Respect Accept q-values + 406 handling and LLM UA rewrites for docs middleware

Respect Accept q-values + 406 handling and LLM UA rewrites for docs middleware targets a $1.20B = 100,000 developer-focused companies x $12,000 ACV (self-hosted + managed integrations + support) total addressable market with medium saturation and a year-over-year growth rate of 20%+ — driven by developer platform spend and AI/agent tooling adoption.

Key trends driving demand: LLM-driven automation -- more services and bots are crawling docs to answer user queries, increasing demand for machine-friendly doc formats and predictable content negotiation.; Edge-first deployment -- adoption of edge middleware platforms (Vercel, Cloudflare) makes low-latency routing and UA-based rewrites feasible and inexpensive.; Priority on standards -- teams are moving back toward RFC-compliant HTTP behavior for interoperability with SDKs, crawlers, and security scanners.; Consolidation of developer tooling -- developer portals, API platforms, and docs hosting are bundling more middleware features, creating demand for drop-in components..