mark-chapterslisted

# Mark Chapters / 章节标记 ## When to use / 何时使用 Videos > 5 min where chapter navigation helps retention. 时长 > 5 分钟的视频，章节有助于留存。 ## Inputs / 输入 - `workspace/script/script.full.md` (H2 sections). - `workspace/timeline.json`. ## Output / 输出 - `workspace/youtube/chapters.txt` (one `mm:ss Title` per line, first line `0:00 Intro`). ## Steps / 步骤 1. Walk H2 headers; map each to its segment start time via timeline. 2. Enforce YouTube rules: first chapter at 0:00, minimum 3 chapters, each ≥ 10 s. 3. Emit `chapters.txt`. ## Examples / 示例 ``` 0:00 Intro 0:42 Why retrieval matters 2:31 How chunking works ``` ## Failure recovery / 失败回退 - If < 3 sections, generate auto chapters by even time splits and warn. - If a chapter < 10 s, merge into the next.