diff --git a/README.md b/README.md
index df7db41..de3e868 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,5 @@ mod - Module support for Go/Go+
 [![GitHub release](https://img.shields.io/github/v/tag/goplus/mod.svg?label=release)](https://github.com/goplus/mod/releases)
 [![Coverage Status](https://codecov.io/gh/goplus/mod/branch/main/graph/badge.svg)](https://codecov.io/gh/goplus/mod)
 [![GoDoc](https://pkg.go.dev/badge/github.com/goplus/mod.svg)](https://pkg.go.dev/github.com/goplus/mod)
+
+This repository holds packages for writing tools that work directly with Go/Go+ module mechanics. That is, it is for direct manipulation of Go/Go+ modules themselves.