preprint

Use when the user points you at a Preprint workspace (a directory containing `preprint/tabs.md` and `<host>-tN.md` page files). Operate a real Chromium browser through markdown files. Read `preprint/tabs.md` to discover open tabs, read a tab's page file to see its current state, and append exactly one action under `<!-- preprint:actions -->` for the daemon to execute. Use `preprint open / close / status` for tab lifecycle. Do not call `agent-browser` directly while these files exist.