diff --git a/Panel/CHANGELOG.md b/Panel/CHANGELOG.md
index a735fedc..eaaf5e99 100644
--- a/Panel/CHANGELOG.md
+++ b/Panel/CHANGELOG.md
@@ -1,6 +1,7 @@
 # Changelog
 
 ## 2026-05-19
+- **Updater deployment layout enforcement + marker file writes:** Hardened `modules/administration/panel_update.php` to require the live `/var/www/html/GSP` root with explicit `/Panel` and `/Website` destinations, log full source/destination path detection (including temp checkout/source roots), stop on invalid mapping, copy Panel/Website via explicit subtree mapping (preventing nested `Panel/Panel` or `Website/Website`), validate key copied files after sync, and write both `Website/timestamp.txt` and `modules/billing/timestamp.txt` marker files on successful updates.
 - **Workshop content script path fix:** Updated addonsmanager default Workshop script paths to the panel module script location under `/var/www/html/GSP/Panel/modules/addonsmanager/scripts/workshop/` so Workshop actions no longer use the incorrect game-home-mixed path on the agent host.
 
 ## 2026-05-18
diff --git a/Panel/docs/COPILOT_TODO.md b/Panel/docs/COPILOT_TODO.md
index b8498d9d..e3b2e12b 100644
--- a/Panel/docs/COPILOT_TODO.md
+++ b/Panel/docs/COPILOT_TODO.md
@@ -21,3 +21,4 @@
 - Add Phase 2 Workshop Content UX in `addonsmanager`: browse/search/select Workshop items with metadata while reusing the Phase 1 per-home saved-ID action pipeline.
 - Add localized language strings/tooltips for the new cron scheduler `server_content_*` action labels across all supported panel locales.
 - Add a Game Manager "Live Server Status" panel that consumes `Panel/protocol/gsp_query.php` and shows banner preview plus copyable embed code.
+- Add an updater admin UI table that renders the full deployment preflight path map (temp checkout, source repo/panel/website, destination panel/website) directly from the new layout detection payload for one-click operator verification.