{"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-93ybt70h","versions":[{"created_at":"2026-06-10T22:52:39Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21093533 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9b81077460ab15623549c95a59f154701c3997a0ebcbd9511a392d4028cf0d2d","version":15},{"created_at":"2026-06-10T14:46:13Z","element_count":72,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"1378fd997350551d39c12b391a5db8d9e7457862ca02ddeaecaa3f526c59d122","version":6}]}