Luna is a Cloudflare Worker-based CDN for caching Bluesky user avatars and images. This page documents the service architecture, integration with apps like witchsky, and provides code examples for developers. Features: - Technical "how it works" documentation with 5-step process flow - DID resolution for both did:plc and did:web identifiers - 7-day cache TTL at 310+ Cloudflare edge locations - Integration examples and usage documentation - Build section with JavaScript/TypeScript code samples - Blue color scheme matching Bluesky branding Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>