{"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-9qoqn8f0","versions":[{"created_at":"2026-06-13T14:20:25Z","element_count":83,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"12e3ce6eab39a321e0d5c4de22de3850c1738a047e5abc148d06268dc9456ea9","version":3},{"created_at":"2026-06-13T14:13:20Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3cb0b2b338688f85a3341abb9d0a9bfe51abeb9793a27f53449e1823e502b592","version":2},{"created_at":"2026-06-13T14:13:19Z","element_count":88,"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}]}