Confidential by design
Client confidences stay on the computer.
Snippets and notes live in a database on the computer. There is no Nevisel account, no telemetry and no activation server, and expansion never touches the network. Notes can be locked with a secret phrase.
One approved wording
The partners approve it once.
On Windows, the shared library comes from your own Microsoft SQL Server. Only the editors it names can change it, and SQL Server itself records who changed each shared phrase, what it said afterwards, and when.
Notes by matter
Your thinking, linked.
Write in Markdown, connect notes with #tags and [[links]], and Atlas draws the map of a matter: what links to what, and what you have referenced but not yet written.