diff --git a/12_post-installation.md b/12_post-installation.md
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+# Post-Installation Guide (ZFS + BastilleBSD)
+
+_A complete, structured, and command-ready template for building a clean, maintainable FreeBSD 14.3 system_
+
+### 1. System Updates
+
+Bring the fresh installed FreeBSD to a known good state.
+
+``` sh
+freebsd-update fetch
+freebsd-update install
+pkg bootstrap
+pkg update
+pkg upgrade
+```