Add the durable per-frame visibility probe apparatus that #103 lacked, so
the Phase U portal-visibility builder can be validated on live frames before
any GL/visual work.
EmitVis(rootCellId, visibleCells, outsidePolyCount, outsidePlaneCount,
perCellPlaneCounts, scissorFallbacks) prints ONE concise [vis] line gated on
root-cell CHANGE (private _lastVisRootCellId tracker; no-op when the root is
unchanged or ProbeVisibilityEnabled is false — one bool compare per frame when
off). Line format:
[vis] root=0x… cells=N ids=[…] outside(polys=…,planes=…) percell=[0x…:N,…] fallbacks=…
Reuses the existing Phase A8 ProbeVisibilityEnabled flag (env ACDREAM_PROBE_VIS,
already DebugPanel-mirrored via DebugVM.ProbeVisibility) rather than adding a
parallel owner — Code Structure Rule 5 (one diagnostic owner per subsystem).
Property doc repurposed from the abandoned A8 two-pipe stencil semantics to the
Phase U unified pipeline.
Decoupling note: RenderingDiagnostics lives in AcDream.Core, which must not
reference AcDream.App (Code Structure Rule 2). The plan's EmitVis signature took
an App-layer CellView; this lands the equivalent as pre-computed primitives
(outsidePolyCount + outsidePlaneCount) so the owner stays in Core. The U.4a call
site supplies OutsideView.Polygons.Count and the OutsideView ClipPlaneSet.Count.
TDD: 3 new tests in RenderingDiagnosticsVisibilityTests (no-op when disabled,
fires-once-per-new-root + suppressed-on-unchanged, env-default contract), each
self-contained via internal ResetVisibilityProbeForTests + Console.Out capture
to avoid the documented static-leak flakiness. Core suite +3 tests, no new
failures (flaky physics/input static-leak set unchanged at 16, untouched area).
Courtesy: removed the dangling RenderInsideOutAcdream comment reference (deleted
in U.1) + the AcDream.App.Rendering.Wb doc cref (a Core→App layer inversion).
The emit SITE wiring (per-frame call from the render loop) lands in U.4a; this
task lands only the owner members + formatter + test. GameWindow untouched.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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