Module planning 

Structs

CompactionPickFinished 🔒

Pure planning completion sent back to the owning region worker.

CompactionRequest

Region compaction request.

PreparedCompaction 🔒

Enums

CompactionPlanningResult 🔒

Result returned to the worker after background compaction planning.

Functions

pick_automatic 🔒

Scheduler policy applied between stateless discovery and semantic closure. Runs on the planning runtime with a private history snapshot, never on the worker or through a shared mutex. Stale results cannot mutate resident state.

refresh_picker_output 🔒

Rebuilds picker output with current SST handles while preserving the picker’s grouping.