diff --git a/Docs/setup.md b/Docs/setup.md
index d7a2275..f65a2cd 100644
--- a/Docs/setup.md
+++ b/Docs/setup.md
@@ -12,8 +12,8 @@ Anything marked **human step** needs credentials, licence acceptance, or a decis
 
 - `[x]` Update Bazzite with its supported mechanism.
   `ujust update` (or `rpm-ostree upgrade`) followed by a reboot. Deployment `45.20261105` is booted and default; `44.20261026` retained as rollback.
-- `[-]` Verify the NVIDIA driver and Vulkan from the desktop session.
-  Driver done: `nvidia-smi` names the RTX 5070 Ti, driver `615.78.08`, and the Wayland desktop renders through it. Vulkan instance `1.4.350` loads, but the physical-device line was not captured — run `vulkaninfo --summary | sed -n '/GPU0/,/^$/p'` and record it in [environment.md](environment.md).
+- `[x]` Verify the NVIDIA driver and Vulkan from the desktop session.
+  `nvidia-smi` names the RTX 5070 Ti on driver `615.78.08` and the Wayland desktop renders through it. Vulkan enumerates it as GPU0: discrete, proprietary driver `615.78.08`, API `1.4.351`, conformance `1.4.3.3`. The integrated RADV GPU is GPU1 — watch that the engine does not select it. Evidence in [environment.md](environment.md).
 - `[ ]` Install `git-lfs`, `cmake`, `ninja-build`, `clang` as an ostree layer, reboot, then `git lfs install`.
 
 ## 2. Engine acquisition
diff --git a/Docs/toolchain.md b/Docs/toolchain.md
index f7a5c6c..211b3d4 100644
--- a/Docs/toolchain.md
+++ b/Docs/toolchain.md
@@ -9,7 +9,7 @@ Audited 2026-11-06 on the development workstation.
 | Component | Pinned | Source | Status |
 | --- | --- | --- | --- |
 | Bazzite | `45.20261105` (Kinoite, `bazzite-dx-nvidia`), kernel `7.2.15-ogc1.1.fc45` | `ujust update` / `rpm-ostree upgrade` | Booted and default. `44.20261026` retained as rollback. |
-| NVIDIA driver | `615.78.08`, open kernel module | Bazzite image | Verified: desktop session renders through the RTX 5070 Ti; Vulkan instance 1.4.350. Vulkan device-name capture still pending, see [environment.md](environment.md). |
+| NVIDIA driver | `615.78.08`, open kernel module | Bazzite image | Verified: desktop session renders through the RTX 5070 Ti; Vulkan GPU0 is the RTX 5070 Ti on driver `615.78.08`, conformance `1.4.3.3`. |
 | Unreal Engine | `5.8.x` — pin one exact build | Epic (license required) | Not installed. |
 | Unreal Linux toolchain | engine-bundled clang | Engine source tree | Not installed. Do not substitute the system compiler. |
 | Blender | `5.2` LTS (upstream patch `5.2.3`) | Flatpak `org.blender.Blender` | Installed. |
diff --git a/ROADMAP.md b/ROADMAP.md
index 1ba3981..f9186df 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -8,7 +8,7 @@ Living roadmap for this project. This file is the single source of truth for cur
 
 Status detail in [Docs/setup.md](Docs/setup.md); workstation audit in [Docs/environment.md](Docs/environment.md); pins in [Docs/toolchain.md](Docs/toolchain.md).
 
-- [-] Update Bazzite using its supported mechanism; verify NVIDIA driver and Vulkan operation.
+- [x] Update Bazzite using its supported mechanism; verify NVIDIA driver and Vulkan operation.
 - [ ] Register an Epic account and accept the Unreal license; obtain a pinned Linux engine build or build from Epic's authorized source repository.
 - [ ] Validate Unreal runs on Bazzite before asset production (not an officially supported distribution).
 - [-] Install the engine-required compiler/SDK, Git, Git LFS, and an editor; use Distrobox for isolated CLI dependencies where useful.