diff --git a/crates/fidc-core/src/signal_contract.rs b/crates/fidc-core/src/signal_contract.rs
index 1e30f1e..b9ff37f 100644
--- a/crates/fidc-core/src/signal_contract.rs
+++ b/crates/fidc-core/src/signal_contract.rs
@@ -275,6 +275,7 @@ impl ValidatedSignalBook {
     }
 
     pub fn version_sha256(&self) -> &str { &self.book.version_sha256 }
+    pub fn generator_sha256(&self) -> &str { &self.book.generator_sha256 }
 
     pub fn decision_dates(&self) -> BTreeSet<NaiveDate> {
         self.index.keys().map(|value| value.date()).collect()