ci: stop building 32-bit (Windows, Linux) and Intel Mac Studio

Those targets still build locally with scripts/build-studio.sh; releases now carry
Windows x64/arm64, Linux x64/arm64 and macOS arm64. Studio's updater already skips a
release with no file for its computer.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.github/workflows/build.yml

@@ -32,8 +32,6 @@ jobs:
       matrix:
         include:
           - { arch: x64, runner: ubuntu-24.04, extra: "" }
-          - { arch: x86, runner: ubuntu-24.04, i386: true,
-              extra: "gcc-multilib g++-multilib libx11-dev:i386 libxrandr-dev:i386 libxinerama-dev:i386 libxcursor-dev:i386 libxi-dev:i386" }
           - { arch: arm64, runner: ubuntu-24.04-arm, extra: "" }
     runs-on: ${{ matrix.runner }}
     timeout-minutes: 45
@@ -65,8 +63,6 @@ jobs:
           path: build/frame-home/payload
       - name: Tools and X11 headers
         run: |
-          # x86 links against 32-bit X11, so apt needs the i386 packages too
-          if [ "${{ matrix.i386 }}" = "true" ]; then sudo dpkg --add-architecture i386; fi
           sudo mkdir -p "$APT_CACHE_DIR/archives/partial"
           sudo chown _apt:root "$APT_CACHE_DIR/archives/partial"
           sudo apt-get update
@@ -88,7 +84,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        arch: [x64, x86, arm64]
+        arch: [x64, arm64]
     runs-on: windows-latest
     timeout-minutes: 45
     steps:
@@ -125,9 +121,6 @@ jobs:
       matrix:
         include:
           - { arch: arm64, runner: macos-14 }
-          # Intel: macos-13 was retired (Dec 2025); macos-15-intel is GitHub's last Intel Mac runner (until Aug 2027).
-          # Not cross-built on an ARM Mac because Homebrew's MoltenVK, bundled into the app, is the runner's own arch.
-          - { arch: x64, runner: macos-15-intel }
     runs-on: ${{ matrix.runner }}
     timeout-minutes: 45
     env:

README.md

@@ -25,18 +25,15 @@ top bar, and Frame Home updates from the Environments panel on the headset. Both
 | Computer | Frame Studio |
 |---|---|
 | Windows, 64-bit PCs | `FrameStudio-windows-x64.zip` |
-| Windows, 32-bit | `FrameStudio-windows-x86.zip` |
 | Windows on ARM (Snapdragon, Surface Pro X...) | `FrameStudio-windows-arm64.zip` |
 | Linux, 64-bit PCs | `FrameStudio-linux-x64.tar.gz` |
-| Linux, 32-bit | `FrameStudio-linux-x86.tar.gz` |
 | Linux on ARM (Raspberry Pi 5, ARM laptops, the Steam Frame's desktop) | `FrameStudio-linux-arm64.tar.gz` |
 | Mac with Apple Silicon (M1 and later) | `FrameStudio-macos-arm64.zip` |
-| Mac with Intel | `FrameStudio-macos-x64.zip` |
 | Frame Home only, installed from any computer | `FrameHome-installer.zip` |
 
 Studio needs a GPU with Vulkan 1.2: any recent NVIDIA, AMD or Intel driver on Windows and Linux. On a Mac, Vulkan
-runs on Metal through MoltenVK, which comes inside the app. The 32-bit builds have at most 4 GB to work in, so the
-very largest homes may not fit.
+runs on Metal through MoltenVK, which comes inside the app. 32-bit Windows and Linux and Intel Macs have no ready-made
+download; Studio can still be built for them from source ([docs/building.md](docs/building.md)).
 
 See [Installing Frame Home](docs/install-frame-home.md) for how to install the runtime on a Steam Frame.
 

docs/building.md

@@ -118,7 +118,7 @@ rolling `latest` release and one shared `v*` tag namespace; each release contain
 
 | When | What happens |
 |---|---|
-| Every push and pull request | Studio builds for Linux, Windows and macOS; Frame Home is built on ARM64 and bundled into Studio packages. Successful outputs are kept as run artifacts. |
+| Every push and pull request | Studio builds for Linux (x64, arm64), Windows (x64, arm64) and macOS (Apple Silicon); Frame Home is built on ARM64 and bundled into Studio packages. Successful outputs are kept as run artifacts. 32-bit and Intel Mac builds are local only (`scripts/build-studio.sh`). |
 | A push to `main` | The **Latest build** pre-release is replaced with Studio builds and the standalone Frame Home installer. |
 | A tag starting with `v` (for example `v1.0`) | One version release is published with both Studio packages and the Frame Home installer. |
 | By hand | **Actions > build > Run workflow** |

docs/getting-started.md

@@ -26,12 +26,13 @@ walk, add seats, sounds and a picture, save the result as a `.fenv` environment,
 | | Requirement |
 |---|---|
 | Graphics | A GPU with Vulkan 1.2. Any recent NVIDIA, AMD or Intel driver on Windows and Linux. |
-| Windows | Windows 10 or 11. 64-bit (x64), 32-bit (x86) or ARM64. |
-| Linux | 64-bit (x64), 32-bit (x86) or ARM64, with an X11 desktop or XWayland. |
-| macOS | macOS 11 or later on Apple Silicon. macOS 10.15 or later on Intel. Vulkan runs on Metal through MoltenVK, which is inside the app. |
+| Windows | Windows 10 or 11, 64-bit (x64) or ARM64. |
+| Linux | 64-bit (x64) or ARM64, with an X11 desktop or XWayland. |
+| macOS | macOS 11 or later on Apple Silicon. Vulkan runs on Metal through MoltenVK, which is inside the app. |
 | Headset | A Steam Frame with developer mode and SSH turned on, on the same network as your computer. See [headset-setup.md](headset-setup.md). |
 
-The 32-bit builds can use at most 4 GB of memory. The very largest homes may not fit.
+32-bit Windows and Linux and Intel Macs have no ready-made download. You can still build Studio for them yourself:
+see [building.md](building.md). A 32-bit build can use at most 4 GB of memory, so the very largest homes may not fit.
 
 You do not need Studio to use Frame Home. If you only want to install Frame Home and copy ready-made `.fenv` files,
 see [install-frame-home.md](install-frame-home.md).
@@ -48,13 +49,10 @@ see [install-frame-home.md](install-frame-home.md).
 | Computer | File |
 |---|---|
 | Windows, 64-bit PCs | `FrameStudio-windows-x64.zip` |
-| Windows, 32-bit | `FrameStudio-windows-x86.zip` |
 | Windows on ARM | `FrameStudio-windows-arm64.zip` |
 | Linux, 64-bit PCs | `FrameStudio-linux-x64.tar.gz` |
-| Linux, 32-bit | `FrameStudio-linux-x86.tar.gz` |
 | Linux on ARM | `FrameStudio-linux-arm64.tar.gz` |
 | Mac with Apple Silicon (M1 and later) | `FrameStudio-macos-arm64.zip` |
-| Mac with Intel | `FrameStudio-macos-x64.zip` |
 | Frame Home only (no Studio) | `FrameHome-installer.zip` |
 
 Builds of other branches are not on the Releases page. You find them under **Actions**: open the run, then scroll