{"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-stjohnsgrovehouse-asbdfh2x","versions":[{"created_at":"2026-06-19T14:50:27Z","element_count":89,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"53ebcafcdfe51da84624c92d8df564a3d08a6b51ae1987a447dde7ea2258e6c5","version":3},{"created_at":"2026-06-19T14:46:14Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"47407f33c3d895ea77ef20cc1c6eaf7c22b8239dc3c5b86039bfb0dafec0383e","version":2},{"created_at":"2026-06-19T14:46:13Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}