HermOS – a local-first AI agent IDE HermOS, a local-first AI agent IDE, introduces subagent tree orchestration that decomposes complex tasks and forks background subagents for parallel missions, such as investigating schemas while another writes unit tests, with support for MCP tool integration and a headless browser for live DOM testing. Subagent tree orchestration for parallel missions When tackling complex refactors or multi-file features, HermOS decomposes the problem and forks background subagents. One agent investigates schemas while another writes unit tests and verifies fixes. Subagent Trees Independent forks MCP Tool integration Headless Browser Live DOM testing