Agent loop, session management, tool execution, context compaction, hooks, and extensions.

Emits ActiveSupport::Notifications events for chat completions, embeddings, tool calls, and image generation. Works with any LLM provider. Subscribe to events for cost tracking, logging, analytics, or alerting.

Connect to MCP servers via stdio, SSE, and Streamable HTTP transports. Run as an MCP server exposing any Ruby object as a tool. Discover tools, resources, and prompts. OAuth 2.1 authentication.

Isolated code execution via Local (subprocess + rlimits), Docker (containers), Daytona (remote sandboxes), and Cloudflare (Workers sandbox). Zero external runtime dependencies.