diff --git a/app/routes/[...index].ts b/app/routes/[...index].ts
index 6d824a0..f5e0c55 100644
--- a/app/routes/[...index].ts
+++ b/app/routes/[...index].ts
@@ -1,262 +1,6 @@
 /**
  * McFly SSR logic
  */
-
-import { ELEMENT_NODE, parse, render, renderSync, walkSync } from "ultrahtml";
-import { parseScript } from "esprima";
+import McFly from "@mcflyjs/core";
 import config from "../mcfly.config";
-
-const { components: componentType } = config();
-
-export default eventHandler(async (event) => {
-  const { path } = event;
-  let html = await getHtml(path);
-
-  // transforms
-  const transforms = [doSetUp, deleteServerScripts];
-  if (html) {
-    for (const transform of transforms) {
-      html = transform(html.toString());
-    }
-  }
-
-  html = await useFragments(html.toString());
-
-  if (!!componentType && !!html) {
-    html = await insertRegistry(html.toString(), componentType);
-  }
-
-  return html ?? new Response("Not found", { status: 404 });
-});
-
-const getHtml = async (path: string) => {
-  const rawPath = path[path.length - 1] === "/" ? path.slice(0, -1) : path;
-  const filename = rawPath === "" ? "/index.html" : `${rawPath}.html`;
-  const fallback = getPath(rawPath + "/index.html");
-  const filePath = getPath(filename);
-  let html = await useStorage().getItem(filePath);
-  if (!html) html = await useStorage().getItem(fallback);
-  if (!html) html = await useStorage().getItem(getPath("/404.html"));
-
-  return html;
-};
-
-function getPath(filename: string) {
-  return `assets/pages${filename}`;
-}
-
-async function insertRegistry(
-  html: string,
-  type: "js" | "ts"
-): Promise<string> {
-  const ast = parse(html);
-  const componentFiles = await getFiles(type);
-  const availableComponents = componentFiles.map((key) =>
-    key.replace(`.${type}`, "")
-  );
-
-  const usedCustomElements = [];
-
-  walkSync(ast, (node) => {
-    const usedElement = availableComponents.find((name) => name === node.name);
-
-    if (node.type === ELEMENT_NODE && !!usedElement) {
-      usedCustomElements.push(usedElement);
-    }
-  });
-
-  // insert registry script to head
-  if (usedCustomElements.length > 0) {
-    const registryScript = await buildRegistry(usedCustomElements, type);
-    walkSync(ast, (node) => {
-      if (node.type === ELEMENT_NODE && node.name === "head") {
-        node.children.push(parse(registryScript));
-      }
-    });
-  }
-
-  return render(ast);
-}
-
-async function buildRegistry(usedCustomElements: string[], type: "js" | "ts") {
-  let registryScript = `<script type='module'>`;
-  let isBaseClassImported = false;
-  let classesImported = [];
-
-  for (const name of usedCustomElements) {
-    const content = await useStorage().getItem(
-      `assets:components:${name}.${type}`
-    );
-    const evalStore = eval(
-      `class WebComponent {}; class HTMLElement {}; (${content.toString()})`
-    );
-    const className = new evalStore().constructor.name;
-
-    if (!classesImported.includes(className)) {
-      if (
-        !isBaseClassImported &&
-        content.toString().includes("extends WebComponent")
-      ) {
-        const baseClassImport = `import { WebComponent } from "https://unpkg.com/web-component-base@1.9.1/WebComponent.mjs";`;
-
-        registryScript += baseClassImport;
-        isBaseClassImported = true;
-      }
-
-      registryScript += content;
-
-      registryScript += `customElements.define("${name}", ${className});`;
-      classesImported.push(className);
-    }
-  }
-
-  registryScript += "</script>";
-
-  return registryScript;
-}
-
-function doSetUp(html: string) {
-  const ast = parse(html);
-  const serverScripts = [];
-  walkSync(ast, (node) => {
-    const { attributes } = node;
-    const attributeKeys = Object.keys(attributes ?? {});
-    const isServerScript = attributeKeys.some((key) => key.includes("server:"));
-    if (
-      node.type === ELEMENT_NODE &&
-      node.name === "script" &&
-      isServerScript
-    ) {
-      const scripts = node.children.map((child) => child.value);
-      const script = cleanScript(scripts);
-      serverScripts.push(script);
-    }
-  });
-
-  const setupMap = {};
-  serverScripts.forEach((script: string) => {
-    const { body } = parseScript(script);
-    const keys = body
-      .filter((node) => node.type === "VariableDeclaration")
-      .map((node) => node.declarations[0].id.name);
-    const constructor = `(function(){}.constructor)(\`${script}; return {${keys.join(
-      ","
-    )}}\`);`;
-    const evalStore = eval(constructor);
-    Object.assign(setupMap, new evalStore());
-  });
-
-  const regex = /{{(.*?)}}/g;
-  var match;
-
-  while ((match = regex.exec(html))) {
-    let [key, value] = match;
-    value = value.replace(/\s/g, "");
-    html = html.replace(key, setupMap[value]);
-  }
-
-  return html;
-}
-
-function deleteServerScripts(html: string): string {
-  const ast = parse(html);
-  walkSync(ast, (node) => {
-    const { attributes } = node;
-    const attributeKeys = Object.keys(attributes ?? {});
-    const isServerScript = attributeKeys.some((key) => key.includes("server:"));
-    if (isServerScript) {
-      node.parent.children.splice(node.parent.children.indexOf(node), 1);
-    }
-  });
-
-  return renderSync(ast);
-}
-
-function cleanScript(scripts: string[]): string {
-  let script = scripts.map((s) => s.trim()).join(" ");
-
-  script = removeComments(script);
-
-  return script.replace(/\n/g, "").replace(/\s+/g, " ");
-}
-
-function isComment(node) {
-  return (
-    node.type === "Line" ||
-    node.type === "Block" ||
-    node.type === "BlockComment" ||
-    node.type === "LineComment"
-  );
-}
-
-function removeComments(script: string) {
-  const entries = [];
-  parseScript(script, { comment: true }, function (node, meta) {
-    if (isComment(node)) {
-      entries.push({
-        start: meta.start.offset,
-        end: meta.end.offset,
-      });
-    }
-  });
-
-  entries
-    .sort((a, b) => {
-      return b.end - a.end;
-    })
-    .forEach((n) => {
-      script = script.slice(0, n.start) + script.slice(n.end);
-    });
-  return script;
-}
-
-async function useFragments(html: string) {
-  const fragmentFiles = await getFiles("html");
-
-  const availableFragments = fragmentFiles.reduce((acc, key) => {
-    return {
-      ...acc,
-      [key.replace(".html", "")]: "",
-    };
-  }, {});
-  const ast = parse(html);
-
-  for (const key in availableFragments) {
-    let text: string = await useStorage().getItem(
-      "assets:components:" + key + ".html"
-    );
-    availableFragments[key] = text.replace(/\n/g, "").replace(/\s+/g, " ");
-  }
-
-  walkSync(ast, (node) => {
-    const selector = Object.keys(availableFragments).find(
-      (name) => name === node.name
-    );
-
-    if (node.type === ELEMENT_NODE && !!selector) {
-      const index = node.parent.children.indexOf(node);
-      const fragmentNode = parse(availableFragments[selector]);
-
-      replaceSlots(fragmentNode, node);
-
-      node.parent.children[index] = fragmentNode;
-    }
-  });
-
-  return render(ast);
-}
-
-function replaceSlots(fragmentNode, node) {
-  walkSync(fragmentNode, (n) => {
-    if (n.type === ELEMENT_NODE && n.name === "slot") {
-      const index = n.parent.children.indexOf(n);
-      n.parent.children.splice(index, 1, ...node.children);
-    }
-  });
-}
-
-async function getFiles(type: string) {
-  return (await useStorage().getKeys("assets:components"))
-    .map((key) => key.replace("assets:components:", ""))
-    .filter((key) => key.includes(type));
-}
+export default McFly(config, useStorage);
diff --git a/package-lock.json b/package-lock.json
index 9cb0cc4..3ac5445 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3981,10 +3981,15 @@
       "name": "@mcflyjs/core",
       "version": "0.0.1",
       "license": "MIT",
-      "devDependencies": {}
+      "dependencies": {
+        "esprima": "^4.0.1",
+        "h3": "^1.8.2",
+        "nitropack": "^2.7.0",
+        "ultrahtml": "^1.5.2"
+      }
     },
     "packages/create-mcfly": {
-      "version": "0.0.4",
+      "version": "0.0.5",
       "license": "MIT",
       "bin": {
         "create-mcfly": "index.js"
diff --git a/packages/core/index.ts b/packages/core/index.ts
new file mode 100644
index 0000000..def1327
--- /dev/null
+++ b/packages/core/index.ts
@@ -0,0 +1,268 @@
+import { eventHandler } from "h3";
+import { ELEMENT_NODE, parse, render, renderSync, walkSync } from "ultrahtml";
+import { parseScript } from "esprima";
+
+export default (config: Function, useStorage) => {
+  const { componentType } = config();
+  return eventHandler(async (event) => {
+    const { path } = event;
+    let html = await getHtml(path, useStorage);
+
+    // transforms
+    const transforms = [doSetUp, deleteServerScripts];
+    if (html) {
+      for (const transform of transforms) {
+        html = transform(html.toString());
+      }
+    }
+
+    html = await useFragments(html.toString(), useStorage);
+
+    if (!!componentType && !!html) {
+      html = await insertRegistry(html.toString(), componentType, useStorage);
+    }
+
+    return html ?? new Response("Not found", { status: 404 });
+  });
+};
+
+const getHtml = async (path: string, useStorage) => {
+  const rawPath = path[path.length - 1] === "/" ? path.slice(0, -1) : path;
+  const filename = rawPath === "" ? "/index.html" : `${rawPath}.html`;
+  const fallback = getPath(rawPath + "/index.html");
+  const filePath = getPath(filename);
+  let html = await useStorage().getItem(filePath);
+  if (!html) html = await useStorage().getItem(fallback);
+  if (!html) html = await useStorage().getItem(getPath("/404.html"));
+
+  return html;
+};
+
+function getPath(filename: string) {
+  return `assets/pages${filename}`;
+}
+
+async function insertRegistry(
+  html: string,
+  type: "js" | "ts",
+  useStorage
+): Promise<string> {
+  const ast = parse(html);
+  const componentFiles = await getFiles(type, useStorage);
+  const availableComponents = componentFiles.map((key) =>
+    key.replace(`.${type}`, "")
+  );
+
+  const usedCustomElements = [];
+
+  walkSync(ast, (node) => {
+    const usedElement = availableComponents.find((name) => name === node.name);
+
+    if (node.type === ELEMENT_NODE && !!usedElement) {
+      usedCustomElements.push(usedElement);
+    }
+  });
+
+  // insert registry script to head
+  if (usedCustomElements.length > 0) {
+    const registryScript = await buildRegistry(
+      usedCustomElements,
+      type,
+      useStorage
+    );
+    walkSync(ast, (node) => {
+      if (node.type === ELEMENT_NODE && node.name === "head") {
+        node.children.push(parse(registryScript));
+      }
+    });
+  }
+
+  return render(ast);
+}
+
+async function buildRegistry(
+  usedCustomElements: string[],
+  type: "js" | "ts",
+  useStorage
+) {
+  let registryScript = `<script type='module'>`;
+  let isBaseClassImported = false;
+  let classesImported = [];
+
+  for (const name of usedCustomElements) {
+    const content = await useStorage().getItem(
+      `assets:components:${name}.${type}`
+    );
+    const evalStore = eval(
+      `class WebComponent {}; class HTMLElement {}; (${content.toString()})`
+    );
+    const className = new evalStore().constructor.name;
+
+    if (!classesImported.includes(className)) {
+      if (
+        !isBaseClassImported &&
+        content.toString().includes("extends WebComponent")
+      ) {
+        const baseClassImport = `import { WebComponent } from "https://unpkg.com/web-component-base@1.9.1/WebComponent.mjs";`;
+
+        registryScript += baseClassImport;
+        isBaseClassImported = true;
+      }
+
+      registryScript += content;
+
+      registryScript += `customElements.define("${name}", ${className});`;
+      classesImported.push(className);
+    }
+  }
+
+  registryScript += "</script>";
+
+  return registryScript;
+}
+
+function doSetUp(html: string) {
+  const ast = parse(html);
+  const serverScripts = [];
+  walkSync(ast, (node) => {
+    const { attributes } = node;
+    const attributeKeys = Object.keys(attributes ?? {});
+    const isServerScript = attributeKeys.some((key) => key.includes("server:"));
+    if (
+      node.type === ELEMENT_NODE &&
+      node.name === "script" &&
+      isServerScript
+    ) {
+      const scripts = node.children.map((child) => child.value);
+      const script = cleanScript(scripts);
+      serverScripts.push(script);
+    }
+  });
+
+  const setupMap = {};
+  serverScripts.forEach((script: string) => {
+    const { body } = parseScript(script);
+    const keys = body
+      .filter((node) => node.type === "VariableDeclaration")
+      .map((node) => node.declarations[0].id.name);
+    const constructor = `(function(){}.constructor)(\`${script}; return {${keys.join(
+      ","
+    )}}\`);`;
+    const evalStore = eval(constructor);
+    Object.assign(setupMap, new evalStore());
+  });
+
+  const regex = /{{(.*?)}}/g;
+  var match;
+
+  while ((match = regex.exec(html))) {
+    let [key, value] = match;
+    value = value.replace(/\s/g, "");
+    html = html.replace(key, setupMap[value]);
+  }
+
+  return html;
+}
+
+function deleteServerScripts(html: string): string {
+  const ast = parse(html);
+  walkSync(ast, (node) => {
+    const { attributes } = node;
+    const attributeKeys = Object.keys(attributes ?? {});
+    const isServerScript = attributeKeys.some((key) => key.includes("server:"));
+    if (isServerScript) {
+      node.parent.children.splice(node.parent.children.indexOf(node), 1);
+    }
+  });
+
+  return renderSync(ast);
+}
+
+function cleanScript(scripts: string[]): string {
+  let script = scripts.map((s) => s.trim()).join(" ");
+
+  script = removeComments(script);
+
+  return script.replace(/\n/g, "").replace(/\s+/g, " ");
+}
+
+function isComment(node) {
+  return (
+    node.type === "Line" ||
+    node.type === "Block" ||
+    node.type === "BlockComment" ||
+    node.type === "LineComment"
+  );
+}
+
+function removeComments(script: string) {
+  const entries = [];
+  parseScript(script, { comment: true }, function (node, meta) {
+    if (isComment(node)) {
+      entries.push({
+        start: meta.start.offset,
+        end: meta.end.offset,
+      });
+    }
+  });
+
+  entries
+    .sort((a, b) => {
+      return b.end - a.end;
+    })
+    .forEach((n) => {
+      script = script.slice(0, n.start) + script.slice(n.end);
+    });
+  return script;
+}
+
+async function useFragments(html: string, useStorage) {
+  const fragmentFiles = await getFiles("html", useStorage);
+
+  const availableFragments = fragmentFiles.reduce((acc, key) => {
+    return {
+      ...acc,
+      [key.replace(".html", "")]: "",
+    };
+  }, {});
+  const ast = parse(html);
+
+  for (const key in availableFragments) {
+    let text: string = await useStorage().getItem(
+      "assets:components:" + key + ".html"
+    );
+    availableFragments[key] = text.replace(/\n/g, "").replace(/\s+/g, " ");
+  }
+
+  walkSync(ast, (node) => {
+    const selector = Object.keys(availableFragments).find(
+      (name) => name === node.name
+    );
+
+    if (node.type === ELEMENT_NODE && !!selector) {
+      const index = node.parent.children.indexOf(node);
+      const fragmentNode = parse(availableFragments[selector]);
+
+      replaceSlots(fragmentNode, node);
+
+      node.parent.children[index] = fragmentNode;
+    }
+  });
+
+  return render(ast);
+}
+
+function replaceSlots(fragmentNode, node) {
+  walkSync(fragmentNode, (n) => {
+    if (n.type === ELEMENT_NODE && n.name === "slot") {
+      const index = n.parent.children.indexOf(n);
+      n.parent.children.splice(index, 1, ...node.children);
+    }
+  });
+}
+
+async function getFiles(type: string, useStorage) {
+  return (await useStorage().getKeys("assets:components"))
+    .map((key) => key.replace("assets:components:", ""))
+    .filter((key) => key.includes(type));
+}
diff --git a/packages/core/package.json b/packages/core/package.json
index 21f442f..dc802fb 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -2,9 +2,9 @@
   "name": "@mcflyjs/core",
   "version": "0.0.1",
   "description": "McFly core package",
-  "main": "index.js",
-  "devDependencies": {},
+  "main": "index.ts",
   "files": [
+    "index.ts",
     "define-config.ts"
   ],
   "scripts": {
@@ -20,5 +20,11 @@
   "bugs": {
     "url": "https://github.com/ayoayco/McFly/issues"
   },
-  "homepage": "https://github.com/ayoayco/McFly#readme"
+  "homepage": "https://github.com/ayoayco/McFly#readme",
+  "dependencies": {
+    "esprima": "^4.0.1",
+    "h3": "^1.8.2",
+    "nitropack": "^2.7.0",
+    "ultrahtml": "^1.5.2"
+  }
 }
diff --git a/packages/create-mcfly/package.json b/packages/create-mcfly/package.json
index a67df78..20b954f 100644
--- a/packages/create-mcfly/package.json
+++ b/packages/create-mcfly/package.json
@@ -1,6 +1,6 @@
 {
   "name": "create-mcfly",
-  "version": "0.0.4",
+  "version": "0.0.5",
   "bin": {
     "create-mcfly": "./index.js"
   },