diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 08cb851..913b562 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -22,14 +22,14 @@ make coverage   # generate HTML coverage report
 ### Project structure
 
 ```
-cmd/clipx/         CLI entry point (commands, LaunchAgent management)
-clipx/
-  clipboard.go     Clipboard abstraction (pbcopy/pbpaste)
-  config.go        Config file (~/.config/clipx/config.json)
-  net.go           Network utilities (DNS resolution, ping)
-  node.go          Core daemon (listener, clipboard watcher, peer sync)
-  protocol.go      Wire protocol (encode/decode messages & chunks)
-  *_test.go        Tests
+cmd/clipx/              CLI entry point (commands, LaunchAgent management)
+internal/clipx/
+  clipboard.go          Clipboard abstraction (pbcopy/pbpaste)
+  config.go             Config file (~/.config/clipx/config.json)
+  net.go                Network utilities (DNS resolution, ping)
+  node.go               Core daemon (listener, clipboard watcher, peer sync)
+  protocol.go           Wire protocol (encode/decode messages & chunks)
+  *_test.go             Tests
 ```
 
 ### Running locally
diff --git a/cmd/clipx/main.go b/cmd/clipx/main.go
index 2bb6823..a7b162f 100644
--- a/cmd/clipx/main.go
+++ b/cmd/clipx/main.go
@@ -13,7 +13,7 @@ import (
 	"text/template"
 	"time"
 
-	"github.com/gomantics/clipx/clipx"
+	"github.com/gomantics/clipx/internal/clipx"
 )
 
 var version = "dev"
diff --git a/clipx/clipboard.go b/internal/clipx/clipboard.go
similarity index 100%
rename from clipx/clipboard.go
rename to internal/clipx/clipboard.go
diff --git a/clipx/config.go b/internal/clipx/config.go
similarity index 100%
rename from clipx/config.go
rename to internal/clipx/config.go
diff --git a/clipx/config_test.go b/internal/clipx/config_test.go
similarity index 100%
rename from clipx/config_test.go
rename to internal/clipx/config_test.go
diff --git a/clipx/net.go b/internal/clipx/net.go
similarity index 100%
rename from clipx/net.go
rename to internal/clipx/net.go
diff --git a/clipx/node.go b/internal/clipx/node.go
similarity index 100%
rename from clipx/node.go
rename to internal/clipx/node.go
diff --git a/clipx/node_test.go b/internal/clipx/node_test.go
similarity index 100%
rename from clipx/node_test.go
rename to internal/clipx/node_test.go
diff --git a/clipx/protocol.go b/internal/clipx/protocol.go
similarity index 100%
rename from clipx/protocol.go
rename to internal/clipx/protocol.go
diff --git a/clipx/protocol_test.go b/internal/clipx/protocol_test.go
similarity index 100%
rename from clipx/protocol_test.go
rename to internal/clipx/protocol_test.go