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---
allowed-tools: Read, Write, Edit, Bash
argument-hint: [rate-limit-type] | --api | --authentication | --file-upload | --database
description: Implement comprehensive API rate limiting with advanced algorithms and user-specific policies
---
# Setup Rate Limiting
Implement comprehensive API rate limiting with advanced control mechanisms: **$ARGUMENTS**
## Current API State
- Framework detection: @package.json or @requirements.txt (Express, FastAPI, Spring Boot, etc.)
- Existing rate limiting: !`grep -r "rate.limit\|throttle\|rateLimit" src/ 2>/dev/null | wc -l`
- Redis availability: !`redis-cli ping 2>/dev/null || echo "Redis not available"`
- API endpoints: !`grep -r "route\|endpoint\|@app\\.route" src/ 2>/dev/null | wc -l`
## Task
Implement production-ready rate limiting system with sophisticated algorithms and user policies:
**Rate Limit Type**: Use $ARGUMENTS to focus on API rate limiting, authentication limiting, file upload controls, or database access limiting
**Rate Limiting Architecture**:
1. **Algorithm Implementation** - Token bucket, sliding window, fixed window, leaky bucket algorithms
2. **User Policies** - Tier-based limits, authenticated vs anonymous, user-specific quotas, IP-based controls
3. **Storage Backend** - Redis integration, distributed rate limiting, persistence strategies, failover mechanisms
4. **Endpoint Configuration** - Per-route limits, method-specific rules, dynamic configuration, A/B testing
5. **Monitoring & Analytics** - Usage tracking, abuse detection, performance metrics, alerting systems
6. **Bypass Mechanisms** - Whitelist management, internal request handling, emergency overrides
**Advanced Features**: Adaptive rate limiting, geo-based controls, API key management, quota systems, abuse prevention.
**Production Readiness**: High availability, performance optimization, security controls, comprehensive monitoring.
**Output**: Complete rate limiting system with intelligent policies, comprehensive monitoring, and advanced abuse prevention capabilities.