ShadowAC 2.0 – Major Check System Rewrite
This update introduces a full rewrite of ShadowAC’s check configuration system, improving accuracy, flexibility, and long-term stability across all server types.

While the total number of checks remains 115, nearly every category has been rebalanced, expanded, or refined.

High-Level Comparison
Area Old Configuration New Configuration
Check Structure Basic enable/disable Weighted & categorized
False Positive Control Limited Violation decay + weights
Detection Depth Single-layer checks Multi-layer detection
Packet Handling Minimal Dedicated packet category
Ghost Client Detection Not isolated Dedicated system
Server Types One-size-fits-all Preset-based tuning
Performance Mostly sync Async-capable checks
Staff Control Basic alerts GUI, alerts, ghost analysis
Movement Checks – Improved Accuracy
Old

• Basic Fly, Speed, NoFall checks
  
  
• Limited separation between motion types
  
  
• Higher chance of false positives on lag
  

New
✔ Split Fly checks (basic, advanced, packet-based)
✔ Speed checks separated into horizontal, vertical, sprint & sneak
✔ Added Elytra acceleration detection
✔ Added GroundSpoof & Motion manipulation checks
✔ Timer abuse split into game timer & packet timer
✔ Better handling of vehicles, boats, ice & liquid movement

Result:
More precise movement detection with significantly fewer false flags.

⚔️ Combat Checks – Multi-Layer Rewrite
Old

• Single KillAura & Reach checks
  
  
• CPS-only AutoClicker detection
  
  
• Limited aim analysis
  

New
✔ KillAura split into 5 independent layers
✔ Reach separated into entity & block reach
✔ AutoClicker expanded to CPS, pattern & statistical analysis
✔ AimAssist now checks smoothness, snap & consistency
✔ Added Backtrack detection
✔ Improved velocity & knockback handling

Result:
ShadowAC now detects legit-style combat cheats instead of only blatant ones.

Block Checks – Expanded Exploit Coverage
Old

• Basic Scaffold, Nuker & FastBreak
  
  
• Limited placement validation
  

New
✔ Scaffold split into tower, angle & speed checks
✔ Added ImpossiblePlace & AirPlace detection
✔ Added BlockReach manipulation
✔ Improved XRay with statistical + pattern analysis
✔ Added AutoBridge, AutoTool & SpeedMine detection

Result:
Better coverage for modern client scaffolds and nukers.

Player Checks – Quality-of-Life Detection
Old

• Limited player behavior checks
  
  
• No packet-level player analysis
  

New
✔ Added AutoArmor, AutoEat & InventoryMove
✔ Added SkinBlink & PingSpoofer detection
✔ Improved ChestStealer reliability
✔ Added AutoRespawn & FastThrow checks

Result:
ShadowAC now catches utility cheats commonly missed by older AntiCheats.

Packet Checks – Entirely New Category (ProtocolLib)
Old

• No dedicated packet analysis
  

New
✔ 15 dedicated packet checks
✔ BadPackets split into movement, action & rotation
✔ Packet spam & flooding protection
✔ Payload exploit detection
✔ Transaction & keep-alive abuse checks
✔ Packet order, delay & duplication detection

Result:
Protection against packet-level exploits and ghost clients.

Ghost Client Detection – New System
Old

• No ghost client identification
  

New
✔ Behavioral scoring system
✔ Analysis over time instead of instant flags
✔ Separate ghost alert permissions
✔ Designed for “legit” cheat detection

Result:
ShadowAC can now identify low-profile cheating clients.

⚙️ Punishments & Configuration Improvements
Old

• Static thresholds
  
  
• Limited customization
  

New
✔ Weighted violation system
✔ Automatic violation decay
✔ Per-check max violations
✔ Per-check severity weighting
✔ Fully configurable punishments
✔ LiteBans integration

Result:
Admins have full control over how and when punishments occur.

⚡ Performance Improvements
✔ Async-capable checks
✔ Cached player data
✔ Reduced main-thread load
✔ Better scalability for larger servers


We were getting lots of false positives so now we try to limit those but we recommend you disable the spider check in /shadowac gui