diff --git a/pumpkin-world/src/lib.rs b/pumpkin-world/src/lib.rs
index 56462faf8..bad06b925 100644
--- a/pumpkin-world/src/lib.rs
+++ b/pumpkin-world/src/lib.rs
@@ -10,6 +10,7 @@ pub mod item;
 mod level;
 pub mod radial_chunk_iterator;
 pub mod vector3;
+mod world_gen;
 
 pub const WORLD_HEIGHT: usize = 384;
 pub const WORLD_LOWEST_Y: i16 = -64;
diff --git a/pumpkin-world/src/world_gen/mod.rs b/pumpkin-world/src/world_gen/mod.rs
new file mode 100644
index 000000000..1db8d3c21
--- /dev/null
+++ b/pumpkin-world/src/world_gen/mod.rs
@@ -0,0 +1 @@
+mod seed;
diff --git a/pumpkin-world/src/world_gen/seed.rs b/pumpkin-world/src/world_gen/seed.rs
new file mode 100644
index 000000000..a3245c2b6
--- /dev/null
+++ b/pumpkin-world/src/world_gen/seed.rs
@@ -0,0 +1,16 @@
+use std::hash::{DefaultHasher, Hash, Hasher};
+
+#[allow(dead_code)]
+#[derive(Clone, Copy)]
+pub struct Seed(pub i64);
+
+impl From<&str> for Seed {
+    fn from(value: &str) -> Self {
+        // TODO replace with a deterministic hasher (the same as vanilla?)
+        let mut hasher = DefaultHasher::new();
+        value.hash(&mut hasher);
+
+        // TODO use cast_signed once the feature is stabilized.
+        Self(hasher.finish() as i64)
+    }
+}