391 lines
15 KiB
Markdown
391 lines
15 KiB
Markdown
# LLM 错误码对齐（error_code）实施计划
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> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
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**Goal:** 在 engine 层暴露结构化 `error_code`（对齐 api-design §7），使调用方/UI 可依据错误码执行 retry/skip/abort/配置决策。
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**Architecture:** 单一事实源 = `LLMError.error_code` 类属性（五异常覆写）；`ChatResult`/`StructuredResult` 增加 `error_code` 字段透传；engine 失败路径取最后一次异常的同源 error_code；api-design §7 补 `LLM_NETWORK_ERROR` 行。
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**Tech Stack:** Python 3.11+、pytest（覆盖红线 fail_under=99）、dataclass
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## Global Constraints
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- 项目为中文交流：注释、docstring、commit 消息用中文；标识符英文
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- 零真实网络：单测一律注入 FakeLLMClient / MockTransport；`DEEPSEEK_API_KEY` 不落代码
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- 覆盖红线：`pyproject.toml` `fail_under = 99`（当前基线 119 passed / 100.00%），新增分支需足量测试
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- 全量回归：`python -m pytest -v`；聚焦：`python -m pytest tests/<file> -v`
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- 提交消息：`feat:` / `test:` / `docs:` + 简中文描述
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- 每次修改后追加 `_AI_USAGE_LOG.md`（范式步骤:"Agent 实现"/"测试验证"，模型:"deepseek-v4-flash-free"）
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- 本仓库工作在 master 分支（项目惯例）；Windows/PowerShell 环境
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- Spec: `docs/superpowers/specs/2026-08-09-llm-errorcode-alignment-design.md`
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---
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### Task 1: 异常树携带 error_code（exceptions.py）
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**Files:**
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- Modify: `src/genesis/inference/exceptions.py`
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- Test: `tests/test_inference_errors.py`
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**Interfaces:**
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- Consumes: 现有 `LLMError`/`LLMNetworkError`/`LLMTimeoutError`/`LLMNotConfiguredError`/`LLMResponseError`（已存在）
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- Produces: 每个异常类新增类属性 `error_code: str | None`——`LLMNetworkError.error_code == "LLM_NETWORK_ERROR"`、`LLMTimeoutError.error_code == "LLM_TIMEOUT"`、`LLMNotConfiguredError.error_code == "LLM_NOT_CONFIGURED"`、`LLMResponseError.error_code == "LLM_PARSE_ERROR"`、基类 `LLMError.error_code is None`
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- [ ] **Step 1: 写失败测试**
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在 `tests/test_inference_errors.py` 追加（import 上方 `LLMError` 已引入）：
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```python
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def test_error_code_class_attributes():
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# error_code 与 api-design §7 错误码表一一对应（机器可读事实源）
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assert LLMError.error_code is None
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assert LLMTimeoutError.error_code == "LLM_TIMEOUT"
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assert LLMNetworkError.error_code == "LLM_NETWORK_ERROR"
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assert LLMNotConfiguredError.error_code == "LLM_NOT_CONFIGURED"
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assert LLMResponseError.error_code == "LLM_PARSE_ERROR"
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def test_error_code_inherited_by_instance():
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e = LLMNetworkError("network")
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assert e.error_code == "LLM_NETWORK_ERROR"
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```
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- [ ] **Step 2: 运行验证失败**
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Run: `python -m pytest tests/test_inference_errors.py -v`
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Expected: FAIL（`AttributeError: type object 'LLMError' has no attribute 'error_code'`）
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- [ ] **Step 3: 实现**
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在 `src/genesis/inference/exceptions.py` 中为每个类加类属性：
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```python
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class LLMError(Exception):
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"""LLM 调用相关的异常基类（api-design §7 映射基底）"""
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error_code: str | None = None # api §7 错误码（机器可读）；新增子类必须覆写
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class LLMNetworkError(LLMError):
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"""网络失败 / 5xx 重试耗尽（可重试语义）"""
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error_code = "LLM_NETWORK_ERROR"
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class LLMTimeoutError(LLMError):
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"""LLM 调用超时（api-error: LLM_TIMEOUT 502）"""
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error_code = "LLM_TIMEOUT"
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class LLMNotConfiguredError(LLMError):
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"""Key / 模型缺失（api-error: LLM_NOT_CONFIGURED 503）"""
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error_code = "LLM_NOT_CONFIGURED"
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class LLMResponseError(LLMError):
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"""响应结构损坏（JSON 解析失败等）"""
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error_code = "LLM_PARSE_ERROR"
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```
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- [ ] **Step 4: 运行验证通过**
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Run: `python -m pytest tests/test_inference_errors.py -v`
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Expected: PASS（4 passed）
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- [ ] **Step 5: 追加 `_AI_USAGE_LOG.md`**
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范式步骤:"Agent 实现"，摘要：异常树 error_code 类属性（五类型 + 基类 None）。
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- [ ] **Step 6: 提交**
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```bash
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git add src/genesis/inference/exceptions.py tests/test_inference_errors.py _AI_USAGE_LOG.md
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git commit -m "feat: 异常树 error_code 类属性（对齐 api-design §7 错误码）"
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```
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---
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### Task 2: 结果对象 error_code 字段（types.py）
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**Files:**
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- Modify: `src/genesis/inference/types.py`
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- Test: `tests/test_inference_types.py`
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**Interfaces:**
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- Consumes: 现有 `ChatResult` / `StructuredResult` dataclass（Task 1 的 error_code 常量不直接依赖，但语义对应）
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- Produces: `ChatResult.error_code: str | None = None`；`StructuredResult.error_code: str | None = None`（均默认 None，向后兼容）
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- [ ] **Step 1: 写失败测试**
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在 `tests/test_inference_types.py` 追加：
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```python
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def test_chat_result_error_code_default_none():
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r = ChatResult(
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text="t", model="m", prompt_version="v1", usage=TokenUsage(),
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duration_ms=10, status="ok",
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)
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assert r.error_code is None
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def test_structured_result_error_code_default_none():
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r = StructuredResult(
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data={"a": 1}, raw_text='{"a":1}', parse_attempts=1, model="m",
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prompt_version="v1", usage=TokenUsage(), duration_ms=10, status="ok",
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)
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assert r.error_code is None
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```
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- [ ] **Step 2: 运行验证失败**
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Run: `python -m pytest tests/test_inference_types.py -v`
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Expected: FAIL（`TypeError: __init__() got an unexpected keyword argument 'error_code'` 或 AttributeError——取决于 dataclass 是否带默认；实际为 `AttributeError: 'ChatResult' object has no attribute 'error_code'`）
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- [ ] **Step 3: 实现**
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在 `src/genesis/inference/types.py` 两个 dataclass 的 `error` 字段后追加：
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```python
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@dataclass
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class ChatResult:
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"""chat() 的返回值"""
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text: str
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model: str
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prompt_version: str
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usage: TokenUsage
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duration_ms: int
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status: Literal["ok", "fallback", "failed"]
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error: str | None = None
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error_code: str | None = None # 失败时的 api §7 错误码；成功为 None
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@dataclass
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class StructuredResult:
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"""chat_structured() 的返回值（补丁 1：含 status 字段）"""
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data: dict
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raw_text: str
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parse_attempts: int
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model: str
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prompt_version: str
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usage: TokenUsage
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duration_ms: int
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status: Literal["ok", "fallback", "parse_error", "failed"]
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error: str | None = None
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error_code: str | None = None # 失败/parse_error 时的错误码；成功为 None
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```
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- [ ] **Step 4: 运行验证通过**
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Run: `python -m pytest tests/test_inference_types.py -v`
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Expected: PASS（8 passed）
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- [ ] **Step 5: 追加 `_AI_USAGE_LOG.md`**
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范式步骤:"Agent 实现"，摘要：ChatResult/StructuredResult 增加 error_code 字段（默认 None 向后兼容）。
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- [ ] **Step 6: 提交**
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```bash
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git add src/genesis/inference/types.py tests/test_inference_types.py _AI_USAGE_LOG.md
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git commit -m "feat: 结果对象 error_code 字段（默认 None 向后兼容）"
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```
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---
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### Task 3: engine 透传 error_code（同源语义）
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**Files:**
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- Modify: `src/genesis/inference/engine.py`
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- Test: `tests/test_inference_engine.py`
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**Interfaces:**
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- Consumes: Task 1 `LLMError.error_code`；Task 2 `ChatResult.error_code` / `StructuredResult.error_code`；现有 `FakeLLMClient`（`tests/inference_helpers.py`，脚本 `("ok"|"raise_timeout"|"raise_network"|"parse_fail", content)`）
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- Produces: `chat()` 失败路径 `ChatResult.error_code` 与 `error` 同源（取最后一次 LLMError）；`chat_structured()` 失败/parse_error 路径同源透传
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- [ ] **Step 1: 写失败测试**
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在 `tests/test_inference_engine.py` 的 `test_chat_all_failed_returns_failed` 附近追加（文件已 import `FakeLLMClient`/`InferenceEngine`/`Models`）：
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```python
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def test_chat_failed_error_code_timeout():
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# 主模型超时 + 备用也失败：error_code 与 error 同源（取最后一次异常）
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client = FakeLLMClient([("raise_timeout", ""), ("raise_timeout", "")])
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eng = InferenceEngine(client=client, models=Models())
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r = eng.chat(session_id="s1", prompt=Prompt(name="p", version="v1", template="t"), variables={})
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assert r.status == "failed"
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assert r.error_code == "LLM_TIMEOUT"
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def test_chat_failed_error_code_network_last():
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# 主模型超时（第一次）、备用网络失败（最后一次）→ error_code 取最后一次 = LLM_NETWORK_ERROR
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client = FakeLLMClient([("raise_timeout", ""), ("raise_network", "")])
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eng = InferenceEngine(client=client, models=Models())
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r = eng.chat(session_id="s1", prompt=Prompt(name="p", version="v1", template="t"), variables={})
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assert r.status == "failed"
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assert r.error_code == "LLM_NETWORK_ERROR"
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def test_chat_failed_error_code_not_configured():
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# 备用模型 Key 缺失（最后一次）→ LLM_NOT_CONFIGURED
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client = FakeLLMClient([("raise_network", ""), ("raise_timeout", "")])
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# 用自定义异常客户端模拟 NotConfigured
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class NotConfiguredClient:
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def __init__(self):
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self.calls = []
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def chat(self, *, model, messages, temperature, max_tokens):
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self.calls.append(model)
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from genesis.inference.exceptions import LLMNotConfiguredError
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raise LLMNotConfiguredError("no key")
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eng = InferenceEngine(client=NotConfiguredClient(), models=Models())
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r = eng.chat(session_id="s1", prompt=Prompt(name="p", version="v1", template="t"), variables={})
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assert r.status == "failed"
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assert r.error_code == "LLM_NOT_CONFIGURED"
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def test_chat_structured_parse_error_code():
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client = FakeLLMClient([("parse_fail", ""), ("parse_fail", "")])
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eng = InferenceEngine(client=client, models=Models())
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r = eng.chat_structured(
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session_id="s1", prompt=Prompt(name="p", version="v1", template="提取"),
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variables={}, schema={}, retry_count=1,
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)
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assert r.status == "parse_error"
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assert r.error_code == "LLM_PARSE_ERROR"
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def test_chat_structured_failed_error_code_network():
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client = FakeLLMClient([("raise_network", "")])
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eng = InferenceEngine(client=client, models=Models())
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r = eng.chat_structured(
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session_id="s1", prompt=Prompt(name="p", version="v1", template="提取"),
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variables={}, schema={},
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)
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assert r.status == "failed"
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assert r.error_code == "LLM_NETWORK_ERROR"
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```
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> 说明：`test_chat_failed_error_code_not_configured` 使用本地 NotConfiguredClient（FakeLLMClient 脚本不含该异常）；文件需已 import `Prompt`（`from genesis.inference.types import Prompt`——若 Task 2 前是 `ChatMessage, Prompt`，本计划沿用 `Prompt`）。
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- [ ] **Step 2: 运行验证失败**
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Run: `python -m pytest tests/test_inference_engine.py -v`
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Expected: FAIL（新增用例中 `r.error_code` 为 `None` 或 AttributeError——取决于 engine 是否已透传；当前 engine 未透传，断言 `== "LLM_TIMEOUT"` 失败）
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- [ ] **Step 3: 实现**
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在 `src/genesis/inference/engine.py`：
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`chat()` 的失败循环增加 error_code 记录（第 103 行附近）：
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```python
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start = time.monotonic()
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last_error: str | None = None
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last_error_code: str | None = None
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for idx, name in enumerate(self._model_names(model)):
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try:
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...
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except LLMError as exc:
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last_error = str(exc)
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last_error_code = exc.error_code # 同源：取最后一次失败异常
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```
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并更新失败返回值（第 119-124 行）：
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```python
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return ChatResult(
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text="", model=name,
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prompt_version=getattr(prompt, "version", "inline"),
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usage=TokenUsage(), duration_ms=int((time.monotonic() - start) * 1000),
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status="failed", error=last_error, error_code=last_error_code,
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)
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```
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`chat_structured()`：
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- 循环前 `last_error` 旁加 `last_error_code: str | None = None`
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- `except json.JSONDecodeError` 分支：`last_error_code = "LLM_PARSE_ERROR"`
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- `except LLMError as exc` 分支的返回值：`status="failed", error=str(exc), error_code=exc.error_code`
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- 循环后 parse_error 返回值：`status="parse_error", error=last_error, error_code=last_error_code`
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- [ ] **Step 4: 运行验证通过**
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Run: `python -m pytest tests/test_inference_engine.py -v`
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Expected: PASS（22 passed）
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- [ ] **Step 5: 追加 `_AI_USAGE_LOG.md`**
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范式步骤:"Agent 实现"，摘要：engine 失败/parse_error 路径透传 error_code（与 error 同源取最后一次异常）。
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- [ ] **Step 6: 提交**
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```bash
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git add src/genesis/inference/engine.py tests/test_inference_engine.py _AI_USAGE_LOG.md
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git commit -m "feat: engine 透传 error_code（与 error 同源取最后一次异常）"
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```
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---
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### Task 4: api-design §7 文档补丁
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**Files:**
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- Modify: `docs/api-design.md`（§7 错误码表）
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- Test: 无（纯文档；回归验证全量）
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**Interfaces:**
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- Consumes: Task 1 的 `LLM_NETWORK_ERROR` / `LLM_TIMEOUT` / `LLM_PARSE_ERROR` / `LLM_NOT_CONFIGURED` 错误码
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- Produces: api §7 表五条 LLM 错误码全齐，来源列与异常类型一一对应
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- [ ] **Step 1: 修改错误码表**
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在 `docs/api-design.md` §7 表格的 `LLM_TIMEOUT` 行后插入新行：
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```markdown
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| `LLM_TIMEOUT` | 502 | LLM 调用超时 | retry / skip / abort | exceptions.LLMTimeoutError |
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| `LLM_NETWORK_ERROR` | 502 | 网络失败/5xx 重试耗尽 | retry / skip / abort | exceptions.LLMNetworkError |
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```
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（保留既有 `LLM_NOT_CONFIGURED` / `LLM_PARSE_ERROR` 行不动；`INTERNAL_ERROR` 行保留为 API 层兜底，来源列无需改。）
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- [ ] **Step 2: 追加 `_AI_USAGE_LOG.md`**
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范式步骤:"Agent 实现"，摘要：api-design §7 补 LLM_NETWORK_ERROR 行（对齐异常树 error_code）。
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- [ ] **Step 3: 全量回归**
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Run: `python -m pytest -v`
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Expected: PASS（≥ 124 passed / 100.00% 覆盖，fail_under=99 达标）
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- [ ] **Step 4: 提交**
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```bash
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git add docs/api-design.md _AI_USAGE_LOG.md
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git commit -m "docs: api §7 补 LLM_NETWORK_ERROR 行（对齐异常树错误码）"
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```
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---
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## Self-Review
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**1. Spec 覆盖**：
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- §3.1 异常树 error_code → Task 1 ✓
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- §3.2 结果对象字段 → Task 2 ✓
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- §3.3 engine 同源透传 → Task 3（含「主模型超时+备用网络失败→取最后一次」测试）✓
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- §3.4 语义表 INTERNAL_ERROR 兜底 → 文档保留（Task 4 说明）✓
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- §3.5 api §7 补行 → Task 4 ✓
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- §4 测试策略 → Task 1（errors）/ Task 2（types）/ Task 3（engine 五用例）✓
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- §5 验收 1-6 → 各任务 Step 4 + Task 4 Step 3 全量回归 ✓
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**2. 占位符检查**：无 TBD/TODO；每步含完整代码与预期输出。✓
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**3. 类型一致性**：
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- `error_code` 字段名在 types.py / engine.py / 测试一致 ✓
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- `FakeLLMClient` 脚本状态（raise_timeout/raise_network/parse_fail）与既有 helper 一致 ✓
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- `Models()` 类（`primary`/`fallback`）在 engine 测试已定义，Task 3 直接复用 ✓
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- 错误码字符串常量（`LLM_TIMEOUT` 等）与 api §7 表格一致 ✓
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**4. 依赖顺序**：Task 1（异常常量）→ Task 2（types 字段，不依赖常量）→ Task 3（engine 透传，依赖 1+2）→ Task 4（文档）。✓
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## 提交消息汇总
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- Task 1: `feat: 异常树 error_code 类属性（对齐 api-design §7 错误码）`
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- Task 2: `feat: 结果对象 error_code 字段（默认 None 向后兼容）`
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- Task 3: `feat: engine 透传 error_code（与 error 同源取最后一次异常）`
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- Task 4: `docs: api §7 补 LLM_NETWORK_ERROR 行（对齐异常树错误码）` |