diff --git a/.gitignore b/.gitignore
index 36462d8..6829136 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,3 +38,7 @@ coverage/
 
 # Please memory
 .please/memory/tasklist.json
+
+# Reference repositories (local checkout only)
+ref/*
+!ref/README.md
diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 6ed6a7b..0000000
--- a/.gitmodules
+++ /dev/null
@@ -1,21 +0,0 @@
-[submodule "ref/serena"]
-	path = ref/serena
-	url = https://github.com/oraios/serena
-[submodule "ref/mcp-server-plugin"]
-	path = ref/mcp-server-plugin
-	url = https://github.com/JetBrains/mcp-server-plugin
-[submodule "ref/opencode"]
-	path = ref/opencode
-	url = https://github.com/sst/opencode.git
-[submodule "ref/multispy"]
-	path = ref/multispy
-	url = https://github.com/microsoft/multilspy.git
-[submodule "ref/oh-my-opencode"]
-	path = ref/oh-my-opencode
-	url = https://github.com/code-yeongyu/oh-my-opencode
-[submodule "ref/docs-please"]
-	path = ref/docs-please
-	url = https://github.com/pleaseai/docs.git
-[submodule "ref/context-engineering-kit"]
-	path = ref/context-engineering-kit
-	url = https://github.com/NeoLabHQ/context-engineering-kit
diff --git a/package.json b/package.json
index d81d581..238c85f 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,8 @@
     "build:npm": "bun run scripts/generate-packages.ts",
     "publish:npm": "bun run build:npm && for dir in npm/code-*; do (cd \"$dir\" && bun publish --access public --tolerate-republish); done && cd npm/code && bun publish --access public --tolerate-republish",
     "prepare": "husky",
-    "build:docs": "turbo run build --filter=@pleaseai/code-please-docs-site..."
+    "build:docs": "turbo run build --filter=@pleaseai/code-please-docs-site...",
+    "ref:clone": "git clone https://github.com/oraios/serena ref/serena && (cd ref/serena && git checkout 192510e1fa0bb171d5aaf094ab32496b2d7bae3f) && git clone https://github.com/JetBrains/mcp-server-plugin ref/mcp-server-plugin && (cd ref/mcp-server-plugin && git checkout b614766ebcfdd46d495a741799bc68df5d08644c) && git clone https://github.com/sst/opencode ref/opencode && (cd ref/opencode && git checkout be8116e2ea3aed66c9d63e0cac2af47bd3e91be5) && git clone https://github.com/microsoft/multilspy ref/multilspy && (cd ref/multilspy && git checkout ee0f6dcd1c0f4c5471d8078580343203b0c73fa7) && git clone https://github.com/code-yeongyu/oh-my-opencode ref/oh-my-opencode && (cd ref/oh-my-opencode && git checkout c37d41edb2f221dbda6a0a2254d782f1f6e3fbeb) && git clone https://github.com/pleaseai/docs ref/docs-please && (cd ref/docs-please && git checkout 119cf8284b493d1a07aeb09d8d559bfba8a19299) && git clone https://github.com/NeoLabHQ/context-engineering-kit ref/context-engineering-kit && (cd ref/context-engineering-kit && git checkout 49be11a06d5e2a8c31e924ef55a771d9229fbca2)"
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.12.0",
diff --git a/ref/README.md b/ref/README.md
index e69de29..d9e743d 100644
--- a/ref/README.md
+++ b/ref/README.md
@@ -0,0 +1,25 @@
+# Reference Repositories
+
+참조용 외부 저장소 목록. 이 디렉토리의 저장소들은 git에서 추적되지 않습니다.
+
+## Repositories
+
+| Name | Repository | Commit | Description |
+|------|------------|--------|-------------|
+| serena | https://github.com/oraios/serena | 192510e1fa0bb171d5aaf094ab32496b2d7bae3f | JetBrains IDE plugin for AI coding assistants |
+| mcp-server-plugin | https://github.com/JetBrains/mcp-server-plugin | b614766ebcfdd46d495a741799bc68df5d08644c | JetBrains MCP server plugin |
+| opencode | https://github.com/sst/opencode | be8116e2ea3aed66c9d63e0cac2af47bd3e91be5 | Terminal-based AI coding assistant |
+| multilspy | https://github.com/microsoft/multilspy | ee0f6dcd1c0f4c5471d8078580343203b0c73fa7 | Multi-language LSP client library |
+| oh-my-opencode | https://github.com/code-yeongyu/oh-my-opencode | c37d41edb2f221dbda6a0a2254d782f1f6e3fbeb | OpenCode configuration framework |
+| docs-please | https://github.com/pleaseai/docs | 119cf8284b493d1a07aeb09d8d559bfba8a19299 | Please AI documentation |
+| context-engineering-kit | https://github.com/NeoLabHQ/context-engineering-kit | 49be11a06d5e2a8c31e924ef55a771d9229fbca2 | Context engineering toolkit |
+
+## Usage
+
+```bash
+# Clone a repository
+git clone <repository-url> ref/<name>
+
+# Example
+git clone https://github.com/oraios/serena ref/serena
+```
diff --git a/ref/docs-please b/ref/docs-please
deleted file mode 160000
index 119cf82..0000000
--- a/ref/docs-please
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 119cf8284b493d1a07aeb09d8d559bfba8a19299
diff --git a/ref/mcp-server-plugin b/ref/mcp-server-plugin
deleted file mode 160000
index b614766..0000000
--- a/ref/mcp-server-plugin
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit b614766ebcfdd46d495a741799bc68df5d08644c
diff --git a/ref/multispy b/ref/multispy
deleted file mode 160000
index ee0f6dc..0000000
--- a/ref/multispy
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit ee0f6dcd1c0f4c5471d8078580343203b0c73fa7
diff --git a/ref/oh-my-opencode b/ref/oh-my-opencode
deleted file mode 160000
index c37d41e..0000000
--- a/ref/oh-my-opencode
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit c37d41edb2f221dbda6a0a2254d782f1f6e3fbeb
diff --git a/ref/opencode b/ref/opencode
deleted file mode 160000
index be8116e..0000000
--- a/ref/opencode
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit be8116e2ea3aed66c9d63e0cac2af47bd3e91be5
diff --git a/ref/serena b/ref/serena
deleted file mode 160000
index 192510e..0000000
--- a/ref/serena
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 192510e1fa0bb171d5aaf094ab32496b2d7bae3f