# PolyLLM — original product brief (CLAUDE.md provided by the owner, 2026-09-08)

The full brief was supplied in the build session; its normative rules are reproduced in the repository `CLAUDE.md` and `docs/UI-BRIEF.md`. Key sections: research-before-implementation, live model catalog, adapter architecture, mandatory email verification, encrypted BYOK keys, unified streaming events, capability-driven configuration, Arena, usage/cost tracking, security/privacy/logging rules, cluster deployment through ngrok at https://www.polyllm.io, real-API test matrix, final audit.