diff --git a/poc-memory/src/agents/defs.rs b/poc-memory/src/agents/defs.rs
index 069bd89..1979a77 100644
--- a/poc-memory/src/agents/defs.rs
+++ b/poc-memory/src/agents/defs.rs
@@ -268,9 +268,12 @@ fn resolve(
         "siblings" | "neighborhood" => {
             let mut out = String::new();
             let mut all_keys: Vec<String> = Vec::new();
+            let mut included_nodes: std::collections::HashSet<String> = std::collections::HashSet::new();
             const MAX_NEIGHBORS: usize = 25;
 
             for key in keys {
+                if included_nodes.contains(key) { continue; }
+                included_nodes.insert(key.clone());
                 let Some(node) = store.nodes.get(key.as_str()) else { continue };
                 let neighbors = graph.neighbors(key);
 
@@ -325,6 +328,8 @@ fn resolve(
                     let mut budget_exceeded = false;
 
                     for (nbr, strength, _score) in &included {
+                        if included_nodes.contains(nbr) { continue; }
+                        included_nodes.insert(nbr.clone());
                         if let Some(n) = store.nodes.get(nbr.as_str()) {
                             if budget_exceeded || out.len() > NEIGHBORHOOD_BUDGET {
                                 // Header-only: key + first non-empty line