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+# Plugin Packaging 
+
+Snap supports the ACI (App Container
+Image) format defined in the 
+[App Container spec (appc)](https://github.com/appc/spec) for packaging a 
+plugin.
+
+When snap loads a plugin it detects the plugins type.  If the plugin is a binary
+the plugin is run by snapd which handshakes with the plugin via reading its 
+standard output.  If the plugin is packaged as an ACI image it is extracted
+and snap executes the program referenced by the `exec` field.
+
+## Why  
+
+In cases where we can not or do not want to compile our plugin into a statically 
+linked binary we can load a plugin packaged as an ACI image.  This provides 
+an obvious advantage for plugins written in Python, Ruby, Java, etc where the 
+plugins dependencies, potentially including an entire Python virtualenv, could 
+be distributed with the plugin.  
+
+## How
+
+Since Snap leverages the appc spec for images we recommend using the 
+[acbuild](https://github.com/appc/acbuild) tool for creating images.  
+
+In the example below we package one of the mock plugins creating a plugin 
+package which can be loaded achieving the same result as if we had simply 
+loaded the binary version of the plugin. 
+
+1. Get the [acbuild](https://github.com/appc/acbuild) tool  
+    * Download the latest binary 
+    [release](https://github.com/appc/acbuild/releases) and install into your 
+    PATH.
+2. Make snap
+    * From the root of snap run: `make`
+4. Using the acbuild tool create an image containing the mock collector plugin.
+    * From the `build/plugin` directory run the following commands.
+    ``` 
+    acbuild begin
+    acbuild set-name intelsdi-x/snap-plugin-collector-mock1
+    acbuild copy snap-plugin-collector-mock1 /bin/snap-plugin-collector-mock1
+    acbuild set-exec /bin/snap-plugin-collector-mock1
+    acbuild write snap-plugin-collector-mock1-linux-x86_64.aci
+    acbuild end
+    ```
+
+That's it!  
+
+![acbuild](http://i.giphy.com/3oz8xu8AXyPDNR9sL6.gif)
+