{"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-mw131k3m","versions":[{"created_at":"2026-06-10T22:52:30Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy81784771→quote23621627 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"51420b7244848a345e719f0ac1b9468fb0f2683539fb68648af0e7f88cbfd90b","version":20},{"created_at":"2026-06-10T13:34:21Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積106.2㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"adf6d1928d4dcf66070558783c039998c56f5aa5fe896ce746557a36b72327b0","version":7},{"created_at":"2026-06-10T12:48:21Z","element_count":85,"note":"5軸GA polish 58->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b70adc50c0b1094c6752513195715ccf32d1b4fbfcf4a5567d2bdad54ab57d3f","version":4}]}