LND v0.20 compatibility: internal LND gRPC protos and client calls were updated for LND 0.20.x (new required fields on getChanInfo and forwardingHistory). Operators should run LND 0.20.x with this release; running against LND 0.19.x may fail gRPC calls.
Lightning.Pub public API: no changes. proto/service (methods.proto, structs.proto) and proto/autogenerated/client.md are unchanged — no new or modified HTTP/Nostr RPC routes.
Configuration: no new or changed Lightning.Pub config or environment variables.
Migration: upgrade the backing LND node to 0.20.x, then deploy Lightning.Pub 0.0.31. No Lightning.Pub data migration or operator action beyond the LND upgrade. Patch dependency update: dotenv 17.4.1 → 17.4.2.