diff --git a/src-tsp/main.tsp b/src-tsp/main.tsp
index bd19994..f68d707 100644
--- a/src-tsp/main.tsp
+++ b/src-tsp/main.tsp
@@ -15,11 +15,18 @@ model Recipe {
      */
     description: string,
 
+    /**
+     * Allows setting custom tags on the recipe’s final image.
+     * Adding tags to this property will override the `latest` and timestamp tags.
+     */
+    "alt-tags"?: Array<string>,
+
     /**
      * The [OCI](https://opencontainers.org/) image to base your custom image on.
      * Only atomic Fedora images and those based on them are officially supported.
      * Universal Blue is recommended. [A list of Universal Blue's images](https://universal-blue.org/images/) can be found on their website
-     * BlueBuild-built images can be used as well. */
+     * BlueBuild-built images can be used as well.
+     */
     "base-image": string,
     
     /**
@@ -29,6 +36,26 @@ model Recipe {
      */
     "image-version": string,
 
+    /** 
+     * A list of [stages](https://blue-build.org/reference/stages/) that are executed before the build of the final image.
+     * This is useful for compiling programs from source without polluting the final bootable image.
+     */
+    stages?: Array<{
+        /**
+         * The name of the stage. This is used when referencing
+         * the stage when using the from: property in the [`copy` module](https://blue-build.org/reference/modules/copy/).
+         */
+        name: string,
+
+        /** The full image ref (image name + tag). This will be set in the FROM statement of the stage. */
+        from: string,
+
+        /** Allows a user to pass in an array of strings that are passed directly into the [`SHELL` instruction](https://docs.docker.com/reference/dockerfile/#shell). */
+        shell?: string,
+
+        modules: Array<Module>,
+    }>,
+
     /**
      * A list of [modules](https://blue-build.org/reference/module/) that is executed in order. Multiple of the same module can be included.
      *