Hronaut is a source-available desktop browser workspace for coding agents on Windows, macOS and Linux. Keep named isolated workspaces, tabs and browser storage between sessions over local/loopback MCP. Manually pause agents and take over for sign-in or consequential actions. Not a hosted browser service. One 10-day trial from the first agent tool call, then $4/month or $24/year per named user, up to 3 active devices. Video is an illustrated overview with an earlier UI.