diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..4ff19a7
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,19 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "cogs_ast"
+version = "0.1.0"
+
+[[package]]
+name = "cogs_axum"
+version = "0.1.0"
+
+[[package]]
+name = "cogs_codegen"
+version = "0.1.0"
+
+[[package]]
+name = "cogs_parser"
+version = "0.1.0"
diff --git a/crates/ast/src/lib.rs b/crates/ast/src/lib.rs
index b93cf3f..90d2fd8 100644
--- a/crates/ast/src/lib.rs
+++ b/crates/ast/src/lib.rs
@@ -1,14 +1,24 @@
-pub fn add(left: u64, right: u64) -> u64 {
-    left + right
+pub struct Component {
+    pub elements: Vec<Element>,
 }
 
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
+pub enum Element {
+    Html(HtmlTag),
+    Block(CodeBlock),
+}
+
+pub struct HtmlTag {
+    pub tag: String,
+    pub attributes: Vec<Attribute>,
+    pub content: Vec<Element>,
+}
+
+pub struct Attribute {
+    pub name: String,
+    pub value: String,
+}
+
+pub struct CodeBlock {
+    pub is_async: bool,
+    pub content: String,
 }