diff --git a/Cargo.toml b/Cargo.toml
index e3ee4d6..71cb425 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,9 +19,12 @@ async-trait = "0.1.80"
 axum = "0.7.5"
 chrono = { version = "0.4.38", features = ["serde"] }
 clap = { version = "4.5.8", features = ["derive", "env"] }
+derive_builder = "0.20.0"
 env_logger = "0.11.3"
+indexmap = "2.2.6"
 itertools = "0.13.0"
 log = "0.4.22"
+regex = "1.10.5"
 serde = "1.0.203"
 slug = "0.1.5"
 tokio = { version = "1.38.0", features = ["macros", "rt-multi-thread"] }
diff --git a/examples/hello-world/Cargo.toml b/examples/hello-world/Cargo.toml
index 1203b9a..05cdc2e 100644
--- a/examples/hello-world/Cargo.toml
+++ b/examples/hello-world/Cargo.toml
@@ -3,6 +3,8 @@ name = "example-hello-world"
 version = "0.1.0"
 publish = false
 description = "Hello World - Flareon example."
+edition = "2021"
 
 [dependencies]
 flareon = { path = "../../flareon" }
+tokio = { version = "1.38.0", features = ["macros", "rt-multi-thread"] }
diff --git a/examples/hello-world/src/main.rs b/examples/hello-world/src/main.rs
index f328e4d..e93476c 100644
--- a/examples/hello-world/src/main.rs
+++ b/examples/hello-world/src/main.rs
@@ -1 +1,27 @@
-fn main() {}
+use std::sync::Arc;
+
+use flareon::prelude::{
+    Body, Error, FlareonApp, FlareonProject, Request, Response, Route, StatusCode,
+};
+use flareon::View;
+
+fn return_hello(_app: &FlareonApp, _request: &Request) -> Result<Response, Error> {
+    Ok(Response::new_html(
+        StatusCode::OK,
+        Body::fixed("<h1>Hello Flareon!</h1>".as_bytes().to_vec()),
+    ))
+}
+
+#[tokio::main]
+async fn main() {
+    let app = FlareonApp::builder()
+        .urls([Route::new("/", Arc::new(Box::new(return_hello)))])
+        .build()
+        .unwrap();
+
+    let flareon_project = FlareonProject::builder().apps([app]).build().unwrap();
+
+    flareon::run(flareon_project, "127.0.0.1:8000")
+        .await
+        .unwrap();
+}
diff --git a/flareon/Cargo.toml b/flareon/Cargo.toml
index e20a072..64b8602 100644
--- a/flareon/Cargo.toml
+++ b/flareon/Cargo.toml
@@ -6,6 +6,10 @@ license.workspace = true
 description = "Modern web framework focused on speed and ease of use."
 
 [dependencies]
+async-trait.workspace = true
 axum.workspace = true
+derive_builder.workspace = true
+indexmap.workspace = true
+regex.workspace = true
 tokio.workspace = true
 tower.workspace = true
diff --git a/flareon/src/lib.rs b/flareon/src/lib.rs
index b93cf3f..d54308a 100644
--- a/flareon/src/lib.rs
+++ b/flareon/src/lib.rs
@@ -1,14 +1,141 @@
-pub fn add(left: u64, right: u64) -> u64 {
-    left + right
+pub mod prelude;
+
+use std::fmt::{Debug, Formatter};
+use std::io::Read;
+use std::rc::Rc;
+use std::sync::Arc;
+
+use async_trait::async_trait;
+use derive_builder::Builder;
+use indexmap::IndexMap;
+
+pub type StatusCode = axum::http::StatusCode;
+
+#[async_trait]
+pub trait View {
+    async fn get_response(&self, app: &FlareonApp, request: &Request) -> Result<Response, Error>;
+}
+
+#[async_trait]
+impl<T> View for T
+where
+    T: Fn(&FlareonApp, &Request) -> Result<Response, Error> + Send + Sync,
+{
+    async fn get_response(&self, app: &FlareonApp, request: &Request) -> Result<Response, Error> {
+        todo!()
+    }
 }
 
-#[cfg(test)]
-mod tests {
-    use super::*;
+#[derive(Clone, Debug, Builder)]
+#[builder(setter(into))]
+pub struct FlareonApp {
+    urls: Vec<Route>,
+}
 
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
+impl FlareonApp {
+    #[must_use]
+    pub fn builder() -> FlareonAppBuilder {
+        FlareonAppBuilder::default()
     }
 }
+
+#[derive(Clone)]
+pub struct Route {
+    url: String,
+    view: Arc<Box<dyn View>>,
+}
+
+impl Debug for Route {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        todo!()
+    }
+}
+
+impl Route {
+    #[must_use]
+    pub fn new<T: Into<String>>(url: T, view: Arc<Box<dyn View>>) -> Self {
+        Self {
+            url: url.into(),
+            view,
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct Request {}
+
+type HeadersMap = IndexMap<String, String>;
+
+#[derive(Debug)]
+pub struct Response {
+    status: StatusCode,
+    headers: HeadersMap,
+    body: Body,
+}
+
+const CONTENT_TYPE_HEADER: &str = "Content-Type";
+const HTML_CONTENT_TYPE: &str = "text/html";
+
+impl Response {
+    #[must_use]
+    pub fn new_html(status: StatusCode, body: Body) -> Self {
+        Self {
+            status,
+            headers: Self::html_headers(),
+            body,
+        }
+    }
+
+    #[must_use]
+    fn html_headers() -> HeadersMap {
+        let mut headers = HeadersMap::new();
+        headers.insert(CONTENT_TYPE_HEADER.to_owned(), HTML_CONTENT_TYPE.to_owned());
+        headers
+    }
+}
+
+pub enum Body {
+    NoContent,
+    Fixed(Vec<u8>),
+    Streaming(Box<dyn Read>),
+}
+
+impl Debug for Body {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        todo!()
+    }
+}
+
+impl Body {
+    #[must_use]
+    pub fn empty() -> Self {
+        Self::NoContent
+    }
+
+    #[must_use]
+    pub fn fixed(data: Vec<u8>) -> Self {
+        Self::Fixed(data)
+    }
+
+    // TODO streaming
+}
+
+#[derive(Debug)]
+pub struct Error {}
+
+#[derive(Clone, Default, Debug, Builder)]
+#[builder(setter(into))]
+pub struct FlareonProject {
+    apps: Vec<FlareonApp>,
+}
+
+impl FlareonProject {
+    #[must_use]
+    pub fn builder() -> FlareonProjectBuilder {
+        FlareonProjectBuilder::default()
+    }
+}
+
+pub async fn run(project: FlareonProject, address_str: &str) -> Result<(), Error> {
+    todo!()
+}
diff --git a/flareon/src/prelude.rs b/flareon/src/prelude.rs
new file mode 100644
index 0000000..4a21cf7
--- /dev/null
+++ b/flareon/src/prelude.rs
@@ -0,0 +1 @@
+pub use crate::{Body, Error, FlareonApp, FlareonProject, Request, Response, Route, StatusCode};