---
title: fan-in
description: Rank files by how many other files import them (import hubs).
search:
  tags: ["recipe"]
---

High fan-in means changes ripple through many consumers — protect with tests before refactoring.

```bash
codemap query --json --recipe fan-in
codemap hotspots --json   # outcome alias → same recipe
```

No params. The `dependencies` table aggregates static imports, dynamic imports, and resolved module-graph edges.

:::note
`hotspots` / `fan-in` rank **import hubs**. Change-frequency × complexity is a different recipe: `churn-complexity-hotspots`.
:::

Inspect SQL: `codemap query --print-sql fan-in`. Full catalog: `codemap query --recipes-json`. Related: `codemap impact <file>` for a single target’s dependents.