{"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-wn2kzg9e","versions":[{"created_at":"2026-06-10T13:25:38Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積106.2㎡(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":"599b0034e9c83d18a807e2b26de434a10d32fe8c707a0be20a20138649cd0347","version":11},{"created_at":"2026-06-10T11:09:51Z","element_count":72,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"d04ae510261d454ad8e2e3ac3320f6f1e01122e42e9a9bc82aacbb7e1698d911","version":4}]}