Re-verifies Phase 0 substrate against live system (post-reboot ampere
2 min uptime, backend md5 still matches hand-build, source clips
intact, memory list unchanged). Two missing tools flagged for Phase 4
to install (strace, firefox-fourier).
Catalogues 7 constraints (backend file pacman-owned but content-
unmanaged; kernel hand-managed; HEVC OOPS cascade; mpv --hwdec=vaapi
needs GL surface; mpv MPEG-2 not on default hwdec allow-list; reboot
authorization in scope; fresnel offline-able and not depended-on)
and 7 known failure modes (HEVC oops, broken CI backend silent fail,
hwdec SW fallback, MPEG-2 hwdec gate, firefox prefs version
sensitivity, RK3399 vaDeriveImage zero-page issue as open Q for
RK3588, pacman-Qo lying about file content).
Explicit non-deps section (HEVC/VP9/AV1, kdirect-on-RK3588, cross-host
byte-compare, DokuWiki) preempts scope creep doubts in Phase 3-7.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
