What
Managed settings are settings an organisation can set for Claude Code. Claude Code checks them against a schema, a description of which keys are allowed and what they may contain.
Before, it built the full schema for every possible key. It now builds the schema only for the keys a settings document actually contains, and keeps it for reuse. It also has a new safety check: if a document holds a key the saved schema was not built for, it reports "This settings schema was built for a document without this key".
Why
This is probably meant to make startup faster, with the new message guarding against a schema being reused for the wrong document.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear whether the new message can ever appear to a user.