diff --git a/tools/tools.go b/tools/tools.go
new file mode 100644
index 0000000..157bbe7
--- /dev/null
+++ b/tools/tools.go
@@ -0,0 +1,17 @@
+//go:build tools
+// +build tools
+
+package tools
+
+// Manage tool dependencies via go.mod.
+//
+// https://github.com/golang/go/wiki/Modules#how-can-i-track-tool-dependencies-for-a-module
+// https://github.com/golang/go/issues/25922
+
+//nolint:all
+import (
+	_ "github.com/client9/misspell/cmd/misspell"
+	_ "github.com/golangci/golangci-lint/cmd/golangci-lint"
+	_ "golang.org/x/tools/cmd/goimports"
+	_ "mvdan.cc/gofumpt"
+)