diff --git a/.mage/magefile.go b/.mage/magefile.go
index a5a38fb9..00f4c622 100644
--- a/.mage/magefile.go
+++ b/.mage/magefile.go
@@ -12,7 +12,7 @@ import (
 	"go.einride.tech/mage-tools/targets/mgmarkdownfmt"
 
 	// mage:import
-	"go.einride.tech/mage-tools/targets/mgcocogitto"
+	"go.einride.tech/mage-tools/targets/mgconvco"
 
 	// mage:import
 	"go.einride.tech/mage-tools/targets/mggo"
@@ -38,7 +38,7 @@ func init() {
 
 func All() {
 	mg.Deps(
-		mgcocogitto.CogCheck,
+		mg.F(mgconvco.ConvcoCheck, "origin/main..HEAD"),
 		mggolangcilint.GolangciLint,
 		mggoreview.Goreview,
 		mgmarkdownfmt.FormatMarkdown,
diff --git a/Makefile b/Makefile
index 9a786bee..4540765f 100644
--- a/Makefile
+++ b/Makefile
@@ -8,9 +8,12 @@ include .mage/tools.mk
 all: $(mage)
 	@$(mage) all
 
-.PHONY: cog-check
-cog-check: $(mage)
-	@$(mage) cogCheck
+.PHONY: convco-check
+convco-check: $(mage)
+ifndef rev
+	$(error missing argument rev="...")
+endif
+	@$(mage) convcoCheck $(rev)
 
 .PHONY: format-markdown
 format-markdown: $(mage)
diff --git a/mglog/logger.go b/mglog/logger.go
index db2faf92..d6a8265f 100644
--- a/mglog/logger.go
+++ b/mglog/logger.go
@@ -4,15 +4,25 @@ import (
 	"fmt"
 
 	"github.com/go-logr/logr"
+	"github.com/go-logr/logr/funcr"
 )
 
 // Logger returns a standard logger.
 func Logger(name string) logr.Logger {
-	return logr.New(&sink{}).WithName(name)
+	return logr.New(&sink{
+		name: name,
+		formatter: funcr.NewFormatter(funcr.Options{
+			RenderBuiltinsHook: func(kvList []interface{}) []interface{} {
+				// Don't render builtins.
+				return nil
+			},
+		}),
+	})
 }
 
 type sink struct {
-	name string
+	formatter funcr.Formatter
+	name      string
 }
 
 func (s *sink) Init(info logr.RuntimeInfo) {
@@ -23,19 +33,13 @@ func (s *sink) Enabled(level int) bool {
 }
 
 func (s *sink) Info(level int, msg string, keysAndValues ...interface{}) {
-	if len(keysAndValues) > 0 {
-		fmt.Printf("[%s] %s (%v)\n", s.name, msg, keysAndValues)
-	} else {
-		fmt.Printf("[%s] %s\n", s.name, msg)
-	}
+	_, args := s.formatter.FormatInfo(level, msg, keysAndValues)
+	fmt.Printf("[%s] %s%s\n", s.name, msg, args)
 }
 
 func (s *sink) Error(err error, msg string, keysAndValues ...interface{}) {
-	if len(keysAndValues) > 0 {
-		fmt.Printf("[%s - ERROR] %s (%v)\n", s.name, msg, keysAndValues)
-	} else {
-		fmt.Printf("[%s - ERROR] %s\n", s.name, msg)
-	}
+	_, args := s.formatter.FormatError(err, msg, keysAndValues)
+	fmt.Printf("[%s | ERROR] %s%s\n", s.name, msg, args)
 }
 
 func (s *sink) WithValues(keysAndValues ...interface{}) logr.LogSink {