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AntiFly

LOGO

Lightweight Paper + Fabric flight-control plugin by CevAPI.

AntiFly is not a full anti-cheat. It focuses on flight and movement abuse with layered checks:

server-authorized flight state
server-side ground/support truth
buffered air/hover/anti-kick suspicion
disciplined setbacks to last known valid support
Elytra-specific movement and boost sanity checks

Platforms

Paper: 1.21.x -> 26.1.2
Fabric: 1.21.11 -> 26.1.2 (Fabric Loader 0.18.1+, Fabric API 0.141.1+1.21.11)

Commands

Paper

Requires op or antifly.admin.

Core:

/antifly enable
/antifly disable
/antifly status
/antifly help
/antifly exempt <player>
/antifly unexempt <player>
/antifly set
/antifly set <key>
/antifly set <key> <value>
/antifly reset <player>

Alerts:

/antifly alerts <off|game|console|both>
game alerts go to ops and users with antifly.alerts

Debug:

/antifly debug on
/antifly debug off
/antifly debug
Shows live action-bar telemetry (mode, speed vs limits, key buffers)

Fabric

Requires moderator-level command permission.

/antifly command family is available with equivalent core controls.

Primary settings keys (Paper)

groundWalkMax
groundMountedMax
waterMax
waterVerticalMax
maxAirHorizontal
maxAirVertical
bufferDecay
horizontalBufferLimit
verticalBufferLimit
hoverBufferLimit
noFallDetectionEnabled
airNonFallTicksLimit
antiKickWindowTicks
antiKickMinDescent
setbackCooldownMs
elytraEnabled
elytraBoostGraceTicks
elytraStallTicks
elytraMovementBufferLimit
elytraDurabilityCheckEnabled
elytraMaxRocketHorizontal
elytraMaxRocketUp
elytraNoRocketSustainableHorizontal
elytraMaxNoRocketUp

Legacy aliases kept for backward compatibility:

groundSpeed, groundSpeedWalking, groundSpeedMounted
waterSpeed, waterVertical
airSpeed, airVertical, airNonFallTicks
elytraMovementLimit

Notes on Elytra

Rocket-assisted glide is tracked separately from no-rocket glide.
No-rocket controlled upward/flat cruise behavior is treated as suspicious and can be blocked.
Rare fluid-exit and early-glide pull-up transitions are given short grace windows to reduce false positives.

Permissions (Paper)

antifly.admin (default: op)
antifly.alerts (default: op)

Config locations

Paper: plugins/AntiFly/config.yml
Fabric: config/antifly.json