{"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-b7x08rbz","versions":[{"created_at":"2026-06-23T06:08:26Z","element_count":85,"note":"5軸GA polish 49->98 by M5 (autonomous)","saved_by":"mcp","sha256":"5e7bb897ca0eecfe51902d7c8cd75cd39a7fa8f487c87808e3dc5547fa8e6dfa","version":3},{"created_at":"2026-06-23T06:03:06Z","element_count":138,"note":"loop3: 設計時延床 120.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6925c5940a444b6b02f9ece1e426eb4e208cbef104c3ee978f0354edc60c3f96","version":2},{"created_at":"2026-06-23T06:03:06Z","element_count":138,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}