diff --git a/.gitmodules b/.gitmodules
index 0582607..13637d8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -22,3 +22,7 @@
 	path = examples/keyword/cpplint/sillycode
 	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
 	branch = keyword/cpplint/sillycode
+[submodule "examples/keyword/clang-tidy/sillycode"]
+	path = examples/keyword/clang-tidy/sillycode
+	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
+	branch = keyword/clang-tidy/sillycode
diff --git a/README.md b/README.md
index 3997d51..5a27e7a 100644
--- a/README.md
+++ b/README.md
@@ -46,27 +46,32 @@ go test -coverprofile cover.out -v ./...
 ?       focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/pkg/healthcheck   [no test files]
         focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/executors/dummy          coverage: 0.0% of statements
         focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/cpplint          coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/executors/sandbox                coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/dummy            coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/stage            coverage: 0.0% of statements
         focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/diff             coverage: 0.0% of statements
+        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/stage            coverage: 0.0% of statements
         focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/pkg/dummy         coverage: 0.0% of statements
+        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/keyword          coverage: 0.0% of statements
+        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/dummy            coverage: 0.0% of statements
+        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/executors/sandbox                coverage: 0.0% of statements
         focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/resultstatus             coverage: 0.0% of statements
 === RUN   TestMain
-=== RUN   TestMain/compile/success
 === RUN   TestMain/compile/error
-=== RUN   TestMain/dummy/success
-=== RUN   TestMain/dummy/error
+=== RUN   TestMain/compile/success
 === RUN   TestMain/cpplint/sillycode
---- PASS: TestMain (0.42s)
-    --- PASS: TestMain/compile/success (0.28s)
-    --- PASS: TestMain/compile/error (0.01s)
-    --- PASS: TestMain/dummy/success (0.01s)
+=== RUN   TestMain/dummy/error
+=== RUN   TestMain/dummy/success
+=== RUN   TestMain/keyword/clang-tidy/sillycode
+=== RUN   TestMain/keyword/cpplint/sillycode
+--- PASS: TestMain (2.28s)
+    --- PASS: TestMain/compile/error (0.03s)
+    --- PASS: TestMain/compile/success (0.42s)
+    --- PASS: TestMain/cpplint/sillycode (0.14s)
     --- PASS: TestMain/dummy/error (0.01s)
-    --- PASS: TestMain/cpplint/sillycode (0.11s)
+    --- PASS: TestMain/dummy/success (0.01s)
+    --- PASS: TestMain/keyword/clang-tidy/sillycode (1.57s)
+    --- PASS: TestMain/keyword/cpplint/sillycode (0.11s)
 PASS
-coverage: 72.4% of statements
-ok      focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/cmd/joj3  0.425s  coverage: 72.4% of statements
+coverage: 74.0% of statements
+ok      focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/cmd/joj3  2.290s  coverage: 74.0% of statements
 ```
 
 ### For developers
diff --git a/examples/keyword/clang-tidy/sillycode b/examples/keyword/clang-tidy/sillycode
new file mode 160000
index 0000000..51160e0
--- /dev/null
+++ b/examples/keyword/clang-tidy/sillycode
@@ -0,0 +1 @@
+Subproject commit 51160e0a0cb01159fa264435865185083d756b06