Reject symlink and reparse boundaries before internal ZIP or JVM outputs are opened, track opened, committed, partial, removed output lifecycle events, and convert output callback failures into controlled extractor failures without poisoning the JVM daemon. Gate legacy recovery behind an atomically created package-generation owner marker and keep unmarked reused or shared directories fail closed. Parse native RAR output from strictly verified locale-independent candidates while retaining ambiguous rename rejection.
Replace package staging assumptions with validated per-generation output records for internal ZIP and both JVM backends. Persist resume v2 using relative archive identities, complete member fingerprints, and concrete verified outputs so basename collisions, changed members, missing outputs, and unknown versions fail closed.
Launch the verified NSIS installer directly before application shutdown, wait for Windows to confirm process creation, and keep the application open on spawn failure. Move process waiting into NSIS with a bounded graceful and post-force termination check, and cover the handoff with updater regression tests.