Describe the feature
Add a new item tag modularrouters:player_blacklist that prevents the Player Module from extracting or inserting items matching the tag. This would work similarly to the existing modularrouters:activator_blacklist tag introduced in 13.2.4, but applied to Player Module transfers instead of Activator Module usage.
Behavior:
- When the Player Module attempts to pull/push an ItemStack from/to a player's inventory, it would skip any item tagged
modularrouters:player_blacklist.
- The tag would be empty by default, letting modpack makers and server admins populate it via datapacks or KubeJS.
- No change to the existing per-module whitelist/blacklist filter GUI. This is strictly an additional global safety net.
Reasons why it should be considered
Some modded items maintain mutable state in their NBT while a server-side GUI is open. For instance, chisel-type tools that temporarily hold an item in a container slot until the GUI is closed. When the Player Module extracts such an item while its GUI is still open client-side, the full ItemStack (including its pending NBT payload) is copied into the router's buffer before the GUI commits its changes, enabling a reliable duplication exploit.
A tag-based blacklist would let modpack authors ship a safe default with minimal effort, matching the precedent already set by activator_blacklist (which was added for similar reasons. The Acceleration Wand being a server-killer). The implementation pattern is effectively the same.
Additional details
Precedent: modularrouters:activator_blacklist added in 13.2.4 (Changelog).
Context: this issue is currently being actively reported in large modpacks. Example from an old post from All The Mods 10 and new modpack All The Mons 10:
Describe the feature
Add a new item tag
modularrouters:player_blacklistthat prevents the Player Module from extracting or inserting items matching the tag. This would work similarly to the existingmodularrouters:activator_blacklisttag introduced in 13.2.4, but applied to Player Module transfers instead of Activator Module usage.Behavior:
modularrouters:player_blacklist.Reasons why it should be considered
Some modded items maintain mutable state in their NBT while a server-side GUI is open. For instance, chisel-type tools that temporarily hold an item in a container slot until the GUI is closed. When the Player Module extracts such an item while its GUI is still open client-side, the full ItemStack (including its pending NBT payload) is copied into the router's buffer before the GUI commits its changes, enabling a reliable duplication exploit.
A tag-based blacklist would let modpack authors ship a safe default with minimal effort, matching the precedent already set by
activator_blacklist(which was added for similar reasons. The Acceleration Wand being a server-killer). The implementation pattern is effectively the same.Additional details
Precedent:
modularrouters:activator_blacklistadded in 13.2.4 (Changelog).Context: this issue is currently being actively reported in large modpacks. Example from an old post from All The Mods 10 and new modpack All The Mons 10: