diff --git a/src/capnp_store.rs b/src/capnp_store.rs
index 3761571..84042b2 100644
--- a/src/capnp_store.rs
+++ b/src/capnp_store.rs
@@ -679,7 +679,7 @@ impl Store {
     }
 
     pub fn mark_used(&mut self, key: &str) {
-        if let Some(node) = self.nodes.get_mut(key) {
+        let updated = if let Some(node) = self.nodes.get_mut(key) {
             node.uses += 1;
             node.weight = (node.weight + self.params.use_boost as f32).min(1.0);
             // Reset spaced repetition — used successfully, move up interval
@@ -689,15 +689,29 @@ impl Store {
                 };
             }
             node.last_replayed = now_epoch();
+            node.version += 1;
+            Some(node.clone())
+        } else {
+            None
+        };
+        if let Some(node) = updated {
+            let _ = self.append_nodes(&[node]);
         }
     }
 
     pub fn mark_wrong(&mut self, key: &str, _ctx: Option<&str>) {
-        if let Some(node) = self.nodes.get_mut(key) {
+        let updated = if let Some(node) = self.nodes.get_mut(key) {
             node.wrongs += 1;
             node.weight = (node.weight - 0.1).max(0.0);
             // Reset spaced repetition interval — needs review
             node.spaced_repetition_interval = 1;
+            node.version += 1;
+            Some(node.clone())
+        } else {
+            None
+        };
+        if let Some(node) = updated {
+            let _ = self.append_nodes(&[node]);
         }
     }
 
@@ -737,6 +751,7 @@ impl Store {
         for (key, node) in &mut self.nodes {
             let factor = node.category.decay_factor(base) as f32;
             node.weight *= factor;
+            node.version += 1;
             decayed += 1;
             if node.weight < threshold {
                 to_remove.push(key.clone());
@@ -752,6 +767,10 @@ impl Store {
             }
         }
 
+        // Persist all decayed weights to capnp log
+        let updated: Vec<Node> = self.nodes.values().cloned().collect();
+        let _ = self.append_nodes(&updated);
+
         (decayed, pruned)
     }