diff --git a/assets/xmb/COPYING b/assets/xmb/COPYING
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--- /dev/null
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+Attribution 4.0 International
+
+=======================================================================
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+
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+Section 8 -- Interpretation.
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+Creative Commons may be contacted at creativecommons.org.
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diff --git a/assets/xmb/monochrome/FONT-LICENSE.txt b/assets/xmb/monochrome/FONT-LICENSE.txt
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+M+ FONTS                                Copyright (C) 2002-2019 M+ FONTS PROJECT
+
+-
+
+LICENSE_E
+
+
+
+
+These fonts are free software.
+Unlimited permission is granted to use, copy, and distribute them, with
+or without modification, either commercially or noncommercially.
+THESE FONTS ARE PROVIDED "AS IS" WITHOUT WARRANTY.
+
+
+http://mplus-fonts.osdn.jp
diff --git a/assets/xmb/monochrome/README.md b/assets/xmb/monochrome/README.md
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+XMB Monochrome Theme
+====================
+
+Guidelines
+----------
+
+### Palette
+
+ * The icons have only one color, pure white (#ffffff).
+ * No semi transparent parts except for anti-aliasing purpose.
+
+### Layout
+
+ * The shape should be easily recognizable.
+ * The shapes should be, when possible, aligned to a 64x64 grid, but exported as 256x256 PNGs, to downscale nicely.
+ * The shapes should be included in a circle of radius 31px (except when the shape is itself a circle, then we make it smaller), to insure consistent sizes.
+ * Some special icons have a superelliptic shape with a substracted symbol. They have an associated content icon figuring the same symbol. Symbols should match.
+
+### Style
+
+ * The border radius are either 1px, or 2px.
+ * Lines are 2px.
+ * The level of detail is reduced, we try to represent every button, but we can void representing stickers or color changes.
+
+### Export
+
+The PNGs are better exported by the old Inkscape v0.48.5. Later versions causes a premultiplied alpha issue with our mipmaping and blending code.
+
+### Theme Font
+ * This theme uses the [M+ P Type-1 Regular](http://mplus-fonts.osdn.jp/design.html#mplus_p1) typeface by the [M+ Fonts Project](http://mplus-fonts.osdn.jp/) covered under the [Free License](http://mplus-fonts.osdn.jp/about-en.html#license).
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+    "monochrome/png/undo.png": "788c16b933d21376ab8ab23be356360d05162ff19d26e825e434094b35559ff7",
+    "monochrome/png/wifi.png": "67e5bd4710896b038ab0582491b1df9da94ebab5703428b0e469298884bfe5c1",
+    "monochrome/png/zip.png": "45bda9519a79067f00ca75f0770363bc11b8fdbcded8db7b77d8be559cd188c7"
+  }
+}
diff --git a/config/retroarch.cfg b/config/retroarch.cfg
index b1d9e70..d88a384 100644
--- a/config/retroarch.cfg
+++ b/config/retroarch.cfg
@@ -1,66 +1,22 @@
-# PS5 RetroArch - the configuration the title starts from.
-#
-# This file is the seed: the build copies it into the title folder as
-# retroarch.cfg, and the title's arguments point RetroArch at it
-# (src/main.cpp: -c /app0/retroarch.cfg). RetroArch rewrites it as settings
-# change, so this copy is the starting state, not the live one.
-#
-# video_driver is the one setting here that matters today.
-#
-#   ps5     this project's own driver (src/video_ps5.cpp), which presents
-#           through the console's VideoOut display layer. It initialises and
-#           the title stays up, but nothing it submits reaches the screen -
-#           measured over many runs, see docs/FINDINGS.md.
-#
-#   vulkan  RetroArch's own Vulkan driver, which needs this project's ICD at
-#           libvulkan.so.1 beside the title (LD_LIBRARY_PATH points at the
-#           title's own folder). That library is ../PS5_Vulkan's libps5vk.
-#           Until it is present, naming vulkan here makes RetroArch fail to
-#           initialise and the title exits with status 1, which is worse than
-#           a black screen because it says nothing about the menu.
-#
-# So the safe value is named until the library is beside the title. Change this
-# one line, or the file on the console, to switch paths.
-video_driver = "ps5"
+# PS5 RetroArch seed configuration.
+# The current port also sets compiled defaults because frontend argument
+# rebuilding can discard -c. Keep this seed consistent for configuration loading.
 
-# Quiet by default; the title passes --verbose for runs that are being read.
-# Verbosity is what fills the log below. The entry point also passes
-# --verbose; the two agree, and this is the one a user can change without
-# a rebuild.
-log_verbosity = true
+# GPU video and XMB menu are the default; ps5 video and RGUI remain registered.
+video_driver = "vulkan"
+menu_driver = "xmb"
+assets_directory = "/app0/assets"
 
-# The console has no window to be fullscreen in, and no desktop to hide from.
 video_fullscreen = true
 pause_nonactive = false
 
-# The console's own pad, through this project's input driver (src/input_ps5.cpp).
-#
-# "ps5" is the only input driver this build can use: every driver upstream ships
-# for a Unix needs a library or a header the payload SDK does not carry, and the
-# null driver reports nothing at all, which is what made the menu unreachable.
-# Naming it here is what puts input_drivers[0] in front of the frontend's input
-# path; without it RetroArch picks whatever it finds first, and finds nothing.
+# Native pad input; no separate joypad backend is required.
 input_driver = "ps5"
-
-# The input driver reads the pad itself, so the joypad abstraction - which has no
-# driver at all in this build, and whose absence is what patches/series 0004
-# guards - is left unnamed rather than pointed at a driver that does not exist.
 input_joypad_driver = ""
 
-# RetroArch's own log, written beside the title. It is worth having on for every
-# run: the kernel log cannot see inside the frontend, and /app0/trace.txt only
-# carries the lines this project remembers to write. The file lands in /app0 as
-# retroarch__<date>__<time>.log while log_to_file_timestamp is false, so the
-# newest one is unambiguous.
-#
-# These three are inert today, and the reason is worth keeping: RetroArch
-# initialises the file logger *after* it parses its config, and this title's config
-# is not being read yet - content loading discards the -c argument, and the fix for
-# that is parked because reading the config still crashes the launch. They are here
-# so that the day the config is read, the log appears without anyone remembering.
+# Preserve frontend/core/menu diagnostics during development.
+# The port explicitly initializes this logger after config processing as well.
+log_verbosity = true
 log_to_file = true
 log_to_file_timestamp = false
 log_dir = "/app0"
-
-# Verbosity is what fills that file. The entry point also passes --verbose; the
-# two agree, and this one is the setting a user can change without a rebuild.
diff --git a/docs/ACTIVE.md b/docs/ACTIVE.md
index c61d23f..965954d 100644
--- a/docs/ACTIVE.md
+++ b/docs/ACTIVE.md
@@ -4,66 +4,65 @@ _Updated: 2026-09-19_
 
 ## Now
 
-**The user ended further performance investigation and requested committing the
-logging work, then enabling XMB as the default menu and testing it on PS5.**
-That is the next task; do not continue optimizing RGUI frame timing.
+**XMB is the default menu and is verified on the Vulkan GPU path.** The owner
+reported "It's flawless!" after the texture-coordinate and single-level texture
+correction. GPU readback shows readable text, intact icons and the full-screen
+blue gradient/ribbon. The final normal build removes screenshot instrumentation
+and completed its own 45-second console run with zero refusals or API failures.
+No further performance investigation or new feature is assigned.
 
-## Logging step
+## Verified build
 
-Routine periodic frame/render/API-success messages and successful input-button
-traces are removed; bounded startup diagnostics and all errors remain. Menu
-handover/staging-ask probes now log once. `retroarch.log` is explicitly enabled
-after argument/config processing and records this build's identity; the old file
-had been stale because this port rebuilds arguments. INFO/WARN/ERROR output,
-Vulkan refusals/assertions in `trace.txt`, and host kernel capture remain enabled.
+- Final identity: `2df0e277df59faf661a37920988d1b804394c8ffe509c2b57296270f3dcaf7b3`.
+- Command: `tools/run-title.sh --no-build --watch 45`; it stayed alive and the
+  script closed it. Current `retroarch.log` identity verified; XMB reports
+  `Assets missing: no; fonts ready: yes`. Successful swapchain presentations,
+  no command-buffer errors, no framebuffer capture writes.
+- All five `tools/verify.sh` gates PASS; 31 unit tests. Fresh source replay and
+  second-pass idempotence PASS: 100 named edits. Evidence replay: 13 records PASS.
+- Evidence and unsuccessful diagnostic runs: `evidence/xmb-default/`.
+  Raw logs/images stay ignored in `klog/`; the final run is `xmb-final-run.log`.
+- PS5_Vulkan is unchanged at **6f0ce0d**; this title statically links libps5vk.
+  `video_ps5` and RGUI remain registered/selectable as fallbacks.
 
-Profiling is off by default. `tools/run-title.sh --gpu-profile 60 --watch 80`
-opts into 120 warmup frames followed by up to 60 seconds of in-memory timing.
-The report is written only after measurement and the one-shot control is consumed.
-The runner checks idle state before upload/launch, retrieves `retroarch.log` and
-optional timing, and rejects a frontend log without the expected build identity.
-Definitions/replay: `docs/GPU_TIMING.md`, `tools/analyze-gpu-profile.py`.
+## What XMB required
 
-## Verified results and limits
+Configure enables XMB and retains RGUI. The configure-argument fingerprint avoids
+silently keeping an old RGUI-only build. Official monochrome assets are pinned
+in `assets/xmb/source.json`: 120 fixed icons, M+ 1p font and licenses.
 
-- First buffered run: 3,597 frames / 60.0098 seconds, **59.940238 FPS**;
-  maximum frame interval **16.905813 ms**, no presentation-return gap above 20 ms.
-  Owner: "Very smooth", stable estimated refresh **59.941 Hz** after startup.
-- Restoring fresh frontend logging exposed three ~100 ms texture-update stalls
-  from remaining first-four-call diagnostics. They were reduced to one initial
-  message. The logger now contains this build's identity and Vulkan startup.
-- Final refined build launched with zero driver refusals, logged each menu
-  handover probe once, and returned from `rarch_main` with status 0 before the
-  profile completed. The runner rejected the missing report. **No final timing
-  result is claimed.** The user requested proceeding to XMB instead of more tests.
-- `evidence/vulkan-buffered-logging/` contains both completed timing analyses and
-  the final startup/logging evidence, including that incomplete final capture.
-- All five `tools/verify.sh` gates PASS; 28 tests. Fresh vendor patch replay and
-  second-pass idempotence PASS: 86 edits.
-- Installed identity:
-  `a6063c61145fb42ac409a1d78026f29865673e4575e9a6afc3500e4abccc4f66`.
-- Fresh frontend logs retain the existing audio-driver initialization errors and
-  missing configuration-save directory error. These are outside this logging/menu
-  step, not Vulkan failures; audio/config persistence are not claimed complete.
+Named patches 0060–0063 and 0065–0066 address the ribbon's uniform padding,
+unused descriptor slots, incorrect strip expansion/counts, the title's asset
+path, and padded-image coordinates. The null platform frontend does not run
+Unix asset initialization, so the port seeds `/app0/assets` directly. Important
+XMB path/loading diagnostics remain in the frontend log.
 
-Presentation measurements are CPU timestamps at this driver's synchronous
-present return, not hardware vblank counters. RGUI's refresh estimate averages
-frame intervals; startup frames depress it. No guarantee for other workloads.
+Static/menu textures use one mip level: full mipmapped icons were corrupted
+under the tested driver path. General mip-chain correctness remains unverified.
+`docs/REFERENCE.md` describes these compatibility constraints. The screenshot
+hook is retired in `parked/xmb-readback/`; it is absent from normal builds.
 
-## Preserved GPU acceptance and operating notes
+## Logging and performance scope
 
-Correct GPU RGUI is recorded in `evidence/vulkan-fragment-inputs/`: RGBA conversion
-**947134d**, driver compiler fix **6f0ce0d**, owner-confirmed correct colours and no
-flicker/triangles. PS5_Vulkan was not modified in this logging step. `video_vulkan`
-uses statically linked libps5vk; `video_ps5` stays registered/selectable.
+Logging work was committed as **d46495d** before starting XMB. Startup diagnostics,
+frontend/core INFO/WARN/ERROR, driver refusals, `trace.txt`, `retroarch.log` and
+host kernel capture remain. Routine frame-success/input chatter stays suppressed.
+Profiling is off by default; the opt-in procedure is in `docs/GPU_TIMING.md`.
 
-The user authorized necessary driver fixes with documentation and a commit in
-PS5_Vulkan, and console uploads/runs without further permission. Never interrupt
-an existing title to test. Raw captures remain in ignored `klog/`. Extract the
-last `bss check=` substring and verify identity before reading appended traces.
-No partial switch to the CPU route if the GPU refusal gate cannot be satisfied.
+The owner saw an initial 25 Hz estimate in the successful screenshot build.
+That build synchronously wrote large framebuffer/resource captures after startup;
+its refresh estimate is not a steady-state performance measurement. Those writes
+are removed. **Steady-state XMB performance has not been profiled.** Prior RGUI
+59.94 FPS evidence remains in `evidence/vulkan-buffered-logging/`.
 
-XMB preparation: the current build disables HAVE_XMB, only RGUI fonts are staged.
-Official assets were fetched into ignored `vendor/retroarch-assets` at
-`73106363e14e34c08a5854b4cfbc29f184e3b783`; monochrome icons/font are available.
-No XMB implementation change has landed yet.
+Existing audio initialization errors and the unset configuration-save directory
+remain visible and out of scope. Configuration persistence, cores, audio and
+per-system playlist artwork are not claimed complete by this menu step.
+
+## Operating notes
+
+The user authorized console uploads/runs without further permission and necessary
+driver fixes with documentation plus a PS5_Vulkan commit. Never interrupt an
+existing title. The runner checks idle state before upload and launch. For appended
+trace files, select the last `bss check=` substring and verify its build identity.
+Never substitute the CPU route to conceal a GPU refusal.
diff --git a/docs/FINDINGS.md b/docs/FINDINGS.md
index 017eb41..9feaa71 100644
--- a/docs/FINDINGS.md
+++ b/docs/FINDINGS.md
@@ -2509,3 +2509,37 @@ RetroArch run has zero refusals/errors, 909/909 correct opaque-white samples,
 identical consecutive frames, and owner confirmation of correct colours without
 flicker or triangles. Evidence: `evidence/vulkan-fragment-inputs/`. The earlier
 blend-state hypothesis did not fix the defect and is not the established cause.
+
+## 2026-09-19 — XMB exposes descriptor, geometry and texture assumptions
+
+XMB's ribbon uploads two floats (8 bytes); libps5vk currently requires whole
+16-byte UBO records. Padding the upload without moving those fields clears that
+refusal. Its untextured effect omits sampler writes, while the driver's metadata
+validates stage-visible layout entries even when the shader does not sample
+those slots. Binding the existing white texture/nearest sampler clears the second
+refusal. These are frontend compatibility measures, not expanded driver coverage.
+
+The port's old strip converter read beyond source arrays and submitted the
+unexpanded count. Its replacement emits each consecutive triple with alternating
+winding (a quad becomes 0,1,2,2,1,3) and submits the expanded count for both menu
+effects and icons. A host C regression exercises strips through 8,064 vertices.
+
+The title selects the null platform frontend. Merely defining ASSETS_DIR for
+platform_unix does not initialize the asset path; setting the title default to
+/app0/assets makes the shipped monochrome icons/font load. Startup logging now
+records the resolved paths and whether assets/fonts are ready.
+
+The earlier whole-row compatibility patch widened images but retained normalized
+coordinates for their logical width. Readback showed a thin background strip and
+font glyph fragments. Scaling display UVs and normalizing glyph offsets by the
+physical image width restores sampling of the intended content. Row alignment
+also depends on format: 256-byte rows mean 64 RGBA8 texels or 256 R8 texels.
+
+The 256x256 icons (whose base width is already aligned) showed repeated/cropped
+mip fragments. Single-level static images render correctly in the corrected
+capture. The driver internals behind mipmapped corruption are not established;
+this port keeps one mip level pending separate mip-chain investigation.
+
+Owner: "It's flawless!" after the rendering corrections. Final normal build:
+45 seconds, zero refusals/API errors, successful presentations, assets loaded,
+no screenshot writes. Evidence: `evidence/xmb-default/`. PS5_Vulkan was unchanged.
diff --git a/docs/PHASE_LOG.md b/docs/PHASE_LOG.md
index 72bcfe9..ff57d5a 100644
--- a/docs/PHASE_LOG.md
+++ b/docs/PHASE_LOG.md
@@ -1730,3 +1730,63 @@ and outside this step's acceptance.
 All five host gates PASS, 28 tests; fresh patch replay/idempotence PASS, 86 edits.
 Evidence: evidence/vulkan-buffered-logging/{capture,expectation}.json. Replay:
 python3 tools/evidence.py compare evidence/. Raw logs and TSV remain in klog/.
+
+## 2026-09-19 — XMB default on the Vulkan path
+
+The user ended performance work; logging was committed as d46495d, then this step
+enabled upstream XMB while retaining RGUI/video_ps5. Official monochrome assets
+are pinned at 73106363e14e34c08a5854b4cfbc29f184e3b783 (120 fixed icons, M+ font,
+licenses). Configure arguments now invalidate the cached configured tree before
+feature flags are derived. The asset pin adds no build-time network dependency.
+ASSETS_DIR uses the Unix prefix convention; patch 0063 sets the actual title asset
+default because the null platform frontend never executes Unix initialization.
+
+Console commands were `tools/run-title.sh --no-build --watch N`; each upload was
+read back and the run trace selected by its last startup marker/build identity.
+Raw files below are ignored; per-run identities, counts and results are distilled
+in evidence/xmb-default/capture.json:
+
+- xmb-first-run.log (60 s): XMB aborted on an 8-byte UBO range; EndCommandBuffer
+  returned -13, then Mesa asserted on submission of the invalid command buffer.
+  Owner reported black/background/crash. Patch 0060 pads the ribbon upload.
+- xmb-corrected-run.log (60 s): the range refusal cleared; missing sampler binding
+  1 caused the next -13/assertion. Owner again saw no usable menu. Patch 0061 also
+  fixes the independently found strip bounds/count bug; patch 0062 binds the
+  unused sampler slots through the existing descriptor-fill path.
+- xmb-bindings-run.log (60 s): zero refusals/API errors; title survived until the
+  script closed it. Input worked, but the owner saw faint text and black output.
+- xmb-assets-run.log (60 s): explicit /app0/assets default, startup diagnostics
+  report assets present/fonts ready; zero refusals and full script-owned run.
+  Owner still reported corrupted icons/text. This ruled out missing assets.
+- xmb-capture-run.log (30 s): authorized readback on frames 120/121 reproduced the
+  narrow background, glyph fragments and repeated/cropped icon mip fragments.
+- xmb-textures-run.log (45 s): patch 0065 fixes physical-row alignment/UVs; 0066
+  uses one static texture level. Readback shows readable XMB with intact icons,
+  gradient and ribbon. Owner: "It's flawless!"; initial estimated refresh 25 Hz.
+  This diagnostic wrote large synchronous snapshots; no performance claim made.
+- xmb-final-run.log (45 s): screenshot source/hook removed. Identity
+  2df0e277df59faf661a37920988d1b804394c8ffe509c2b57296270f3dcaf7b3;
+  zero refusals, no API failures/assertion, successful presentations, current
+  frontend log, assets present/fonts ready, no framebuffer writes. Script closed
+  the still-running title. PS5_Vulkan remained unchanged at 6f0ce0d.
+
+Host verification: tools/verify.sh PASS (format/unit/build/integration/evidence),
+31 unit tests, 278/278 frontend sources. Fresh vendor replay and second-pass
+idempotence PASS for 100 edits (86 plus 14 XMB compatibility/diagnostic edits).
+The geometry test executes C and checks bounds/winding through the complete
+ribbon; row-alignment cases include 336/720-wide R8 atlases. Asset tests verify
+pinned checksums and every fixed icon named by upstream. Evidence replay after
+adding this record: 13 captures, zero failures.
+
+Intermediate host failures were fixed before deployment: the edit-count guard
+was updated after intentional additions; the asset logger needed verbosity.h;
+the temporary capture anchor was made distinct from the timing hook. Removing
+that capture initially left its call in the generated source and failed linking
+ps5_capture_images. Restoring that generated file from pristine vendor and
+reapplying the final named edits removed it; the normal rebuild and gates passed.
+The retired recipe documents this patch-removal requirement.
+
+Reproduce acceptance with tools/verify.sh, tools/run-title.sh --no-build --watch
+45 and python3 tools/evidence.py compare evidence/. Screenshot recipe:
+parked/xmb-readback/README.md. Known audio/config-save errors remain logged.
+No core, steady-state XMB FPS or general mip-chain correctness is claimed.
diff --git a/docs/REFERENCE.md b/docs/REFERENCE.md
index e41ec4b..c8eb5c0 100644
--- a/docs/REFERENCE.md
+++ b/docs/REFERENCE.md
@@ -228,3 +228,49 @@ The mandatory surface is small, and the rest is optional:
 Field order matters: the struct is initialised positionally, and `overlay_interface`
 sits inside `#ifdef HAVE_OVERLAY` before `poke_interface`, so an initialiser has to
 account for it.
+
+## XMB menu assets and build selection
+
+XMB uses RetroArch's existing Vulkan display driver; no new graphics backend or
+runtime dependency is added. Configure enables XMB and retains RGUI; upstream's
+default selection prefers XMB when Ozone/MaterialUI are disabled. The seed config
+matches that selection. Configure arguments are fingerprinted before feature
+flags are derived so an existing configured tree cannot silently retain RGUI-only
+objects. `ASSETS_DIR` is `/app0`, since platform_unix appends `/assets` itself.
+The title currently selects the null platform frontend, so that Unix initializer
+does not execute: patch 0063 seeds `/app0/assets` directly in configuration
+defaults and records the resolved XMB paths and load result at context reset.
+
+`assets/xmb/source.json` pins the official libretro/retroarch-assets revision
+73106363e14e34c08a5854b4cfbc29f184e3b783 and hashes the shipped subset: all 120
+fixed menu icons named by RetroArch 1.22.2's xmb_texture_path, the monochrome M+ 1p
+font, attribution and licenses. This pin makes the required menu artwork
+reproducible without downloading assets at build/run time. Per-system playlist
+icons are not shipped yet; standard default/content icons are included.
+
+The XMB ribbon retains its two-float shader layout but uploads a zero-padded
+16-byte uniform block (named patch 0060), matching libps5vk's current whole-record
+restriction. This is frontend compatibility padding, not general support for
+arbitrary UBO ranges in the driver. Named patch 0061 expands each triangle strip
+into list vertices with alternating winding and submits the expanded count for
+both effect and icon draws. `tests/test_xmb_assets.py` executes the C index mapping
+for strips through the full 8,064-vertex ribbon and checks bounds and winding.
+
+Named patch 0062 also binds the existing white texture and nearest sampler for
+untextured menu effects. The ribbon shader does not sample them, but libps5vk
+currently validates all stage-visible descriptor layout entries rather than just
+statically used shader bindings. This uses the same descriptor-fill compatibility
+path as textured draws (including patch 0026's second sampler slot).
+
+Named patch 0065 keeps texture coordinates consistent with the physical image
+width required by the driver's row alignment. RGBA8 rows need 64-texel alignment;
+R8 font rows need 256-texel alignment. Display UVs are scaled to the logical image
+region and font atlas offsets are normalized by the physical width. Padding only
+the image width changes what a normalized coordinate samples.
+
+Named patch 0066 keeps static/menu textures at one mip level. XMB's full mipmapped
+icons rendered as repeated/cropped fragments in the tested libps5vk path; the
+single-level images render correctly. This is a compatibility limit, not proof
+that the driver's general mip-chain storage/sampling is correct. RGUI and the
+CPU video driver remain compiled and selectable. The retired screenshot recipe
+is `parked/xmb-readback/README.md`; screenshots are not taken by normal builds.
diff --git a/evidence/xmb-default/capture.json b/evidence/xmb-default/capture.json
new file mode 100644
index 0000000..0753463
--- /dev/null
+++ b/evidence/xmb-default/capture.json
@@ -0,0 +1,167 @@
+{
+  "step": "xmb-default",
+  "recorded": "2026-09-19T16:13:24.443981+00:00",
+  "command": "tools/run-title.sh --no-build --watch 45",
+  "raw_capture": "klog/xmb-final-run.log",
+  "raw_lines": 6936,
+  "revision": "d46495d + XMB default changes",
+  "build_identity": "2df0e277df59faf661a37920988d1b804394c8ffe509c2b57296270f3dcaf7b3",
+  "lines": [
+    "XMB default: compiled and installed; RGUI and video_ps5 retained.",
+    "Final normal run: 45 seconds; refusals=0; API failures=0; successful Vulkan presentations.",
+    "Assets missing: no; fonts ready: yes; current build identity in retroarch.log.",
+    "No framebuffer capture writes in the final normal run.",
+    "Owner: \"It's flawless!\" after padded-coordinate and single-level texture correction.",
+    "GPU readback shows readable text, intact icons and full-screen gradient/ribbon.",
+    "All five gates PASS; 31 unit tests; fresh replay/idempotence PASS: 100 edits.",
+    "Earlier runs: uniform-range refusal, missing sampler refusal, missing assets, then texture corruption.",
+    "Single-level static/menu textures retained; general mip-chain correctness remains unverified.",
+    "PS5_Vulkan unchanged; no steady-state XMB performance measurement claimed."
+  ],
+  "runs": [
+    {
+      "name": "first",
+      "command": "tools/run-title.sh --no-build --watch 60",
+      "raw_capture": "klog/xmb-first-run.log",
+      "raw_sha256": "501d5bbfbc3ef556913832dfdc29b9018273258dc6cbbeb9bc4517a7ee6bb7d1",
+      "build_identity": "8817398711d080eb3b60f2a7815769e011992f1c834c445bde4905940caae080",
+      "refusal_lines": [
+        "vulkan: set 0 binding 0 covers 8 bytes, not a whole number of 16-byte elements (VK_ERROR_UNKNOWN)",
+        "vulkan: VK_ERROR_UNKNOWN"
+      ],
+      "api_failures": [
+        "gpu result: vkEndCommandBuffer calls=11 failures=1 result=-13"
+      ],
+      "assertion": true,
+      "presentation_observed": false,
+      "frontend_current": true,
+      "asset_diagnostics": [],
+      "capture_writes": [],
+      "verdict": "==> [run] VERDICT: it started and then died; the signal block above names where"
+    },
+    {
+      "name": "corrected",
+      "command": "tools/run-title.sh --no-build --watch 60",
+      "raw_capture": "klog/xmb-corrected-run.log",
+      "raw_sha256": "c634714639469c5acf75abb1f9ddb03009d619d15826f55067429c806ac73a4a",
+      "build_identity": "aac47ced9ef6af98eef281972a668eb8d053901b2ec6bfe5709abf598cf71cb0",
+      "refusal_lines": [
+        "vulkan: set 0 binding 1 is not bound or holds no write; the application has to bind and update it (docs/M5_REFERENCE.md, C3) (VK_ERROR_UNKNOWN)",
+        "vulkan: VK_ERROR_UNKNOWN"
+      ],
+      "api_failures": [
+        "gpu result: vkEndCommandBuffer calls=11 failures=1 result=-13"
+      ],
+      "assertion": true,
+      "presentation_observed": false,
+      "frontend_current": true,
+      "asset_diagnostics": [],
+      "capture_writes": [],
+      "verdict": "==> [run] VERDICT: it started and then died; the signal block above names where"
+    },
+    {
+      "name": "bindings",
+      "command": "tools/run-title.sh --no-build --watch 60",
+      "raw_capture": "klog/xmb-bindings-run.log",
+      "raw_sha256": "772248c972333c2a1f7f7b963c47dc5547095444a5cd260ee2d058f13d6b48d3",
+      "build_identity": "c7982b6de48cc871877a11f9ea1fdba195d6af6ac0e4a61d2baca76a8730c0c2",
+      "refusal_lines": [],
+      "api_failures": [],
+      "assertion": false,
+      "presentation_observed": true,
+      "frontend_current": true,
+      "asset_diagnostics": [],
+      "capture_writes": [],
+      "verdict": "==> [run] VERDICT: it ran for 60s and this script closed it"
+    },
+    {
+      "name": "assets",
+      "command": "tools/run-title.sh --no-build --watch 60",
+      "raw_capture": "klog/xmb-assets-run.log",
+      "raw_sha256": "aae2b89d5e1d3d35c57fe8e38b9a0e5c57481b99f8e1bee23bfdb5d0e95eeb9c",
+      "build_identity": "2bdf04f98c337ddfa39c38e4559d7fcb58216159dcd32b6b66356e0a33fedc61",
+      "refusal_lines": [],
+      "api_failures": [],
+      "assertion": false,
+      "presentation_observed": true,
+      "frontend_current": true,
+      "asset_diagnostics": [
+        "[INFO] [XMB] Icons: /app0/assets/xmb/monochrome/png; font: /app0/assets/xmb/monochrome/font.ttf",
+        "[INFO] [XMB] Assets missing: no; fonts ready: yes",
+        "[INFO] [XMB] Icons: /app0/assets/xmb/monochrome/png; font: /app0/assets/xmb/monochrome/font.ttf"
+      ],
+      "capture_writes": [],
+      "verdict": "==> [run] VERDICT: it ran for 60s and this script closed it"
+    },
+    {
+      "name": "capture",
+      "command": "tools/run-title.sh --no-build --watch 30",
+      "raw_capture": "klog/xmb-capture-run.log",
+      "raw_sha256": "85b2f410f3f664de9baecac4641e1152c3969b68017f07e8599ad62b2cf5d328",
+      "build_identity": "4bbfa9a4346bed706d867e0fce5ed440dc7a1a8338df3004efc0d59ec48ead3b",
+      "refusal_lines": [],
+      "api_failures": [],
+      "assertion": false,
+      "presentation_observed": true,
+      "frontend_current": true,
+      "asset_diagnostics": [
+        "[INFO] [XMB] Icons: /app0/assets/xmb/monochrome/png; font: /app0/assets/xmb/monochrome/font.ttf",
+        "[INFO] [XMB] Assets missing: no; fonts ready: yes",
+        "[INFO] [XMB] Icons: /app0/assets/xmb/monochrome/png; font: /app0/assets/xmb/monochrome/font.ttf"
+      ],
+      "capture_writes": [
+        "gpu capture: target frame=120 bytes=33554432 written=33554432 close=0",
+        "gpu capture: target frame=121 bytes=33554432 written=33554432 close=0"
+      ],
+      "verdict": "==> [run] VERDICT: it ran for 30s and this script closed it"
+    },
+    {
+      "name": "textures",
+      "command": "tools/run-title.sh --no-build --watch 45",
+      "raw_capture": "klog/xmb-textures-run.log",
+      "raw_sha256": "ff90c666379b8b326aa121e64dbe35ed75737b37725533bc6312f01b8fd9386d",
+      "build_identity": "5de34e4760a0a91b212b155da66de82dc8429cb82e2cb9f77b22c70f2a341542",
+      "refusal_lines": [],
+      "api_failures": [],
+      "assertion": false,
+      "presentation_observed": true,
+      "frontend_current": true,
+      "asset_diagnostics": [
+        "[INFO] [XMB] Icons: /app0/assets/xmb/monochrome/png; font: /app0/assets/xmb/monochrome/font.ttf",
+        "[INFO] [XMB] Assets missing: no; fonts ready: yes",
+        "[INFO] [XMB] Icons: /app0/assets/xmb/monochrome/png; font: /app0/assets/xmb/monochrome/font.ttf"
+      ],
+      "capture_writes": [
+        "gpu capture: target frame=120 bytes=33554432 written=33554432 close=0",
+        "gpu capture: target frame=121 bytes=33554432 written=33554432 close=0"
+      ],
+      "verdict": "==> [run] VERDICT: it ran for 45s and this script closed it"
+    },
+    {
+      "name": "final",
+      "command": "tools/run-title.sh --no-build --watch 45",
+      "raw_capture": "klog/xmb-final-run.log",
+      "raw_sha256": "ad5f396c597813ce38c3a45eb160ee1c2abb2a3c630a06825cdd58bac6754031",
+      "build_identity": "2df0e277df59faf661a37920988d1b804394c8ffe509c2b57296270f3dcaf7b3",
+      "refusal_lines": [],
+      "api_failures": [],
+      "assertion": false,
+      "presentation_observed": true,
+      "frontend_current": true,
+      "asset_diagnostics": [
+        "[INFO] [XMB] Icons: /app0/assets/xmb/monochrome/png; font: /app0/assets/xmb/monochrome/font.ttf",
+        "[INFO] [XMB] Assets missing: no; fonts ready: yes",
+        "[INFO] [XMB] Icons: /app0/assets/xmb/monochrome/png; font: /app0/assets/xmb/monochrome/font.ttf"
+      ],
+      "capture_writes": [],
+      "verdict": "==> [run] VERDICT: it ran for 45s and this script closed it"
+    }
+  ],
+  "screenshot_hashes": {
+    "klog/xmb-capture/target-120.png": "ffb19331a9f54ab34d55880a6465a62c49a1c010b1d6b02e89cd45a5f23b7b24",
+    "klog/xmb-capture/target-121.png": "39213b50aba2b93f12d528fca022d65cd1feac89458ef17fc237d240b53a4229",
+    "klog/xmb-textures-capture/target-120.png": "7ecf62bb510a28e42bce8272291e524acbcc143f90cbe8c9832d0d5fd463d89e",
+    "klog/xmb-textures-capture/target-121.png": "b1b5b65e187f8f1f205cc4940c2098582960263a12399f2340c342fa4e1e918f"
+  },
+  "assets_revision": "73106363e14e34c08a5854b4cfbc29f184e3b783"
+}
diff --git a/evidence/xmb-default/expectation.json b/evidence/xmb-default/expectation.json
new file mode 100644
index 0000000..143159c
--- /dev/null
+++ b/evidence/xmb-default/expectation.json
@@ -0,0 +1,15 @@
+{
+  "step": "xmb-default",
+  "note": "Owner-confirmed XMB through Vulkan; final run has no capture hook. Failed diagnostic attempts are preserved in the run records.",
+  "must_contain": [
+    "refusals=0",
+    "API failures=0",
+    "Assets missing: no; fonts ready: yes",
+    "No framebuffer capture writes",
+    "Owner: \"It's flawless!\"",
+    "All five gates PASS",
+    "PS5_Vulkan unchanged"
+  ],
+  "must_not_contain": [],
+  "human_check": "Owner confirms flawless XMB after the final rendering correction; normal build removes only screenshot diagnostics."
+}
diff --git a/parked/xmb-readback/README.md b/parked/xmb-readback/README.md
new file mode 100644
index 0000000..6574b30
--- /dev/null
+++ b/parked/xmb-readback/README.md
@@ -0,0 +1,23 @@
+# Retired XMB framebuffer diagnostic
+
+The owner authorized screenshots to diagnose XMB corruption. This hook captured
+swapchain frames 120 and 121 after queue idle and shader/buffer/table resources
+on frame 120. It is not part of the normal title: the large synchronous writes
+pause rendering and contaminate the frontend's refresh estimate.
+
+To repeat: apply `diagnostic.patch`, copy `vulkan_capture.cpp` into `src/`, run
+`tools/verify.sh`, then `tools/run-title.sh --no-build --watch 45` on an idle
+console. Retrieve `gpu-target-120.bin` and `gpu-target-121.bin` from the title's
+FTP directory into ignored `klog/`. The captured resource filenames and byte
+counts are listed in that launch's trace. XMB has no RGUI menu image, so the
+zero-byte menu capture is expected. Decode the targets with
+`python3 parked/xmb-readback/decode-targets.py <capture-directory>`.
+
+Remove the hook/source again after diagnosis. Refresh the generated
+`build/ra-conf/gfx/drivers/vulkan.c` from its pristine vendor counterpart, then
+reapply `tools/apply-port-patches.py build/ra-conf` before rebuilding: the
+patcher adds named edits but does not undo a retired edit automatically.
+The driver debug API only reads
+storage; the rendered image comes from Vulkan's swapchain, not a CPU renderer.
+The original captures remain in ignored `klog/xmb-capture/` and the corrected
+ones in `klog/xmb-textures-capture/`. Evidence is in `evidence/xmb-default/`.
diff --git a/parked/xmb-readback/decode-targets.py b/parked/xmb-readback/decode-targets.py
new file mode 100644
index 0000000..06a59d6
--- /dev/null
+++ b/parked/xmb-readback/decode-targets.py
@@ -0,0 +1,15 @@
+import numpy as np
+from PIL import Image
+from pathlib import Path
+import sys
+base = Path(sys.argv[1])
+x,y=np.meshgrid(np.arange(3840,dtype=np.uint32),np.arange(2160,dtype=np.uint32))
+sx=x&127;sy=y&127
+local=((sy<<4)&0x70)^((sy<<5)&0xf00)^((sy<<9)&0x1000)^((sy<<8)&0x4000)^((sx<<2)&0xc)^((sx<<5)&0x380)^((sx<<4)&0x400)^((sx<<6)&0x800)^((sx<<9)&0xa000)
+offset=((y//128)*30+x//128)*0x10000+local
+for frame in (120,121):
+ raw=np.fromfile(base / f'gpu-target-{frame}.bin',dtype=np.uint8)
+ target=raw[offset[:,:,None]+np.arange(4)].copy()[:,:,[2,1,0,3]]
+ Image.fromarray(target).save(base / f'target-{frame}.png')
+ Image.fromarray(target[:,:,:3]).resize((1280,720)).save(base / f'target-{frame}-preview.png')
+ print(frame,'target RGB minima/maxima',target[:,:,:3].min(axis=(0,1)),target[:,:,:3].max(axis=(0,1)))
diff --git a/parked/xmb-readback/diagnostic.patch b/parked/xmb-readback/diagnostic.patch
new file mode 100644
index 0000000..ea345d3
--- /dev/null
+++ b/parked/xmb-readback/diagnostic.patch
@@ -0,0 +1,52 @@
+--- a/tools/apply-port-patches.py
++++ b/tools/apply-port-patches.py
+@@ -2258,6 +2258,26 @@
+         '#include "../../configuration.h"\n'
+         '#include "../../verbosity.h" /* patches/series, 0063: XMB asset logger */',
+         "patches/series, 0063: XMB asset logger",
++    ),
++    (
++        'gfx/drivers/vulkan.c',
++        '   if (vk->ctx_driver->swap_buffers)\n'
++        '      vk->ctx_driver->swap_buffers(vk->ctx_data);\n'
++        '   ps5_vulkan_profile_end();\n',
++        '   /* patches/series, 0064: temporary XMB framebuffer capture. */\n'
++        '   {\n'
++        '      static unsigned ps5_capture_frame;\n'
++        '      if (++ps5_capture_frame == 120 || ps5_capture_frame == 121)\n'
++        '      {\n'
++        '         extern void ps5_capture_images(unsigned, VkImage, VkImage, VkDevice);\n'
++        '         if (vkQueueWaitIdle(vk->context->queue) == VK_SUCCESS)\n'
++        '            ps5_capture_images(ps5_capture_frame, VK_NULL_HANDLE, backbuffer->image, vk->context->device);\n'
++        '      }\n'
++        '   }\n'
++        '   if (vk->ctx_driver->swap_buffers)\n'
++        '      vk->ctx_driver->swap_buffers(vk->ctx_data);\n'
++        '   ps5_vulkan_profile_end();\n',
++        'patches/series, 0064: temporary XMB framebuffer capture',
+     ),
+     (
+         'gfx/drivers/vulkan.c',
+--- a/patches/series
++++ b/patches/series
+@@ -59,6 +59,9 @@
+ # 0063  seed the title asset path without Unix platform initialization and log XMB startup
+ 0063-set-title-menu-asset-directory
+ 
++# 0064  temporary screenshot capture, removed after XMB diagnosis
++0064-capture-xmb-framebuffer
++
+ # 0065  address the logical image inside driver-required row padding, including R8 fonts
+ 0065-correct-padded-texture-coordinates
+ 
+--- a/tests/test_frontend.py
++++ b/tests/test_frontend.py
+@@ -300,7 +300,7 @@
+         change deliberately, in a commit that says why.
+         """
+         self.assertEqual(
+-            len(self.blocks()), 100,
++            len(self.blocks()), 101,
+             "the patch count changed: if a block was added or removed on purpose, "
+             "update this number in the same commit and say why in its message")
+ 
diff --git a/parked/xmb-readback/vulkan_capture.cpp b/parked/xmb-readback/vulkan_capture.cpp
new file mode 100644
index 0000000..220d6a7
--- /dev/null
+++ b/parked/xmb-readback/vulkan_capture.cpp
@@ -0,0 +1,60 @@
+/* PS5 RetroArch - bounded diagnostic readback through the driver's debug API.
+ * Copyright (C) 2026 Mihawk
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "gfx/include/vulkan/vulkan.h"
+#include <cstdio>
+
+extern "C" void *ps5vk_debug_image_storage(VkImage image, size_t *bytes);
+
+struct Stage
+{
+    void *address;
+    size_t bytes;
+};
+extern "C" uint32_t ps5vk_debug_pipeline_stages(VkDevice, Stage *, uint32_t);
+extern "C" uint32_t ps5vk_debug_buffers(VkDevice, Stage *, uint32_t);
+extern "C" uint32_t ps5vk_debug_table_chunks(VkDevice, Stage *, uint32_t);
+extern "C" void ps5_capture_images(unsigned frame, VkImage menu, VkImage target, VkDevice device)
+{
+    if (frame == 120)
+    {
+        Stage stages[64] = {};
+        for (unsigned kind = 0; kind < 3; ++kind)
+        {
+            const char *name = kind == 0 ? "stages" : kind == 1 ? "buffers" : "tables";
+            uint32_t count = kind == 0   ? ps5vk_debug_pipeline_stages(device, stages, 64)
+                             : kind == 1 ? ps5vk_debug_buffers(device, stages, 64)
+                                         : ps5vk_debug_table_chunks(device, stages, 64);
+            for (uint32_t i = 0; i < count && i < 64; ++i)
+            {
+                if (stages[i].bytes > 4 * 1024 * 1024)
+                    continue;
+                char path[96];
+                std::snprintf(path, sizeof(path), "/app0/gpu-%s-%u.bin", name, i);
+                FILE *file = std::fopen(path, "wb");
+                const size_t written =
+                    file ? std::fwrite(stages[i].address, 1, stages[i].bytes, file) : 0;
+                const int closed = file ? std::fclose(file) : -1;
+                std::fprintf(stderr,
+                             "gpu resources: %s %u address=%p bytes=%zu written=%zu close=%d\n",
+                             name, i, stages[i].address, stages[i].bytes, written, closed);
+            }
+        }
+    }
+    const VkImage images[] = {menu, target};
+    const char *names[] = {"menu", "target"};
+    for (unsigned i = 0; i < 2; ++i)
+    {
+        size_t bytes = 0;
+        const void *pixels = ps5vk_debug_image_storage(images[i], &bytes);
+        char path[96];
+        std::snprintf(path, sizeof(path), "/app0/gpu-%s-%u.bin", names[i], frame);
+        FILE *file = pixels && bytes ? std::fopen(path, "wb") : nullptr;
+        size_t written = file ? std::fwrite(pixels, 1, bytes, file) : 0;
+        const int closed = file ? std::fclose(file) : -1;
+        std::fprintf(stderr, "gpu capture: %s frame=%u bytes=%zu written=%zu close=%d\n", names[i],
+                     frame, bytes, written, closed);
+    }
+}
diff --git a/patches/series b/patches/series
index 4308857..b3d77fb 100644
--- a/patches/series
+++ b/patches/series
@@ -46,3 +46,21 @@
 
 # 0059  the first menu upload proves the handover; later updates must not write probes
 0059-log-menu-handover-once
+
+# 0060  pad the XMB ribbon uniform upload to the driver's 16-byte record size
+0060-pad-xmb-ribbon-uniform
+
+# 0061  expand XMB strips safely and submit the expanded vertex count
+0061-correct-display-triangle-strip-expansion
+
+# 0062  populate unused sampler layout slots for untextured menu effects
+0062-bind-menu-effect-placeholder-texture
+
+# 0063  seed the title asset path without Unix platform initialization and log XMB startup
+0063-set-title-menu-asset-directory
+
+# 0065  address the logical image inside driver-required row padding, including R8 fonts
+0065-correct-padded-texture-coordinates
+
+# 0066  isolate XMB sampling from unverified mip-chain layout
+0066-single-level-menu-textures
diff --git a/tests/test_frontend.py b/tests/test_frontend.py
index 496dc70..336cb3a 100644
--- a/tests/test_frontend.py
+++ b/tests/test_frontend.py
@@ -300,7 +300,7 @@ class PortPatches(unittest.TestCase):
         change deliberately, in a commit that says why.
         """
         self.assertEqual(
-            len(self.blocks()), 86,
+            len(self.blocks()), 100,
             "the patch count changed: if a block was added or removed on purpose, "
             "update this number in the same commit and say why in its message")
 
@@ -310,8 +310,8 @@ class PortPatches(unittest.TestCase):
         for edit in edits:
             per_file[edit[0]] = per_file.get(edit[0], 0) + 1
         self.assertEqual(
-            per_file.get("configuration.c"), 2,
-            f"configuration.c should carry two distinct edits (the input default and "
+            per_file.get("configuration.c"), 3,
+            f"configuration.c should carry three distinct edits (asset path, input default and "
             f"the video default); counts are {per_file}")
         self.assertEqual(
             per_file.get("input/input_driver.c"), 3,
diff --git a/tests/test_xmb_assets.py b/tests/test_xmb_assets.py
new file mode 100644
index 0000000..c170848
--- /dev/null
+++ b/tests/test_xmb_assets.py
@@ -0,0 +1,96 @@
+"""The default XMB menu must ship every fixed icon and its usable font."""
+
+import hashlib
+import json
+from pathlib import Path
+import re
+import subprocess
+import unittest
+
+ROOT = Path(__file__).resolve().parent.parent
+
+
+class XmbAssets(unittest.TestCase):
+    def test_xmb_enabled_with_rgui_available(self):
+        flags = subprocess.check_output(['bash', 'tools/retroarch-sources.sh', '--config'],
+                                        cwd=ROOT, text=True).splitlines()
+        self.assertIn('--enable-xmb', flags)
+        self.assertIn('--enable-rgui', flags)
+        self.assertNotIn('--disable-xmb', flags)
+
+    def test_complete_pinned_theme(self):
+        base = ROOT / 'assets/xmb'
+        manifest = json.loads((base / 'source.json').read_text())
+        for name, expected in manifest['files'].items():
+            with self.subTest(asset=name):
+                self.assertEqual(hashlib.sha256((base / name).read_bytes()).hexdigest(), expected)
+        source = (ROOT / 'vendor/retroarch/menu/drivers/xmb.c').read_text()
+        start = source.index('static const char *xmb_texture_path')
+        end = source.index('\n}', start)
+        names = set(re.findall(r'"([^"/]+\.png)"', source[start:end]))
+        self.assertTrue(names)
+        for name in names:
+            self.assertEqual((base / 'monochrome/png' / name).read_bytes()[:8], b'\x89PNG\r\n\x1a\n')
+        self.assertEqual((base / 'monochrome/font.ttf').read_bytes()[:4], b'\0\1\0\0')
+        self.assertTrue((base / 'monochrome/FONT-LICENSE.txt').is_file())
+
+
+class XmbGeometry(unittest.TestCase):
+    def test_strip_expansion_preserves_triangles_and_bounds(self):
+        """Execute the port's C mapping, including the 8,064-vertex ribbon."""
+        import ast
+        import tempfile
+        source = (ROOT / 'vendor/retroarch/gfx/drivers/vulkan.c').read_text()
+        tree = ast.parse((ROOT / 'tools/apply-port-patches.py').read_text())
+        edits = next(ast.literal_eval(n.value) for n in tree.body
+                     if isinstance(n, ast.Assign) and n.targets[0].id == 'EDITS')
+        for name, anchor, replacement, marker in edits:
+            if name == 'gfx/drivers/vulkan.c' and marker not in source:
+                self.assertIn(anchor, source)
+                source = source.replace(anchor, replacement, 1)
+        count = re.search(r'const unsigned output_count =\s*(.*?);', source, re.S).group(1)
+        index = re.search(r'const unsigned s = as_strip\s*(.*?);', source, re.S).group(1)
+        code = '''#include <assert.h>
+#include <stdbool.h>
+unsigned count(unsigned source_count, bool as_strip) { return COUNT; }
+unsigned index_at(unsigned i, bool as_strip) { return as_strip INDEX; }
+int main(void) {
+    const unsigned quad[] = {0,1,2,2,1,3};
+    for (unsigned i=0;i<6;i++) assert(index_at(i,true)==quad[i]);
+    assert(count(0,true)==0 && count(1,true)==0 && count(2,true)==0);
+    for (unsigned n=3;n<=8064;n++) {
+        assert(count(n,true)==3*(n-2));
+        assert(count(n,false)==n);
+        for (unsigned i=0;i<count(n,true);i+=3) {
+            unsigned a=index_at(i,true), b=index_at(i+1,true), c=index_at(i+2,true);
+            assert(a<n && b<n && c<n);
+            /* Each consecutive source triple appears once, with strip winding. */
+            unsigned t=i/3;
+            assert(c==t+2 && a+b==2*t+1);
+            assert((t%2==0 && a<b) || (t%2==1 && b<a));
+        }
+        assert(index_at(n-1,false)==n-1);
+    }
+}
+'''.replace('COUNT', count).replace('INDEX', index)
+        helper = re.search(r'static unsigned ps5_vulkan_texture_width.*?\n}', source, re.S).group(0)
+        code = code.replace('int main(void)', helper + '\nint main(void)')
+        code = code.replace('const unsigned quad[]', '''assert(ps5_vulkan_texture_width(1,4)==64);
+    assert(ps5_vulkan_texture_width(320,4)==320);
+    assert(ps5_vulkan_texture_width(336,1)==512);
+    assert(ps5_vulkan_texture_width(720,1)==768);
+    for (unsigned bpp=1;bpp<=4;bpp*=2)
+        for (unsigned width=1;width<=4096;width++) {
+            unsigned physical=ps5_vulkan_texture_width(width,bpp);
+            assert(physical>=width && (physical*bpp)%256==0);
+            assert(physical-width < 256/bpp);
+        }
+    const unsigned quad[]''')
+        with tempfile.TemporaryDirectory() as td:
+            path = Path(td)
+            (path / 'strip.c').write_text(code)
+            subprocess.run(['cc', '-O2', '-Wall', '-Werror', str(path / 'strip.c'),
+                            '-o', str(path / 'strip')], check=True)
+            subprocess.run([str(path / 'strip')], check=True)
+        self.assertIn('call.vertices     = output_count; /* patches/series, 0061: effect', source)
+        self.assertIn('call.vertices     = output_count; /* patches/series, 0061: icon', source)
diff --git a/tools/apply-port-patches.py b/tools/apply-port-patches.py
index da12d7f..5f9b406 100755
--- a/tools/apply-port-patches.py
+++ b/tools/apply-port-patches.py
@@ -2150,6 +2150,159 @@ EDITS = [
         "      if (ps5_marks++ < 1) /* patches/series, 0059: once vulkan_menu_staging_ask */",
         "patches/series, 0059: once vulkan_menu_staging_ask",
     ),
+    (
+        "gfx/drivers/vulkan.c",
+        "         draw->backend_data_size          = 2 * sizeof(float);",
+        "         /* patches/series, 0060: libps5vk uses 16-byte UBO records.\n"
+        "          * Preserve the two shader fields and zero the trailing padding. */\n"
+        "         draw->backend_data_size          = 4 * sizeof(float);\n"
+        "         memset(ubo_scratch_data, 0, 4 * sizeof(float));",
+        "patches/series, 0060: libps5vk uses 16-byte UBO records",
+    ),
+    (
+        'gfx/drivers/vulkan.c',
+        '   const bool as_strip = (draw->prim_type == GFX_DISPLAY_PRIM_TRIANGLESTRIP);\n'
+        '   const unsigned source_count = draw->coords->vertices;\n'
+        '   const unsigned output_count =\n'
+        '         (as_strip && source_count >= 3) ? (source_count - 2) * 3 : source_count;\n'
+        '\n'
+        '   if (!vulkan_buffer_chain_alloc(vk->context, &vk->chain->vbo,\n'
+        '            output_count * sizeof(struct vk_vertex), &range))\n'
+        '      return;\n'
+        '\n'
+        '   pv = (struct vk_vertex*)range.data;\n'
+        '   for (i = 0; i < output_count; i++, pv++)\n'
+        '   {\n'
+        '      /* Which source vertex this output vertex is: the first triangle of the\n'
+        '       * strip, then a pair per triangle after it. */\n'
+        '      const unsigned s = as_strip\n'
+        '            ? (i < 3 ? i : 3 + ((i - 3) / 2) * 2 + ((i - 3) % 2 ? 0 : 1))\n'
+        '            : i;\n',
+        '   /* patches/series, 0061: expand every strip triangle with alternating winding. */\n'
+        '   const bool as_strip = (draw->prim_type == GFX_DISPLAY_PRIM_TRIANGLESTRIP);\n'
+        '   const unsigned source_count = draw->coords->vertices;\n'
+        '   const unsigned output_count =\n'
+        '         as_strip ? (source_count >= 3 ? (source_count - 2) * 3 : 0) : source_count;\n'
+        '\n'
+        '   if (!vulkan_buffer_chain_alloc(vk->context, &vk->chain->vbo,\n'
+        '            output_count * sizeof(struct vk_vertex), &range))\n'
+        '      return;\n'
+        '\n'
+        '   pv = (struct vk_vertex*)range.data;\n'
+        '   for (i = 0; i < output_count; i++, pv++)\n'
+        '   {\n'
+        '      /* Triangle t uses t,t+1,t+2, swapping its first pair on odd t. */\n'
+        '      const unsigned s = as_strip\n'
+        '            ? i / 3 + (i % 3 == 2 ? 2 : ((i % 3) ^ ((i / 3) & 1)))\n'
+        '            : i;\n',
+        'patches/series, 0061: expand every strip triangle',
+    ),
+    (
+        'gfx/drivers/vulkan.c',
+        '            call.uniform_size = draw->backend_data_size;\n'
+        '            call.vbo          = &range;\n'
+        '            call.vertices     = draw->coords->vertices;',
+        '            call.uniform_size = draw->backend_data_size;\n'
+        '            call.vbo          = &range;\n'
+        '            call.vertices     = output_count; /* patches/series, 0061: effect vertex count */',
+        'patches/series, 0061: effect vertex count',
+    ),
+    (
+        'gfx/drivers/vulkan.c',
+        '            call.uniform_size = sizeof(math_matrix_4x4);\n'
+        '            call.vbo          = &range;\n'
+        '            call.vertices     = draw->coords->vertices;',
+        '            call.uniform_size = sizeof(math_matrix_4x4);\n'
+        '            call.vbo          = &range;\n'
+        '            call.vertices     = output_count; /* patches/series, 0061: icon vertex count */',
+        'patches/series, 0061: icon vertex count',
+    ),
+    (
+        "gfx/drivers/vulkan.c",
+        "            call.texture      = NULL;\n"
+        "            call.sampler      = VK_NULL_HANDLE;",
+        "            /* patches/series, 0062: populate unused sampler layout slots. */\n"
+        "            call.texture      = &vk->display.blank_texture;\n"
+        "            call.sampler      = vk->samplers.nearest;",
+        "patches/series, 0062: populate unused sampler layout slots",
+    ),
+    (
+        "configuration.c",
+        "   *settings->paths.directory_assets = '\\0';",
+        "   /* patches/series, 0063: the title uses the null platform frontend. */\n"
+        "   strlcpy(settings->paths.directory_assets, \"/app0/assets\",\n"
+        "         sizeof(settings->paths.directory_assets));",
+        "patches/series, 0063: the title uses the null platform frontend",
+    ),
+    (
+        "menu/drivers/xmb.c",
+        "   xmb->font            = gfx_display_font_file(p_disp,",
+        "   /* patches/series, 0063: retain useful XMB startup asset diagnostics. */\n"
+        "   RARCH_LOG(\"[XMB] Icons: %s; font: %s\\n\", iconpath, fontpath);\n"
+        "   xmb->font            = gfx_display_font_file(p_disp,",
+        "patches/series, 0063: retain useful XMB startup asset diagnostics",
+    ),
+    (
+        "menu/drivers/xmb.c",
+        "      xmb_update_dynamic_wallpaper(xmb, true);",
+        "      /* patches/series, 0063: report the actual texture reset result. */\n"
+        "      RARCH_LOG(\"[XMB] Assets missing: %s; fonts ready: %s\\n\",\n"
+        "            xmb->assets_missing ? \"yes\" : \"no\",\n"
+        "            (xmb->font && xmb->font2) ? \"yes\" : \"no\");\n"
+        "      xmb_update_dynamic_wallpaper(xmb, true);",
+        "patches/series, 0063: report the actual texture reset result",
+    ),
+    (
+        "menu/drivers/xmb.c",
+        '#include "../../configuration.h"',
+        '#include "../../configuration.h"\n'
+        '#include "../../verbosity.h" /* patches/series, 0063: XMB asset logger */',
+        "patches/series, 0063: XMB asset logger",
+    ),
+    (
+        'gfx/drivers/vulkan.c',
+        'static void vulkan_transition_texture(',
+        '/* patches/series, 0065: physical rows must be a whole 256 bytes. */\n'
+        'static unsigned ps5_vulkan_texture_width(unsigned width, unsigned bytes_per_pixel)\n'
+        '{\n'
+        '   const unsigned alignment = 256u / bytes_per_pixel;\n'
+        '   return (width + alignment - 1u) & ~(alignment - 1u);\n'
+        '}\n'
+        '\n'
+        'static void vulkan_transition_texture(',
+        'patches/series, 0065: physical rows must',
+    ),
+    (
+        'gfx/drivers/vulkan.c',
+        '      if (info.extent.width % 64u != 0u)\n'
+        '         info.extent.width = (info.extent.width + 63u) & ~63u;',
+        '      /* patches/series, 0065: R8 needs 256 texels, RGBA8 needs 64. */\n'
+        '      info.extent.width = ps5_vulkan_texture_width(width, vulkan_format_to_bpp(format));',
+        'patches/series, 0065: R8 needs',
+    ),
+    (
+        'gfx/drivers/vulkan.c',
+        '      pv->tex_x   = *tex_coord++;',
+        '      /* patches/series, 0065: UVs address the logical region of the padded image. */\n'
+        '      pv->tex_x   = *tex_coord++ * (float)texture->width\n'
+        '            / ps5_vulkan_texture_width(texture->width, vulkan_format_to_bpp(texture->format));',
+        'patches/series, 0065: UVs address',
+    ),
+    (
+        'gfx/drivers/vulkan.c',
+        '   float inv_tex_size_x                   = 1.0f / font->texture.width;',
+        '   /* patches/series, 0065: glyph atlas offsets refer to the physical image. */\n'
+        '   float inv_tex_size_x                   = 1.0f / ps5_vulkan_texture_width(\n'
+        '         font->texture.width, vulkan_format_to_bpp(font->texture.format));',
+        'patches/series, 0065: glyph atlas offsets',
+    ),
+    (
+        'gfx/drivers/vulkan.c',
+        '         info.mipLevels     = vulkan_num_miplevels(width, height);',
+        '         /* patches/series, 0066: single-level menu images until mip sampling is verified. */\n'
+        '         info.mipLevels     = 1;',
+        'patches/series, 0066: single-level menu images',
+    ),
 ]
 
 
diff --git a/tools/build-retroarch.sh b/tools/build-retroarch.sh
index 2f21531..ec1b83e 100755
--- a/tools/build-retroarch.sh
+++ b/tools/build-retroarch.sh
@@ -43,13 +43,9 @@ tree="$root/build/ra-conf"
 # earlier version of this script left one there: a generated file, dirty in git,
 # that no source read. The include path does the work instead.
 configured="$tree/config.h"
-if [[ ! -f $configured ]]; then
-    # One command to build: if the configured tree is not there yet, make it. The
-    # ordering (configure before compiling) is a property of RetroArch, not
-    # something a caller should have to know.
-    echo "==> [ra] no configured tree yet; running tools/retroarch-sources.sh"
-    "$root/tools/retroarch-sources.sh" >/dev/null
-fi
+# Refresh configuration before deriving feature flags. The source script caches
+# by configure arguments so enabling a menu cannot reuse the old disabled build.
+"$root/tools/retroarch-sources.sh" >/dev/null
 [[ -f $configured ]] || { echo "error: configure did not produce build/ra-conf/config.h" >&2; exit 2; }
 
 # The -D flags are not written here. RetroArch passes each enabled feature on the
@@ -110,6 +106,7 @@ defines+=(
     # is zstd's own switch for a platform without weak symbols, which is what this
     # is as far as the stub table is concerned.
     -DZSTD_TRACE=0
+    # platform_unix appends /assets to ASSETS_DIR, so its prefix must be /app0.
     # Where this title's own files live. configure baked the /user/homebrew
     # prefix from tools/retroarch-sources.sh's --prefix, and tools/retroarch-flags.sh
     # drops those four flags rather than passing a path that does not exist here:
@@ -118,7 +115,7 @@ defines+=(
     # copy shipped inside the title; the paths RetroArch would write to point at
     # /app0 as well, because that is the only place it may write.
     -DGLOBAL_CONFIG_DIR='"/app0"'
-    -DASSETS_DIR='"/app0/assets"'
+    -DASSETS_DIR='"/app0"'
     -DFILTERS_DIR='"/app0/filters"'
     -DCORE_INFO_DIR='"/app0/info"'
 )
diff --git a/tools/retroarch-sources.sh b/tools/retroarch-sources.sh
index 752a71d..21477c5 100755
--- a/tools/retroarch-sources.sh
+++ b/tools/retroarch-sources.sh
@@ -31,9 +31,9 @@ sdk="${PS5_PAYLOAD_SDK:-$root/../ps5-native-app-boilerplate-main/.deps/native/ps
 
 configure_flags=(
     --prefix=/user/homebrew
-    # The menu, and only the menu that needs no GPU display context.
-    --enable-menu --enable-rgui
-    --disable-materialui --disable-xmb --disable-ozone --disable-gfx_widgets
+    # XMB is the compiled default when enabled; retain RGUI as a menu fallback.
+    --enable-menu --enable-xmb --enable-rgui
+    --disable-materialui --disable-ozone --disable-gfx_widgets
     # Vulkan is ON. ../PS5_Vulkan is the graphics backend this project consumes
     # (docs/PLAN.md, M2 and the "no direct hardware access" invariant), and the
     # path to it is now measured rather than assumed:
@@ -121,7 +121,8 @@ fi
 [[ -d $upstream ]] || { echo "error: run tools/fetch-retroarch.sh first" >&2; exit 2; }
 [[ -d $sdk ]] || { echo "error: no SDK at $sdk" >&2; exit 2; }
 
-if [[ ! -f $work/config.mk || ! -f $work/config.h ]]; then
+configure_id=$(printf '%s\n' "${configure_flags[@]}" | sha256sum | cut -d' ' -f1)
+if [[ ! -f $work/config.mk || ! -f $work/config.h || ! -f $work/.configure-id || $(<"$work/.configure-id") != "$configure_id" ]]; then
     echo "==> [sources] configuring RetroArch in build/ra-conf (vendor/ is untouched)" >&2
     rm -rf "$work"
     mkdir -p "$(dirname "$work")"
@@ -146,6 +147,7 @@ if [[ ! -f $work/config.mk || ! -f $work/config.h ]]; then
         export OS=BSD DISTRO=
         ./configure "${configure_flags[@]}" >"$work/configure.log" 2>&1
     ) || { echo "error: configure failed; see $work/configure.log" >&2; exit 2; }
+    printf '%s\n' "$configure_id" > "$work/.configure-id"
 fi
 
 objects="$work/.rarch-obj"