{"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-652ixt2l","versions":[{"created_at":"2026-06-10T22:52:39Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20018747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ce604fb82d5cac0e07d15abae06f0094e863999e728bb88cd6f347f912dc154c","version":15},{"created_at":"2026-06-10T14:45:56Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f704b1e77f5ccf033503d78cbf5e806a122b48d05dec7ba96bb733733ca3e638","version":6}]}