检索-决策-设计 (RDD)
定义
RDD (检索-决策-设计) 是一种将以下内容联系在一起的推理模式 检索 (fetching relevant specs, docs, or examples), 决策 (making choices aligned with specs or policies), and 设计 (producing outputs that satisfy requirements). 它是 often used in spec-driven development: behavior is guided by explicit specifications that are retrieved and enforced during generation.
工作原理
- Retrieval: Given the current task, retrieve relevant specification fragments, examples, or constraints (例如 from a vector store or structured specs).
- Decision: Use the retrieved context to decide next steps, allowed actions, or output format.
- **设计：**按照规范生成或执行；可选地针对规范验证输出。
这可以在代理循环中实现：检索规范 → 在上下文中使用规范推理 → 行动或生成 → validate → repeat. The diagram below shows the cycle: task triggers retrieve; retrieved spec feeds 决策; generate/act produces output; validate checks against the spec and can loop back to the task (例如 retry or refine).
应用场景
RDD is a fit when outputs must align with retrievable specs (compliance, policy, or documented requirements).
- Spec-driven agents that retrieve requirements and validate outputs
- Compliance and policy-aware generation (例如 legal, safety)
- Code or config generation aligned with documented specs
优缺点
| Pros | Cons |
|---|---|
| Outputs align with specs | Requires good spec coverage and 检索 |
| Reduces drift and ad-hoc behavior | Extra 检索 and validation cost |
| Fits regulated or safety-critical flows | Spec 设计 and maintenance overhead |
外部文档
- RAG paper (Lewis et al.) — Retrieval component used in RDD
- LangChain – Agents and tools — Orchestration patterns