Centralize completed file observations and cleanup error projection across stable-file providers while preserving each provider’s failure classification and exact cleanup leases. Cover BEAM finalization cancellation and devicetree cleanup retries.
Validated 223 focused lifecycle and MCP tests and check:fast.
Retain exact completed file path, digest and length in Python pyc and Erlang BEAM failure observations. Translate Python close failures at the provider boundary and bind them to the retained descriptor cleanup leases so later successful retries resolve prior errors.
Exercise actual services and file handles with completed reads, cancellation during finalization and physical read failure followed by cancellation. Assert no fabricated snapshot on early failure and resolution of every prior cleanup report.
Validation: six focused descriptor regressions plus existing filesystem, parser and MCP coverage passed; build and static checks passed. Authored format fixtures establish portable reader behavior, not CPython/Erlang runtime execution.
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