Feature Request: versioned, co-edited, encrypted wiki texts

Chat is good for sharing a time-sensitive link, but as the chat continues, links get lost. If I could co author basic texts with other Keybase users in the context of a specific team, containing links, bold, italic, and other basic formatting (Markdown/Textile ??), I could ensure essential information for my team is permanently accessible, yet secure. It seems silly to keep everything secure in Keybase and then as soon as we need to co-author, put our ideas into Google Docs or have to mess about making a secure install of MediaWiki. Simple, co-editable texts would be encrypted for teams like other files, but would be rendered and displayed like wiki-text and able to link to each other, and link to other stored files. There is a real lack of good intranet software out there and a basic ability to co-author text files securely would be extremely useful, particularly to teams already using Keybase.

No files, tests, or entry points are named. Start by reviewing how Keybase currently handles team chat, stored files, and encryption; a complete result would need an agreed scope for co-editing, versioning, formatting, and links between secure texts and files.

Written by the indexing model from the issue text.