{"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-house-3x6vpjdm","versions":[{"created_at":"2026-06-10T22:49:39Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote22578729 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e010601e067f12bfe51d05f19b11147650833292b3f34ec4f079c9e39c99f5d2","version":25},{"created_at":"2026-06-10T13:07:13Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積97.8㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"a2478581aff8dc92a75ae448d130ad79ff6ffe7eb66c35485b313da23e66360e","version":11},{"created_at":"2026-06-10T07:25:49Z","element_count":85,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"819c7c20c0ddca86034f39041e423846d8b459b468f36d3d2d96d57447fc12bb","version":2}]}