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Review follow-up: - A tone-map failure surfaced as a capture error, and the capture loop answers any DXGI error by switching the capturer to GDI for the rest of its life. The capturer now drops the tone-map, re-creates the duplication with the legacy DuplicateOutput (DXGI's clipped BGRA8, the pre-HDR behaviour) and returns WouldBlock, so the session stays on DXGI and simply fetches the next frame. - Only failures that cannot succeed anywhere in the process (no d3dcompiler_47.dll, shaders that do not compile) set the global UNAVAILABLE flag; D3D object creation failures stay with the capturer that hit them, so another adapter or a recreated capturer tries again. - D3DCompile is resolved once through a OnceLock instead of a LoadLibrary per capturer that was never freed. - The module doc now states what this pass is: normalization of an HDR desktop to SDR, with everything above SDR white clipping, not a tone map, and why a roll-off is deliberately not applied. The earlier claim that clipping matches what the local user sees was wrong for HDR content on an HDR display. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01RLb1dNdhFqUQExJPANjo1F