Directory scoped workspaces, cross-harness and model delegation, inter-agent and machine mesh for messaging and coordination, brw - Claude chrome beating cross harness chrome control (can work remotely too,good for nomads!), mcp multiplexing (and batched code execution with dynamic context saving tool search), approvals, secret helper, skills registry (with context preserving dynamic loading).

Rough edges on the ui, daily driven for 6mo.