AntiDupePro

[3.5.1] - 2026-07-08

Load fix for Paper 1.21.11.

Fixed

• Plugin failed to load on Paper 1.21.11. The shaded jar carried duplicate META-INF resources (Netty's io.netty.versions.properties and a BlockHound service file, both pulled in transitively by lettuce-core), which Paper's plugin remapper rejects with a "Duplicate entries detected" error. These redundant entries are now dropped from the jar — the server provides its own Netty at runtime — so the plugin loads normally again. Thanks to imSpartann for the report (#1).

[3.5.1] - 2026-07-08

Load fix for Paper 1.21.11.

Fixed

• Plugin failed to load on Paper 1.21.11. The shaded jar carried duplicate META-INF resources (Netty's io.netty.versions.properties and a BlockHound service file, both pulled in transitively by lettuce-core), which Paper's plugin remapper rejects with a "Duplicate entries detected" error. These redundant entries are now dropped from the jar — the server provides its own Netty at runtime — so the plugin loads normally again. Thanks to imSpartann for the report (#1).

3.5.0 - 2026-07-05

Includes auto-updating for when the next update releases.

Added

• Built-in update checking. AntiDupePro now checks Modrinth (with GitHub Releases as a fallback) for new versions and notifies admins. The new /adp update command adds check, download (fetch a new build, verify its checksum, back up the current jar, and stage it in the server's update folder to install on the next restart), restore (roll back), and status. Off by default beyond notifications — set update.mode to download or auto-stage in config.yml to enable installs. Works on Spigot too (notices fall back to plain text where clickable messages aren't available). Servers on the -mc26 build follow the mc26 release line automatically.

3.5.0 - 2026-07-05

Includes auto-updating for when the next update releases.

Added

• Built-in update checking. AntiDupePro now checks Modrinth (with GitHub Releases as a fallback) for new versions and notifies admins. The new /adp update command adds check, download (fetch a new build, verify its checksum, back up the current jar, and stage it in the server's update folder to install on the next restart), restore (roll back), and status. Off by default beyond notifications — set update.mode to download or auto-stage in config.yml to enable installs. Works on Spigot too (notices fall back to plain text where clickable messages aren't available). Servers on the -mc26 build follow the mc26 release line automatically.

[3.4.2] - 2026-07-02

Rename the tag, and optionally send clients nothing at all.

Added

• Rename the ownership tag. New ownership.namespace / ownership.key options change what the tag is called in item data — a leaked screenshot or stream frame then shows something bland like data:o instead of antidupepro:adp_owner, revealing nothing about which plugin wrote it. Renaming is safe: the previous name is remembered automatically (marker file plus ownership.legacy_keys), items tagged under the old name stay fully tracked, and they re-stamp onto the new name as they change hands. The client-side concealment hides old and new names alike during the transition.
• Strict strip mode. strip_all_custom_data: true strips every plugin's custom item data from packets sent to clients, not just AntiDupePro's tag — anything reaching the client is clean. Off by default because CIT resource packs and client mods that read item data (sorting helpers, price or tooltip overlays) will see stripped items as blank. Pair it with strip_whitelist to preserve the namespaces your pack or mods need — AntiDupePro's own namespace is never allowed on the whitelist and is ignored if listed.

[3.4.2] - 2026-07-02

Rename the tag, and optionally send clients nothing at all.

Added

• Rename the ownership tag. New ownership.namespace / ownership.key options change what the tag is called in item data — a leaked screenshot or stream frame then shows something bland like data:o instead of antidupepro:adp_owner, revealing nothing about which plugin wrote it. Renaming is safe: the previous name is remembered automatically (marker file plus ownership.legacy_keys), items tagged under the old name stay fully tracked, and they re-stamp onto the new name as they change hands. The client-side concealment hides old and new names alike during the transition.
• Strict strip mode. strip_all_custom_data: true strips every plugin's custom item data from packets sent to clients, not just AntiDupePro's tag — anything reaching the client is clean. Off by default because CIT resource packs and client mods that read item data (sorting helpers, price or tooltip overlays) will see stripped items as blank. Pair it with strip_whitelist to preserve the namespaces your pack or mods need — AntiDupePro's own namespace is never allowed on the whitelist and is ignored if listed.

[3.4.1] - 2026-06-30

Let trusted staff peek at the tag.

Added

• antidupe.tag.view permission. With hide_tag_from_clients on, the ownership tag is hidden from every player's client. Grant this node to an admin or group and their own client keeps the tag visible — handy for eyeballing it through an NBT-viewer mod without running /data get. Off by default, so concealment stays total until you grant it. Applies on next login. (Admins could already read the tag any time with /data get, which reads the untouched server-side data — this is purely about client-side visibility.)

[3.4.0] - 2026-06-30

Hide the tag, sharpen the witnesses, and split the keys.

Added

• Hide the ownership tag from players. New hide_tag_from_clients option (on by default). AntiDupePro strips its own tag from items in the packets sent to players, so anyone poking at item NBT with a client mod just sees nothing — they can't tell a tracked item from an untracked one, and the old "swap an item between two accounts to see the tag flip" trick stops working. The tag is untouched server-side, so detection is exactly as before. Only AntiDupePro's own data is hidden; other plugins' data and resource-pack item models are left alone.
• antidupe.witness.exempt permission. Anyone with this node is never counted as a nearby witness — handy for staff who patrol invisibly and shouldn't accidentally vouch for a player's actions.

Changed

• Vanished staff no longer count as witnesses. Proof of Witness now ignores vanished players (via the standard vanished flag that EssentialsX, SuperVanish and PremiumVanish all set). Previously an invisible admin standing nearby could quietly raise a duper's trust and hide the solo-farming pattern.
• Alerts and ledger commands are now separate permissions. Give a moderator antidupe.alerts to receive dupe alerts without command access, or antidupe.ledger for the /adp ledger commands. antidupe.admin still grants both, so existing setups are unchanged.

[3.4.1] - 2026-06-30

Let trusted staff peek at the tag.

Added

• antidupe.tag.view permission. With hide_tag_from_clients on, the ownership tag is hidden from every player's client. Grant this node to an admin or group and their own client keeps the tag visible — handy for eyeballing it through an NBT-viewer mod without running /data get. Off by default, so concealment stays total until you grant it. Applies on next login. (Admins could already read the tag any time with /data get, which reads the untouched server-side data — this is purely about client-side visibility.)

[3.4.0] - 2026-06-30

Hide the tag, sharpen the witnesses, and split the keys.

Added

• Hide the ownership tag from players. New hide_tag_from_clients option (on by default). AntiDupePro strips its own tag from items in the packets sent to players, so anyone poking at item NBT with a client mod just sees nothing — they can't tell a tracked item from an untracked one, and the old "swap an item between two accounts to see the tag flip" trick stops working. The tag is untouched server-side, so detection is exactly as before. Only AntiDupePro's own data is hidden; other plugins' data and resource-pack item models are left alone.
• antidupe.witness.exempt permission. Anyone with this node is never counted as a nearby witness — handy for staff who patrol invisibly and shouldn't accidentally vouch for a player's actions.

Changed

• Vanished staff no longer count as witnesses. Proof of Witness now ignores vanished players (via the standard vanished flag that EssentialsX, SuperVanish and PremiumVanish all set). Previously an invisible admin standing nearby could quietly raise a duper's trust and hide the solo-farming pattern.
• Alerts and ledger commands are now separate permissions. Give a moderator antidupe.alerts to receive dupe alerts without command access, or antidupe.ledger for the /adp ledger commands. antidupe.admin still grants both, so existing setups are unchanged.