diff --git a/.gitignore b/.gitignore
index 0210746..bfe8f4f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@ Assets/AssetStoreTools*
 
 # Visual Studio cache directory
 .vs/
+.vscode/
 
 # Autogenerated VS/MD/Consulo solution and project files
 ExportedObj/
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..cd9ed41
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,8 @@
+# Changelog
+All notable changes to this package will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## [0.1.0-preview] - 2019-06-30
+ - Initial submission for package distribution
diff --git a/AddressableImporter.meta b/CHANGELOG.md.meta
similarity index 57%
rename from AddressableImporter.meta
rename to CHANGELOG.md.meta
index 7a2e6bf..5e67658 100644
--- a/AddressableImporter.meta
+++ b/CHANGELOG.md.meta
@@ -1,7 +1,6 @@
 fileFormatVersion: 2
-guid: 5a8cf161d701c784783c071aa7a9c506
-folderAsset: yes
-DefaultImporter:
+guid: e0291b694a2344f4abc085ebe276fefe
+TextScriptImporter:
   externalObjects: {}
   userData: 
   assetBundleName: 
diff --git a/Documentation~/AddressableImportSettings-Insepctor.png b/Documentation~/AddressableImportSettings-Insepctor.png
index 6aa1bfc..e115995 100644
Binary files a/Documentation~/AddressableImportSettings-Insepctor.png and b/Documentation~/AddressableImportSettings-Insepctor.png differ
diff --git a/Documentation~/AddressableImporter.md b/Documentation~/AddressableImporter.md
new file mode 100644
index 0000000..ab21940
--- /dev/null
+++ b/Documentation~/AddressableImporter.md
@@ -0,0 +1,30 @@
+# Addressable Importer Usage
+
+You should create a single AddressableImportSettings file located at `Assets/AddressableAssetsData/AddressableImportSettings.asset`. To create it, go to `Assets/AddressableAssetsData` folder, right click in your project window and choose `Create > Addressable Assets > Import Settings`.
+
+If no settings file exists, an empty one will be created when importing any new asset.
+
+Once the settings file selected, you can edit rules in the inspector window. Then click `File > Save Project` to apply the changes.
+
+![AddressableImportSettings Inspector](AddressableImportSettings-Insepctor.png)
+
+Create a rule
+- Path, the path pattern
+- Match type
+  - Wildcard, `*` matches any number of characters, `?` matches a single character
+  - Regex
+- Group name, leaves blank for the default group
+- Labels, the labels to add
+- Simplified, simplify address to filename without extension
+
+Rule Examples
+
+| Type     | Example             |
+|----------|---------------------|
+| Wildcard | Asset/Sprites/Icons |
+| Wildcard | Asset/Sprites/Level??/*.asset |
+| Regex    | ^Assets/Models/.*\\.fbx |
+
+Notices for moved or re-imported assets
+- The importer will not override existing labels.
+- The importer will only override address if it looks like a path (starts with `Assets/`). In another word, if you changed or simplified the address, then reimport or move it, the address remains no change.
diff --git a/AddressableImporter/Editor.meta b/Editor.meta
similarity index 77%
rename from AddressableImporter/Editor.meta
rename to Editor.meta
index 4966f23..966cfe1 100644
--- a/AddressableImporter/Editor.meta
+++ b/Editor.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 0ff6d86e77543ea499e83e52f9f0c827
+guid: 6eae96027cac7c44bb61b85b07167e29
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/AddressableImporter/Editor/AddressableImportRule.cs b/Editor/AddressableImportRule.cs
similarity index 100%
rename from AddressableImporter/Editor/AddressableImportRule.cs
rename to Editor/AddressableImportRule.cs
diff --git a/AddressableImporter/Editor/AddressableImportRule.cs.meta b/Editor/AddressableImportRule.cs.meta
similarity index 100%
rename from AddressableImporter/Editor/AddressableImportRule.cs.meta
rename to Editor/AddressableImportRule.cs.meta
diff --git a/AddressableImporter/Editor/AddressableImportSettings.cs b/Editor/AddressableImportSettings.cs
similarity index 100%
rename from AddressableImporter/Editor/AddressableImportSettings.cs
rename to Editor/AddressableImportSettings.cs
diff --git a/AddressableImporter/Editor/AddressableImportSettings.cs.meta b/Editor/AddressableImportSettings.cs.meta
similarity index 100%
rename from AddressableImporter/Editor/AddressableImportSettings.cs.meta
rename to Editor/AddressableImportSettings.cs.meta
diff --git a/AddressableImporter/Editor/AddressableImporter.cs b/Editor/AddressableImporter.cs
similarity index 100%
rename from AddressableImporter/Editor/AddressableImporter.cs
rename to Editor/AddressableImporter.cs
diff --git a/AddressableImporter/Editor/AddressableImporter.cs.meta b/Editor/AddressableImporter.cs.meta
similarity index 100%
rename from AddressableImporter/Editor/AddressableImporter.cs.meta
rename to Editor/AddressableImporter.cs.meta
diff --git a/Editor/Unity.AddressableImporter.Editor.asmdef b/Editor/Unity.AddressableImporter.Editor.asmdef
new file mode 100644
index 0000000..ac91906
--- /dev/null
+++ b/Editor/Unity.AddressableImporter.Editor.asmdef
@@ -0,0 +1,18 @@
+{
+    "name": "Unity.AddressableImporter.Editor",
+    "references": [
+        "Unity.Addressables",
+        "Unity.Addressables.Editor"
+    ],
+    "optionalUnityReferences": [],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": []
+}
\ No newline at end of file
diff --git a/Editor/Unity.AddressableImporter.Editor.asmdef.meta b/Editor/Unity.AddressableImporter.Editor.asmdef.meta
new file mode 100644
index 0000000..00c875a
--- /dev/null
+++ b/Editor/Unity.AddressableImporter.Editor.asmdef.meta
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 6256bdcb0aaf53446b7dd10403a9d748
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/LICENSE b/LICENSE.md
similarity index 100%
rename from LICENSE
rename to LICENSE.md
diff --git a/LICENSE.meta b/LICENSE.md.meta
similarity index 100%
rename from LICENSE.meta
rename to LICENSE.md.meta
diff --git a/README.md b/README.md
index 1744fd7..843fca0 100644
--- a/README.md
+++ b/README.md
@@ -3,33 +3,26 @@ A simple rule based addressable asset importer.
 
 The importer marks assets as addressable, by applying to files having a path matching the rule pattern.
 
-## Usage
+## Install package
 
-You should create a single AddressableImportSettings file located at `Assets/AddressableAssetsData/AddressableImportSettings.asset`. To create it, go to `Assets/AddressableAssetsData` folder, right click in your project window and choose `Create > Addressable Assets > Import Settings`.
+### Install as a git package
 
-If no settings file exists, an empty one will be created when importing any new asset.
+This is the recommended way to track update. Open Packages/manifest.json with your favorite text editor. Add the following line to the dependencies block.
 
-Once the settings file selected, you can edit rules in the inspector window. Then click `File > Save Project` to apply the changes.
+    {
+        "dependencies": {
+            "com.littlebigfun.addressable-importer": "https://github.com/favoyang/unity-addressable-importer.git"
+        }
+    }
 
-![AddressableImportSettings Insepctor](./Documentation~/AddressableImportSettings-Insepctor.png)
+### Install as an embbed package via submodule
 
-Create a rule
-- Path, the path pattern
-- Match type
-  - Wildcard, `*` matches any number of characters, `?` matches a single character
-  - Regex
-- Group name, leaves blank for the default group
-- Labels, the labels to add
-- Simplified, simplify address to filename without extension
+This way gives you more control if you want to modify the package based on your purpose. Fork the repo, and checkout to your Packages folder as submodule.
 
-Rule Examples
+    git submodule add https://github.com/[YOURNAME]/unity-addressable-importer.git Packages/unity-addressable-importer
+    git add -A
+    git ci -m "Imported unity-addressable-importer as embbed package"
 
-| Type     | Example             |
-|----------|---------------------|
-| Wildcard | Asset/Sprites/Icons |
-| Wildcard | Asset/Sprites/Level??/*.asset |
-| Regex    | ^Assets/Models/.*\\.fbx |
+## How to use
 
-Notices for moved or re-imported assets
-- The importer will not override existing labels.
-- The importer will only override address if it looks like a path (starts with `Assets/`). In another word, if you changed or simplified the address, then reimport or move it, the address remains no change.
+See [usage](./Documentation~/AddressableImporter.md)
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..81abaef
--- /dev/null
+++ b/package.json
@@ -0,0 +1,10 @@
+{
+  "name": "com.littlebigfun.addressable-importer",
+  "displayName": "Unity Addressable Importer",
+  "version": "0.1.0-preview",
+  "unity": "2018.3",
+  "description": "A simple rule based addressable asset importer.",
+  "dependencies": {
+    "com.unity.addressables": "1.1.4"
+  }
+}
\ No newline at end of file
diff --git a/package.json.meta b/package.json.meta
new file mode 100644
index 0000000..840876d
--- /dev/null
+++ b/package.json.meta
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 610ea59e9fa780a48a0cf98536261cb3
+PackageManifestImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: