diff --git a/cmd/checker/main.go b/cmd/checker/main.go
index 1a58d873..1b1d4d7e 100644
--- a/cmd/checker/main.go
+++ b/cmd/checker/main.go
@@ -1,12 +1,9 @@
 package main
 
 import (
-	"bytes"
 	"context"
 	"flag"
 	"fmt"
-	"io/ioutil"
-	"net/http"
 	"net/url"
 	"os"
 	"path/filepath"
@@ -51,33 +48,9 @@ func main() {
 		return
 	}
 
-	if subcommand == "review" {
-		review(flag.Arg(1), flag.Arg(2))
-		return
-	}
-
 	panic("unknown subcommand")
 }
 
-func review(pr, run_id string) {
-	url := "https://github-ci.cdnjs.com/review"
-	var jsonStr = []byte(fmt.Sprintf(`{"pr":"%s", "run_id": "%s"}`, pr, run_id))
-	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonStr))
-	util.Check(err)
-	req.Header.Set("Content-Type", "application/json")
-
-	client := &http.Client{}
-	resp, err := client.Do(req)
-	util.Check(err)
-
-	defer resp.Body.Close()
-
-	fmt.Println("response Status:", resp.Status)
-	body, _ := ioutil.ReadAll(resp.Body)
-	fmt.Println("response Body:", string(body))
-
-}
-
 func showFiles(path string) {
 	ctx := util.ContextWithName(path)
 	pckg, readerr := packages.ReadPackageJSON(ctx, path)
@@ -216,18 +189,26 @@ func lintPackage(path string) {
 }
 
 func err(ctx context.Context, s string) {
-	util.Printf(ctx, "error: "+s)
+	if prefix, ok := ctx.Value("loggerPrefix").(string); ok {
+		fmt.Printf("::error file=%s,line=1,col=1::%s\n", prefix, s)
+	} else {
+		fmt.Printf("error: %s\n", s)
+	}
 	errCount += 1
 }
 
 func warn(ctx context.Context, s string) {
-	util.Printf(ctx, "warning: "+s)
+	if prefix, ok := ctx.Value("loggerPrefix").(string); ok {
+		fmt.Printf("::warning file=%s,line=1,col=1::%s\n", prefix, s)
+	} else {
+		fmt.Printf("warning: %s\n", s)
+	}
 }
 
 func shouldBeEmpty(name string) string {
-	return fmt.Sprintf("%s should be empty\n", name)
+	return fmt.Sprintf("%s should be empty", name)
 }
 
 func shouldNotBeEmpty(name string) string {
-	return fmt.Sprintf("%s should be specified\n", name)
+	return fmt.Sprintf("%s should be specified", name)
 }