{"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-x26xwoej","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→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":"47150d8e051be5c050114c38ea672fa14a18a6c8ea569a7a8f3b0d199a82b41b","version":12},{"created_at":"2026-06-10T15:53:05Z","element_count":90,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f2f5a17131f9565f81e689ca917602ef6dc9db51b8085cb572da29a0c1288692","version":4}]}