docs: create milestone v1.6 roadmap (3 phases, 30 requirements)
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- ✅ **v1.3 Proxy Pool** - Phase 10 (shipped 2026-03-18)
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- ✅ **v1.4 Zhihu Anti-Crawler** - Phase 11 (shipped 2026-03-18)
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- ✅ **v1.5 B站字幕简化处理** - Phase 12 (shipped 2026-03-21)
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- 🔄 **v1.6 语义分段改进** - Phases 13-15 (in progress)
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## Phases
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---
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## 🔄 v1.6 语义分段改进 (IN PROGRESS)
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**Milestone Goal:** 使用 LLM 实现智能语义分段,识别视频类型并适配分段策略,保持内容完整性
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### Phase 13: 核心 LLM 分段功能
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**Goal**: 实现基于 LLM 的智能语义分段,识别视频类型并生成主题标题
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**Depends on**: Phase 12
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**Requirements**: VIDEO-01, VIDEO-02, VIDEO-03, BOUND-01, BOUND-02, BOUND-03, BOUND-04, COMP-01, COMP-02, COMP-03, TITLE-01, TITLE-02, TITLE-03, SENT-01, SENT-02, SENT-03, STRAT-01, STRAT-02, STRAT-03
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**Success Criteria** (what must be TRUE):
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1. 系统能正确识别 B站视频的类型(知识类、故事类等),并根据类型选择分段策略
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2. 语义分段在主题切换处正确创建边界,不会混入不同话题的内容
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3. 分段不会在句子中间或论点未完成时截断,保持内容的语义完整性
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4. 主题/章节分段生成简洁准确的标题,论点/观点分段不加标题
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5. 不同类型视频使用对应的分段策略,策略可扩展
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**Plans**: TBD
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### Phase 14: 鲁棒性与成本控制
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**Goal**: 提高系统稳定性,实现优雅降级和成本优化
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**Depends on**: Phase 13
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**Requirements**: ROBUST-01, ROBUST-02, ROBUST-03, ROBUST-04, COST-01, COST-02, COST-03
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**Success Criteria** (what must be TRUE):
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1. LLM 调用失败时自动降级到简单规则分段,不影响整体流程
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2. LLM 响应解析失败时自动重试或降级,有日志记录便于诊断
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3. AI 不可用时自动使用简单规则分段,保证基本功能可用
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4. 长视频字幕自动分块处理,避免上下文窗口溢出
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5. 相同内容使用缓存结果,避免重复 LLM 调用
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**Plans**: TBD
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### Phase 15: 输出优化与兼容性
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**Goal**: 优化输出格式,确保向后兼容和可配置性
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**Depends on**: Phase 14
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**Requirements**: OUTPUT-01, OUTPUT-02, OUTPUT-03, CONFIG-01, CONFIG-02, CONFIG-03
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**Success Criteria** (what must be TRUE):
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1. 主题/章节分段输出带标题的 Markdown 结构,论点/观点分段输出纯文本
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2. 输出格式与现有 SRTProcessor 兼容,不影响其他平台处理
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3. LLM 分段功能可通过配置开关启用/禁用
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4. 向后兼容,禁用时使用简单规则分段,不破坏现有功能
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5. 知乎/文章平台继续使用 AnalyzeProcessor,不受影响
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**Plans**: TBD
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---
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## Progress
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**Execution Order:**
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Phases execute in numeric order: 1 → 2 → ... → 10 → 11 → 12
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Phases execute in numeric order: 1 → 2 → ... → 12 → 13 → 14 → 15
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| Phase | Milestone | Plans Complete | Status | Completed |
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|-------|-----------|----------------|--------|-----------|
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@@ -166,8 +209,38 @@ Phases execute in numeric order: 1 → 2 → ... → 10 → 11 → 12
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| 9. Pipeline 整合 | v1.2 | 1/1 | Complete | 2026-03-17 |
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| 10. Proxy Pool | v1.3 | 2/2 | Complete | 2026-03-18 |
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| 11. Stealth Fingerprinting | v1.4 | 2/2 | Complete | 2026-03-18 |
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| 12. SRT 简化处理器 | v1.5 | Complete | 2026-03-19 | 2026-03-19 |
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| 12. SRT 简化处理器 | v1.5 | 2/2 | Complete | 2026-03-21 |
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| 13. 核心 LLM 分段功能 | v1.6 | 0/0 | Not started | - |
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| 14. 鲁棒性与成本控制 | v1.6 | 0/0 | Not started | - |
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| 15. 输出优化与兼容性 | v1.6 | 0/0 | Not started | - |
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---
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*Last updated: 2026-03-19*
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## Context
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### 技术栈
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- Python 3.12+
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- Pydantic v2 (数据验证)
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- SimpleAIClient (LLM 调用)
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- 现有 SemanticSegmenter (扩展点)
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### v1.6 关键集成点
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- **SemanticSegmentationEngine**: 新模块,负责 LLM 调用和语义分析
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- **SRTProcessor**: 扩展现有处理器,添加 LLM 分支
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- **Pydantic Schemas**: 严格验证 LLM 输出格式
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### 三层 Fallback 策略
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1. 直接 JSON 解析(理想情况)
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2. Markdown 代码块提取(常见情况)
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3. 启发式均匀分段(保底方案)
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### 需要避免的陷阱
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- **LLM-1**: 上下文窗口溢出 — 实施分块策略
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- **LLM-2**: 输出格式不稳定 — 多层 fallback
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- **LLM-3**: 边界破坏完整性 — 句边界保护
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- **LLM-4**: 分段不一致性 — 温度控制
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- **LLM-5**: 成本失控 — 缓存策略
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---
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*Last updated: 2026-03-21*
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