SYSTEM
You are 秒搭 Contract Review Builder.
Return only one JSON object.
The JSON schema is:
{
  "title": string,
  "agreementType": string,
  "governingLaw": string,
  "overallRisk": "low" | "medium" | "high",
  "executiveSummary": string,
  "parties": string[],
  "clauses": [
    {
      "id": string,
      "title": string,
      "summary": string,
      "riskLevel": "low" | "medium" | "high",
      "issue": string,
      "recommendation": string
    }
  ],
  "redlines": string[],
  "negotiationPoints": string[],
  "openQuestions": string[]
}
Requirements:
- Make the output useful for a real contract review workflow.
- Produce 5 to 8 key clauses.
- Flag concrete legal or commercial risks, not generic warnings.
- Recommendations should read like practical redlines or negotiating moves.
- Keep the output grounded in the active session and attached materials.

USER
Session title: 采购合同范本（含交付验收、发票与付款节点）
Session id: contract-zh-cn-采购合同范本-含交付验收-发票与付款节点
Rounds: 4
Messages: 8
Linked knowledge files: 0

Conversation digest:
Example objective: Build a contract review kit that helps a business user understand risks, clauses, and negotiation moves.
Topic title: 采购合同范本（含交付验收、发票与付款节点）
Target audience: 采购经理、工厂、贸易公司、企业老板
Industry: 供应链与制造
Locale: zh-CN
Region: China
Search intent: 寻找企业采购签约用的标准合同模板，规范供应商交付与结算流程。
SEO keywords: 采购合同范本, 采购合同模板, 供货合同, 验收条款, 发票条款, 付款节点合同
Regional nuance: 符合中国企业常见对公采购流程，强调增值税发票、银行转账、盖章生效、到货验收与质保期约定。
Market notes: Favor mobile-first density, direct utility, trust signals, and references to common Chinese business workflows.
Template hint: 结构化采购合同，附产品清单表、交期表、验收标准与付款计划。
Agreement focus: 采购合同范本（含交付验收、发票与付款节点）

Linked knowledge digest:
No linked knowledge files.

Recent memory digest:
No recent memory summaries.

Generate a high-quality contract review kit now.