SentinelCore - AntyCheat

SentinelCore — Client Brand Detection

Added

• New Client Brand Detection module (ClientBrandTracker) that identifies a connecting player's client brand (Vanilla, Fabric, Forge, Lunar, Badlion, etc.) via Paper's getClientBrandName() API with a manual minecraft:brand / legacy MC|Brand plugin-channel decode as a fallback for non-Paper builds.
• Brand-spoof detection: if a client reports "vanilla" but has Forge/Fabric/Quilt handshake channels - or channels associated with known cheat/utility clients - open, the player is flagged with a BrandSpoofWarning.
• /ac profile <player> now shows a formatted, colour-coded client brand line, including a SPOOF? tag when a mismatch is detected.
• PlayerProfile#getClientBrand() / isBrandSpoofWarning() exposed for use by other detection modules.

Notes

• Detection relies on the client's own channel registration handshake and self-reported brand string, both of which a sufficiently modified client can still forge - this module raises suspicion, it does not provide certainty.