- Implement Anthropic cache_control support for 50-70% cost reduction
- Add Google Context Caching API framework with TTL configuration
- Add provider-level caching configuration (enable_native_caching, cache_ttl, min_cacheable_tokens)
- Update dashboard UI with caching settings
- Update documentation with detailed caching guide and examples
- Mark system messages and conversation prefixes as cacheable automatically
- Test Python compilation and validate implementation