diff --git a/README.md b/README.md
index 230e224..59b56c6 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,28 @@
-# wasm-packs
+# Example of Cloud Native Buildpacks for Wasm
 
+This repository contains a set of build packs and example Wasm applications to demonstrate how to build and run Wasm applications using Cloud Native Buildpacks.
+
+## The Parts
+### Base Images
+The `base-images` directory contains the Dockerfiles for the base images used by the buildpacks. The `build.sh` script builds the base images used for build
+and run in the buildpacks. They are based on the Heroku stack images.
+
+### Builders
+The `builders` directory contains the builder for the Wasm buildpacks.
+
+### Buildpacks
+The `buildpacks` directory contains the buildpacks used in the builder.
+
+#### Meta-buildpacks
+The `meta-buildpacks` directory contains the meta-buildpacks used in the builder.
+
+### Apps
+The `apps` directory contains the example Wasm applications. The `js` directory contains a simple Wasm application written in Rust and compiled to Wasm. The `compose` directory contains a multi-component Wasm microservice application using both JS and Golang to demonstrate the use of multiple languages in a single application.
+
+## Building and Running the Example
 ```bash
 ./base-images/build.sh wasm
 pack builder create wasm/demo-builder:wasm --config ../builders/wasm/builder.toml
-pack build test-wasm-js --builder wasm/demo-builder:wasm --path apps/js/
-docker run --rm -it -p 8080:8080 test-wasm-js
+pack build wasm-compose --builder wasm/demo-builder:wasm --path apps/compose/
+docker run --rm -it -p 8080:8080 -e OPENAI_API_KEY wasm-compose
 ```
diff --git a/apps/compose/app-js/src/server.js b/apps/compose/app-js/src/server.js
index a39b925..1106cd4 100644
--- a/apps/compose/app-js/src/server.js
+++ b/apps/compose/app-js/src/server.js
@@ -30,8 +30,9 @@ router
   })
   .get("/chat", (request) => {
     let prompt = request.query["prompt"];
+    let model = request.query["model"];
     let chatRequest = {
-      model: "gpt-4o-mini",
+      model: model ?? "gpt-4o-mini",
       messages: [
         {
           role: "user",
diff --git a/apps/compose/service-go/service.go b/apps/compose/service-go/service.go
index ca218ec..8f5c9ac 100644
--- a/apps/compose/service-go/service.go
+++ b/apps/compose/service-go/service.go
@@ -54,7 +54,8 @@ func init() {
 				Message: chatErr.Message,
 			})
 		}
-		return cm.OK[cm.Result[chat.ChatResponseShape, chat.ChatResponse, chat.Error]](res)
+		cmOk := cm.OK[cm.Result[chat.ChatResponseShape, chat.ChatResponse, chat.Error]](res)
+		return cmOk
 	}
 
 }
diff --git a/buildpacks/wac-composer/bin/build b/buildpacks/wac-composer/bin/build
index abe0bfe..e86fd5f 100644
--- a/buildpacks/wac-composer/bin/build
+++ b/buildpacks/wac-composer/bin/build
@@ -40,6 +40,6 @@ cat > "${CNB_LAYERS_DIR}/launch.toml" << EOL
 [[processes]]
 type = "web"
 command = ["wasmtime"]
-args = ["serve", "-S", "cli", "--env", "OPENAI_API_KEY", "--allow-precompiled", "${wasm_component_layer}/composed.cwasm"]
+args = ["serve", "-S", "cli", "--env", "--allow-precompiled", "${wasm_component_layer}/composed.cwasm"]
 default = true
 EOL