diff --git a/Makefile b/Makefile
index 28ac177..1269985 100644
--- a/Makefile
+++ b/Makefile
@@ -55,6 +55,7 @@ kifu-pwa:
 
 kifu-pwa/dev:
 	pushd kifu/ffi/wasm && make && popd
+	pushd kifu/core-types && make && popd
 	pushd kifu/kifu-pwa && make dev
 
 kifu-pwa/test-server:
diff --git a/kifu/core-types/Makefile b/kifu/core-types/Makefile
new file mode 100644
index 0000000..d3b1f09
--- /dev/null
+++ b/kifu/core-types/Makefile
@@ -0,0 +1,6 @@
+
+SOURCES = $(shell find ../kifu-core -name "*.rs")
+dist/core.d.ts: $(SOURCES)
+	mkdir -p dist
+	typeshare ../kifu-core --lang=typescript --output-file=dist/core.d.ts
+
diff --git a/kifu/core-types/package.json b/kifu/core-types/package.json
new file mode 100644
index 0000000..4691e70
--- /dev/null
+++ b/kifu/core-types/package.json
@@ -0,0 +1,12 @@
+{
+  "name": "core-types",
+  "version": "0.0.1",
+  "description": "",
+  "types": "dist/core.d.ts",
+  "scripts": {
+    "build": "make",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Savanni D'Gerinel <savanni@luminescent-dreams.com>",
+  "license": "GPL-3.0-or-later"
+}
diff --git a/kifu/ffi/wasm/Cargo.lock b/kifu/ffi/wasm/Cargo.lock
index ee15236..e2f131e 100644
--- a/kifu/ffi/wasm/Cargo.lock
+++ b/kifu/ffi/wasm/Cargo.lock
@@ -172,6 +172,8 @@ name = "kifu-wasm"
 version = "0.1.0"
 dependencies = [
  "kifu-core",
+ "serde",
+ "serde-wasm-bindgen",
  "wasm-bindgen",
  "wasm-bindgen-futures",
 ]
@@ -270,6 +272,17 @@ dependencies = [
  "serde_derive",
 ]
 
+[[package]]
+name = "serde-wasm-bindgen"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3b143e2833c57ab9ad3ea280d21fd34e285a42837aeb0ee301f4f41890fa00e"
+dependencies = [
+ "js-sys",
+ "serde",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "serde_derive"
 version = "1.0.160"
diff --git a/kifu/ffi/wasm/Cargo.toml b/kifu/ffi/wasm/Cargo.toml
index d2407ce..03475b2 100644
--- a/kifu/ffi/wasm/Cargo.toml
+++ b/kifu/ffi/wasm/Cargo.toml
@@ -9,9 +9,11 @@ edition = "2021"
 crate-type = ["cdylib"]
 
 [dependencies]
-kifu-core = { path = "../../kifu-core" }
-wasm-bindgen = "0.2"
-wasm-bindgen-futures = "*"
+kifu-core               = { path = "../../kifu-core" }
+serde                   = { version = "1.0", features = ["derive"] }
+serde-wasm-bindgen      = "0.5.0"
+wasm-bindgen            = "0.2"
+wasm-bindgen-futures    = "*"
 
 [package.metadata.wasm-pack.profile.release]
 wasm-opt = false
diff --git a/kifu/ffi/wasm/src/lib.rs b/kifu/ffi/wasm/src/lib.rs
index 3b14a16..6a457ca 100644
--- a/kifu/ffi/wasm/src/lib.rs
+++ b/kifu/ffi/wasm/src/lib.rs
@@ -1,4 +1,6 @@
 use wasm_bindgen::prelude::*;
+// use serde::{Serialize, Deserialize};
+use kifu_core::{CoreRequest, CoreResponse};
 
 #[wasm_bindgen]
 extern "C" {
@@ -8,8 +10,11 @@ extern "C" {
 
 /*
 #[wasm_bindgen]
+#[derive(Serialize, Deserialize)]
 pub struct CoreRequest(kifu_core::Request);
+*/
 
+/*
 #[wasm_bindgen]
 impl CoreRequest {
     #[wasm_bindgen(constructor)]
@@ -22,22 +27,26 @@ impl CoreRequest {
 /* Somehow uncommenting this code actually causes the module to not load. Maybe a name conflict?
  * Don't know.
  */
+/*
 #[wasm_bindgen]
+#[derive(Serialize, Deserialize)]
 pub struct CoreResponse(kifu_core::Response);
+*/
 
 #[wasm_bindgen]
 #[derive(Debug)]
-pub struct CoreApp;
+pub struct CoreApp(kifu_core::CoreApp);
 
 #[wasm_bindgen]
 impl CoreApp {
     #[wasm_bindgen(constructor)]
     pub fn new() -> Self {
-        Self
+        Self(kifu_core::CoreApp::new())
     }
 
     #[wasm_bindgen]
-    pub async fn dispatch(&self, param: &JsValue) {
-        log(&format!("disptach! {:?}", param));
+    pub async fn dispatch(&self, param: &JsValue) -> JsValue {
+        let request: CoreRequest = serde_wasm_bindgen::from_value(param.clone()).unwrap();
+        serde_wasm_bindgen::to_value(&self.0.dispatch(request).await).unwrap()
     }
 }
diff --git a/kifu/kifu-core/src/api.rs b/kifu/kifu-core/src/api.rs
index d34e05d..8635268 100644
--- a/kifu/kifu-core/src/api.rs
+++ b/kifu/kifu-core/src/api.rs
@@ -7,7 +7,7 @@ use typeshare::typeshare;
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
 #[typeshare]
 #[serde(tag = "type", content = "content")]
-pub enum Request {
+pub enum CoreRequest {
     PlayingField,
     PlayStoneRequest(PlayStoneRequest),
 }
@@ -15,14 +15,14 @@ pub enum Request {
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
 #[typeshare]
 pub struct PlayStoneRequest {
-    pub column: usize,
-    pub row: usize,
+    pub column: u8,
+    pub row: u8,
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
 #[typeshare]
 #[serde(tag = "type", content = "content")]
-pub enum Response {
+pub enum CoreResponse {
     PlayingFieldView(PlayingFieldView),
 }
 
@@ -38,19 +38,19 @@ impl CoreApp {
         Self { state }
     }
 
-    pub async fn dispatch(&self, request: Request) -> Response {
+    pub async fn dispatch(&self, request: CoreRequest) -> CoreResponse {
         match request {
-            Request::PlayingField => {
+            CoreRequest::PlayingField => {
                 let app_state = self.state.read().unwrap();
                 let game = app_state.game.as_ref().unwrap();
-                Response::PlayingFieldView(playing_field(game))
+                CoreResponse::PlayingFieldView(playing_field(game))
             }
-            Request::PlayStoneRequest(request) => {
+            CoreRequest::PlayStoneRequest(request) => {
                 let mut app_state = self.state.write().unwrap();
                 app_state.place_stone(request);
 
                 let game = app_state.game.as_ref().unwrap();
-                Response::PlayingFieldView(playing_field(game))
+                CoreResponse::PlayingFieldView(playing_field(game))
             }
         }
     }
diff --git a/kifu/kifu-core/src/board.rs b/kifu/kifu-core/src/board.rs
index 55a3fc5..8a7b790 100644
--- a/kifu/kifu-core/src/board.rs
+++ b/kifu/kifu-core/src/board.rs
@@ -73,8 +73,8 @@ impl Board {
 
 #[derive(Clone, Copy, Debug, PartialEq, Hash, Eq)]
 pub struct Coordinate {
-    pub column: usize,
-    pub row: usize,
+    pub column: u8,
+    pub row: u8,
 }
 
 impl Board {
diff --git a/kifu/kifu-core/src/lib.rs b/kifu/kifu-core/src/lib.rs
index 8b598bb..bcdd2a0 100644
--- a/kifu/kifu-core/src/lib.rs
+++ b/kifu/kifu-core/src/lib.rs
@@ -1,5 +1,5 @@
 mod api;
-pub use api::{CoreApp, Request, Response};
+pub use api::{CoreApp, CoreRequest, CoreResponse};
 
 mod types;
 pub use types::{BoardError, Color, Size};
diff --git a/kifu/kifu-core/src/types.rs b/kifu/kifu-core/src/types.rs
index 129c9ba..3a1b3f3 100644
--- a/kifu/kifu-core/src/types.rs
+++ b/kifu/kifu-core/src/types.rs
@@ -27,8 +27,8 @@ pub enum Color {
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
 #[typeshare]
 pub struct Size {
-    pub width: usize,
-    pub height: usize,
+    pub width: u8,
+    pub height: u8,
 }
 
 impl Default for Size {
diff --git a/kifu/kifu-core/src/ui/types.rs b/kifu/kifu-core/src/ui/types.rs
index 7f226cc..c12c416 100644
--- a/kifu/kifu-core/src/ui/types.rs
+++ b/kifu/kifu-core/src/ui/types.rs
@@ -1,6 +1,6 @@
 use crate::types::{Color, Size};
 use crate::{
-    api::{PlayStoneRequest, Request},
+    api::{CoreRequest, PlayStoneRequest},
     Board, Coordinate,
 };
 use serde::{Deserialize, Serialize};
@@ -36,7 +36,7 @@ impl StoneElement {
 #[serde(tag = "type", content = "content")]
 pub enum IntersectionElement {
     Unplayable,
-    Empty(Request),
+    Empty(CoreRequest),
     Filled(StoneElement),
 }
 
@@ -53,10 +53,9 @@ impl BoardElement {
             .map(|row| {
                 (0..size.width)
                     .map(|column| {
-                        IntersectionElement::Empty(Request::PlayStoneRequest(PlayStoneRequest {
-                            column,
-                            row,
-                        }))
+                        IntersectionElement::Empty(CoreRequest::PlayStoneRequest(
+                            PlayStoneRequest { column, row },
+                        ))
                     })
                     .collect::<Vec<IntersectionElement>>()
             })
@@ -86,7 +85,7 @@ impl From<&Board> for BoardElement {
                             liberties: None,
                             color,
                         }),
-                        None => IntersectionElement::Empty(Request::PlayStoneRequest(
+                        None => IntersectionElement::Empty(CoreRequest::PlayStoneRequest(
                             PlayStoneRequest { column, row },
                         )),
                     })
diff --git a/kifu/kifu-pwa/Makefile b/kifu/kifu-pwa/Makefile
index 65d915d..251b688 100644
--- a/kifu/kifu-pwa/Makefile
+++ b/kifu/kifu-pwa/Makefile
@@ -4,3 +4,4 @@ dev:
 
 test-server:
 	npx http-server ./dist
+
diff --git a/kifu/kifu-pwa/core.d.ts b/kifu/kifu-pwa/core.d.ts
deleted file mode 100644
index c1236cb..0000000
--- a/kifu/kifu-pwa/core.d.ts
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- Generated by typeshare 1.5.0
-*/
-
-export interface PlayStoneRequest {
-	column: number;
-	row: number;
-}
-
-export interface Size {
-	width: number;
-	height: number;
-}
-
-export type IntersectionElement = 
-	| { type: "Unplayable", content?: undefined }
-	| { type: "Empty", content: Request }
-	| { type: "Filled", content: StoneElement };
-
-export interface BoardElement {
-	size: Size;
-	spaces: IntersectionElement[];
-}
-
-export enum Color {
-	Black = "Black",
-	White = "White",
-}
-
-export interface PlayerCardElement {
-	color: Color;
-	name: string;
-	rank: string;
-	clock: string;
-}
-
-export interface ChatElement {
-	messages: string[];
-}
-
-export interface TextFieldElement {
-}
-
-export interface PlayingFieldView {
-	board: BoardElement;
-	player_card_black: PlayerCardElement;
-	player_card_white: PlayerCardElement;
-	chat: ChatElement;
-	message: TextFieldElement;
-	current_player: Color;
-}
-
-export interface Jitter {
-	x: number;
-	y: number;
-}
-
-export interface StoneElement {
-	color: Color;
-	jitter: Jitter;
-}
-
-export type Request = 
-	| { type: "PlayingField", content?: undefined }
-	| { type: "PlayStoneRequest", content: PlayStoneRequest };
-
-export type Response = 
-	| { type: "PlayingFieldView", content: PlayingFieldView };
-
diff --git a/kifu/kifu-pwa/src/converter.ts b/kifu/kifu-pwa/src/converter.ts
deleted file mode 100644
index 3332d4a..0000000
--- a/kifu/kifu-pwa/src/converter.ts
+++ /dev/null
@@ -1,52 +0,0 @@
-import init, { CoreApp } from "kifu-wasm";
-
-const inputField = document.getElementById("input-temp");
-const fromUnitField = document.getElementById("input-unit");
-const toUnitField = document.getElementById("output-unit");
-const outputField = document.getElementById("output-temp");
-const form = document.getElementById("converter");
-
-function convertTemp(value, fromUnit, toUnit) {
-  if (fromUnit === "c") {
-    if (toUnit === "f") {
-      return (value * 9) / 5 + 32;
-    } else if (toUnit === "k") {
-      return value + 273.15;
-    }
-    return value;
-  }
-  if (fromUnit === "f") {
-    if (toUnit === "c") {
-      return ((value - 32) * 5) / 9;
-    } else if (toUnit === "k") {
-      return ((value + 459.67) * 5) / 9;
-    }
-    return value;
-  }
-  if (fromUnit === "k") {
-    if (toUnit === "c") {
-      return value - 273.15;
-    } else if (toUnit === "f") {
-      return (value * 9) / 5 - 459.67;
-    }
-    return value;
-  }
-  throw new Error("Invalid unit");
-}
-
-form.addEventListener("input", () => {
-  const inputTemp = parseFloat(inputField.value);
-  const fromUnit = fromUnitField.value;
-  const toUnit = toUnitField.value;
-
-  const outputTemp = convertTemp(inputTemp, fromUnit, toUnit);
-  outputField.value =
-    Math.round(outputTemp * 100) / 100 + " " + toUnit.toUpperCase();
-});
-
-init().then(async () => {
-  let app = new CoreApp();
-  console.log("app: ", app, CoreApp);
-  await app.dispatch({ type: "PlayingField" });
-  console.log("kifu_wasm successfully initted");
-});
diff --git a/kifu/kifu-pwa/src/coreApi.ts b/kifu/kifu-pwa/src/coreApi.ts
new file mode 100644
index 0000000..e5e4feb
--- /dev/null
+++ b/kifu/kifu-pwa/src/coreApi.ts
@@ -0,0 +1,24 @@
+import init, { CoreApp } from "kifu-wasm";
+import { CoreResponse, CoreRequest, PlayingFieldView } from "core-types";
+
+export class CoreApi {
+  core: CoreApp;
+
+  constructor() {
+    let app = new CoreApp();
+    this.core = app;
+  }
+
+  async dispatch(request: CoreRequest): Promise<CoreResponse> {
+    return await this.core.dispatch(request);
+  }
+
+  async playingField(): Promise<PlayingFieldView> {
+    return (await this.dispatch({ type: "PlayingField" })).content;
+  }
+}
+
+export const initCore = async (): Promise<CoreApi> => {
+  await init();
+  return new CoreApi();
+};
diff --git a/kifu/kifu-pwa/src/main.ts b/kifu/kifu-pwa/src/main.ts
index afd966a..3332ebb 100644
--- a/kifu/kifu-pwa/src/main.ts
+++ b/kifu/kifu-pwa/src/main.ts
@@ -1,10 +1,8 @@
-import init, { CoreApp } from "kifu-wasm";
+import { CoreApi, initCore } from "./coreApi";
 
 const main = async () => {
-  await init();
-  let coreApi = new CoreApp();
-
-  let response = await coreApi.dispatch({ type: "PlayingField" });
+  let coreApi = await initCore();
+  let response = await coreApi.playingField();
   console.log("playing field response: ", response);
 };
 
diff --git a/kifu/kifu-pwa/webpack.config.js b/kifu/kifu-pwa/webpack.config.js
index 8fb82a3..63f2c9c 100644
--- a/kifu/kifu-pwa/webpack.config.js
+++ b/kifu/kifu-pwa/webpack.config.js
@@ -6,9 +6,9 @@ module.exports = {
         "kifu-bundle": "./src/main.ts",
         sw: "./src/sw.js",
     },
-    loader: {
+    module: {
         rules:  [
-            { test: /.ts$/, use: "ts-loader", exclude: /node_modules/ },
+            { test: /\.ts$/, use: "ts-loader", exclude: /node_modules/ },
             { test: /\.wasm$/, type: "asset/inline" }
         ],
     },
@@ -19,5 +19,8 @@ module.exports = {
                 { from: "src/converter.css" }
             ]
         })
-    ]
+    ],
+    resolve: {
+        extensions: ['.ts'],
+    }
 }
diff --git a/package-lock.json b/package-lock.json
index 0afbd30..9aac826 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7,10 +7,16 @@
             "name": "tools",
             "workspaces": [
                 "kifu/ffi/wasm/pkg",
+                "kifu/core-types",
                 "kifu/kifu-pwa"
             ]
         },
+        "kifu/core-types": {
+            "version": "0.0.1",
+            "license": "GPL-3.0-or-later"
+        },
         "kifu/ffi/wasm/pkg": {
+            "name": "kifu-wasm",
             "version": "0.1.0"
         },
         "kifu/kifu-pwa": {
@@ -616,6 +622,10 @@
                 "webpack": "^5.1.0"
             }
         },
+        "node_modules/core-types": {
+            "resolved": "kifu/core-types",
+            "link": true
+        },
         "node_modules/cross-spawn": {
             "version": "7.0.3",
             "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
diff --git a/package.json b/package.json
index 95dab61..9ce3a4d 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
     "name": "tools",
     "workspaces": [
         "kifu/ffi/wasm/pkg",
+        "kifu/core-types",
         "kifu/kifu-pwa"
     ]
 }