whoami
Deep technical notes on operating systems, virtualization, cloud infrastructure, kernels, filesystems, emulation, and the history behind essential tools.
Interpret CycloneDX VEX with scoped component references, accurate analysis states, justified conclusions, authenticated evidence, and fail-closed policy.
Build artifact policy around in-toto Statement v1: digest-bound subjects, authenticated payloads, predicate typing, authorized signers, and negative tests.
Operate OCI 1.1 referrers with repository-scoped discovery, correct empty and fallback handling, pagination, artifact filters, and verified graph promotion.
Design a TUF update client with authenticated bootstrap roots, threshold key rotation, snapshot bindings, expiry and rollback checks, and bounded recovery.
Understand DOS EXEC overlay loading through FreeDOS source: destination memory, MZ relocation factors, unchanged process context, entry contracts, and testing.
Understand FreeCOM's positional-argument window, reversible SHIFT DOWN extension, termination tests, and safe diagnostics for multi-argument DOS batch jobs.
Use DOS's handle-based file-time API with correct CX/DX ordering, checked carry flags, write-before-set sequencing, and close/reopen verification on FreeDOS.
Use FreeDOS INT 21h NLS services correctly, separating uppercase conversion, filename rules, collation data, pointer ownership, and code-page assumptions.
Diagnose FreeBSD file flags independently of permissions, test owner-level immutable protection, and recover narrowly without clearing unrelated policy.
Rotate persistent FreeBSD GELI user keys with explicit slot selection, offline attach tests, protected metadata backups, and realistic revocation boundaries.
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