Up Dead Letter Queue
Handle permanent failures gracefully.

## Output
- Circuit breaker protecting Vercel calls
- Idempotency preventing duplicates
- Bulkhead isolation implemented
- DLQ for failed operations

## Error Handling

See `{baseDir}/references/errors.md` for comprehensive error handling.

## Examples

See `{baseDir}/references/examples.md` for detailed examples.

## Resources
- [Circuit Breaker Pattern](https://martinfowler.com/bliki/CircuitBreaker.html)
- [Opossum Documentation](https://nodeshift.dev/opossum/)
- [Vercel Reliability Guide](https://vercel.com/docs/reliability)