AtlasSpigot 26.2 - build 15 (aggressive tuning tier)

Config update for Minecraft 26.2. The server jar is unchanged from build 14 — this release ships the retuned configuration.

What changed

atlas-global.yml was already exhausted: every remaining Leaf toggle is @Experimental, carries an upstream incompatibility warning, or is blocked on an open issue. This build goes past the "no visible behaviour change" line that earlier releases held to.

These settings change how the game behaves. That is deliberate, and worth reading before you install.

• Entity activation ranges cut — animals 32→16, monsters 32→24, raiders 64→48, misc/water 16→8, villagers 32→16, flying 32→24. The biggest single win available, and the biggest tradeoff: distant mobs stop ticking until a player is closer, and slower farms will notice. wake-up-inactive still revives frozen mobs in batches.
• Tracking ranges trimmed for animals, monsters, misc and other. players (48) and display (64) are untouched — shrinking the player range hurts PvP visibility, and hologram plugins use display entities.
• treasure-maps.find-already-discovered.villager-trade — removes the multi-second freeze when a cartographer trades a map.
• update-pathfinding-on-block-update off — large win in redstone-heavy areas.
• max-entity-collisions 8→2, chest cat detection off, arrows despawn in 3s, armor-stand collision lookups off, per-chunk save caps on projectiles and XP orbs, item merge radius 2.5→3.5, mob-spawn-range 8→6.
• -XX:+PerfDisableSharedMem added to start.sh — part of Aikar's published set and previously missing. Costs nothing in gameplay; jps/jstat can no longer discover the JVM by its shared-memory file.

Deliberately not enabled

hopper.disable-move-event is the biggest remaining win and stays off: it stops firing InventoryMoveItemEvent, which shop, economy and sorting plugins rely on. Also held: nerf-spawner-mobs, armor-stands.tick, and increase-time-statistics. Reasoning for each is in NOTES.md.

Verified

Boots clean in 8.90s through start.sh with the full config. spigot.yml returns byte-identical after the server writes it back, and every changed value was confirmed still in place.

Not benchmarked. This tier should be a solid improvement, but no measurements have been taken on 26.2, so no figures are claimed.

Installing

Download both files. Drop the jar in your server folder, then copy the contents of the config zip alongside it. Set eula=true, then run ./start.sh.