{"name":"tengu_sdk_mcp_manifests","slug":"tengu-sdk-mcp-manifests","family":"flag","title":"Feature flags","noun":"feature flag","description":"SDK-registered in-process MCP servers can now skip a round-trip handshake at session start","description_source":"entry","described_by":{"version":"2.1.265","anchor":"sdk-mcp-servers-can-now-skip-the-control-channel-handshake-v"},"presence":{"first_seen":"2.1.265","removed_in":null,"in_current_build":true,"newest_mined":"2.1.322","builds":53,"mined_builds":161,"first_cited":null},"aliases":[],"entries":[{"version":"2.1.288","anchor":"sdk-mcp-manifests-writer-check-refactored-and-a-remote-cowor","heading":"Remote session owner-only check reworked, with a remote cowork case added","line":"The check for whether a remote session is limited to the owner's account is now shared, and a separate check for remote cowork sessions was added","released_at":"2026-10-02 18:30:40","reason":"gate cited by this entry"},{"version":"2.1.286","anchor":"sdk-mcp-manifests-remote-sessions-gated-by-tengu-ccr-sdk-mc","heading":"Remote sessions need extra conditions to use SDK MCP server manifests","line":"Remote sessions use SDK MCP manifests only when owner-only and a separate server switch, off by default, allows it","released_at":"2026-09-30 17:14:38","reason":"gate cited by this entry"},{"version":"2.1.265","anchor":"sdk-mcp-servers-can-now-skip-the-control-channel-handshake-v","heading":"SDK MCP servers can now skip the control-channel handshake via manifests","line":"SDK-registered in-process MCP servers can now skip a round-trip handshake at session start","released_at":"2026-09-08 19:05:16","reason":"gate cited by this entry"}],"entries_total":3,"docs":[],"docs_total":0,"gates":[{"version":"2.1.288","state":"on-in-code","account":true,"baseline":true,"code_default":true},{"version":"2.1.286","state":"on-in-code","account":true,"baseline":true,"code_default":true},{"version":"2.1.265","state":"unknown","account":null,"baseline":null,"code_default":true}],"related":[{"name":"tengu_sdk_malformed_input","slug":"tengu-sdk-malformed-input","description":"Odd or damaged input frames on remote connections are now fixed up or quietly dropped instead of erroring out."},{"name":"tengu_sdk_memory_summary","slug":"tengu-sdk-memory-summary","description":"SDK memory usage sampling for child processes now runs asynchronously and in parallel"},{"name":"tengu_sdk_oauth_refresh_unfulfilled","slug":"tengu-sdk-oauth-refresh-unfulfilled","description":"An SDK host can now refuse to refresh your login token and say why."},{"name":"tengu_sdk_result","slug":"tengu-sdk-result","description":"SDK session-result telemetry now includes the user message id being processed at session end."},{"name":"tengu_sdk_session_crash","slug":"tengu-sdk-session-crash","description":"SDK session crash telemetry now logs the actual error that caused the crash"},{"name":"tengu_sdk_workspace_trust","slug":"tengu-sdk-workspace-trust","description":"SDK\/host initialize can now grant directory trust programmatically via a validated workspaceTrust option"}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-sdk-mcp-manifests","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}