{"name":"tengu_mcp_discovery_source","slug":"tengu-mcp-discovery-source","family":"flag","title":"Feature flags","noun":"feature flag","description":"Startup no longer dials cached HTTP or SSE MCP servers; they restore from cache and connect on first use.","description_source":"entry","described_by":{"version":"2.1.221","anchor":"mcp-servers-can-start-from-a-discovery-cache-and-connect-laz"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.308","builds":0,"mined_builds":149,"first_cited":{"version":"2.1.221","released_at":"2026-08-03 22:16:25","spans":1}},"aliases":[],"entries":[{"version":"2.1.268","anchor":"mcp-discovery-can-skip-cacheconnect-when-tools-are-already","heading":"MCP discovery can skip cache\/connect when tools are already known","line":"MCP server setup can now skip the discovery cache and connection entirely when a server's tools are already known","released_at":"2026-09-10 18:41:11","reason":"gate cited by this entry"},{"version":"2.1.221","anchor":"mcp-servers-can-start-from-a-discovery-cache-and-connect-laz","heading":"MCP servers can start from a discovery cache and connect lazily","line":"Startup no longer dials cached HTTP or SSE MCP servers; they restore from cache and connect on first use.","released_at":"2026-08-03 22:16:25","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.221","anchor":"mcp-servers-can-start-in-a-new-cached-state-instead-of-block","heading":"MCP servers can start in a new \"cached\" state instead of blocking on connect","line":"MCP servers with a saved cache now show tools instantly and only connect when you first use them.","released_at":"2026-08-03 22:16:25","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.221","anchor":"discovery-cache-misses-are-classified-in-telemetry","heading":"Discovery-cache misses are classified in telemetry","line":"MCP tool discovery now logs whether the cache was used, and servers with skills or channels deliberately skip it.","released_at":"2026-08-03 22:16:25","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":4,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"tengu_mcp_discovery_cache","slug":"tengu-mcp-discovery-cache","description":"The \/mcp view now counts cached servers separately so you can tell them from live connections."},{"name":"tengu_mcp_discovery_cache_enable","slug":"tengu-mcp-discovery-cache-enable","description":"Calling a tool on a disabled MCP server would tell you to re-enable it, but that path is off."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-mcp-discovery-source","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}