{"name":"tengu_mcp_listing_prior_rejected","slug":"tengu-mcp-listing-prior-rejected","family":"flag","title":"Feature flags","noun":"feature flag","description":"Two telemetry events were allowlisted, one for rejected MCP tool listings and one comparing served model catalogs.","description_source":"entry","described_by":{"version":"2.1.259","anchor":"new-telemetry-events-for-mcp-listing-races-and-model-catalog"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.322","builds":0,"mined_builds":161,"first_cited":{"version":"2.1.259","released_at":"2026-09-02 21:21:42","spans":1}},"aliases":[],"entries":[{"version":"2.1.280","anchor":"mcp-listing-prior-rejected-telemetry-gains-a-priorsource-fie","heading":"MCP listing-prior-rejected telemetry gains a priorSource field","line":"MCP telemetry for rejected cached listings now records where the cached data came from","released_at":"2026-09-22 15:44:39","reason":"found in this entry's text"},{"version":"2.1.259","anchor":"new-telemetry-events-for-mcp-listing-races-and-model-catalog","heading":"New telemetry events for MCP listing races and model-catalog comparisons","line":"Two telemetry events were allowlisted, one for rejected MCP tool listings and one comparing served model catalogs.","released_at":"2026-09-02 21:21:42","reason":"named in this entry, found in this entry's text, gate cited by this entry"},{"version":"2.1.259","anchor":"mcp-connect-cachingrejecting-the-v1mcp-servers-discover","heading":"MCP connect: caching\/rejecting the \/v1\/mcp_servers discover projection","line":"MCP connections can cache a discovery projection to skip a round trip, discarding and re-probing it if the server rejects it.","released_at":"2026-09-02 21:21:42","reason":"named in this entry, found in this entry's text, gate cited by this entry"}],"entries_total":3,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"tengu_mcp_auto_background","slug":"tengu-mcp-auto-background","description":"Default `true`. When on, an MCP tool call still running after 120 seconds is moved into a background task so the conversation can continue, and Claude is notified when it finishes; when off, MCP calls are not moved to the background at all. IDE servers (`sse-ide`, `ws-ide`) and subagent calls are never moved, the 120-second move needs `CLAUDE_AUTO_BACKGROUND_TASKS` in non-interactive sessions (which otherwise can only move a call when a new message arrives), and `CLAUDE_CODE_MCP_AUTO_BACKGROUND_MS` replaces the delay and the flag."},{"name":"tengu_mcp_ccr_prefetch","slug":"tengu-mcp-ccr-prefetch","description":null},{"name":"tengu_mcp_cgroup","slug":"tengu-mcp-cgroup","description":"On Linux you can force MCP servers into their own memory cgroup with an environment variable."},{"name":"tengu_mcp_claudeai_eligibility_gate","slug":"tengu-mcp-claudeai-eligibility-gate","description":"Default `false`. When on, a claude.ai connector (`claudeai-proxy` MCP server) whose config has `eligible: false` is not connected and is reported as `needs-auth`."},{"name":"tengu_mcp_claudeai_proxy_401","slug":"tengu-mcp-claudeai-proxy-401","description":"MCP proxy 401 telemetry now sanitizes the error code before logging it"},{"name":"tengu_mcp_cli_command_executed","slug":"tengu-mcp-cli-command-executed","description":null},{"name":"tengu_mcp_connect_suspend_redial","slug":"tengu-mcp-connect-suspend-redial","description":"If an MCP server connection fails because the computer slept or its clock jumped, Claude Code says so and tries connecting again a limited number of times"},{"name":"tengu_mcp_connect_timeout_retry","slug":"tengu-mcp-connect-timeout-retry","description":"MCP connect timeouts now respect the global timeout and get retried instead of failing."},{"name":"tengu_mcp_degraded","slug":"tengu-mcp-degraded","description":"MCP events are forwarded for logging with identifying fields stripped, and skipped entirely if analytics are off."},{"name":"tengu_mcp_delete","slug":"tengu-mcp-delete","description":"MCP CLI commands now hash server names in telemetry instead of sending them raw."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-mcp-listing-prior-rejected","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}