Own unpacked FileHandles until closure succeeds, deduplicate in-flight closure, and retain cleanup resources for retry without replacing the original read or identity failure. Attempt handle and snapshot cleanup independently and retain failed snapshots.
Consolidate unpacked admission, identity checking, cancellation and stream setup, removing the redundant same-handle stat. Cover stat and identity failures, post-stat cancellation, combined cleanup failure/retry, and stream completion/cancellation with real file descriptors.
Validation: 32 ASAR boundary tests, artifact extraction and SDK MCP consumers, check:fast. Native Windows descriptor inspection and real-provider workflows were not verified.
morluto
de0d341524