Utility Nexus Admin

v0.0.0-beta.12 - Spiral pregen + scheduled burst window

Added

• Outward square spiral traversal. Chunk pregeneration now walks an Ulam-style spiral from the center instead of a raster from the corner, producing better early-game coverage around spawn. Progress persists as a single spiralIndex in pregen_progress.json; old raster progress files are discarded.
• Scheduled burst window ([schedule] config section). When schedule.enabled = true, pregeneration activates during a configurable daily hour window (default 08:00–10:00 local server time) in aggressive burst mode that bypasses MSPT throttle, work/rest cycle, and player-pause. On window close, progress is saved and a restart warning is emitted 3 times.
• schedule.burstChunksPerTick (64), schedule.burstMaxConcurrentChunks (16), schedule.burstMaxMillisPerTick (30), schedule.burstMaxServerMspt (500) — burst-specific throughput parameters.
• schedule.ignorePlayers (true) — generate even when players are online during burst.
• Pregeneration config is now server-only. [pregen] and [schedule] moved to a separate ModConfig.Type.SERVER file, utility_nexus/admin/pregen.toml. On a dedicated server it lives in <world>/serverconfig/; on an integrated (single-player) server it is not generated and pregen never auto-starts. The common config/utility_nexus/admin/config.toml keeps only [datapack], [commands], [logging].
• /una pregen status now shows burst mode and schedule status.

Changed

• pregen.radius semantics rewritten. 0 = disabled; -1 = infinite outward spiral; >0 = finite Chebyshev radius. The old INFINITE_RADIUS_FALLBACK (12,500) is removed.
• pregen.enabled default changed from true to false.
• pregen.chunksPerTick default changed from 50 to 8.
• /una pregen config radius now accepts -1 (infinite) and correctly labels 0 as disabled.

Breaking change: Old pregen_progress.json files (raster mode) are automatically discarded; pregeneration starts fresh from the center on first run after upgrade.

Reminder: Pregen no longer auto-starts by default. On a dedicated server, set pregen.enabled = true (and a real pregen.radius) in <world>/serverconfig/utility_nexus/admin/pregen.toml.