{
 "issuer": "SigningLab",
 "protocol_addendum": "SL-SAMPLE-v1.1 + SL-OUTCOME-v1",
 "generation": "SL 2026.1",
 "created_utc": "2026-08-17T07:42:37+00:00",
 "supersedes_wording_of": [
  {
   "file": "commitments_sl2026_1.json",
   "sha256": "311dbed3747f30f7014dd15a9589f6365a2c8ae8cec0e146f55fc94d389411f8"
  },
  {
   "file": "keys_manifest_sl2026_1_batch001.json",
   "sha256": "4279d09dcda1704b42ee1820bcb3803bca546b580f10c75c3879848372b46ec0"
  }
 ],
 "note": "The committed hashes above are immutable and unchanged. This addendum only closes two protocol rules that earlier wording left ambiguous, per external audit review of 17 Aug 2026.",
 "cumulative_sampling_rule": {
  "universe": "deduplicated union of commitment hashes across ALL chained batches of this generation published before the announced cutoff",
  "score": "sha256(\"SL-SAMPLE-v1|\" + beacon_block_hash + \"|\" + commitment_hash)",
  "selection": "exactly K = min(100, N_total) smallest scores, hex ascending",
  "cumulative_manifest": "published before the beacon: every batch file, its SHA-256, per-batch and total counts, and the SHA-256 of the sorted union"
 },
 "outcome_commitment_rule": {
  "protocol": "SL-OUTCOME-v1",
  "leaf": "sha256(commitment_hash|outcome_class|evidence_hash|salt_outcome)",
  "tree": "leaves sorted ascending; parent = sha256(left|right); odd level: last node promoted unchanged",
  "order": [
   "1: season closes; outcomes computed for the FULL population",
   "2: Merkle root of all outcome leaves published on the verification page",
   "3: only then the public beacon is read",
   "4: each sampled entry is revealed with payload, verdict salt, outcome_class, evidence_hash, outcome salt and its Merkle inclusion proof"
  ],
  "reference_implementation": "scripts/_congela_desfechos_merkle.py (self-tested)"
 },
 "beacon": "first Bitcoin block with timestamp >= 2027-07-01T00:00:00Z that remains canonical at depth 144"
}