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new file mode 100644
index 0000000..4ef4ed1
--- /dev/null
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diff --git a/Cargo.toml b/Cargo.toml
index 4c0ba7b..3c2a510 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,3 +5,5 @@ edition = "2024"
 license = "MIT"
 
 [dependencies]
+anyhow = "1.0.98"
+rustyline = "16.0.0"
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..944b4bd 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,19 @@
-fn main() {
-    println!("Hello, world!");
+use rustyline::error::ReadlineError;
+
+fn main() -> anyhow::Result<()> {
+    let mut rl = rustyline::DefaultEditor::new()?;
+    loop {
+        match rl.readline("> ") {
+            Ok(line) => {
+                eval(&line);
+                rl.add_history_entry(line)?;
+            }
+            Err(ReadlineError::Eof) | Err(ReadlineError::Interrupted) => break Ok(()),
+            Err(e) => break Err(e.into()),
+        }
+    }
+}
+
+fn eval(input: &str) {
+    println!("{input}");
 }