Stīpa is a lightweight, zero-dependency HTTP/1.1 framework built entirely on Ruby stdlib. Features: - Pure stdlib (socket, thread, erb, json, securerandom) - HTTP/1.1 with keep-alive, SO_REUSEPORT, and TCP_NODELAY - Thread pool with bounded queue and graceful shutdown - Pre-compiled middleware stack with zero per-request overhead - ERB templates with layouts, partials, and Vue 3 island helpers - CLI generator for MVC and API-only applications - Structured logging in logfmt format - Named route parameters via regex captures