diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..34a89a8
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "char"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..f492639
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "char"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+color_eyre = { workspace = true }
+
+[workspace]
+members = ["crates/char_core"]
+
+[workspace.dependencies]
+color_eyre = "*"
diff --git a/crates/char_core/.gitignore b/crates/char_core/.gitignore
new file mode 100644
index 0000000..4fffb2f
--- /dev/null
+++ b/crates/char_core/.gitignore
@@ -0,0 +1,2 @@
+/target
+/Cargo.lock
diff --git a/crates/char_core/Cargo.toml b/crates/char_core/Cargo.toml
new file mode 100644
index 0000000..466e053
--- /dev/null
+++ b/crates/char_core/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "char_core"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/crates/char_core/src/lib.rs b/crates/char_core/src/lib.rs
new file mode 100644
index 0000000..7d12d9a
--- /dev/null
+++ b/crates/char_core/src/lib.rs
@@ -0,0 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}