XeroAntiCheat v1.0.8 bug fixes

- SpiderCheck: fixed Location mutation bug - bodyBlock was reading y-1 (same as feetBlock) and headBlock was reading y instead of y+1. Now uses block coordinates directly.
- ConfigManager: decay task no longer reads YamlConfiguration from background thread. decayRate is now volatile and refreshed on reload from main thread only.
- JesusCheck, SpeedCheck, NoFallCheck: loc.subtract() now uses .clone() to prevent silent Location mutation.
- VelocityCheck: decrementVelocityCheckTicks() moved past the minExpected threshold check to avoid consuming a tick on packets that are immediately discarded.

target/classes/config.yml

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+# XeroAntiCheat Configuration File
+# Version: 1.0.0
+# Target: Paper 1.21.x (compatible with 1.20-1.22)
+
+# ==========================================
+# GENERAL SETTINGS
+# ==========================================
+
+# Enable or disable the anti-cheat
+enabled: true
+
+# Enable debug mode (logs additional information)
+debug: false
+
+# Number of async threads for background tasks
+async_task_threads: 2
+
+# Database settings
+database:
+  # Set to false to disable SQLite logging (flat-file log always active)
+  enabled: true
+
+# ==========================================
+# VIOLATION SYSTEM
+# ==========================================
+
+violation:
+  # Time in seconds between violation level decay
+  decay_interval: 30
+  
+  # Amount to reduce VL by each decay interval
+  decay_rate: 0.5
+
+# ==========================================
+# CHECK CONFIGURATION
+# ==========================================
+
+# Movement Checks
+checks:
+  # ----------------------------------------
+  # SPEED CHECK
+  # Detects horizontal movement faster than possible
+  # ----------------------------------------
+  speed:
+    enabled: true
+    # Base maximum speed (blocks per tick)
+    max_speed: 0.56
+    # Ping compensation factor (scales latency leniency)
+    ping_factor: 1.0
+    # Number of ticks to buffer for rolling average
+    buffer_ticks: 5
+    # VL thresholds
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # FLY CHECK
+  # Detects flying without elytra/creative/spectator
+  # ----------------------------------------
+  fly:
+    enabled: true
+    # Number of ticks to allow for stepping/slabs
+    fall_buffer: 10
+    # Maximum ground desync ticks before flagging
+    ground_desync_threshold: 3
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # JESUS CHECK (NoWaterWalk)
+  # Detects walking on water without Frost Walker
+  # ----------------------------------------
+  jesus:
+    enabled: true
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # NOFALL CHECK
+  # Detects no fall damage after falling >3 blocks
+  # ----------------------------------------
+  nofall:
+    enabled: true
+    # Minimum fall distance to track
+    min_fall_distance: 3
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # TIMER CHECK (Blink/Packet Timer)
+  # Detects packet timing anomalies
+  # ----------------------------------------
+  timer:
+    enabled: true
+    # Maximum packets per second allowed
+    max_packets_per_second: 22
+    # Milliseconds of no packets before flagging blink
+    blink_threshold_ms: 500
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # SPIDER CHECK
+  # Detects climbing non-climbable blocks
+  # ----------------------------------------
+  spider:
+    enabled: true
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # GLIDE CHECK (ElytraHack)
+  # Detects glide-like movement without elytra
+  # ----------------------------------------
+  glide:
+    enabled: true
+    # Minimum horizontal speed for glide detection
+    min_horizontal_speed: 0.5
+    # Maximum Y decrease per tick for glide curve
+    max_y_decrease: 0.1
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # KILLAURA CHECK
+  # Detects impossible combat angles/rotations
+  # ----------------------------------------
+  killaura:
+    enabled: true
+    # Maximum angle in degrees from look direction
+    max_angle: 100
+    # Maximum rotation change between attacks
+    max_rotation_change: 45
+    # Window for multi-target detection (ms)
+    multitarget_window_ms: 100
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # REACH CHECK
+  # Detects attacking beyond reach
+  # ----------------------------------------
+  reach:
+    enabled: true
+    # Maximum reach in blocks (survival)
+    max_reach: 3.2
+    # Maximum reach in blocks (creative)
+    creative_max_reach: 5.0
+    # Ping compensation factor
+    ping_factor: 1.0
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # CRITICAL CHECK
+  # Detects critical hits without being airborne
+  # ----------------------------------------
+  critical:
+    enabled: true
+    # Allow legitimate jump-crits
+    allow_jump_crits: true
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # AUTOCLICKER CHECK
+  # Detects excessive CPS or perfect patterns
+  # ----------------------------------------
+  autoclicker:
+    enabled: true
+    # Maximum clicks per second
+    max_cps: 20
+    # Minimum variance (lower = more suspicious)
+    min_variance: 2.0
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # FASTPLACE CHECK
+  # Detects block placement too fast
+  # ----------------------------------------
+  fastplace:
+    enabled: true
+    # Maximum blocks per second
+    max_blocks_per_second: 20
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # PHASE CHECK
+  # Detects players clipping through solid blocks
+  # ----------------------------------------
+  phase:
+    enabled: true
+    # Minimum movement distance before ray-cast runs (blocks)
+    min_distance: 0.5
+    # Maximum movement delta — larger values are treated as teleports
+    max_distance: 5.0
+    warn_vl: 5
+    kick_vl: 15
+    tempban_vl: 30
+    permban_vl: 60
+
+  # ----------------------------------------
+  # VELOCITY CHECK
+  # Detects players ignoring server-sent knockback (requires ProtocolLib)
+  # ----------------------------------------
+  velocity:
+    enabled: true
+    # Minimum server-sent velocity magnitude to check
+    min_expected_velocity: 0.15
+    # Player must move at least 20% of expected knockback
+    min_displacement_ratio: 0.2
+    warn_vl: 8
+    kick_vl: 20
+    tempban_vl: 40
+    permban_vl: 80
+
+  # ----------------------------------------
+  # SCAFFOLD CHECK
+  # Detects automated scaffolding
+  # ----------------------------------------
+  scaffold:
+    enabled: true
+    # Minimum pitch angle for suspicious placement
+    min_pitch: 75
+    # Number of signals required to flag
+    signals_required: 2
+    # Signal 4: Max yaw change (degrees) between placements
+    rotation_lock_threshold: 2.0
+    # Signal 4: Min horizontal speed (blocks/tick) required
+    min_move_speed: 0.15
+    # Signal 5: StdDev below this triggers signal (too-perfect timing)
+    min_placement_variance_ms: 30.0
+    # Signal 5: Min blocks/sec before signal 5 is evaluated
+    min_bps_for_variance_check: 5
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # FASTEAT CHECK
+  # Detects eating faster than possible
+  # ----------------------------------------
+  fasteat:
+    enabled: true
+    # Maximum eating duration in ticks (32 = 1.6s)
+    max_eat_ticks: 32
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+  # ----------------------------------------
+  # INVENTORYMOVE CHECK
+  # Detects movement while inventory open
+  # ----------------------------------------
+  inventorymove:
+    enabled: true
+    warn_vl: 10
+    kick_vl: 25
+    tempban_vl: 50
+    permban_vl: 100
+
+# ==========================================
+# PUNISHMENT SETTINGS
+# ==========================================
+
+punishments:
+  # Commands to execute for each punishment level
+  # Use %player% for player name, %reason% for reason
+  kick_command: "kick %player% &c[XAC] Illegal activity detected"
+  tempban_command: "tempban %player% 30d %reason%"
+  permban_command: "ban %player% %reason%"
+
+  # Default reason for bans
+  default_reason: "[XeroAntiCheat] Suspicious activity"
+
+# ==========================================
+# ALERT SYSTEM
+# ==========================================
+
+alerts:
+  # Enable or disable alert broadcasts
+  enabled: true
+  
+  # Alert format (MiniMessage)
+  # Available placeholders: %player%, %check%, %vl%
+  format: "<dark_red>[<red>XAC<dark_red>] <white>%player% <red>failed <white>%check% <red>(VL: <white>%vl%<red>)"
+  
+  # Staff-only alert format
+  staff_format: "<gray>[%time%] %message%"
+
+# ==========================================
+# COMMANDS
+# ==========================================
+
+commands:
+  # Permission required for admin commands
+  reload_permission: "xac.admin"
+  # Permission to bypass all checks
+  bypass_permission: "xac.bypass"
+  # Permission to receive alerts
+  alerts_permission: "xac.alerts"
+
+# ==========================================
+# TPS COMPENSATION
+# ==========================================
+
+tps:
+  # Enable TPS-based threshold scaling
+  enabled: true
+  # Minimum TPS to apply compensation
+  min_tps_threshold: 18.0

target/classes/plugin.yml

@@ -0,0 +1,185 @@
+name: XeroAntiCheat
+version: 1.0.8
+main: com.xeroth.xeroanticheat.XeroAntiCheat
+author: Xeroth
+description: Lightweight, accurate anti-cheat for Paper 1.21.x
+api-version: 1.21
+softdepend:
+  - ProtocolLib
+
+commands:
+  xac:
+    description: XeroAntiCheat main command
+    usage: /xac <reload|status|punish|clearviolations|verbose|alerts|version>
+    permission: xac.command.version
+    aliases: [xeroanticheat, anticheat]
+
+permissions:
+
+  # ── Wildcards ────────────────────────────────────────────────────────────
+
+  xac.*:
+    description: Grants all XeroAntiCheat permissions including bypass
+    default: false
+    children:
+      xac.admin: true
+      xac.bypass: true
+
+  xac.admin:
+    description: Grants all staff commands and alert access (does NOT grant bypass)
+    default: op
+    children:
+      xac.command.reload: true
+      xac.command.status: true
+      xac.command.punish: true
+      xac.command.clearviolations: true
+      xac.command.verbose: true
+      xac.command.alerts: true
+      xac.command.version: true
+      xac.alerts: true
+
+  # ── Commands ─────────────────────────────────────────────────────────────
+
+  xac.command.reload:
+    description: Reload XAC configuration
+    default: op
+
+  xac.command.status:
+    description: View a player's violation levels and ping
+    default: op
+
+  xac.command.punish:
+    description: Manually trigger a punishment for a player
+    default: op
+
+  xac.command.clearviolations:
+    description: Clear all violation levels for a player
+    default: op
+
+  xac.command.verbose:
+    description: Toggle verbose per-flag output for a specific player
+    default: op
+
+  xac.command.alerts:
+    description: Toggle receiving anti-cheat alerts in chat
+    default: op
+
+  xac.command.version:
+    description: Show the plugin version
+    default: true
+
+  # ── Alerts ───────────────────────────────────────────────────────────────
+
+  xac.alerts:
+    description: Receive alerts for all checks
+    default: op
+    children:
+      xac.alerts.movement: true
+      xac.alerts.combat: true
+      xac.alerts.misc: true
+
+  xac.alerts.movement:
+    description: Receive alerts for movement checks only
+    default: false
+
+  xac.alerts.combat:
+    description: Receive alerts for combat checks only
+    default: false
+
+  xac.alerts.misc:
+    description: Receive alerts for misc checks only
+    default: false
+
+  # ── Bypass ───────────────────────────────────────────────────────────────
+
+  xac.bypass:
+    description: Bypass all anti-cheat checks
+    default: false
+    children:
+      xac.bypass.movement: true
+      xac.bypass.combat: true
+      xac.bypass.misc: true
+
+  xac.bypass.movement:
+    description: Bypass all movement checks
+    default: false
+    children:
+      xac.bypass.speed: true
+      xac.bypass.fly: true
+      xac.bypass.jesus: true
+      xac.bypass.nofall: true
+      xac.bypass.timer: true
+      xac.bypass.spider: true
+      xac.bypass.glide: true
+      xac.bypass.phase: true
+
+  xac.bypass.combat:
+    description: Bypass all combat checks
+    default: false
+    children:
+      xac.bypass.killaura: true
+      xac.bypass.reach: true
+      xac.bypass.critical: true
+      xac.bypass.autoclicker: true
+      xac.bypass.velocity: true
+
+  xac.bypass.misc:
+    description: Bypass all miscellaneous checks
+    default: false
+    children:
+      xac.bypass.fastplace: true
+      xac.bypass.scaffold: true
+      xac.bypass.fasteat: true
+      xac.bypass.inventorymove: true
+
+  xac.bypass.speed:
+    description: Bypass SpeedCheck
+    default: false
+  xac.bypass.fly:
+    description: Bypass FlyCheck
+    default: false
+  xac.bypass.jesus:
+    description: Bypass JesusCheck
+    default: false
+  xac.bypass.nofall:
+    description: Bypass NoFallCheck
+    default: false
+  xac.bypass.timer:
+    description: Bypass TimerCheck
+    default: false
+  xac.bypass.spider:
+    description: Bypass SpiderCheck
+    default: false
+  xac.bypass.glide:
+    description: Bypass GlideCheck
+    default: false
+  xac.bypass.phase:
+    description: Bypass PhaseCheck
+    default: false
+  xac.bypass.killaura:
+    description: Bypass KillAuraCheck
+    default: false
+  xac.bypass.reach:
+    description: Bypass ReachCheck
+    default: false
+  xac.bypass.critical:
+    description: Bypass CriticalCheck
+    default: false
+  xac.bypass.autoclicker:
+    description: Bypass AutoClickerCheck
+    default: false
+  xac.bypass.velocity:
+    description: Bypass VelocityCheck (requires ProtocolLib)
+    default: false
+  xac.bypass.fastplace:
+    description: Bypass FastPlaceCheck
+    default: false
+  xac.bypass.scaffold:
+    description: Bypass ScaffoldCheck
+    default: false
+  xac.bypass.fasteat:
+    description: Bypass FastEatCheck
+    default: false
+  xac.bypass.inventorymove:
+    description: Bypass InventoryMoveCheck
+    default: false

target/maven-archiver/pom.properties

@@ -0,0 +1,3 @@
+artifactId=xeroanticheat
+groupId=com.xeroth
+version=1.0.8

target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst

@@ -0,0 +1,37 @@
+com/xeroth/xeroanticheat/command/XACCommand$1Cmd.class
+com/xeroth/xeroanticheat/data/PlayerData$PositionSnapshot.class
+com/xeroth/xeroanticheat/check/Check.class
+com/xeroth/xeroanticheat/listener/CombatListener.class
+com/xeroth/xeroanticheat/XeroAntiCheat.class
+com/xeroth/xeroanticheat/data/PlayerData$RotationSnapshot.class
+com/xeroth/xeroanticheat/manager/DatabaseManager.class
+com/xeroth/xeroanticheat/checks/misc/ScaffoldCheck.class
+com/xeroth/xeroanticheat/protocol/PacketListener$2.class
+com/xeroth/xeroanticheat/command/XACCommand.class
+com/xeroth/xeroanticheat/manager/PunishmentManager.class
+com/xeroth/xeroanticheat/checks/combat/VelocityCheck.class
+com/xeroth/xeroanticheat/listener/MovementListener.class
+com/xeroth/xeroanticheat/checks/movement/SpiderCheck.class
+com/xeroth/xeroanticheat/checks/combat/AutoClickerCheck.class
+com/xeroth/xeroanticheat/checks/movement/PhaseCheck.class
+com/xeroth/xeroanticheat/protocol/PacketListener$1.class
+com/xeroth/xeroanticheat/manager/ViolationManager.class
+com/xeroth/xeroanticheat/checks/misc/FastEatCheck.class
+com/xeroth/xeroanticheat/checks/misc/InventoryMoveCheck.class
+com/xeroth/xeroanticheat/protocol/PacketListener.class
+com/xeroth/xeroanticheat/checks/movement/JesusCheck.class
+com/xeroth/xeroanticheat/manager/ConfigManager.class
+com/xeroth/xeroanticheat/checks/movement/SpeedCheck.class
+com/xeroth/xeroanticheat/checks/movement/GlideCheck.class
+com/xeroth/xeroanticheat/checks/movement/FlyCheck.class
+com/xeroth/xeroanticheat/data/PlayerData$VelocitySnapshot.class
+com/xeroth/xeroanticheat/manager/CheckManager.class
+com/xeroth/xeroanticheat/checks/movement/NoFallCheck.class
+com/xeroth/xeroanticheat/protocol/PacketListener$3.class
+com/xeroth/xeroanticheat/listener/MiscListener.class
+com/xeroth/xeroanticheat/data/PlayerData.class
+com/xeroth/xeroanticheat/checks/combat/ReachCheck.class
+com/xeroth/xeroanticheat/checks/misc/FastPlaceCheck.class
+com/xeroth/xeroanticheat/checks/movement/TimerCheck.class
+com/xeroth/xeroanticheat/checks/combat/CriticalCheck.class
+com/xeroth/xeroanticheat/checks/combat/KillAuraCheck.class

target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst

@@ -0,0 +1,30 @@
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/XeroAntiCheat.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/check/Check.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/combat/AutoClickerCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/combat/CriticalCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/combat/KillAuraCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/combat/ReachCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/combat/VelocityCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/misc/FastEatCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/misc/FastPlaceCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/misc/InventoryMoveCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/misc/ScaffoldCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/movement/FlyCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/movement/GlideCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/movement/JesusCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/movement/NoFallCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/movement/PhaseCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/movement/SpeedCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/movement/SpiderCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/checks/movement/TimerCheck.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/command/XACCommand.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/data/PlayerData.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/listener/CombatListener.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/listener/MiscListener.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/listener/MovementListener.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/manager/CheckManager.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/manager/ConfigManager.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/manager/DatabaseManager.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/manager/PunishmentManager.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/manager/ViolationManager.java
+/home/axel/Músicas/Java/src/main/java/com/xeroth/xeroanticheat/protocol/PacketListener.java