{
  "step": 531,
  "title": "Integrated explanation and research checkpoint",
  "question": "Can the completed results be presented as one source-grounded explanation of how the chronological families fit together?",
  "inputs": {
    "completed_predecessors": "C482\u2013C530",
    "primary_source": "latest File52c",
    "deliverable": "readable synthesis plus reproducible50-step record"
  },
  "sources": [
    "Strategy v0.2",
    "C482\u2013C530; independent reviews"
  ],
  "opened_utc": "2026-09-27T22:58:58.464771+00:00",
  "predecessor_sha256": "683c7e362bb46b6cb132b423c01ef1c6e2eb9642a5eb981cdf6d01d32588fc0d"
}