chat-submit

Automatically route approved plans and durable/parallel execution work from normal chat into Invoker. Trigger when the user has a plan ready to run, asks to submit/run/execute via Invoker, wants durable parallel agent work, multi-layer or multi-PR work that should not stay in this chat, or says "submit to invoker" / "run this on invoker" without using a slash command. Prefer this over inventing local multi-agent…