ruby_llm_mesh (AiAgentRouter) is a Ruby gem that routes AI intents across a native chimera_core mesh (Rust FFI), OpenAI, Anthropic, and local node runtimes with automatic circuit-breaking, fallback ladders, optional semantic caching, peer health monitoring, lightweight RAG helpers, and optional ActiveRecord hooks. Gem name uses underscores (ruby_llm_mesh) to match the GitHub repository and RubyGems listing at https://rubygems.org/gems/ruby_llm_mesh.