---
type: plan
node_id: plan:fix-diagnosis-tree-data-link-plan
title: "实现计划: 修复诊断 tree_data 断链 bug"
date: 2026-07-15
---

# 修复诊断 tree_data 断链 bug Implementation Plan

> **For agentic workers:** REQUIRED SUB-SKILL: Use subagent-driven-development to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.

**Goal:** 接通 TRM4→TRM5 迁移时断掉的诊断树加载环，让 `evaluate_span` 拿到真实 ground_truth、error_type 归因不再坍缩。

**Architecture:** app 层新增树展平器（递归遍历 tree.json 的嵌套 roots → 扁平 `{"nodes":{id:{card,level,time_range}}}`），在离线诊断（`video_split_cli`）与训练循环（`runner`）两个注入点按诊断涉及的 video 加载填充 `tree_data`；core 侧把 `run_diagnosis` 的静默回退改为缺失即 fail-loud。core 只消费 dict，不碰归因瀑布（算法保真 §4.7#7）。

**Tech Stack:** Python 3.11、pytest、loguru、asyncio；参考 TRM4 `core/harness/diagnose.py:1677` 的 tree_cache 语义。

---

## 设计来源
`research-wiki/designs/fix-diagnosis-tree-data-link.md`（已含 Codex 审查修订）。

## 文件结构映射

| 文件 | 动作 | 责任 |
|------|------|------|
| `app/harness/tree_nodes.py` | 新建 | 树展平器：`load_tree_nodes` + `load_tree_data_for_videos` |
| `core/evolution/diagnose.py` | 改 `:2144-2145` | 视频未覆盖即 raise（fail-loud，唯一 core 改动） |
| `app/harness/video_split_cli.py` | 改 `build_diagnosis_deps`(`:262-337`) + `_execute_real`(`:590-600`) | 离线注入：wrong_ids→video 加载填充 tree_data |
| `app/harness/runner.py` | 改 `_run_diagnosis`(`:2163-2187`) | 训练注入：question_ids→video 加载注入 |
| `tests/unit/test_tree_nodes.py` | 新建 | 展平器单测 |
| `tests/integration/test_baseline_diagnosis.py` | 改 `:99` | 更新传 `tree_data={}` 的用例为真实/伪造树 |
| `tests/integration/test_diagnosis_tree_link.py` | 新建 | ground_truth 接通 + 依赖方向 |

## 关键代码事实（Codex 已核验）
- 仅 `L1Node` 有 `to_dict`（`app/tree/index.py:260`）；L2/L3 为其内部闭包；输出无 `level`、L3 用 `timestamp` 无 `time_range` → **不走对象层，直接遍历 json**。
- node_id 累积式 `..._L1_000_L2_000_L3_000` → level **按遍历深度赋值**，不解析 node_id。
- `GeneratedQuestion.video_id: str`（`core/types.py:60`）；`load_questions_by_id(dir) -> dict[str, GeneratedQuestion]`（`video_split_cli.py:443`）。
- `run_diagnosis` else 分支已支持 `{video_id: {...}}` 形态（`diagnose.py:2068-2074`）。
- `diagnose.py:2145` 的 `td = ...get(vid,{})` 在 `:2148` try 之前 → 在此处 raise **不会**被 `:2159` 的 `except ValueError`（judge 降级）吞。
- store 根 = `Path("store")`，tree.json 在 `store/videos/<vid>/tree.json`（与 `factory.py:85` 一致）。

---

### Task 1: 树展平器 `app/harness/tree_nodes.py`

**Files:**
- Create: `app/harness/tree_nodes.py`
- Test: `tests/unit/test_tree_nodes.py`

- [ ] **Step 1: 写失败测试（正确性 + level + fail-loud）**

```python
# tests/unit/test_tree_nodes.py
"""树展平器单测：用真实 store/videos/0RxMZBLeqRI/tree.json 验证展平正确性与 fail-loud。"""
import json
from pathlib import Path

import pytest

from app.harness.tree_nodes import load_tree_data_for_videos, load_tree_nodes

_STORE = Path("store")
_VID = "0RxMZBLeqRI"  # 真实样本，111 节点


def _recursive_count(tree_json: dict) -> int:
    def walk(n: dict) -> int:
        return 1 + sum(walk(c) for c in (n.get("children") or []))
    return sum(walk(r) for r in tree_json["roots"])


def test_load_tree_nodes_flattens_all_nodes():
    result = load_tree_nodes(_STORE, _VID)
    assert set(result.keys()) == {"nodes"}
    nodes = result["nodes"]
    raw = json.loads((_STORE / "videos" / _VID / "tree.json").read_text(encoding="utf-8"))
    assert len(nodes) == _recursive_count(raw)
    sample = next(iter(nodes.values()))
    assert set(sample.keys()) == {"card", "level", "time_range"}
    assert isinstance(sample["card"], dict)


def test_level_assigned_by_depth_not_node_id():
    nodes = load_tree_nodes(_STORE, _VID)["nodes"]
    l1_id = f"{_VID}_L1_000"
    l3_id = f"{_VID}_L1_000_L2_000_L3_000"
    assert nodes[l1_id]["level"] == 1
    assert nodes[l3_id]["level"] == 3  # 若按 node_id 首个 _L\d_ 会误判成 1


def test_missing_tree_raises_file_not_found():
    with pytest.raises(FileNotFoundError):
        load_tree_nodes(_STORE, "__no_such_video__")


def test_empty_roots_raises_value_error(tmp_path):
    vdir = tmp_path / "videos" / "vX"
    vdir.mkdir(parents=True)
    (vdir / "tree.json").write_text(json.dumps({"metadata": {}, "roots": []}), encoding="utf-8")
    with pytest.raises(ValueError):
        load_tree_nodes(tmp_path, "vX")


def test_load_for_videos_dedups():
    data = load_tree_data_for_videos(_STORE, [_VID, _VID])
    assert set(data.keys()) == {_VID}
    assert data[_VID]["nodes"]
```

- [ ] **Step 2: 运行确认失败**

Run: `conda run -n Video-Tree-TRM pytest tests/unit/test_tree_nodes.py -q`
Expected: FAIL（`ModuleNotFoundError: No module named 'app.harness.tree_nodes'`）

- [ ] **Step 3: 实现展平器**

```python
# app/harness/tree_nodes.py
"""诊断侧树读取适配：把嵌套 tree.json 展平成诊断消费的扁平 nodes dict。

诊断编排（core/evolution/diagnose.py）期望 tree_data 形如
{"nodes": {node_id: {card, level, time_range}}}，但 TRM5 建树产物
store/videos/<vid>/tree.json 是嵌套 {"metadata","roots":[...]}。本模块递归展平，
接通 TRM4→TRM5 迁移时断掉的 ground_truth 加载环。

不走 TreeIndex 对象层：仅 L1Node 有 to_dict（app/tree/index.py:260），L2/L3 为其内部闭包，
且 to_dict 输出无 level、L3 用 timestamp 无 time_range。直接遍历 json 更省且零改建树模块。
"""

from __future__ import annotations

import json
from pathlib import Path
from typing import Any


def load_tree_nodes(store_dir: Path, video_id: str) -> dict[str, Any]:
    """加载单视频 tree.json 并展平成扁平 nodes dict。

    参数:
        store_dir: store 根目录（含 videos/<video_id>/tree.json）。
        video_id: 视频标识。

    返回:
        {"nodes": {node_id: {"card": dict, "level": int, "time_range": list}}}。

    异常:
        FileNotFoundError: tree.json 不存在（沿用 factory.py fail-loud 先例）。
        ValueError: 树无有效 roots、节点缺 id、或展平后 nodes 为空。

    关键实现:
        level 由遍历深度赋值（root=1/child=2/孙=3），不解析 node_id——node_id 累积式
        （..._L1_..._L2_..._L3_）用正则首匹配会把 L2/L3 误判成 1。
        L3 无 time_range，用 timestamp 合成 [t, t]。
    """
    tree_path = store_dir / "videos" / video_id / "tree.json"
    if not tree_path.exists():
        raise FileNotFoundError(f"树索引文件不存在: {tree_path}（诊断需真实树，P5 fail loud）")
    tree = json.loads(tree_path.read_text(encoding="utf-8"))
    roots = tree.get("roots")
    if not isinstance(roots, list) or not roots:
        raise ValueError(f"树无有效 roots: {tree_path}")

    nodes: dict[str, Any] = {}

    def _walk(node: dict[str, Any], level: int) -> None:
        node_id = node.get("id")
        if not isinstance(node_id, str) or not node_id:
            raise ValueError(f"节点缺 id: {tree_path}")
        time_range = node.get("time_range")
        if time_range is None:
            ts = node.get("timestamp")
            time_range = [ts, ts] if ts is not None else [0, 0]
        nodes[node_id] = {
            "card": node.get("card", {}),
            "level": level,
            "time_range": time_range,
        }
        for child in node.get("children", []) or []:
            _walk(child, level + 1)

    for root in roots:
        _walk(root, 1)

    if not nodes:
        raise ValueError(f"展平后 nodes 为空: {tree_path}")
    return {"nodes": nodes}


def load_tree_data_for_videos(store_dir: Path, video_ids: list[str]) -> dict[str, Any]:
    """按一组 video_id 去重加载展平树，供诊断按 video 注入。

    参数:
        store_dir: store 根目录。
        video_ids: 视频标识列表（可含重复，内部按首次出现顺序去重）。

    返回:
        {video_id: {"nodes": {...}}}。

    异常:
        同 load_tree_nodes（任一视频树缺失/无效即 fail-loud）。
    """
    return {vid: load_tree_nodes(store_dir, vid) for vid in dict.fromkeys(video_ids)}
```

- [ ] **Step 4: 运行确认通过**

Run: `conda run -n Video-Tree-TRM pytest tests/unit/test_tree_nodes.py -q`
Expected: PASS（5 passed）

- [ ] **Step 5: Commit**

```bash
git add app/harness/tree_nodes.py tests/unit/test_tree_nodes.py
git commit -m "feat: add tree.json flattener for diagnosis ground_truth"
```

---

### Task 2: core 视频覆盖 fail-loud（`diagnose.py`）

**Files:**
- Modify: `core/evolution/diagnose.py:2144-2145`
- Modify: `tests/integration/test_baseline_diagnosis.py:99`（更新受影响用例）

- [ ] **Step 1: 写失败测试（缺树 video → raise，不降级）**

在 `tests/integration/test_baseline_diagnosis.py` 追加：

```python
@pytest.mark.asyncio
async def test_run_diagnosis_raises_when_video_tree_missing():
    """诊断视频未被 tree_data 覆盖时 fail-loud（不静默回退、不走 judge 降级）。"""
    from core.evolution.diagnose import run_diagnosis

    q = _make_one_wrong_question(video_id="vMISS", question_id="vMISS-1")
    with pytest.raises(ValueError, match="诊断视频树未覆盖"):
        await run_diagnosis(
            run_id="infer_adhoc",
            questions=[q],
            tree_data={"vOTHER": {"nodes": {}}},  # 故意不含 vMISS
            llm=_FakeLLM(),
            run_log=_fake_run_log_with_one_wrong(q),
            skill_store=_FakeSkillStore(),
            prompts=_fake_diagnose_prompts(),
            concurrency=1,
            question_ids=["vMISS-1"],
        )
```

> helper（`_make_one_wrong_question` / `_fake_run_log_with_one_wrong` / `_FakeLLM` / `_FakeSkillStore` / `_fake_diagnose_prompts`）：复用该测试文件已有的伪造装配；若无 `_make_one_wrong_question`，构造 `GeneratedQuestion(question_id="vMISS-1", video_id="vMISS", task_type="Object Reasoning", ...)` 并让 run_log 返回一条 `correct=0` 且带非空 `steps_json`（含一个 `view_node` 步）的 prediction。

- [ ] **Step 2: 运行确认失败**

Run: `conda run -n Video-Tree-TRM pytest tests/integration/test_baseline_diagnosis.py::test_run_diagnosis_raises_when_video_tree_missing -q`
Expected: FAIL（当前静默回退 `{}`，不抛异常）

- [ ] **Step 3: 改 core 加 fail-loud**

`core/evolution/diagnose.py` 的 `_process_question`，把 `:2144-2145` 的：

```python
            vid = prediction.get("video_id", "")
            td = tree_data_by_video.get(vid, {})
```

改为（位置在 `:2148` 的 `try` 之前，故不被 `:2159` 的 `except ValueError` 吞）：

```python
            vid = prediction.get("video_id", "")
            if vid not in tree_data_by_video:
                # P5 fail-loud：诊断需真实树，调用方须为每个诊断视频加载 tree_data；
                # 静默回退空树会让 ground_truth 恒空、error_type 归因坍缩（本次修复的根因）。
                raise ValueError(
                    f"诊断视频树未覆盖: video_id={vid!r} 不在注入的 tree_data 中"
                    "（调用方须为每个诊断视频加载树，P5 fail loud）"
                )
            td = tree_data_by_video[vid]
```

- [ ] **Step 4: 更新既有传 `tree_data={}` 的三处用例**

`tests/integration/test_baseline_diagnosis.py` 有**三处** `tree_data={}`（`:99` / `:224` / `:311`，形参分别在 `:66` / `:197` / `:283`）。逐处判断：

- 若该用例**真诊断题**（`wrong_ids` 非空、进 `run_diagnosis`）→ 改为覆盖其诊断 video 的伪造树：
  ```python
          tree_data={"<该用例的 video_id>": {"nodes": {"<node_id>": {"card": {}, "level": 1, "time_range": [0, 0]}}}},
  ```
  （`video_id`/`node_id` 填该用例 prediction 实际用的值。）
- 若该用例期望**"无题诊断"早返回**（`wrong_ids=[]`，不进 `run_diagnosis`）→ `tree_data={}` 可保留，并在该用例加一行注释说明豁免原因。

逐处核对：读每个用例构造的 prediction 是否 `correct=0` 且被诊断——是则改树，否则注释豁免。

- [ ] **Step 4b: 全仓兜底扫描其它 `tree_data={}` 调用点**

Run: `conda run -n Video-Tree-TRM grep -rn "tree_data={}\|tree_data = {}" tests/ app/`
对每个命中判断：进 `run_diagnosis` 且诊断非空题的必须提供覆盖树；dry-run `fake_deps`（`video_split_cli.py` 内，`wrong_ids=[]` 早返回）豁免。确保 core fail-loud 不误伤既有用例。

- [ ] **Step 5: 运行确认通过**

Run: `conda run -n Video-Tree-TRM pytest tests/integration/test_baseline_diagnosis.py -q`
Expected: PASS

- [ ] **Step 6: Commit**

```bash
git add core/evolution/diagnose.py tests/integration/test_baseline_diagnosis.py
git commit -m "fix: fail loud when diagnosis video tree not covered (algo #7 input)"
```

---

### Task 3: 离线注入（`video_split_cli.py`）

**Files:**
- Modify: `app/harness/video_split_cli.py`（新增 `_DEFAULT_STORE_DIR` + `--store-dir` CLI、`_resolve_paths` 返回 store_dir、改 `build_diagnosis_deps` 签名与 tree_data、`_execute_real` 传 store_dir/video_ids、删模块顶层假注释 `:19-21`）
- Modify: `tests/unit/test_video_split_cli.py:269-273` 与 `:290-292`（两处旧调用补 `store_dir`/`video_ids`，否则改签名后先抛 TypeError 而非期望的 SystemExit）
- Test: `tests/unit/test_video_split_cli_tree_inject.py`（新建）

- [ ] **Step 1: 写失败测试（build_diagnosis_deps 填充真实树）**

```python
# tests/unit/test_video_split_cli_tree_inject.py
"""离线诊断注入：build_diagnosis_deps 按 video_ids 填充非空 tree_data。"""
from pathlib import Path
from unittest.mock import patch

from app.harness.video_split_cli import build_diagnosis_deps


def test_build_diagnosis_deps_loads_tree_for_videos():
    with patch("app.harness.video_split_cli._DiagLLMSettings") as S, \
         patch("adapters.llm.GovernedLLMClient"), \
         patch("adapters.telemetry.SQLiteTelemetryRecorder"), \
         patch("app.harness.video_split_cli._build_redis_cache", return_value=None):
        s = S.return_value
        s.search_llm_model = "deepseek-v4-pro"
        s.search_llm_base_url = "http://x"
        s.search_llm_api_key = "k"
        s.llm_circuit_breaker_threshold = 32
        s.llm_circuit_breaker_cooldown = 60
        s.llm_timeout = s.llm_ttft_timeout = s.llm_inter_token_timeout = 60
        s.llm_max_retries = 1
        s.llm_retry_base_delay = s.llm_retry_max_delay = 1
        deps = build_diagnosis_deps(
            harness_db=Path("workspaces/default/harness.db"),
            store_dir=Path("store"),
            video_ids=["0RxMZBLeqRI"],
            concurrency=1,
            expected_model="deepseek-v4-pro",
        )
    assert "0RxMZBLeqRI" in deps.tree_data
    assert deps.tree_data["0RxMZBLeqRI"]["nodes"]
```

> `GovernedLLMClient` / `SQLiteTelemetryRecorder` 在 `build_diagnosis_deps` 内是函数级 import，patch 其源模块（`adapters.llm` / `adapters.telemetry`）。测试目的仅验证 `deps.tree_data` 被真实树填充；若装配桩不足以走到 return，可进一步 patch `RunLogImpl`/`VersionedSkillStore`。

- [ ] **Step 2: 运行确认失败**

Run: `conda run -n Video-Tree-TRM pytest tests/unit/test_video_split_cli_tree_inject.py -q`
Expected: FAIL（当前 `build_diagnosis_deps` 无 `store_dir`/`video_ids` 参数 → `TypeError`）

- [ ] **Step 3: 加常量 + `--store-dir` + `_resolve_paths` + 删模块假注释 + 改签名 + 填 tree_data**

(a) `app/harness/video_split_cli.py` 路径常量区（`:65-67` 附近）新增：

```python
_DEFAULT_STORE_DIR = Path("store")  # tree.json 在 store/videos/<vid>/
```

(b) argparse（`:732` `--out-dir` 之后）新增：

```python
    parser.add_argument("--store-dir", type=Path, default=None, dest="store_dir")
```

(c) `_resolve_paths`（`:582-587`）改为返回 4 元组（含 store_dir）：

```python
def _resolve_paths(args: argparse.Namespace) -> tuple[Path, Path, Path, Path]:
    """解析 harness_db / questions_dir / out_dir / store_dir（CLI 覆盖默认工程路径）。"""
    harness_db = args.harness_db or _DEFAULT_HARNESS_DB
    questions_dir = args.questions_dir or _DEFAULT_QUESTIONS_DIR
    out_dir = args.out_dir or _DEFAULT_OUT_DIR
    store_dir = args.store_dir or _DEFAULT_STORE_DIR
    return harness_db, questions_dir, out_dir, store_dir
```

(d) 删模块顶层假注释：`app/harness/video_split_cli.py:19-21` 把 “+ tree_data={}（由诊断管线内部按需加载）” 改为 “+ tree_data 按 wrong_ids 涉及 video 预加载（store/videos/<vid>/tree.json 展平）”。

(e) `build_diagnosis_deps` 签名（`:262-264`）改为：

```python
def build_diagnosis_deps(
    *,
    harness_db: Path,
    store_dir: Path,
    video_ids: list[str],
    concurrency: int,
    expected_model: str,
) -> DiagnosisDeps:
```

函数末尾 `return DiagnosisDeps(...)`（`:330-337`）改为按 video 加载（并删 docstring 里"tree_data={} 由诊断管线内部按需加载"假注释）：

```python
    from app.harness.tree_nodes import load_tree_data_for_videos

    return DiagnosisDeps(
        run_log=RunLogImpl(str(harness_db)),
        llm=llm,
        skill_store=VersionedSkillStore(_diagnosis_skills_dir()),
        prompts=_load_diagnose_prompts(),
        tree_data=load_tree_data_for_videos(store_dir, video_ids),
        concurrency=concurrency,
    )
```

- [ ] **Step 4: `_execute_real` 解包 store_dir 并算 video_ids 传入**

`app/harness/video_split_cli.py:592`（解包改 4 元组）+ `:595-600`：

```python
    harness_db, questions_dir, out_dir, store_dir = _resolve_paths(args)
    if not harness_db.exists():
        raise SystemExit(f"harness.db 不存在: {harness_db}（P5 fail loud）")
    canonical_preds = load_canonical_predictions(harness_db, config.baseline_run_id)
    wrong_ids = select_diagnosable_wrong_ids(canonical_preds)
    questions = load_questions_by_id(questions_dir)
    video_ids = [questions[qid].video_id for qid in wrong_ids]
    deps = build_diagnosis_deps(
        harness_db=harness_db,
        store_dir=store_dir,
        video_ids=video_ids,
        concurrency=args.concurrency,
        expected_model=config.model,
    )
```

> 全仓其它 `_resolve_paths(args)` 解包处（如 dry-run `_execute_dry` 路径若有）同步改 4 元组解包，避免 `ValueError: too many values to unpack`。先 `grep -n "_resolve_paths(args)" app/harness/video_split_cli.py` 逐处核对。

- [ ] **Step 5: 更新受签名影响的既有单测**

`tests/unit/test_video_split_cli.py:269-273` 与 `:290-292` 两处 `cli.build_diagnosis_deps(...)` 调用补必填参数（这俩测试验的是**凭证/模型漂移 fail-loud（SystemExit）**，该校验在 tree_data 加载之前，故 `video_ids` 传空即可）：

```python
        cli.build_diagnosis_deps(
            harness_db=tmp_path / "h.db",
            store_dir=tmp_path,
            video_ids=[],
            concurrency=2,
            expected_model="deepseek-v4-pro",
        )
```

（两处调用都照此加 `store_dir=tmp_path, video_ids=[]`。）

- [ ] **Step 6: 运行确认通过 + 回归**

Run: `conda run -n Video-Tree-TRM pytest tests/unit/test_video_split_cli_tree_inject.py tests/unit/test_video_split_cli.py tests/unit/test_generate_questions.py -q`
Expected: PASS

- [ ] **Step 7: Commit**

```bash
git add app/harness/video_split_cli.py tests/unit/test_video_split_cli_tree_inject.py tests/unit/test_video_split_cli.py
git commit -m "fix: load real tree_data for offline diagnosis (video_split_cli)"
```

---

### Task 4: 训练注入（`runner._run_diagnosis`）

**Files:**
- Modify: `app/harness/runner.py:2163-2187`
- Test: `tests/unit/test_runner_diag_tree_inject.py`

- [ ] **Step 1: 写失败测试（_run_diagnosis 注入非空树）**

```python
# tests/unit/test_runner_diag_tree_inject.py
"""训练循环诊断注入：_run_diagnosis 按 batch question_ids 加载真实树注入 run_diagnosis。"""
from unittest.mock import AsyncMock, patch

import pytest


@pytest.mark.asyncio
async def test_run_diagnosis_injects_tree_data(runner_with_real_store):
    """question_ids 对应的 video 树被加载并作为 tree_data 传入 run_diagnosis。"""
    captured = {}

    async def _fake_run_diagnosis(**kwargs):
        captured["tree_data"] = kwargs["tree_data"]
        return _empty_diagnosis_result()

    with patch("core.evolution.diagnose.run_diagnosis", new=AsyncMock(side_effect=_fake_run_diagnosis)):
        await runner_with_real_store._run_diagnosis("infer_adhoc", question_ids=["604-2"])

    assert "0RxMZBLeqRI" in captured["tree_data"]  # 604-2 属于 0RxMZBLeqRI
    assert captured["tree_data"]["0RxMZBLeqRI"]["nodes"]
```

> `runner_with_real_store` fixture：构造 `self._config.store_dir="store"`、`self._paths.questions_dir` 指向含 604-2 的真实 benchmark 的 runner（复用该测试目录已有 runner helper；若无，最小构造使 `load_benchmark` 能取到 604-2）。`_empty_diagnosis_result()`：返回 `DiagnosisResult` 空壳（error_attributions=[]、infra=[]、degraded=[]）。`_run_diagnosis` 内 `run_diagnosis` 为函数级 import，patch 其源符号 `core.evolution.diagnose.run_diagnosis`。

- [ ] **Step 2: 运行确认失败**

Run: `conda run -n Video-Tree-TRM pytest tests/unit/test_runner_diag_tree_inject.py -q`
Expected: FAIL（当前 `tree_data={}` → captured 不含 `0RxMZBLeqRI`）

- [ ] **Step 3: 改 `_run_diagnosis` 注入树**

`app/harness/runner.py:2172-2187`，在 `questions = load_benchmark(...)` 后、`run_diagnosis(...)` 调用处：

```python
        questions = load_benchmark(self._paths.questions_dir)
        run_log = RunLogImpl(str(self._paths.db_path))
        skill_store = VersionedSkillStore(self._paths.skills_dir)
        diagnose_prompts = self._load_diagnose_prompts()

        from app.harness.tree_nodes import load_tree_data_for_videos

        if question_ids is not None:
            qid_set = set(question_ids)
            video_ids = [q.video_id for q in questions if q.question_id in qid_set]
        else:
            video_ids = [q.video_id for q in questions]
        tree_data = load_tree_data_for_videos(Path(self._config.store_dir), video_ids)

        return await run_diagnosis(
            run_id=run_id,
            questions=questions,
            tree_data=tree_data,
            llm=self._llm,
            run_log=run_log,
            skill_store=skill_store,
            prompts=diagnose_prompts,
            concurrency=self._config.concurrency,
            question_ids=question_ids,
        )
```

（删 `tree_data={},  # tree_data 由诊断管线内部按需加载` 假注释；确认文件顶部已 `from pathlib import Path`，否则补 import。）

- [ ] **Step 4: 运行确认通过**

Run: `conda run -n Video-Tree-TRM pytest tests/unit/test_runner_diag_tree_inject.py -q`
Expected: PASS

- [ ] **Step 5: Commit**

```bash
git add app/harness/runner.py tests/unit/test_runner_diag_tree_inject.py
git commit -m "fix: load real tree_data for training-loop diagnosis (runner)"
```

---

### Task 5: 集成验证 ground_truth 接通 + 依赖方向

**Files:**
- Create: `tests/integration/test_diagnosis_tree_link.py`

- [ ] **Step 1: 写 integration 测试（ground_truth 非空 + 依赖方向）**

```python
# tests/integration/test_diagnosis_tree_link.py
"""集成验证：真实树注入后 evaluate_span 收到非空 ground_truth；core 不依赖 app。"""
from pathlib import Path

from app.harness.tree_nodes import load_tree_nodes
from core.evolution.diagnose import _get_ground_truth_for_trace


def test_ground_truth_nonempty_with_real_tree():
    """对真实 T2 样本 604-2（video 0RxMZBLeqRI）的 view_node 调用，ground_truth 非空。"""
    td = load_tree_nodes(Path("store"), "0RxMZBLeqRI")
    node_id = "0RxMZBLeqRI_L1_000"  # 该视频真实存在的节点
    gt = _get_ground_truth_for_trace(td, "view_node", {"node_id": node_id})
    assert gt and gt != "{}"  # 拿到该节点 card 的 JSON，非空


def test_core_diagnose_does_not_import_app():
    """算法保真 + 依赖方向：core/evolution/diagnose.py 不 import app。"""
    src = Path("core/evolution/diagnose.py").read_text(encoding="utf-8")
    assert "import app." not in src
    assert "from app." not in src
```

- [ ] **Step 2: 运行确认通过**

Run: `conda run -n Video-Tree-TRM pytest tests/integration/test_diagnosis_tree_link.py -q`
Expected: PASS

- [ ] **Step 3: 全量回归**

Run: `conda run -n Video-Tree-TRM pytest tests/ -q`
Expected: PASS（无回归；诊断相关用例因 core fail-loud 需补树的已在 Task 2 Step 4 处理）

- [ ] **Step 4: Commit**

```bash
git add tests/integration/test_diagnosis_tree_link.py
git commit -m "test: integration for diagnosis tree_data link + core dep direction"
```

---

## 重跑与重冻衔接（代码计划外的运行步骤）

代码合入后 git short SHA 变 → `diag_fingerprint` 变 → 需全量重跑：

1. **重跑诊断 + 重冻切分**（一条命令走完两阶段）：
   `CUDA_VISIBLE_DEVICES=0 CONCURRENCY=12 bash scripts/build_video_split.sh`
2. **实测校验 tier**：重跑后查新 fingerprint 的 `baseline_diagnosis`，确认 `T2≈82 / T1≈152`（缓存命中预期）；偏差需归因（设计 §6：C3 异常吞并等非 tree_data 不稳定源）。
3. **观察 error_type 恢复多值**：确认 `error_type` 不再 100% extraction_failure、`evolution_target` 不再全 tool（软验收，充分性依赖 judge）。
4. **接受 pools.json 成员变化**：test/train 具体成员随多样性维恢复而变，floor/代表性 ε 约束仍保证 test 代表性合格（设计 §6，用户已确认重冻覆盖）。

## 算法保真校验（§4.7）

| 算法 | 是否涉及 | 结论 |
|------|---------|------|
| #7 诊断瀑布 | 是（仅接通输入） | **不改** `attribute_error`（`diagnose.py:910-941`）、severity 函数、defect/lapse 判定；Task 2 仅在 `_process_question` 加 fail-loud 输入护栏。参考 TRM4 `core/harness/diagnose.py:1677` tree_cache 语义对齐 ground_truth。 |
| #12 训练循环编排 | 是（仅换 tree_data 来源） | `runner._run_diagnosis` 只把 `tree_data={}` 换成真实加载，不改三级嵌套/慢更新/断点续训。 |
| 其余 11 项 | 否 | 不涉及。 |

## 验收标准
- 5 个 Task 全绿；`pytest tests/` 无回归。
- `evaluate_span`/`_get_ground_truth_for_trace` 在真实树下拿到非空 ground_truth（Task 5）。
- `core/evolution/diagnose.py` 不 import app（依赖方向）。
- 两**生产注入点**（离线 `build_diagnosis_deps` + 训练 `_run_diagnosis`）均加载真实树。允许保留 `tree_data={}` 的**豁免场景**：dry-run `fake_deps`（`wrong_ids=[]` 早返回）、以及测试里走"无题诊断早返回"路径的用例（须带注释说明）。Step 4b 的 grep 兜底确保无遗漏的会真正进 `run_diagnosis` 的空树调用。