Lagrange v0.2.6

Lagrange 0.2.6 — 2026-10-27 (experimental / alpha).

Consensus cutover to the Rust raft-rs core through the WASM operation
port, with full partition snapshot compaction and follower reconstruction,
replicated two-phase transaction decision and participant apply, fresh-identity
message-group membership replacement, cold retained-seed handoff, and
systematic deterministic replicated SQL admission (epic raft-rs-full-cutover):

• Every node boot reserves a durable, monotonic boot incarnation from one
  owner per data directory before any lifecycle side effect; legacy
  rejoin hints are a one-time migration source only, and bootIncarnation
  is a required option of the public bootstrap and join services.
• ReplicaStateMachine is the sole lifecycle owner per partition-replica
  and message-group row: every transition is an exact-generation
  conditional update, activation checks the exact transport handler inside
  the lifecycle lane and holds it through the durable ACTIVE write, and
  handler retirement is exact-identity only. Executor-created replicas are
  born STOPPED and activate through the same lane.
• Reaped node generations are terminal: liveness, endpoint refresh and
  delayed READY work from a superseded incarnation can no longer mutate a
  successor's rows; bootstrap-snapshot addressing only breaks the initial
  connection circularity and never out-ranks an authoritative NODES row.
• Automatic raft-rs partition snapshot creation, retention sweep, committed
  log compaction (_raft_rs_snapshot / _raft_rs_log), interrupted compaction
  retry across leadership changes, pending-log byte growth trigger, and
  follower snapshot catch-up reconstruction.
• Replicated transaction coordinator decision persistence, participant staging
  and deterministic apply (TX1), and fresh-identity message-group learner
  admission, caught-up promotion, replacement, and source removal (FreshMG).
• Cold retained-seed continuation and handoff across restarts, system-table
  client ingress refusal at both engine and partition boundaries, and
  deterministic replicated SQL write and schema-default admission across
  date/time, version, randomness, connection-state, and user-defined functions.
• One replica lifecycle owner per live node incarnation across join
  retries, with timers on the node's canonical time source.
• The vendored raft-rs WASM binding ships in the Docker image and the
  packaged runtime.

Removed

• Intentional public-API removal (alpha single-path mandate, owner decision
  2026-10-26). These exports of the package root (lagrange-server,
  src/public-api.js) were retired implementations with no production
  constructor; MessageRouter is the one transport and ReplicaHandler with
  ReplicaStateMachine is the one replica lifecycle path. No replacement
  export is provided:
  • Transport (from src/transport/index.js): WebSocketTransport, its
    ConnectionState, WebSocketTransportProvider, WS_PROVIDER_SUBSYSTEM,
    WS_PROVIDER_LOG_MSG, WS_PROVIDER_ERROR_MSG, TransportProvider,
    TransportRegistry, REGISTRY_SUBSYSTEM, REGISTRY_LOG_MSG,
    REGISTRY_ERROR_MSG, ConnectionPool, POOL_SUBSYSTEM,
    POOL_LOG_MSG, POOL_ERROR_MSG. MessageRouter,
    RouterConnectionState, RouterMessageType and RPCClient remain.
  • Replica lifecycle (from src/node/index.js): ReplicaLifecycleManager,
    LifecycleReplicaStatus, VALID_STATUS_TRANSITIONS,
    LifecycleMessageType, AckStatus.
• The unexported RouterMessageHandler module (a dead duplicate of the
  router's inbound dispatch, imported by no module).

---

Docker images (linux/amd64, distroless):

• docker.io/psvensson/lagrange:0.2.6 (Docker Hub)

Full history: CHANGELOG.md · process: RELEASE.md