diff --git a/.gitignore b/.gitignore
index 917f5db..216796c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,3 +32,24 @@ Thumbs.db
cv-app
static/psd
static/psd/yo DNI.psd
+
+# Temporary implementation artifacts (prevent clutter)
+*_SUMMARY.md
+*_REPORT.md
+*_COMPLETE.md
+*-COMPLETE.md
+*-FIXES.md
+*-VALIDATION.md
+QUICK_START_*.md
+benchmark_*.sh
+verify_*.sh
+validate_*.sh
+test_*.sh
+final_validation.sh
+
+# Coverage reports
+coverage.html
+coverage.out
+*.coverprofile
+.claude
+playwright.config.js
diff --git a/CACHE_IMPLEMENTATION_SUMMARY.md b/CACHE_IMPLEMENTATION_SUMMARY.md
deleted file mode 100644
index a69de3a..0000000
--- a/CACHE_IMPLEMENTATION_SUMMARY.md
+++ /dev/null
@@ -1,235 +0,0 @@
-# Cache Implementation Summary
-
-## ✅ Implementation Complete
-
-Production-grade JSON caching system successfully implemented with **10x performance improvement** validated through comprehensive testing.
-
-## Files Created
-
-### 1. Core Cache Implementation
-- **`internal/cache/cv_cache.go`** (241 lines)
- - Thread-safe cache with `sync.RWMutex`
- - TTL-based expiration with background cleanup
- - Statistics tracking (hits, misses, hit rate)
- - Type-safe entry validation
- - Cache warming and invalidation APIs
-
-### 2. Modified Files
-- **`internal/models/cv.go`**
- - Added cache initialization (`InitCache()`)
- - Modified `LoadCV()` to use cache-first strategy
- - Modified `LoadUI()` to use cache-first strategy
- - Cache fallback on errors (graceful degradation)
-
-- **`main.go`**
- - Cache initialization with configurable TTL
- - Automatic cache warming for en/es languages
- - Environment variable support (`CACHE_TTL_MINUTES`)
-
-- **`internal/handlers/health.go`**
- - Added cache statistics to health endpoint
- - Real-time monitoring of cache performance
-
-### 3. Test Scripts
-- **`benchmark_cache.sh`** - Comprehensive performance benchmark
-- **`test_concurrency.sh`** - Thread safety validation
-- **`test_ttl.sh`** - TTL expiration testing
-- **`final_validation.sh`** - Complete validation suite
-
-### 4. Documentation
-- **`CACHE_PERFORMANCE.md`** - Detailed performance report
-- **`CACHE_IMPLEMENTATION_SUMMARY.md`** - This file
-
-## Performance Results (Validated)
-
-### Before Caching
-```
-Disk I/O: Every request
-JSON Parse: ~100-200µs per request
-Throughput: Limited by I/O
-```
-
-### After Caching
-```
-Response Time: 2.2ms average (p50)
-Throughput: 1,245 req/sec (concurrent)
-Cache Hit Rate: 99.0%
-Memory Usage: ~400KB (4 entries)
-Failed Requests: 0
-```
-
-### Performance Metrics
-| Metric | Target | Actual | Status |
-|--------|--------|--------|--------|
-| Response Time | <5ms | 2.2ms | ✅ |
-| Cache Hit Rate | >95% | 99.0% | ✅ |
-| Throughput | 1000+ req/s | 1,245 req/s | ✅ |
-| Thread Safety | No races | Validated | ✅ |
-| TTL Expiration | Works | Validated | ✅ |
-
-## Features Implemented
-
-### Core Features
-- ✅ Thread-safe concurrent access (RWMutex)
-- ✅ Configurable TTL (env: `CACHE_TTL_MINUTES`)
-- ✅ Cache warming on startup
-- ✅ Automatic expiration and cleanup
-- ✅ Performance statistics tracking
-- ✅ Graceful degradation on failures
-
-### Monitoring
-- ✅ Real-time cache stats via `/health` endpoint
-- ✅ Hit/miss counters
-- ✅ Hit rate percentage
-- ✅ Cache size tracking
-
-### Testing
-- ✅ Performance benchmarking suite
-- ✅ Concurrency testing (20 clients × 10 requests)
-- ✅ TTL expiration validation
-- ✅ Complete validation script
-
-## Configuration
-
-### Default Settings
-```go
-TTL: 1 hour
-Cleanup Interval: 5 minutes
-Languages: en, es
-```
-
-### Environment Variables
-```bash
-# Set cache TTL in minutes
-export CACHE_TTL_MINUTES=60
-
-# Start server
-./cv-server
-```
-
-## Usage
-
-### Starting the Server
-```bash
-# Build
-go build -o cv-server
-
-# Run with default settings (1 hour TTL)
-./cv-server
-
-# Run with custom TTL (30 minutes)
-CACHE_TTL_MINUTES=30 ./cv-server
-```
-
-### Running Tests
-```bash
-# Full validation suite
-./final_validation.sh
-
-# Performance benchmark
-./benchmark_cache.sh
-
-# Thread safety test
-./test_concurrency.sh
-
-# TTL expiration test
-./test_ttl.sh
-```
-
-### Monitoring Cache
-```bash
-# Check cache statistics
-curl http://localhost:1999/health | jq '.cache'
-
-# Output:
-# {
-# "hits": 402,
-# "misses": 4,
-# "size": 4,
-# "hit_rate_percent": 99.01
-# }
-```
-
-## Architecture
-
-```
-Request Flow:
- Client → LoadCV(lang)
- ↓
- Check Cache
- ↓
- ┌───────┴───────┐
- ↓ ↓
- Cache Hit Cache Miss
- (99% of requests) (1% of requests)
- ↓ ↓
- Return Read File
- (<1µs) Parse JSON
- Store Cache
- Return
- (~200µs)
-```
-
-## Code Quality
-
-### Safety Features
-- Thread-safe: All operations protected by mutexes
-- Type-safe: Runtime type validation for cache entries
-- Error handling: Graceful fallback to disk on cache errors
-- No panics: All errors handled and logged
-
-### Best Practices
-- Single Responsibility: Cache package focused on caching only
-- Dependency Injection: Cache instance managed at package level
-- Configuration: Environment-based configuration
-- Monitoring: Built-in statistics and health checks
-
-## Production Readiness Checklist
-
-- ✅ Thread-safe implementation
-- ✅ Performance tested (1000+ req/s)
-- ✅ Concurrency tested (20 parallel clients)
-- ✅ TTL expiration validated
-- ✅ Memory efficient (<1MB)
-- ✅ Zero external dependencies
-- ✅ Error handling and logging
-- ✅ Health monitoring endpoint
-- ✅ Configuration via environment
-- ✅ Graceful degradation
-- ✅ Documentation complete
-- ✅ Test suite comprehensive
-
-## Next Steps (Optional Enhancements)
-
-### Future Improvements
-1. **File Watching** - Auto-invalidate on JSON changes
-2. **Redis Backend** - Distributed cache for multiple instances
-3. **Compression** - Reduce memory footprint for large datasets
-4. **Metrics Export** - Prometheus integration
-5. **Cache Admin API** - HTTP endpoints for cache management
-
-### Current Limitations
-- In-memory only (not shared across instances)
-- Manual invalidation required for data updates
-- No cache persistence across restarts
-
-These limitations are acceptable for the current use case (single-instance deployment with infrequent data changes).
-
-## Summary
-
-The caching implementation successfully achieves all objectives:
-
-1. **Performance**: 10x improvement validated (2.2ms avg response time)
-2. **Efficiency**: 99% cache hit rate under load
-3. **Thread Safety**: Validated with concurrent clients
-4. **Production Ready**: Comprehensive testing and monitoring
-5. **Maintainable**: Clean architecture, well-documented
-
-The system is ready for production deployment.
-
----
-
-**Status**: ✅ Complete & Validated
-**Performance**: 🚀 10x Improvement Achieved
-**Quality**: ⭐ Production Ready
-**Date**: November 11, 2025
diff --git a/CACHE_PERFORMANCE.md b/CACHE_PERFORMANCE.md
deleted file mode 100644
index 69d9352..0000000
--- a/CACHE_PERFORMANCE.md
+++ /dev/null
@@ -1,253 +0,0 @@
-# JSON Caching Performance Report
-
-## Executive Summary
-
-Implemented production-grade in-memory caching for CV and UI JSON data, achieving **10x performance improvement** and **99.7% cache hit rate** under load.
-
-## Implementation Details
-
-### Components Created
-
-1. **Cache Package** (`internal/cache/cv_cache.go`)
- - Thread-safe using `sync.RWMutex`
- - TTL-based expiration (configurable via `CACHE_TTL_MINUTES`)
- - Background cleanup goroutine
- - Performance statistics tracking
- - Graceful degradation on cache failures
-
-2. **Model Integration** (`internal/models/cv.go`)
- - Modified `LoadCV()` and `LoadUI()` to check cache first
- - Automatic cache population on miss
- - Type-safe cache entries with validation
-
-3. **Application Startup** (`main.go`)
- - Cache initialization with configurable TTL
- - Cache warming for default languages (en, es)
- - Health endpoint with cache statistics
-
-## Performance Results
-
-### Before Implementation
-- **Disk I/O**: Required for every request
-- **JSON Parsing**: 100-200µs per request
-- **Total Overhead**: ~200µs per request minimum
-
-### After Implementation
-
-#### Throughput Performance
-- **Sequential**: 67.25 req/sec (200 requests)
-- **Concurrent (ab)**: 1,161 req/sec (100 concurrent)
-- **Thread Safety**: 487 req/sec (20 parallel clients)
-
-#### Response Time Percentiles
-```
-p50 (median): 2.2ms
-p95: 2.7ms
-p99: 3.4ms
-```
-
-#### Cache Efficiency
-```json
-{
- "hits": 926,
- "misses": 4,
- "size": 4,
- "hit_rate_percent": 99.57
-}
-```
-
-### Performance Improvement
-- **Cache Hit**: <1µs (memory lookup only)
-- **Cache Miss**: ~200µs (disk + parse + cache store)
-- **Improvement Factor**: 200x faster on cache hits
-- **Effective Improvement**: 10-20x on real workloads
-
-## Configuration
-
-### Environment Variables
-
-```bash
-# Cache TTL in minutes (default: 60 minutes)
-CACHE_TTL_MINUTES=60
-
-# Example: 5 minute cache
-CACHE_TTL_MINUTES=5
-```
-
-### Cache Architecture
-
-```
-┌─────────────────┐
-│ Client Request │
-└────────┬────────┘
- │
- ▼
-┌─────────────────┐
-│ LoadCV(lang) │
-└────────┬────────┘
- │
- ▼
- ┌────────┐
- │ Cache? │
- └───┬────┘
- │
- ┌────┴────┐
- │ │
- YES NO
- │ │
- ▼ ▼
-┌──────┐ ┌──────────┐
-│ Hit │ │ Disk I/O │
-│ <1µs │ │ ~200µs │
-└──────┘ └────┬─────┘
- │
- ▼
- ┌─────────┐
- │ Cache │
- │ Store │
- └─────────┘
-```
-
-## Testing & Validation
-
-### Test Scripts Provided
-
-1. **benchmark_cache.sh**: Comprehensive performance benchmark
- - Sequential performance test
- - Concurrent load test (Apache Bench)
- - Response time percentiles
- - Cache statistics reporting
-
-2. **test_concurrency.sh**: Thread safety validation
- - 20 concurrent clients
- - 10 requests per client
- - Verifies no race conditions
-
-3. **test_ttl.sh**: Cache expiration validation
- - Starts server with 5-second TTL
- - Validates cache expiration behavior
- - Ensures stale data is properly evicted
-
-### Running Tests
-
-```bash
-# Performance benchmark
-./benchmark_cache.sh
-
-# Thread safety test
-./test_concurrency.sh
-
-# TTL expiration test
-./test_ttl.sh
-```
-
-## Cache Monitoring
-
-### Health Endpoint
-
-```bash
-curl http://localhost:1999/health | jq '.cache'
-```
-
-**Response:**
-```json
-{
- "hits": 926,
- "misses": 4,
- "size": 4,
- "hit_rate_percent": 99.57
-}
-```
-
-### Metrics Tracked
-- **Hits**: Successful cache retrievals
-- **Misses**: Cache misses requiring disk I/O
-- **Size**: Number of cached entries
-- **Hit Rate**: Percentage of requests served from cache
-
-## Thread Safety
-
-### Concurrency Features
-- `sync.RWMutex` for read/write synchronization
-- Multiple readers can access cache simultaneously
-- Writers block other operations to prevent corruption
-- Atomic statistics updates with separate mutex
-
-### Validation Results
-```
-20 concurrent clients × 10 requests = 200 total requests
-Completed in: 0.41 seconds
-Throughput: 487 req/s
-Cache hit rate: 99.7%
-No data races or corruption detected
-```
-
-## Cache Invalidation
-
-### Manual Invalidation
-```go
-import "github.com/juanatsap/cv-site/internal/models"
-
-// Invalidate specific language
-cache := models.GetCache()
-cache.Invalidate("cv:en")
-
-// Invalidate all cache
-cache.InvalidateAll()
-```
-
-### Automatic Invalidation
-- TTL-based expiration (default: 1 hour)
-- Background cleanup every 5 minutes
-- Expired entries removed automatically
-
-## Production Considerations
-
-### Memory Usage
-- **Per Language**: ~50-100KB for CV data
-- **Total (2 languages)**: ~200-400KB
-- **Overhead**: Negligible for most deployments
-
-### Scalability
-- Cache size grows with number of languages
-- Current implementation handles 2 languages (en, es)
-- Can easily scale to 10+ languages without issues
-
-### Failure Handling
-- Cache failures fallback to disk I/O
-- Application continues to work if cache is unavailable
-- Errors logged but don't disrupt service
-
-## Future Enhancements
-
-### Potential Improvements
-1. **File Watching**: Auto-invalidate cache when JSON files change
-2. **Redis Backend**: Distributed cache for multi-instance deployments
-3. **Cache Warming API**: HTTP endpoint to pre-populate cache
-4. **Metrics Export**: Prometheus metrics for monitoring
-5. **Compression**: LZ4/Snappy compression for larger datasets
-
-### Current Limitations
-- In-memory only (not shared across instances)
-- Manual invalidation required for updates
-- No persistent cache across restarts
-
-## Conclusion
-
-The caching implementation successfully achieves the 10x performance target while maintaining code simplicity and thread safety. The system is production-ready with comprehensive testing and monitoring capabilities.
-
-### Key Achievements
-✅ 10x+ performance improvement
-✅ 99.7% cache hit rate
-✅ Thread-safe concurrent access
-✅ Configurable TTL
-✅ Graceful degradation
-✅ Zero external dependencies
-✅ Comprehensive testing
-✅ Production monitoring
-
----
-
-**Implementation Date**: November 11, 2025
-**Author**: Performance Engineering Team
-**Status**: ✅ Production Ready
diff --git a/CSP-HARDENING-COMPLETE.md b/CSP-HARDENING-COMPLETE.md
deleted file mode 100644
index 4c5495f..0000000
--- a/CSP-HARDENING-COMPLETE.md
+++ /dev/null
@@ -1,352 +0,0 @@
-# CSP Security Hardening - Implementation Complete ✅
-
-## Executive Summary
-
-Successfully removed `unsafe-inline` from Content Security Policy (CSP) while maintaining all functionality. This significantly reduces XSS attack surface by preventing inline JavaScript execution.
-
-## Implementation Overview
-
-### What Was Changed
-
-1. **Extracted Inline JavaScript** → Created `/static/js/main.js`
- - Extracted 506 lines of inline JavaScript from templates
- - All interactive features moved to external file
- - Proper module structure with IIFE wrapper
-
-2. **Implemented Nonce-Based CSP** → Created `/internal/middleware/csp.go`
- - Cryptographically secure nonce generation (128-bit)
- - Unique nonce per request
- - Context-based nonce passing to handlers
-
-3. **Updated CSP Headers** → Modified `/internal/middleware/security.go`
- ```
- BEFORE: script-src 'self' 'unsafe-inline' https://unpkg.com ...
- AFTER: script-src 'self' 'nonce-{random}' https://unpkg.com ...
- ```
-
-4. **Updated Template** → Modified `/templates/index.html`
- - Removed all inline ``
- - Added nonce to Matomo: `
-```
-
-✅ **DO**: Add to external main.js or use nonce
-```html
-
-```
-
-### Best Practice
-- Add all new JavaScript to `/static/js/main.js`
-- Use nonces only for truly critical inline code (e.g., analytics)
-- Test in browser console for CSP violations
-
-## Rollback Plan
-
-If issues arise, rollback by:
-```bash
-git revert HEAD
-# Or restore these specific changes:
-# 1. Restore templates/index.html (add inline scripts back)
-# 2. Restore internal/middleware/security.go (add unsafe-inline back)
-# 3. Remove static/js/main.js
-```
-
-## Future Enhancements
-
-### Optional Improvements
-1. **CSP Reporting**: Add `report-uri` directive
- ```go
- csp += "; report-uri /csp-violation-report"
- ```
-
-2. **Hash-Based CSP for Styles**: Remove `style-src 'self'` exceptions
- ```bash
- # Generate hash for inline styles
- echo -n "body { margin: 0; }" | openssl dgst -sha256 -binary | base64
- ```
-
-3. **Subresource Integrity (SRI)**: Add to CDN scripts
- ```html
-
- ```
-
-4. **CSP Report-Only Mode**: Test stricter policies
- ```go
- w.Header().Set("Content-Security-Policy-Report-Only", stricterCSP)
- ```
-
-5. **Nonce Rotation**: Consider time-based nonce rotation for additional security
-
-## Compliance Documentation
-
-### OWASP ASVS
-- **V5.3.8**: ✅ CSP prevents inline script execution
-- **V5.3.9**: ✅ CSP uses nonces (not just whitelisting)
-- **V14.4.3**: ✅ Security headers configured correctly
-
-### CWE Coverage
-- **CWE-79**: ✅ Cross-site Scripting (XSS) - Mitigated
-- **CWE-1275**: ✅ Sensitive Cookie with Improper SameSite Attribute - N/A
-- **CWE-693**: ✅ Protection Mechanism Failure - Addressed
-
-### PCI DSS (if applicable)
-- **Requirement 6.5.7**: ✅ Cross-site scripting - Mitigated
-- **Requirement 11.3**: ✅ Penetration testing - Ready for testing
-
-## Deployment Checklist
-
-Before deploying to production:
-
-- [x] Code compiles without errors
-- [x] Unit tests pass (if applicable)
-- [x] Integration tests pass
-- [x] Manual browser testing complete
-- [x] CSP headers verified
-- [x] No console errors
-- [x] Performance benchmarking done
-- [ ] Security team review
-- [ ] Stakeholder approval
-- [ ] Rollback plan documented
-- [ ] Monitoring alerts configured
-
-## Support & Troubleshooting
-
-### Common Issues
-
-**Issue**: CSP violations in browser console
-**Solution**: Check that nonce matches between header and HTML
-
-**Issue**: JavaScript not loading
-**Solution**: Verify `/static/js/main.js` exists and is served correctly
-
-**Issue**: Matomo not tracking
-**Solution**: Verify Matomo script has correct nonce attribute
-
-**Issue**: Features not working after deployment
-**Solution**: Clear browser cache and verify all scripts load
-
-### Debug Commands
-```bash
-# Check server is running
-curl -I http://localhost:1999/
-
-# Verify CSP header
-curl -sI http://localhost:1999/ | grep "Content-Security-Policy"
-
-# Check JavaScript file
-curl -s http://localhost:1999/static/js/main.js | head
-
-# Verify nonce in HTML
-curl -s http://localhost:1999/ | grep "nonce="
-
-# Check server logs
-tail -f /tmp/cv-server.log
-```
-
-## Conclusion
-
-✅ **Implementation Complete**: All requirements met
-✅ **Security Hardened**: XSS risk significantly reduced
-✅ **Functionality Verified**: All features working
-✅ **Performance Maintained**: No degradation
-✅ **OWASP Compliant**: Best practices followed
-✅ **Production Ready**: Ready for deployment
-
-The CSP hardening is complete and the application is significantly more secure against XSS attacks while maintaining full functionality.
-
----
-
-**Implementation Date**: 2025-11-11
-**Security Level**: ⬆️ **UPGRADED** (Moderate → Strong)
-**Status**: ✅ **COMPLETE AND VERIFIED**
diff --git a/DEPLOYMENT_SECURITY.md b/DEPLOYMENT_SECURITY.md
deleted file mode 100644
index 5c20831..0000000
--- a/DEPLOYMENT_SECURITY.md
+++ /dev/null
@@ -1,245 +0,0 @@
-# Quick Security Deployment Guide
-
-## Rate Limiter IP Spoofing Protection
-
-### TL;DR
-**Development**: Already configured, spoofing protection active ✅
-**Production**: Update 2 environment variables before deploying
-
----
-
-## Development (Default)
-
-**Configuration** (`.env`):
-```bash
-BEHIND_PROXY=false
-TRUSTED_PROXY_IP=
-```
-
-**What it does**:
-- Ignores all X-Forwarded-For headers
-- Uses actual connection IP (RemoteAddr)
-- Logs all spoofing attempts
-- **Secure by default** ✅
-
-**No action needed** - Already configured!
-
----
-
-## Production Deployment
-
-### Step 1: Identify Your Reverse Proxy IP
-```bash
-# If using nginx/caddy on same server
-TRUSTED_PROXY_IP=127.0.0.1
-
-# If using load balancer
-TRUSTED_PROXY_IP=10.0.0.5 # Your load balancer's internal IP
-
-# If using Cloudflare (not recommended, use Cloudflare IP ranges)
-# See: https://www.cloudflare.com/ips/
-```
-
-### Step 2: Update `.env`
-```bash
-# Change these two lines:
-BEHIND_PROXY=true
-TRUSTED_PROXY_IP=127.0.0.1 # Replace with your proxy IP
-```
-
-### Step 3: Verify Configuration
-```bash
-# Start server
-./cv-site
-
-# Check logs for confirmation
-# Should see: "Rate limiter: Behind proxy mode (trusted proxy: 127.0.0.1)"
-```
-
-### Step 4: Test Rate Limiting
-```bash
-# From your proxy/load balancer, make 4 requests
-for i in {1..4}; do
- curl http://your-site.com/export/pdf?lang=en
-done
-
-# Expected: First 3 succeed, 4th returns 429
-```
-
----
-
-## Security Verification
-
-### ✅ Development Mode Test
-```bash
-# Should be rate limited after 3 requests (same real IP)
-curl -H "X-Forwarded-For: 1.2.3.4" http://localhost:1999/export/pdf
-curl -H "X-Forwarded-For: 5.6.7.8" http://localhost:1999/export/pdf
-curl -H "X-Forwarded-For: 9.9.9.9" http://localhost:1999/export/pdf
-curl -H "X-Forwarded-For: 10.10.10.10" http://localhost:1999/export/pdf # 429
-```
-
-### ✅ Production Mode Test
-```bash
-# Should trust X-Forwarded-For from trusted proxy
-# Test from proxy/load balancer:
-curl -H "X-Forwarded-For: 1.2.3.4" http://backend:1999/export/pdf # OK
-curl -H "X-Forwarded-For: 1.2.3.4" http://backend:1999/export/pdf # OK
-curl -H "X-Forwarded-For: 1.2.3.4" http://backend:1999/export/pdf # OK
-curl -H "X-Forwarded-For: 1.2.3.4" http://backend:1999/export/pdf # 429
-```
-
----
-
-## Monitoring
-
-### Security Logs to Watch
-```bash
-# Spoofing attempts in development
-grep "SECURITY WARNING: X-Forwarded-For" /var/log/app.log
-
-# Untrusted proxy in production
-grep "SECURITY: Request from untrusted proxy" /var/log/app.log
-
-# Invalid IPs
-grep "SECURITY: Invalid IP in X-Forwarded-For" /var/log/app.log
-```
-
-### Rate Limiting Metrics
-```bash
-# 429 responses (rate limited)
-grep "429" /var/log/app.log | wc -l
-
-# By endpoint
-grep "export/pdf" /var/log/app.log | grep "429"
-```
-
----
-
-## Troubleshooting
-
-### Issue: Rate limiting not working in production
-**Symptoms**: All requests succeed, no rate limiting
-**Diagnosis**:
-```bash
-# Check configuration
-env | grep BEHIND_PROXY
-# Should show: BEHIND_PROXY=true
-
-# Check logs
-tail -f /var/log/app.log | grep "Rate limiter"
-# Should see: "Behind proxy mode"
-```
-
-**Fix**:
-1. Verify `.env` has `BEHIND_PROXY=true`
-2. Verify `TRUSTED_PROXY_IP` matches your reverse proxy IP
-3. Restart application
-
-### Issue: All requests rate limited immediately
-**Symptoms**: First request returns 429
-**Diagnosis**:
-```bash
-# Check if proxy IP is wrong
-tail -f /var/log/app.log | grep "untrusted proxy"
-```
-
-**Fix**:
-1. Get correct proxy IP: `ss -tnp | grep :1999`
-2. Update `TRUSTED_PROXY_IP` in `.env`
-3. Restart application
-
-### Issue: Security warnings in production logs
-**Symptoms**: "SECURITY WARNING" logs appearing
-**Diagnosis**: Someone is sending requests with spoofed headers directly to your backend
-
-**Fix**:
-1. Ensure firewall blocks direct access to backend port
-2. Only allow traffic from reverse proxy
-3. Example (iptables):
-```bash
-iptables -A INPUT -p tcp --dport 1999 -s 127.0.0.1 -j ACCEPT
-iptables -A INPUT -p tcp --dport 1999 -j DROP
-```
-
----
-
-## Nginx Configuration Example
-
-If using nginx as reverse proxy:
-
-```nginx
-server {
- listen 80;
- server_name your-domain.com;
-
- location / {
- proxy_pass http://127.0.0.1:1999;
- proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
- proxy_set_header Host $host;
- proxy_set_header X-Real-IP $remote_addr;
- }
-}
-```
-
-**Then set** in `.env`:
-```bash
-BEHIND_PROXY=true
-TRUSTED_PROXY_IP=127.0.0.1
-```
-
----
-
-## Caddy Configuration Example
-
-If using Caddy:
-
-```caddyfile
-your-domain.com {
- reverse_proxy 127.0.0.1:1999
-}
-```
-
-**Then set** in `.env`:
-```bash
-BEHIND_PROXY=true
-TRUSTED_PROXY_IP=127.0.0.1
-```
-
----
-
-## Security Checklist
-
-### Before Production Deployment
-- [ ] Update `BEHIND_PROXY=true` in `.env`
-- [ ] Set correct `TRUSTED_PROXY_IP`
-- [ ] Test rate limiting from proxy
-- [ ] Verify security logs are being written
-- [ ] Ensure firewall blocks direct backend access
-- [ ] Configure reverse proxy to set X-Forwarded-For
-- [ ] Test spoofing attack (should fail)
-- [ ] Set up monitoring/alerting for security logs
-- [ ] Document proxy IP for team
-
-### After Deployment
-- [ ] Monitor rate limiting effectiveness
-- [ ] Check for "SECURITY WARNING" logs
-- [ ] Verify 429 responses are being returned
-- [ ] Test with penetration testing tools
-- [ ] Review security logs weekly
-
----
-
-## Support
-
-**Issue**: Security vulnerability or bypass detected
-**Action**:
-1. Document the attack vector
-2. Check logs: `grep SECURITY /var/log/app.log`
-3. Review this guide for misconfigurations
-4. Contact security team if issue persists
-
-**References**:
-- Implementation: `internal/middleware/security.go`
-- Tests: `internal/middleware/security_test.go`
-- Full report: `SECURITY_VALIDATION.md`
diff --git a/GOROUTINE_LEAK_FIX.md b/GOROUTINE_LEAK_FIX.md
deleted file mode 100644
index 6be20b3..0000000
--- a/GOROUTINE_LEAK_FIX.md
+++ /dev/null
@@ -1,264 +0,0 @@
-# Goroutine Leak Fix - Rate Limiter
-
-## Problem
-The rate limiter's cleanup goroutine ran indefinitely with no way to stop it, causing goroutine leaks on application restarts and in test environments.
-
-### Before Fix
-```go
-func NewRateLimiter(limit int, window time.Duration) *RateLimiter {
- rl := &RateLimiter{
- visitors: make(map[string]*visitor),
- limit: limit,
- window: window,
- }
- go rl.cleanup() // ❌ Goroutine never stops!
- return rl
-}
-
-func (rl *RateLimiter) cleanup() {
- for {
- time.Sleep(time.Minute)
- // Cleanup logic...
- }
-}
-```
-
-**Issues:**
-- Infinite `for` loop with no exit condition
-- No shutdown mechanism
-- Goroutines leaked on every restart
-- Memory accumulation over time
-- Failed goroutine leak detector in tests
-
-## Solution
-Implemented graceful shutdown with channels and context-based timeout control.
-
-### Changes Made
-
-#### 1. Added Shutdown Channels to RateLimiter Struct
-```go
-type RateLimiter struct {
- // ... existing fields ...
- quit chan struct{} // Signal to stop cleanup goroutine
- done chan struct{} // Signal cleanup goroutine has stopped
- shutdownMu sync.Mutex // Protects shutdown state
- isShutdown bool // Tracks if shutdown was already called
-}
-```
-
-#### 2. Updated Constructor to Initialize Channels
-```go
-func NewRateLimiter(limit int, window time.Duration, config RateLimiterConfig) *RateLimiter {
- rl := &RateLimiter{
- clients: make(map[string]*rateLimitEntry),
- limit: limit,
- window: window,
- config: config,
- quit: make(chan struct{}), // NEW
- done: make(chan struct{}), // NEW
- }
- go rl.cleanup()
- return rl
-}
-```
-
-#### 3. Modified cleanup() to Be Stoppable
-```go
-func (rl *RateLimiter) cleanup() {
- ticker := time.NewTicker(1 * time.Minute)
- defer ticker.Stop()
- defer close(rl.done) // Signal cleanup completed
-
- for {
- select {
- case <-ticker.C:
- // Regular cleanup
- rl.mu.Lock()
- now := time.Now()
- for ip, entry := range rl.clients {
- if now.After(entry.resetTime) {
- delete(rl.clients, ip)
- }
- }
- rl.mu.Unlock()
-
- case <-rl.quit:
- // Shutdown signal received
- return // ✅ Goroutine exits cleanly
- }
- }
-}
-```
-
-#### 4. Implemented Shutdown Method
-```go
-// Shutdown stops the cleanup goroutine gracefully
-func (rl *RateLimiter) Shutdown(ctx context.Context) error {
- // Protect against concurrent shutdown calls
- rl.shutdownMu.Lock()
- defer rl.shutdownMu.Unlock()
-
- // If already shutdown, just wait for done or return immediately
- if rl.isShutdown {
- select {
- case <-rl.done:
- return nil
- case <-ctx.Done():
- return ctx.Err()
- default:
- return nil
- }
- }
-
- // Mark as shutdown and close quit channel
- rl.isShutdown = true
- close(rl.quit) // Signal cleanup to stop
-
- // Wait for cleanup to finish or context timeout
- select {
- case <-rl.done:
- return nil
- case <-ctx.Done():
- return ctx.Err()
- }
-}
-```
-
-#### 5. Integrated with Application Shutdown
-```go
-// main.go
-case sig := <-shutdown:
- log.Printf("🛑 Shutdown signal received: %v", sig)
-
- ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
- defer cancel()
-
- // Shutdown rate limiter first
- log.Println("🧹 Shutting down rate limiter...")
- if err := pdfRateLimiter.Shutdown(ctx); err != nil {
- log.Printf("⚠️ Rate limiter shutdown error: %v", err)
- } else {
- log.Println("✓ Rate limiter stopped gracefully")
- }
-
- // Then shutdown HTTP server
- log.Println("🛑 Shutting down HTTP server...")
- if err := server.Shutdown(ctx); err != nil {
- // Handle error...
- }
-```
-
-## Best Practices Implemented
-
-### 1. Graceful Shutdown Pattern
-- **quit channel**: Signals when to stop
-- **done channel**: Confirms cleanup completed
-- **Context timeout**: Prevents indefinite waiting
-- **Resource cleanup**: ticker.Stop() via defer
-
-### 2. Thread Safety
-- **Mutex protection**: Prevents race on shutdown state
-- **Idempotent shutdown**: Safe to call multiple times
-- **Channel synchronization**: Goroutine-safe communication
-
-### 3. Resource Management
-- **No orphaned goroutines**: All cleanup goroutines stop
-- **Proper cleanup order**: Stop cleanup before closing resources
-- **Timeout handling**: Respects context deadlines
-
-## Test Coverage
-
-Comprehensive tests verify the fix:
-
-### TestRateLimiter_GoroutineCleanup
-- Verifies goroutine count before/after shutdown
-- Ensures no goroutine leaks
-
-### TestRateLimiter_ShutdownTimeout
-- Tests timeout behavior with cancelled context
-- Verifies proper error handling
-
-### TestRateLimiter_MultipleShutdowns
-- Ensures multiple shutdown calls don't panic
-- Tests idempotent shutdown behavior
-
-### TestRateLimiter_ConcurrentShutdowns
-- Tests concurrent shutdown calls
-- Verifies thread-safety
-
-### TestRateLimiter_NoGoroutineLeakWithManyInstances
-- Creates 10 rate limiters
-- Verifies no leaks when all shut down
-
-## Validation
-
-Run the validation script to verify the fix:
-
-```bash
-./validate_goroutine_fix.sh
-```
-
-### Expected Results
-```
-✅ All unit tests passed
-✅ No race conditions detected
-✅ Goroutine cleanup verified
-✅ No leaks with multiple instances
-✅ Concurrent shutdowns handled safely
-```
-
-## Before vs After
-
-### Before Fix
-```
-# Starting application
-Goroutines: 5
-
-# After restart #1
-Goroutines: 6 (+1 leaked)
-
-# After restart #10
-Goroutines: 15 (+10 leaked)
-```
-
-### After Fix
-```
-# Starting application
-Goroutines: 5
-
-# After restart #1
-Goroutines: 5 (no leak)
-
-# After restart #10
-Goroutines: 5 (no leak)
-```
-
-## Files Modified
-
-1. **internal/middleware/security.go**
- - Added shutdown channels to RateLimiter struct
- - Updated cleanup() to listen for quit signal
- - Implemented Shutdown() method
-
-2. **main.go**
- - Integrated rate limiter shutdown into graceful shutdown sequence
- - Added logging for shutdown progress
-
-3. **internal/middleware/security_test.go** (NEW)
- - Comprehensive test suite for goroutine cleanup
- - Race condition tests
- - Concurrent shutdown tests
- - Goroutine leak detection tests
-
-## Performance Impact
-
-- **Shutdown time**: <100ms (measured in tests)
-- **Memory overhead**: 2 channels + 1 bool + 1 mutex = negligible
-- **Runtime performance**: No impact on hot path
-- **Startup time**: Unchanged
-
-## References
-
-- Go Goroutine Management: https://go.dev/blog/context
-- Graceful Shutdown Pattern: https://github.com/golang/go/wiki/SignalHandling
-- Testing Goroutine Leaks: https://pkg.go.dev/runtime#NumGoroutine
diff --git a/IMPLEMENTATION_COMPLETE.md b/IMPLEMENTATION_COMPLETE.md
deleted file mode 100644
index f0ad577..0000000
--- a/IMPLEMENTATION_COMPLETE.md
+++ /dev/null
@@ -1,298 +0,0 @@
-# ✅ JSON Caching Implementation - COMPLETE
-
-## Task Summary
-Implemented production-grade JSON caching for CV website achieving **10x performance improvement** with 99% cache hit rate.
-
-## 📊 Verified Performance Results
-
-### Before Caching
-- Disk I/O on every request
-- JSON parsing: ~100-200µs per request
-- Limited throughput by I/O operations
-
-### After Caching (VALIDATED)
-```
-✅ Response Time: 2.24ms average (Target: <5ms)
-✅ Throughput: 1,308 req/sec (Target: 1000+)
-✅ Cache Hit Rate: 99.0% (Target: >95%)
-✅ Memory Usage: ~400KB (Negligible)
-✅ Failed Requests: 0
-✅ Thread Safety: Validated (200 concurrent requests)
-✅ TTL Expiration: Validated (5 second test)
-```
-
-## 📁 Files Created
-
-### 1. Core Implementation
-```
-internal/cache/cv_cache.go (241 lines)
-├── Thread-safe cache with RWMutex
-├── TTL-based expiration
-├── Background cleanup goroutine
-├── Statistics tracking
-└── Cache warming & invalidation APIs
-```
-
-### 2. Modified Files
-```
-internal/models/cv.go
-├── Added: InitCache() function
-├── Added: GetCache() function
-├── Modified: LoadCV() - cache-first strategy
-└── Modified: LoadUI() - cache-first strategy
-
-main.go
-├── Cache initialization
-├── Cache warming (en, es languages)
-└── Environment variable support (CACHE_TTL_MINUTES)
-
-internal/handlers/health.go
-├── Added: CacheInfo struct
-└── Modified: Health endpoint with cache stats
-```
-
-### 3. Test Scripts (All Validated)
-```
-benchmark_cache.sh - Full performance benchmark
-test_concurrency.sh - Thread safety (20 clients × 10 req)
-test_ttl.sh - TTL expiration test
-final_validation.sh - Complete validation suite
-verify_cache.sh - Quick status check
-```
-
-### 4. Documentation
-```
-CACHE_PERFORMANCE.md - Detailed performance report
-CACHE_IMPLEMENTATION_SUMMARY.md - Implementation overview
-IMPLEMENTATION_COMPLETE.md - This file
-```
-
-## 🎯 All Requirements Met
-
-### Core Requirements
-- ✅ Thread-safe cache using sync.RWMutex
-- ✅ TTL-based expiration (1 hour default, configurable)
-- ✅ Cache warming on startup
-- ✅ Cache invalidation methods
-- ✅ Cache statistics (hits, misses, hit rate)
-- ✅ Zero external dependencies
-
-### Performance Requirements
-- ✅ 10x throughput improvement (VALIDATED)
-- ✅ <1µs per cache hit (vs ~200µs disk read)
-- ✅ 1000+ req/sec under load (actual: 1,308)
-- ✅ Thread-safe for concurrent requests
-
-### Implementation Guidelines
-- ✅ Simple in-memory cache (no Redis dependency)
-- ✅ Configurable via environment (CACHE_TTL_MINUTES)
-- ✅ Logging for cache hits/misses
-- ✅ Thread-safe (validated with 200 concurrent requests)
-- ✅ Graceful degradation (fallback to disk on errors)
-
-## 🚀 Usage
-
-### Start Server
-```bash
-# Default settings (1 hour TTL)
-./cv-server
-
-# Custom TTL (30 minutes)
-CACHE_TTL_MINUTES=30 ./cv-server
-```
-
-### Monitor Cache
-```bash
-# Check cache statistics
-curl http://localhost:1999/health | jq '.cache'
-
-# Output:
-# {
-# "hits": 400,
-# "misses": 4,
-# "size": 4,
-# "hit_rate_percent": 99.0
-# }
-```
-
-### Run Tests
-```bash
-# Complete validation
-./final_validation.sh
-
-# Performance benchmark
-./benchmark_cache.sh
-
-# Thread safety
-./test_concurrency.sh
-
-# TTL expiration
-./test_ttl.sh
-```
-
-## 📈 Performance Benchmarks (Actual Results)
-
-### Sequential Performance
-```
-100 requests: 2.24ms average response time
-Throughput: 67 req/sec (single threaded)
-```
-
-### Concurrent Performance (Apache Bench)
-```
-100 requests, 10 concurrent clients
-Throughput: 1,308 req/sec
-Response time: 7.6ms (mean)
-Response time: 0.76ms (per request)
-Failed requests: 0
-```
-
-### Response Time Percentiles
-```
-p50 (median): 2.2ms
-p95: 2.7ms
-p99: 3.4ms
-```
-
-### Cache Efficiency
-```
-Total requests: 404
-Cache hits: 400 (99.0%)
-Cache misses: 4 (1.0%)
-Cached entries: 4 (CV + UI for en, es)
-```
-
-## 🔒 Thread Safety Validation
-
-Tested with 20 concurrent clients making 10 requests each:
-```
-Total requests: 200
-Completed in: 0.41 seconds
-Throughput: 487 req/sec
-Cache hit rate: 99.7%
-Data races: 0
-Corrupted entries: 0
-```
-
-## ⏱️ TTL Expiration Validation
-
-Tested with 5-second TTL:
-```
-Initial state: 4 misses (cache empty)
-After warming: 2 hits (cache populated)
-After 6 seconds: 2 new misses (cache expired)
-Result: TTL working correctly ✅
-```
-
-## 🏗️ Architecture
-
-```
-┌──────────────┐
-│ HTTP Request │
-└──────┬───────┘
- ▼
-┌──────────────┐
-│ LoadCV() │
-│ LoadUI() │
-└──────┬───────┘
- ▼
-┌──────────────┐
-│ Check Cache │
-└──────┬───────┘
- ▼
- Hit? ◄────── 99% of requests
- │ │
- Yes│ │No
- ▼ ▼
- ┌────────┐ ┌────────────┐
- │ Return │ │ Read Disk │
- │ <1µs │ │ Parse JSON │
- └────────┘ │ Store Cache│
- │ Return │
- │ ~200µs │
- └────────────┘
-```
-
-## 🎓 Code Quality
-
-### Safety Features
-- **Thread-safe**: All operations protected by RWMutex
-- **Type-safe**: Runtime validation of cached entries
-- **Error handling**: Graceful fallback to disk on failures
-- **No panics**: All errors logged, never crash
-
-### Best Practices
-- **Single Responsibility**: Cache focused on caching only
-- **Configuration**: Environment-based settings
-- **Monitoring**: Built-in statistics via health endpoint
-- **Testing**: Comprehensive test suite
-
-## 📋 Production Readiness Checklist
-
-- ✅ Performance validated (10x improvement)
-- ✅ Thread safety validated (200 concurrent requests)
-- ✅ TTL expiration validated
-- ✅ Memory efficient (<1MB overhead)
-- ✅ Zero external dependencies
-- ✅ Error handling & logging
-- ✅ Health monitoring endpoint
-- ✅ Configuration via environment
-- ✅ Graceful degradation
-- ✅ Documentation complete
-- ✅ Test suite comprehensive
-
-## 🔮 Future Enhancements (Optional)
-
-### Potential Improvements
-1. File watching - Auto-invalidate on JSON changes
-2. Redis backend - Distributed cache for multi-instance
-3. Compression - Reduce memory for large datasets
-4. Metrics export - Prometheus integration
-5. Admin API - HTTP endpoints for cache management
-
-### Current Limitations (Acceptable)
-- In-memory only (not shared across instances)
-- Manual invalidation for data updates
-- No persistence across restarts
-
-These limitations are acceptable for the current single-instance deployment with infrequent data changes.
-
-## 📊 Performance Comparison
-
-| Metric | Before | After | Improvement |
-|--------|--------|-------|-------------|
-| Disk I/O per request | Yes | No (99% cached) | 99% reduction |
-| JSON parsing per request | Yes | No (99% cached) | 99% reduction |
-| Response time | ~10ms | 2.2ms | 4.5x faster |
-| Throughput (concurrent) | ~200 req/s | 1,308 req/s | **6.5x faster** |
-| Memory overhead | 0 | <1MB | Negligible |
-
-## 🎉 Summary
-
-The JSON caching implementation is **complete, tested, and production-ready**.
-
-### Key Achievements
-- ✅ **10x Performance**: Validated with actual benchmarks
-- ✅ **99% Cache Hit Rate**: Excellent efficiency
-- ✅ **Thread-Safe**: No data races under load
-- ✅ **Production-Ready**: Comprehensive testing passed
-- ✅ **Zero Dependencies**: Simple, maintainable code
-
-### Deliverables
-1. ✅ Complete implementation (cache package + integration)
-2. ✅ Validation commands showing 10x improvement
-3. ✅ Documentation of configuration options
-4. ✅ Comprehensive test suite
-5. ✅ Performance reports and benchmarks
-
----
-
-**Status**: ✅ COMPLETE & VALIDATED
-**Performance Target**: ✅ EXCEEDED (6.5x-10x improvement)
-**Production Ready**: ✅ YES
-**Testing**: ✅ COMPREHENSIVE
-**Documentation**: ✅ COMPLETE
-
-**Implementation Date**: November 11, 2025
-**Implemented By**: Performance Engineering Specialist
-**Validated By**: Automated test suite + manual verification
diff --git a/QUICK_START_CACHE.md b/QUICK_START_CACHE.md
deleted file mode 100644
index 8befa89..0000000
--- a/QUICK_START_CACHE.md
+++ /dev/null
@@ -1,193 +0,0 @@
-# Quick Start - JSON Cache
-
-## TL;DR
-**Status**: ✅ Complete | **Performance**: 10x improvement | **Hit Rate**: 99%
-
-## Run Server
-```bash
-# Build
-go build -o cv-server
-
-# Start (default 1 hour cache TTL)
-./cv-server
-
-# Start with custom TTL (30 minutes)
-CACHE_TTL_MINUTES=30 ./cv-server
-```
-
-## Verify Cache is Working
-```bash
-# Check cache stats
-curl http://localhost:1999/health | jq '.cache'
-
-# Run full validation
-./final_validation.sh
-```
-
-## Test Scripts
-```bash
-./benchmark_cache.sh # Full performance benchmark
-./test_concurrency.sh # Thread safety test
-./test_ttl.sh # TTL expiration test
-./final_validation.sh # Complete validation
-./verify_cache.sh # Quick status check
-```
-
-## Performance Results
-- Response time: **2.2ms** (target: <5ms) ✅
-- Throughput: **1,308 req/sec** (target: 1000+) ✅
-- Cache hit rate: **99%** (target: >95%) ✅
-- Memory usage: **~400KB** (negligible) ✅
-
-## Files
-```
-Created:
- internal/cache/cv_cache.go Cache implementation
- benchmark_cache.sh Performance tests
- test_concurrency.sh Thread safety test
- test_ttl.sh TTL expiration test
- final_validation.sh Complete validation
- CACHE_PERFORMANCE.md Detailed report
- CACHE_IMPLEMENTATION_SUMMARY.md Overview
- IMPLEMENTATION_COMPLETE.md Full summary
-
-Modified:
- internal/models/cv.go Added caching
- main.go Cache initialization
- internal/handlers/health.go Cache statistics
-```
-
-## Configuration
-```bash
-# Environment variable
-export CACHE_TTL_MINUTES=60 # Default: 60 minutes
-
-# Cached items
-- cv:en (English CV data)
-- cv:es (Spanish CV data)
-- ui:en (English UI strings)
-- ui:es (Spanish UI strings)
-```
-
-## Architecture
-```
-Request → LoadCV(lang)
- ↓
-Check Cache (RWMutex protected)
- ↓
-┌───┴────┐
-│ │
-Hit Miss
-<1µs Read disk + Parse JSON (~200µs)
-│ └─→ Store in cache
-│ │
-└────────────┘
- Return result
-```
-
-## Monitoring
-```bash
-# Health endpoint includes cache stats
-curl http://localhost:1999/health
-
-# Response:
-{
- "status": "ok",
- "version": "1.0.0",
- "cache": {
- "hits": 400,
- "misses": 4,
- "size": 4,
- "hit_rate_percent": 99.0
- }
-}
-```
-
-## What Was Changed
-
-### 1. Cache Package (NEW)
-`internal/cache/cv_cache.go`
-- Thread-safe cache with RWMutex
-- TTL-based expiration
-- Background cleanup
-- Statistics tracking
-
-### 2. Models (MODIFIED)
-`internal/models/cv.go`
-```go
-// Cache-first loading
-func LoadCV(lang string) (*CV, error) {
- // Check cache first
- if cached, found := cache.Get(key); found {
- return cached, nil
- }
- // Cache miss: load from disk
- cv := loadFromDisk()
- cache.Set(key, cv)
- return cv, nil
-}
-```
-
-### 3. Main (MODIFIED)
-`main.go`
-```go
-// Initialize cache on startup
-models.InitCache(1 * time.Hour)
-
-// Warm cache with default languages
-models.LoadCV("en")
-models.LoadCV("es")
-models.LoadUI("en")
-models.LoadUI("es")
-```
-
-## How It Works
-
-1. **Startup**: Cache initialized and warmed with en/es data
-2. **Request**: LoadCV/LoadUI checks cache first
-3. **Cache Hit** (99%): Return data from memory (<1µs)
-4. **Cache Miss** (1%): Read disk, parse JSON, store in cache (~200µs)
-5. **Expiration**: Background cleanup removes expired entries every 5 minutes
-6. **Monitoring**: Health endpoint reports cache statistics
-
-## Performance Comparison
-
-| Metric | Before | After | Improvement |
-|--------|--------|-------|-------------|
-| Disk reads | Every request | 1% of requests | 99% reduction |
-| Response time | ~10ms | 2.2ms | 4.5x faster |
-| Throughput | ~200/s | 1,308/s | 6.5x faster |
-| Memory | 0 | <1MB | Negligible |
-
-## Validation Evidence
-
-All tests passed with actual measurements:
-
-✅ **Performance**: 2.2ms avg response time (target: <5ms)
-✅ **Throughput**: 1,308 req/sec (target: 1000+)
-✅ **Cache Hit Rate**: 99% (target: >95%)
-✅ **Thread Safety**: 200 concurrent requests, 0 data races
-✅ **TTL Expiration**: Validated with 5-second test
-✅ **Memory**: ~400KB for 4 entries
-
-## Documentation
-
-- **CACHE_PERFORMANCE.md** - Detailed performance analysis
-- **CACHE_IMPLEMENTATION_SUMMARY.md** - Implementation overview
-- **IMPLEMENTATION_COMPLETE.md** - Complete summary
-- **QUICK_START_CACHE.md** - This file
-
-## Production Ready
-
-The implementation is production-ready with:
-- Thread-safe concurrent access
-- Configurable TTL via environment
-- Automatic cache warming
-- Health monitoring endpoint
-- Graceful error handling
-- Comprehensive test coverage
-- Zero external dependencies
-
----
-
-**Ready to deploy!** 🚀
diff --git a/SECURITY-FIXES.md b/SECURITY-FIXES.md
deleted file mode 100644
index 04581ea..0000000
--- a/SECURITY-FIXES.md
+++ /dev/null
@@ -1,341 +0,0 @@
-# Security Vulnerability Fixes
-
-## Critical Security Vulnerabilities Fixed - 2025-11-11
-
-### Overview
-Two CRITICAL security vulnerabilities have been identified and fixed in this CV website application:
-1. **Command Injection** vulnerability in git repository operations (CWE-78)
-2. **Cross-Site Scripting (XSS)** vulnerability via unsafe HTML rendering (CWE-79)
-
----
-
-## Vulnerability 1: Command Injection in Git Operations
-
-### Severity: CRITICAL (CVSS 9.8)
-**CWE-78: OS Command Injection**
-
-### Location
-- File: `internal/handlers/cv.go`
-- Function: `getGitRepoFirstCommitDate()`
-- Lines: 452-490 (original)
-
-### Vulnerability Description
-The `getGitRepoFirstCommitDate()` function executed git commands with user-controlled `repoPath` parameter from JSON data files without validation. An attacker could modify the JSON files to inject malicious paths, potentially leading to:
-- Remote Code Execution (RCE)
-- Path traversal attacks
-- Information disclosure
-- Denial of Service (command hanging)
-
-### Attack Vector Example
-```json
-{
- "gitRepoUrl": "../../../etc/passwd",
- "gitRepoUrl": "data; rm -rf /",
- "gitRepoUrl": "data | cat /etc/passwd"
-}
-```
-
-### Fix Implementation
-
-#### 1. Path Validation Function
-Added `validateRepoPath()` function that:
-- Validates paths are within the project directory (whitelist approach)
-- Resolves absolute paths to prevent traversal attacks
-- Verifies paths exist and are directories
-- Automatically finds project root via .git directory
-
-```go
-func validateRepoPath(path string) error {
- // Resolve to absolute path
- absPath, err := filepath.Abs(path)
- if err != nil {
- return fmt.Errorf("invalid path: %w", err)
- }
-
- // Get project root
- projectRoot, err := findProjectRoot()
- if err != nil {
- return fmt.Errorf("cannot determine project root: %w", err)
- }
-
- // Only allow paths within project
- if !strings.HasPrefix(absPath, projectRoot) {
- return fmt.Errorf("repository path outside project directory: %s", path)
- }
-
- // Verify path exists
- info, err := os.Stat(absPath)
- if err != nil {
- return fmt.Errorf("path does not exist: %w", err)
- }
- if !info.IsDir() {
- return fmt.Errorf("path is not a directory: %s", path)
- }
-
- return nil
-}
-```
-
-#### 2. Timeout Protection
-Added context timeout to prevent command hanging:
-```go
-ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-defer cancel()
-cmd := exec.CommandContext(ctx, "git", "-C", repoPath, "log", ...)
-```
-
-#### 3. Project Root Detection
-Added `findProjectRoot()` function that walks directory tree to find .git:
-```go
-func findProjectRoot() (string, error) {
- dir := cwd
- for {
- gitPath := filepath.Join(dir, ".git")
- if info, err := os.Stat(gitPath); err == nil && info.IsDir() {
- return dir, nil
- }
- parent := filepath.Dir(dir)
- if parent == dir {
- return cwd, nil
- }
- dir = parent
- }
-}
-```
-
-### Security Tests Added
-Created `internal/handlers/cv_security_test.go` with comprehensive tests:
-- Path traversal attack detection
-- Command injection attempt rejection
-- Timeout functionality
-- Valid path acceptance
-
-All tests pass:
-```bash
-go test -v ./internal/handlers -run "Security"
-# PASS: TestValidateRepoPath (all 8 test cases)
-# PASS: TestGetGitRepoFirstCommitDate_SecurityValidation (6 malicious paths blocked)
-# PASS: TestGetGitRepoFirstCommitDate_Timeout
-```
-
----
-
-## Vulnerability 2: Cross-Site Scripting (XSS) via safeHTML
-
-### Severity: CRITICAL (CVSS 9.6)
-**CWE-79: Cross-Site Scripting**
-
-### Location
-- File: `internal/templates/template.go`
-- Function: `safeHTML` template function
-- Lines: 50-52
-
-### Vulnerability Description
-The `safeHTML` template function bypassed Go's automatic HTML escaping, allowing raw HTML from JSON data to be rendered without sanitization. If JSON files were compromised, attackers could inject malicious JavaScript leading to:
-- Session hijacking
-- Cookie theft
-- Credential harvesting
-- Malicious redirects
-- Defacement
-
-### Attack Vector Example
-```json
-{
- "ShortDescription": "",
- "Responsibilities": ["
"]
-}
-```
-
-### Fix Implementation
-
-#### 1. Removed safeHTML Function
-Completely removed the `safeHTML` function from template.go:
-```go
-// BEFORE (VULNERABLE):
-"safeHTML": func(s string) template.HTML {
- return template.HTML(s) // ❌ NO SANITIZATION
-},
-
-// AFTER (SECURE):
-// Security: safeHTML function removed to prevent XSS attacks
-// Go's html/template package automatically escapes HTML by default
-```
-
-#### 2. Updated All Templates
-Removed all `safeHTML` usage from templates:
-
-**Before (VULNERABLE):**
-```html
-{{.ShortDescription | safeHTML}}
-{{. | safeHTML}}
-```
-
-**After (SECURE):**
-```html
-{{.ShortDescription}}
-{{.}}
-```
-
-Go's `html/template` package now automatically escapes all HTML entities:
-- ` # Script injection
-❌ # Event handler
-❌