XDS

Plus-gated xDS ADS client (plus.enabled: true and a loaded Plus module). Lazy-loads Titanium.Xds when xds: is present.

Configure xds.server, optional xds.tls and xds.node, and optional server.reloadListeners (forced on for xDS). The client subscribes to CDS, EDS, SDS, RDS, LDS in that order, ACK/NACKs each response, validates translated config, and applies it atomically. Unsupported fields are NACKed with a field path; the last accepted snapshot keeps serving.

Supported-field table, NACK rules, listener reconciliation (drain, rollback), and migration notes: xDS documentation.