LeanCore

Changelog (1.7.0)

Added

• Content-aware zone dormancy: samples built-content density per zone (chests, benches, other block entities) and biases dormancy timers and eviction order toward keeping content-rich zones loaded longer, even when idle. On by default
• Hot/simulation radius governance: under heap pressure, trims the server-side ticking radius (separate from client view radius, so no view pop-in) to cut simulation cost on top of the existing view-radius trims. On by default, same grace window as the view-radius governor
• Per-chunk unload truth: engine chunk eviction is now counted exactly on the world thread instead of inferred from net loaded-chunk deltas, so the learning signal for a unload that stuck is far cleaner. On by default

Changed

• Per-world reads (hot zones, chunk-set diff, content scan) are batched into a single world-thread dispatch per tick, reducing dispatch overhead
• Hot-radius changes are now logged, so the ticking-radius governor reports its target the way the view-radius governor already does
• Learning persistence schema bumped to v9 (adds a per-zone content score); older v7 and v8 snapshots are read and upgraded automatically

Fixed

• Zone reuse stats are now immutable for safe cross-thread reads, false-cut counters are atomic, and the per-world chunk-set tracker no longer retains snapshots for worlds that went away
• Dormancy aging no longer advances its clock when a per-world fan-out only partially completes under load, so idle zones still cool on time
• Runtime shutdown is guarded against double execution, so a restart cannot run the save and teardown path twice
• World-thread tasks that throw are now logged instead of being silently swallowed
• Content-rich zones now persist even before they reach the normal visit threshold

Notes

• New LeanCore.json keys are added on first run: per-chunk unload truth, content model, and hot-radius governance default to on. Set them to false to keep 1.6.x behavior
• Existing LeanCore.json and learning.state.gz are kept and upgraded in place; no manual migration