diff --git a/swarmmetrics.py b/swarmmetrics.py
index 6c70641..32084a6 100644
--- a/swarmmetrics.py
+++ b/swarmmetrics.py
@@ -520,3 +520,44 @@ if __name__ == "__main__":
         shadow = " [SHADOW]" if ns.is_shadow else ""
         print(f"  {nid}: echo={ns.echo_coefficient:.4f}, "
               f"sent={ns.total_sent}, recv={ns.total_received}{shadow}")
+
+
+# ── Agent-alias merging ──────────────────────────────────
+# Agents that change names mid-corpus create phantom signals
+# in temporal analysis. merge_aliases() canonicalizes from_id/to_id
+# before scoring, collapsing identity evolution into a single node.
+
+def merge_aliases(messages: list, alias_map: dict) -> list:
+    """Merge agent aliases in a message corpus.
+
+    alias_map: {old_name: canonical_name, ...}
+    Returns new list with from_id/to_id replaced by canonical names.
+
+    Example:
+        alias_map = {
+            'petrovich': 'petrovich-codex',
+            'hausmaster': 'φ-hausmaster',
+            'konstantин': 'кот-констант',
+            'кот-константин': 'кот-констант',
+        }
+        merged = merge_aliases(messages, alias_map)
+    """
+    merged = []
+    for m in messages:
+        m2 = m.copy()
+        m2['from_id'] = alias_map.get(m2.get('from_id', ''), m2.get('from_id', ''))
+        m2['to_id'] = alias_map.get(m2.get('to_id', ''), m2.get('to_id', ''))
+        merged.append(m2)
+    return merged
+
+
+# Default alias map for the OMPU bus corpus
+OMPU_BUS_ALIASES = {
+    'petrovich': 'petrovich-codex',
+    'hausmaster': 'φ-hausmaster',
+    'phi': 'φ-hausmaster',
+    'phi_hausmaster': 'φ-hausmaster',
+    'phi-hausmaster': 'φ-hausmaster',
+    'константин': 'кот-констант',
+    'кот-константин': 'кот-констант',
+}