diff --git a/evolution/tirith_hardener.py b/evolution/tirith_hardener.py
new file mode 100644
index 0000000..d711562
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+++ b/evolution/tirith_hardener.py
@@ -0,0 +1,4 @@
+"""Phase 12: Tirith Hardening.
+Infrastructure security for The Nexus.
+"""
+# ... (code)