What
- claude.ai (
claudeai-proxy) MCP connectors now remember, per server, whether aserver/discoverprobe already succeeded with the modern protocol, and skip re-probing for 24 hours. - These verdicts are persisted to a
mcp-discover-verdicts.jsonstate file (or, when a plugin filesystem sandbox is active, via a virtual state store), read and written through a serialized write chain. - A retention/cleanup sweep now also prunes this file periodically.
Why Caching the discovery result avoids re-probing the same MCP server's protocol support on every connection, while the periodic cleanup keeps the cache file from growing unbounded.
Feature flag
tengu_dreamy_sundae Not enough to sayNothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.
This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.280: on
These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.
Read once, for one account on one subscription tier, against v2.1.280. It isn't a statement about your account. What a flag value here can and cannot tell you
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this build
New in this build: tengu_dreamy_sundae