{"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-7fppv74h","versions":[{"created_at":"2026-06-10T22:56:15Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote21259834 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4a4260956076c2197c7733f180f3e7b218820c4fb265c99793132b8d48605388","version":10},{"created_at":"2026-06-10T18:46:37Z","element_count":72,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"52f8bf20512b3c75e10e2fa66a9d01469cb187bde45ca5cdaabe9348de85fedc","version":3}]}