From 323ecd5cf0b8b4a64dcc0eafcc210c4df52c9a54 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 24 Jun 2026 03:39:10 +0000
Subject: [PATCH 1/2] Implement install_slang_compiler() in ci.py

---
 .github/workflows/ci.py | 38 ++++++++++++++++++++++++++++++++++----
 1 file changed, 34 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/ci.py b/.github/workflows/ci.py
index 578b5d672..2bc5899ec 100644
--- a/.github/workflows/ci.py
+++ b/.github/workflows/ci.py
@@ -4,8 +4,10 @@
 
 import glob
 import io
+import json
 import lzma
 import os
+import platform
 import shlex
 import shutil
 import subprocess
@@ -101,10 +103,38 @@ def install_fonts() -> None:
 
 
 def install_slang_compiler() -> None:
-    # TODO: Install the latest slang compiler binary release from https://github.com/shader-slang/slang
-    # It needs to be installed so that we can use the header files and
-    # libraries via pkgconf
-    ...
+    os_name = 'macos' if is_macos else 'linux'
+    machine = platform.machine().lower()
+    arch = 'aarch64' if machine in ('aarch64', 'arm64') else 'x86_64'
+
+    api_req = Request(
+        'https://api.github.com/repos/shader-slang/slang/releases/latest',
+        headers={'Accept': 'application/vnd.github+json', 'X-GitHub-Api-Version': '2022-11-28'},
+    )
+    release = json.loads(download_with_retry(api_req))
+    version = release['tag_name'].lstrip('v')
+
+    asset_name = f'slang-{version}-{os_name}-{arch}.tar.gz'
+    url = ''
+    for asset in release['assets']:
+        if asset['name'] == asset_name:
+            url = asset['browser_download_url']
+            break
+    if not url:
+        raise SystemExit(f'Could not find slang release asset: {asset_name}')
+
+    install_dir = '/tmp/slang'
+    os.makedirs(install_dir, exist_ok=True)
+    data = download_with_retry(url)
+    with tarfile.open(fileobj=io.BytesIO(data), mode='r:gz') as tf:
+        try:
+            tf.extractall(install_dir, filter='fully_trusted')
+        except TypeError:
+            tf.extractall(install_dir)
+
+    pc_dir = os.path.join(install_dir, 'lib', 'pkgconfig')
+    pp = os.environ.get('PKG_CONFIG_PATH', '')
+    os.environ['PKG_CONFIG_PATH'] = f'{pc_dir}:{pp}' if pp else pc_dir
 
 
 def install_deps() -> None:

From f80a36e42eeac7a2488aa5743333ed348ce3dd21 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 24 Jun 2026 03:40:53 +0000
Subject: [PATCH 2/2] Address code review: use url=None, add TypeError comment

---
 .github/workflows/ci.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.py b/.github/workflows/ci.py
index 2bc5899ec..e9c9bad5b 100644
--- a/.github/workflows/ci.py
+++ b/.github/workflows/ci.py
@@ -115,12 +115,12 @@ def install_slang_compiler() -> None:
     version = release['tag_name'].lstrip('v')
 
     asset_name = f'slang-{version}-{os_name}-{arch}.tar.gz'
-    url = ''
+    url = None
     for asset in release['assets']:
         if asset['name'] == asset_name:
             url = asset['browser_download_url']
             break
-    if not url:
+    if url is None:
         raise SystemExit(f'Could not find slang release asset: {asset_name}')
 
     install_dir = '/tmp/slang'
@@ -130,6 +130,7 @@ def install_slang_compiler() -> None:
         try:
             tf.extractall(install_dir, filter='fully_trusted')
         except TypeError:
+            # filter parameter not supported on older Python versions
             tf.extractall(install_dir)
 
     pc_dir = os.path.join(install_dir, 'lib', 'pkgconfig')