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docs/features/WORKSHOP_SYSTEM.md

@@ -34,6 +34,22 @@ The dedicated module still provides:
 - monitor-button access from Game Monitor
 - per-game Workshop configuration files
 - uninstall and admin support pages
+- optional regex/config-file editing for games that need automatic mod-list updates
+- post-install-only workflows for games that only need a move/copy script
+
+## Legacy RPC Install Semantics
+
+The dedicated `steam_workshop` module still uses the legacy `steam_workshop` agent RPC for installs.
+
+Current rule:
+
+- if `config/filepath` is blank, the Panel passes a blank `config_file_path`
+- agents must skip the generated config-file editing block entirely
+- post-install scripts still run
+- `WorkshopModsInfo` still records installed items
+- uninstall can rely on `WorkshopModsInfo` when no config file is managed
+
+This keeps advanced regex editing available without forcing it for simple Arma/DayZ-style `@mod` installs.
 
 ## Main Limitations