Spun off 2026-05-03 from the closed-without-patch
kwin_overlay_subsurface campaign (its phase8_handover.md is
the predecessor). The candidate research question is whether
running an X11 session on PineTab2 reproduces, eliminates, or
transforms the drop-inversion phenomenon that motivated the
predecessor — but the framing is provisional and awaits
operator confirmation before Phase 1 lock.
phase0_findings.md is the substrate doc:
- Predecessor close-out summary (three reasons no patch
landed; replicate-baseline-first lesson).
- What stays valid from the predecessor (Phase 1 scanout
archaeology, Phase 2-prime KWin Wayland source-read which
does NOT transfer to X11, Δ_present-46ms reproducible
side-finding which is directly testable under X11,
measurement infrastructure with WAYLAND_DEBUG-specific
parts that don't transfer).
- Current ohm state (carry-over predecessor tooling, governor
pin, baloo disabled, kwin-fourier still installed).
- Provisional research question with three plausible
outcomes (α/β/γ) and four alternate framings the operator
may have in mind that this question doesn't cover.
- Working-assumption out-of-scope list (no patches, no MRs,
no Δ_present chase yet).
- Four pre-question Phase 0 deliverables that are unblocked
regardless of framing: ohm state snapshot, X11-path
inventory, X11 measurement-tool inventory, A1
Wayland-baseline rep on this campaign's session for future
comparison anchor.
worklist.md tracks Phase 0 only. Phase 1 lock awaits the
research question. Discipline carry-overs from
kwin_overlay_subsurface listed (replicate baseline first;
phase discipline; non-upstreaming default; memory
persistence at close).
README.md status banner: Phase 0 in progress, research
question pending operator confirmation.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
