{"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-unw1c4od","versions":[{"created_at":"2026-06-15T06:20:56Z","element_count":83,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"fe79cd9fe42c1d909a3d8eec0fbbc3bc0a9c86ea4321b88606a5301065df6a3c","version":3},{"created_at":"2026-06-15T06:07:56Z","element_count":89,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"06bec6fca9ebb044eeb924c77e01ebff0d2e278145ed103679b2d151c492b066","version":2},{"created_at":"2026-06-15T06:07:56Z","element_count":89,"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}]}