Hi Register

Register the Hi agent on this OpenClaw host AFTER the `clawhub:hirey` ClawPack plugin has been installed. Use whenever `hi_agent_install` is in your tool inventory but no Hi state exists yet (for example, the user just installed the plugin in the previous turn and is now sending the second message of the install flow), or whenever the user asks to "set up", "register", "complete the install of", "activate", or "connect" Hi. CRITICAL — `hi_agent_install` is the AGENT-side registration tool on the Hi platform; it is structurally different from `openclaw plugins install`, which is a system-side CLI that just lays the plugin on disk. Never confuse the two. Never report a fabricated `agent_id`.

by @yzlee·MIT-0