Scope selection

backup, rollback, diff, and export accept a scope: the whole world by default, or per-dimension areas. Entries compose by union; --kind (repeatable, empty means all) applies to every area.

sekai --store ./sekai-store backup ./world --in overworld --kind region --kind entities
sekai --store ./sekai-store rollback ./world 3 --in overworld:0,0..31,31
sekai --store ./sekai-store diff 1 2 --in overworld:0,0
sekai --store ./sekai-store export 3 ./restored --region overworld:0,0

• --in DIM selects a whole dimension; --in DIM:x,z one chunk; --in DIM:x0,z0..x1,z1 an inclusive chunk rectangle.
• --region DIM:RX,RZ selects every chunk of one region file (rectangle shorthand).
• --kind selects region families (region, entities, poi).

The scope is a filter, not a partition: a scoped backup reads as the truth for its scope only (out-of-scope coordinates record nothing and resolve through fallback), and a scoped rollback or export never touches files outside the scope. See ADR-0003.