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当需要对代码库进行多维度深度分析时使用。路由到具体维度的提取技能，或一键全量提取。scan 的自然后续步骤。
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| name | extract |
| description | 当需要对代码库进行多维度深度分析时使用。路由到具体维度的提取技能，或一键全量提取。scan 的自然后续步骤。 |
解析用户意图，分发到具体的维度提取技能。
`_map.md` 不存在时，必须先调用 scan 技能。extract 不负责 scan——它只路由到维度提取技能。| 命令 | 行为 |
|---|---|
extract --target <path> --project <name> | 全量提取（5 个维度） |
extract --target <path> --project <name> --dimension topology | 只提取拓扑 |
extract --target <path> --project <name> --dimension api | 只提取接口 |
extract --target <path> --project <name> --dimension data-model | 只提取数据模型 |
extract --target <path> --project <name> --dimension flows | 只提取业务流程 |
extract --target <path> --project <name> --dimension concepts | 只提取领域概念 |
extract --kb-data-root <path> | 指定数据根目录 |
| 反模式 | 正确做法 |
|---|---|
| "我直接调用 extract-topology，不需要 extract 路由" | 可以，但 extract 路由帮你处理 scan 前置检查和多维度并发编排 |
| "全量提取太慢了，先做两个维度" | 合理。用 --dimension 参数选择需要的维度，后续可以增量补充 |
{KB_DATA_ROOT}/raw/<project>/_map.md 不存在，先调用 scan 技能--dimension 参数决定调用哪些技能：
topology → extract-topologyapi → extract-apidata-model → extract-data-modelflows → extract-flowsconcepts → extract-concepts--kb-data-root 参数），或并发调用（如果 extract-agent 可用，或由 /kb 命令并行派发）