{"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-willowbrookhouse-d059rmdw","versions":[{"created_at":"2026-06-10T22:53:56Z","element_count":85,"note":"legacy fix: jpy85444799→quote20821160 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d50050770986e6f33bd5bc9c2fcacc8410d2bdd1fd6bf5162d7aeff06b4bda57","version":10},{"created_at":"2026-06-10T17:23:21Z","element_count":72,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"e7f0a3b3e5ed11832438a8736420b53fd80bb8e854e9173d7f8df99fd2a19ee7","version":2}]}