diff --git a/main.go b/main.go
index ec022f2..09ac685 100644
--- a/main.go
+++ b/main.go
@@ -32,11 +32,13 @@ func main() {
 		return
 	}
 
+	// reduce the set being run
 	rules := validate.RegisteredRules
 	if *flRun != "" {
 		rules = validate.FilterRules(rules, validate.SanitizeFilters(*flRun))
 	}
 
+	// Guess the commits we're working with
 	var commitrange string
 	if *flCommitRange != "" {
 		commitrange = *flCommitRange
@@ -51,11 +53,13 @@ func main() {
 		}
 	}
 
+	// collect the entries
 	c, err := git.Commits(commitrange)
 	if err != nil {
 		log.Fatal(err)
 	}
 
+	// run them and show results
 	results := validate.Results{}
 	for _, commit := range c {
 		fmt.Printf(" * %s %s ... ", commit["abbreviated_commit"], commit["subject"])
diff --git a/rules/dco/dco.go b/rules/dco/dco.go
index b0867ba..75184ed 100644
--- a/rules/dco/dco.go
+++ b/rules/dco/dco.go
@@ -13,14 +13,17 @@ func init() {
 }
 
 var (
+	// ValidDCO is the regexp for signed off DCO
 	ValidDCO = regexp.MustCompile(`^Signed-off-by: ([^<]+) <([^<>@]+@[^<>]+)>$`)
-	DcoRule  = validate.Rule{
+	// DcoRule is the rule being registered
+	DcoRule = validate.Rule{
 		Name:        "DCO",
 		Description: "makes sure the commits are signed",
 		Run:         ValidateDCO,
 	}
 )
 
+// ValidateDCO is the ValidateRule for a git commit
 func ValidateDCO(c git.CommitEntry) (vr validate.Result) {
 	vr.CommitEntry = c
 	if len(strings.Split(c["parent"], " ")) > 1 {