generated: '2026-07-19'
method: searched
source: https://docs.harmonic.gg/run-a-validator/setup
docs: https://docs.harmonic.gg
versioning:
  scheme: client-version-train
  clients:
  - name: Salsa (Agave fork)
    versions: ['3.x', '4.x']
    setup: https://docs.harmonic.gg/run-a-validator/setup/salsa
  - name: Samba (Firedancer fork)
    setup: https://docs.harmonic.gg/run-a-validator/setup/samba
  wire_contract: The gRPC/proto contract is stable and Jito-searcher-proto compatible; versioning is expressed through validator client releases, not a versioned wire API.
migration:
  policy_url: https://docs.harmonic.gg/run-a-validator/setup/salsa/migration
  description: Documented upgrade path for moving an existing Salsa 3.x deployment to 4.x.
failover:
  description: On builder failure the block engine fails over mid-slot to another builder running the same scheduling strategy; if none is reachable the validator falls back to its own in-client scheduler.
  ref: https://docs.harmonic.gg/concepts/streaming-mode
sla:
  published: false
status_page:
  published: false
  note: No public status page found (status.harmonic.gg does not resolve as of the probe date).
deprecation:
  policy_published: false
  note: Legacy auction.harmonic.gg DNS hostnames remain supported; docs state updated DNS records may be issued in a future release. No formal dated deprecation/sunset policy is published.