docs: design for diagnosis tree_data broken-link fix (TRM4 regression)

research-wiki/index.md

@@ -1,8 +1,8 @@
 # Research Wiki 索引
 
-> 自动生成，更新时间：2026-07-15 15:42 UTC
+> 自动生成，更新时间：2026-07-16 01:31 UTC
 
-## design (33)
+## design (34)
 - [2026-07-06-core-agent-adapters-llm-design](designs/2026-07-06-core-agent-adapters-llm-design.md) `design:2026-07-06-core-agent-adapters-llm-design`
 - [2026-07-07-app-harness-design](designs/2026-07-07-app-harness-design.md) `design:2026-07-07-app-harness-design`
 - [2026-07-07-core-evolution-design](designs/2026-07-07-core-evolution-design.md) `design:2026-07-07-core-evolution-design`
@@ -21,6 +21,7 @@
 - [Spec-1 Agent 执行环境修复（解析容错+步级重试+摘要附实体）](designs/agent-runtime-fixes.md) `design:agent-runtime-fixes`
 - [Spec-2 建树批量并行入口](designs/batch-tree-build.md) `design:batch-tree-build`
 - [Spec-3 出题管线 v2（失败机理靶向+逐题质量门）](designs/question-gen-v2.md) `design:question-gen-v2`
+- [修复诊断 tree_data 断链 bug（TRM4→TRM5 迁移 regression）](designs/fix-diagnosis-tree-data-link.md) `design:fix-diagnosis-tree-data-link`
 - [出题模块迁移设计（question_gen）](designs/2026-07-07-question-gen-design.md) `design:2026-07-07-question-gen-design`
 - [出题管线 TaskTypeStrategy 拆分设计（Clean Architecture）](designs/2026-07-14-task-type-strategy-design.md) `design:2026-07-14-task-type-strategy-design`
 - [出题质量提升 Phase A — Grounded 单题质量（候选池 + VLM 视觉打分 selector + 单维反事实）](designs/2026-07-14-grounded-question-gen-phaseA-design.md) `design:2026-07-14-grounded-question-gen-phaseA-design`