Concept Graph

Triggers & routing

• Trigger: concept graph, prerequisite graph, dependency graph, 概念图, 先修关系.
• Use when: source-tutorial 的 C2，已有 output/TUTORIAL_SPEC.md，需要把教程概念转成可排序的 DAG。
• Skip if: 还没有 tutorial spec。
• Network: none.
• Guardrail: 只做结构，不写 reader-facing prose；图必须保持无环。

Materializes the tutorial spec's structured concept inventory into outline/concept_graph.yml.

Input

• output/TUTORIAL_SPEC.md

Output