{"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-ploughlanehouse-v56fnc2d","versions":[{"created_at":"2026-06-10T22:53:23Z","element_count":62,"note":"legacy fix: jpy87379776→quote24047756 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6f41cba7aa2f9dc33426e1bbe65c2a3e82c9c49109d36d7c3a9c6dbd18189c34","version":10},{"created_at":"2026-06-10T16:55:13Z","element_count":84,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"9fd7951e65f466cff9a1edbdd0b3b22f01ad4bd1ef783be2f853118d37032f8e","version":2}]}