diff --git a/__wasm/extism/extism_container/extism_plugin.wasm b/__wasm/extism/extism_container/extism_plugin.wasm
new file mode 100755
index 0000000..a98aaac
Binary files /dev/null and b/__wasm/extism/extism_container/extism_plugin.wasm differ
diff --git a/__wasm/extism/extism_container/src/main.rs b/__wasm/extism/extism_container/src/main.rs
index c841f13..d0bb91a 100644
--- a/__wasm/extism/extism_container/src/main.rs
+++ b/__wasm/extism/extism_container/src/main.rs
@@ -1,9 +1,12 @@
 use extism::{Context, Plugin};
 
 fn main() {
-    let wasm = include_bytes!("../code.wasm");
+    let wasm = include_bytes!("../extism_plugin.wasm");
     let context = Context::new();
     let mut plugin = Plugin::new(&context, wasm, false).unwrap();
-    let data = plugin.call("count_vowels", "this is a test").unwrap();
-    assert_eq!(data, b"{\"count\": 4}");
+    let result = plugin.call("count_vowels", "this is a test");
+    println!("{:?}", result);
+    // println!("{}", result.unwrap_err());
+    let data = result.unwrap();
+    println!("{}", String::from_utf8((&data).to_vec()).unwrap());
 }
diff --git a/__wasm/extism/extism_plugin/Cargo.lock b/__wasm/extism/extism_plugin/Cargo.lock
new file mode 100644
index 0000000..cbe79a1
--- /dev/null
+++ b/__wasm/extism/extism_plugin/Cargo.lock
@@ -0,0 +1,136 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "anyhow"
+version = "1.0.66"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "216261ddc8289130e551ddcd5ce8a064710c0d064a4d2895c67151c92b5443f6"
+
+[[package]]
+name = "base64"
+version = "0.20.0-alpha.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "149ea5dc24cb11513350770afebba32b68e3d2e356f9221351a2a1ee89112a82"
+
+[[package]]
+name = "extism-manifest"
+version = "0.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e943e9de8151a8e9e45bc0703e636ba1ce1e229b4c42706c3fcc8cb0a2894b51"
+dependencies = [
+ "base64",
+ "serde",
+]
+
+[[package]]
+name = "extism-pdk"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25a3e593deeba116fbbeed4b73c33ffbdcd4223a341bd2b472242a703a52a319"
+dependencies = [
+ "anyhow",
+ "base64",
+ "extism-manifest",
+ "extism-pdk-derive",
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "extism-pdk-derive"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "659ef7e08bc205c1080a04f36f779fc3309af9e7dffc47b9372ce777bcc66d43"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "extism_plugin"
+version = "0.1.0"
+dependencies = [
+ "extism-pdk",
+ "serde",
+]
+
+[[package]]
+name = "itoa"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4217ad341ebadf8d8e724e264f13e593e0648f5b3e94b3896a5df283be015ecc"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "ryu"
+version = "1.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
+
+[[package]]
+name = "serde"
+version = "1.0.148"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e53f64bb4ba0191d6d0676e1b141ca55047d83b74f5607e6d8eb88126c52c2dc"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.148"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a55492425aa53521babf6137309e7d34c20bbfbbfcfe2c7f3a047fd1f6b92c0c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.89"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "020ff22c755c2ed3f8cf162dbb41a7268d934702f3ed3631656ea597e08fc3db"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.105"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60b9b43d45702de4c839cb9b51d9f529c5dd26a4aff255b42b1ebc03e88ee908"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
diff --git a/__wasm/extism/extism_plugin/Cargo.toml b/__wasm/extism/extism_plugin/Cargo.toml
new file mode 100644
index 0000000..e1da356
--- /dev/null
+++ b/__wasm/extism/extism_plugin/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "extism_plugin"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+crate_type = ["cdylib"]
+
+[dependencies]
+serde = "1.0.148"
+extism-pdk = "0.1.0"
diff --git a/__wasm/extism/extism_plugin/justfile b/__wasm/extism/extism_plugin/justfile
new file mode 100644
index 0000000..3acc791
--- /dev/null
+++ b/__wasm/extism/extism_plugin/justfile
@@ -0,0 +1,7 @@
+_:
+  @just --list
+
+build:
+  cargo build --release --target wasm32-unknown-unknown
+
+
diff --git a/__wasm/extism/extism_plugin/src/lib.rs b/__wasm/extism/extism_plugin/src/lib.rs
new file mode 100644
index 0000000..9d7a600
--- /dev/null
+++ b/__wasm/extism/extism_plugin/src/lib.rs
@@ -0,0 +1,23 @@
+use extism_pdk::*;
+use serde::Serialize;
+
+const VOWELS: &[char] = &['a', 'A', 'e', 'E', 'i', 'I', 'o', 'O', 'u', 'U'];
+
+#[derive(Serialize)]
+struct TestOutput {
+    pub count: i32,
+}
+
+#[plugin_fn]
+pub fn count_vowels(input: String) -> FnResult<Json<TestOutput>> {
+    let mut count = 0;
+    for ch in input.chars() {
+        if VOWELS.contains(&ch) {
+            count += 1;
+        }
+    }
+
+    let output = TestOutput { count };
+    Ok(Json(output))
+}
+