---
type: Section
title: Index Files
sources: [SPEC.md]
generated: true
verified: false
status: current
stale_after: 2026-12-31
---

# Index Files

An `index.md` file at the root of a bundle lists the concepts it contains. It provides a table of contents for humans and a machine‑readable list for tools.

## Example

```markdown
# Index

- [Concept A](@/concepts/a)
- [Concept B](@/concepts/b)
```

Index files should be kept in sync with the bundle's actual contents.