[kixelated]

Follow-ups from #59, picked by the maintainer through /quest-plan on 2026-11-05.

• [S] One Vulkan loader for the studio and CEF: stop copying CEF's libvulkan.so.1 beside the binaries, so NixOS builds and tests find the GPU without VK_DRIVER_FILES.
• [S] Browser sources on the GPU under X11 on NVIDIA: find why CEF has no GBM device under X11 on NVIDIA and fix it. Otherwise detect it at startup and take the CPU path, with a note in Health.

Decisions

• Vulkan: ✅ m0 quest, don't ship CEF's loader; m0 quest, dev shell sets VK_DRIVER_FILES; skip.
• X11 on NVIDIA: ✅ m0 quest, fix GBM and fail loud; m0 quest, CPU fallback only; skip.
• Milestone: ✅ m0, by the fixes rule; m1.

Review

• Round 1 (Codex gpt-6.1-sol, medium) on 1a34ee3: no findings.

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(Written by Claude Opus 5.5)

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Reviewing files that changed from the base of the PR and between c6b1fb7 and 1a34ee3.

Files selected for processing: 3

• quest/m0/README.md
• quest/m0/cef-vulkan-loader.md
• quest/m0/cef-x11-nvidia.md

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[kixelated]

Automated review by review (OpenAI)

Reviewed head: 1a34ee3ae1049c1761c1539d15feef0a0a88bdf6.

No actionable findings in this documentation-only change. The two plans match the unresolved cases documented in #59 and are linked correctly from m0.

Direction: continue as scoped. Removing the shadowing Vulkan loader targets the dependency-resolution problem rather than adding a development-only workaround. Investigating CEF's missing GBM device first, with an explicit startup capability decision and a visible CPU fallback, fits the existing helper design. The separate Mesa investigation remains covered by its existing quest.

Verification: inspected all three changed files, the surrounding quest plans, Nix/build configuration, browser setup and browser tests. GitHub-only static review; no builds, tests, GPU checks, or quest context execution. Read the pinned context source instead. The Check workflow is still running, and runtime correctness of the proposed fixes is not established by this PR.