diff --git a/check/main.go b/cmd/check/main.go
similarity index 100%
rename from check/main.go
rename to cmd/check/main.go
diff --git a/sum/sum.go b/cmd/sum/main.go
similarity index 100%
rename from sum/sum.go
rename to cmd/sum/main.go
diff --git a/tag/tag.go b/cmd/tag/main.go
similarity index 100%
rename from tag/tag.go
rename to cmd/tag/main.go