diff --git a/AGENTS.md b/AGENTS.md
index eabea7e..27af7a8 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -6,6 +6,7 @@ MoQ Studio is a native, cross-platform streaming studio that composites scenes o
 # Required
 
 - Measure performance by frame time, GPU copies, and encoder load.
+- Measure the UI's frame time under a real compositor, such as headless sway (`WLR_BACKENDS=headless sway`), not Xvfb, whose present caps it at 12–25 fps on the NVIDIA test hosts.
 
 # Upstream
 
diff --git a/quest/m0/README.md b/quest/m0/README.md
index df2f874..2d8b6d0 100644
--- a/quest/m0/README.md
+++ b/quest/m0/README.md
@@ -100,7 +100,6 @@ repository.
 - [Web studio](/quest/m0/web.md) - the full studio in wasm on WebGPU and WebCodecs, served from this repository
 - [Virtual camera](/quest/m0/vcam/README.md) - the program or a published scene exposed as a system camera on Linux, Windows, and macOS
 - [Browser sources on the GPU under Mesa](/quest/m0/cef-headless.md) - shared-texture pages paint on Intel and AMD under Wayland, and a page that cannot paint fails loudly
-- [The UI keeps its frame rate while the program renders](/quest/m0/ui-frame-rate.md) - the editor draws without waiting on the program's render
 - [The Apple signing identity is available](/quest/m0/signing.md) - the Apple credentials packaging and the macOS camera need; Windows ships unsigned
 - [Packaging](/quest/m0/packaging.md) - a signed macOS app, a Windows installer, and a Flatpak for Linux
 - [The persistable portal restore token is pinned](/quest/m0/pin-portal-token.md) - moq-video's restore token, for Wayland sources
diff --git a/quest/m0/ui-frame-rate.md b/quest/m0/ui-frame-rate.md
deleted file mode 100644
index 101d2ea..0000000
--- a/quest/m0/ui-frame-rate.md
+++ /dev/null
@@ -1,27 +0,0 @@
-# [M] The UI keeps its frame rate while the program renders
-
-## Goal
-
-The studio's UI draws its frames without waiting on the program's render, so
-the editor stays as smooth as the display allows while the studio publishes
-or records.
-
-## Plan
-
-From [moq-dev/studio#85](https://github.com/moq-dev/studio/pull/85), picked
-2026-11-07 (maintainer away under /afk, recommended option), m0 by the rule
-that fixes join m0.
-
-#85 measured the UI at about 25 fps (40 ms a frame) with effects Full,
-Reduced, and Off alike, while the program rendered in about 19 ms, on
-`nixos`'s RTX 3070 Ti under Xvfb at 1440x900. The UI's own CPU work was
-under 2 ms. Its unprofiled guess is that the UI waits on `engine.state`'s
-lock while the program renders.
-
-- Profile first, on a real display as well as Xvfb, since Xvfb's
-  presentation may account for some of it. Report frame time, where the UI
-  thread waits, and GPU queue contention between the UI and the compositor.
-- Fix the cause found, such as holding `engine.state` only to copy what a
-  frame draws, or keeping the compositor's submit off the UI's path. If the
-  wait is only Xvfb's, record that in the PR and delete this quest.
-- Show the program's render time and encoder load are unchanged.