{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-millsedgehouse-w69jxbme","versions":[{"created_at":"2026-06-24T21:10:05Z","element_count":82,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"d1571a9890b37a0d57be212ed02ef23371fa48391c64f25f88112515c0f029da","version":3},{"created_at":"2026-06-24T20:58:16Z","element_count":119,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"cc3d594d78579bf01b4c1cf58332ee7628d28e296af679113a447f5d91908ec5","version":2},{"created_at":"2026-06-24T20:58:16Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}