Page properties, and folders as tables and boards

Properties under the title: Select and Multi-select with coloured options, Person (a workspace member, with their picture), Date with a calendar, Text, Link (an address or a page), Number and Checkbox. Anyone who can edit the page changes them in place; readers see the ones that are set.
A folder is the database: add a property once and every page in the folder has it. Members and admins add, rename and remove properties. Removing one never deletes a page's value.
Table and board views in the folder: a sticky header, resizable columns, filter, sort and group, and cells you edit in place. On the board, drag a card between columns to change its value. Members save up to 20 views per folder.
Only what you can open: views list just the pages you can read, and a linked page's title shows only to people who can open it.
For AI apps: set_folder_properties and list_folder_pages are new, set_page_properties and create_page take properties, and get_page returns them. See Properties and views.