# Large Scale Change

Large scale changes (LSCs) are systematic modifications that touch many files across your repository, typically for infrastructure improvements, refactoring, or technical debt cleanup.

When a PR is detected as a large scale change (currently triggered by a diff so large that the platform API returns an HTTP 406), PullApprove applies special review requirements instead of the normal scope-based matching.

These changes typically require review from more senior team members who can assess the overall impact and approach.

```toml
[large_scale_change]
reviewers = ["admin1", "admin2"]
require = 2
labels = ["large-change"]
```

**Properties:**
- `reviewers` (required) - List of users who can review large scale changes. Supports [aliases](./aliases.md).
- `require` - Number of approvals required (default: 1).
- `labels` - Labels to automatically apply when detected.

## Related Resources

- [Software Engineering at Google: Large-Scale Changes](https://abseil.io/resources/swe-book/html/ch22.html)