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title: "Hypothesis Tree Refinement (HTR)"
created: 2026-06-24
updated: 2026-06-24
type: concept
tags: ["autonomous-research", "agent", "tree-search", "knowledge-management"]
sources:
- "[[arbor-htr-2026]]"
---
# Hypothesis Tree Refinement (HTR)
HTR 是 Arbor 框架的核心方法:将自主科研的中间状态持久化为假设树,通过分支探索、执行反馈回写、洞察向上传播和 held-out 准入门控实现累积式科研进步。
## 树节点结构
n = ⟨h, ι, µ⟩
- **h (Hypothesis)**:可验证的改进主张,粒度随深度细化(根=方向,叶=具体干预)
- **ι (Insight)**:可复用的证据解读——非执行日志,紧致语义记忆
- **µ (Metadata)**:状态/分数/git ref
## 五步循环
```
Observe → Ideate → Select → Dispatch → Backpropagate
```
1. **Observe**:观察当前树状态(前沿、洞察、约束)
2. **Ideate**:在选定父节点下生成 k 个子假设
3. **Select**:选择最有前景的叶子调度执行
4. **Dispatch**:将叶子分配给隔离 Executor
5. **Backpropagate**:将执行结果(分数/洞察)写回节点,沿祖先路径向上抽象
## 三种角色合一
- **搜索前沿**:活跃/验证/剪枝方向的可视化
- **长期记忆**:成功+失败的复用证据
- **可审计记录**:每个产物变更可追溯到动机假设
## 参考
- [[arbor-htr-2026]]
- [[coordinator-executor-architecture]]
- [[autonomous-optimization-ao]]