diff --git a/.merlin b/.merlin
new file mode 100644
index 0000000..2720f95
--- /dev/null
+++ b/.merlin
@@ -0,0 +1,16 @@
+S commons/**
+B commons/**
+S commons_core/**
+B commons_core/**
+S external/**
+B external/**
+S globals/**
+B globals/**
+S h_files-format/**
+B h_files-format/**
+S h_program-lang/**
+B h_program-lang/**
+S lang_c/**
+B lang_c/**
+S lang_cpp/**
+B lang_cpp/**
diff --git a/commons/.merlin b/commons/.merlin
new file mode 100644
index 0000000..2ba6169
--- /dev/null
+++ b/commons/.merlin
@@ -0,0 +1 @@
+REC
diff --git a/commons_core/.merlin b/commons_core/.merlin
new file mode 100644
index 0000000..2ba6169
--- /dev/null
+++ b/commons_core/.merlin
@@ -0,0 +1 @@
+REC
diff --git a/lang_cpp/.merlin b/lang_cpp/.merlin
new file mode 100644
index 0000000..2ba6169
--- /dev/null
+++ b/lang_cpp/.merlin
@@ -0,0 +1 @@
+REC
diff --git a/lang_cpp/parsing/.merlin b/lang_cpp/parsing/.merlin
new file mode 100644
index 0000000..2ba6169
--- /dev/null
+++ b/lang_cpp/parsing/.merlin
@@ -0,0 +1 @@
+REC