{"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-0hvh10cb","versions":[{"created_at":"2026-06-10T22:55:00Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73729440→quote24278376 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9b05408f0fe1751e407fa1d21e3c0dd8746189614341fa2e2f71d2b7dd84a715","version":10},{"created_at":"2026-06-10T17:55:57Z","element_count":84,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d4a63b172f5599d98ce2a5dcafdd2165a04e84bdfed383df34b72f04227a3d17","version":3}]}