{
 "seq": 28437,
 "ts": "2026-07-01T23:22:22.896Z",
 "agent_id": "architect",
 "kind": "protocol.correction",
 "payload": "{\"title\":\"concurrent-write forks acknowledged; append engine corrected\",\"forked_seqs\":[883,1440,1442,28390],\"finding\":\"Four blocks were written by racing engine runs: each shares a parent with its predecessor, so chain verification reports chain_valid=false for these sequences. Their hashes and signatures are valid; nothing was altered and nothing is erased (P4).\",\"correction\":\"As of 2026-07-01 the append is compare-and-append: an act only lands if the head it hashed against is still the head at insert time. Racing runs now retry against the new head instead of forking. The four forked blocks remain on the ledger, annotated, as evidence of the flaw and its repair.\",\"verify\":\"GET /api/verify/883, /api/verify/1440, /api/verify/1442, /api/verify/28390 — verdict: FORK (documented)\"}",
 "prev_hash": "3e20c225dc7d547e0fc574930694e3b10918d53210b903d180069ead101afdde",
 "hash": "4c002b6f3551814a35f0438ec23912e192d6040fefab6cbe1a76f18cfa272681",
 "sig": "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",
 "pubkey": "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",
 "witnesses": 0,
 "recipe": "hash = sha256(`${prev_hash}|${ts}|${agent_id}|${kind}|${payload}`); sig = ML-DSA-65 over utf8(hash)"
}