diff --git a/Cargo.lock b/Cargo.lock
index a5fd520..24e6ef2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -551,7 +551,12 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "async-trait",
+ "bytes 0.4.12",
+ "crunch-file",
  "crunch-traits",
+ "prost 0.12.1",
+ "prost-build",
+ "prost-types 0.12.1",
  "tokio",
  "tracing",
 ]
@@ -1926,13 +1931,6 @@ dependencies = [
  "windows-sys",
 ]
 
-[[package]]
-name = "test-bin"
-version = "0.1.0"
-dependencies = [
- "crunch-envelope",
-]
-
 [[package]]
 name = "textwrap"
 version = "0.16.0"
diff --git a/Cargo.toml b/Cargo.toml
index 682d8e2..2f2911e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,6 +25,7 @@ toml_edit = {version = "0.20.0",features = ["serde"]}
 serde = {version = "1.0.88", features = ["derive"]}
 prost = {version  = "0.12"}
 prost-types = {version = "0.12"}
+prost-build = "0.5"
 bytes = {version = "0.4"}
 
 
diff --git a/crates/crunch-codegen/Cargo.toml b/crates/crunch-codegen/Cargo.toml
index 01fc24d..16eb84d 100644
--- a/crates/crunch-codegen/Cargo.toml
+++ b/crates/crunch-codegen/Cargo.toml
@@ -7,8 +7,13 @@ edition = "2021"
 
 [dependencies]
 crunch-traits.workspace = true
+crunch-file.workspace = true
 
 anyhow.workspace = true
 tracing.workspace = true
 tokio.workspace = true
 async-trait.workspace = true
+prost.workspace = true
+prost-types.workspace = true
+prost-build.workspace = true
+bytes.workspace = true
diff --git a/crates/crunch-codegen/src/lib.rs b/crates/crunch-codegen/src/lib.rs
index 7d12d9a..192c2a8 100644
--- a/crates/crunch-codegen/src/lib.rs
+++ b/crates/crunch-codegen/src/lib.rs
@@ -1,14 +1,15 @@
-pub fn add(left: usize, right: usize) -> usize {
-    left + right
-}
-
 #[cfg(test)]
 mod tests {
-    use super::*;
+    #[tokio::test]
+    async fn test_can_generate_output_rust() {
+        let proto_spec = r#"
+syntax = "proto3";
 
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
+package test.can.generate.output.rust;
+
+message MyEvent {
+    string name = 1;
+}
+"#;
     }
 }
diff --git a/crates/test-bin/Cargo.toml b/crates/test-bin/Cargo.toml
deleted file mode 100644
index 1485ae8..0000000
--- a/crates/test-bin/Cargo.toml
+++ /dev/null
@@ -1,9 +0,0 @@
-[package]
-name = "test-bin"
-version = "0.1.0"
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-crunch-envelope.workspace = true
diff --git a/crates/test-bin/src/main.rs b/crates/test-bin/src/main.rs
deleted file mode 100644
index b250fd9..0000000
--- a/crates/test-bin/src/main.rs
+++ /dev/null
@@ -1,27 +0,0 @@
-fn main() {
-    #[no_mangle]
-    fn envelope_capnp_benchmark(content: &[u8]) {
-        let out = crunch_envelope::wrap("some-domain", "some-entity", content);
-
-        let out = crunch_envelope::unwrap(&out).expect("to be able to unwrap capnp message");
-
-        println!("{:?}", out.1);
-    }
-
-    #[no_mangle]
-    fn envelope_json_benchmark(content: &[u8]) {
-        let out = crunch_envelope::json::wrap("some-domain", "some-entity", content);
-
-        let out = crunch_envelope::json::unwrap(&out).expect("to be able to unwrap capnp message");
-
-        println!("{:?}", out.1);
-    }
-
-    let large_content: [u8; 1000000] = [0; 1000000];
-
-    envelope_capnp_benchmark(&large_content);
-
-    envelope_json_benchmark(&large_content);
-
-    println!("done")
-}