From 4b0aff7b79c93b298071a223cca1295da95b2f4a Mon Sep 17 00:00:00 2001
From: Brian Ward <bward@flatironinstitute.org>
Date: Thu, 23 Oct 2025 14:07:29 -0400
Subject: [PATCH 1/3] Remove windows-2022/julia workaround

---
 .github/workflows/main.yml | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 2db9386..ccfb6ba 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -44,9 +44,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # windows-2022 is a workaround for a julia issue as of 10/23/2025
-        # https://github.com/JuliaLang/julia/issues/59931
-        os: [windows-2022, ubuntu-latest, macos-latest]
+        os: [windows-latest, ubuntu-latest, macos-latest]
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     steps:
@@ -80,7 +78,7 @@ jobs:
     runs-on: ${{matrix.os}}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-2022]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ["3.9", "3"]
       fail-fast: false
     steps:
@@ -135,7 +133,7 @@ jobs:
     runs-on: ${{matrix.os}}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-2022]
+        os: [ubuntu-latest, macos-latest, windows-latest]
       fail-fast: false
     steps:
       - name: Check out github
@@ -169,7 +167,7 @@ jobs:
           key: ${{ hashFiles('**/*.stan', 'src/*', 'stan/src/stan/version.hpp', 'Makefile') }}-${{ matrix.os }}-v${{ env.CACHE_VERSION }}
 
       - name: Run tests
-        if: matrix.os != 'windows-2022'
+        if: matrix.os != 'windows-latest'
         run: |
           cd clients/R
           Rscript -e "devtools::test(reporter = c(\"summary\", \"fail\"))"
@@ -177,7 +175,7 @@ jobs:
           TINYSTAN: ${{ github.workspace }}
 
       - name: Run tests (windows)
-        if: matrix.os == 'windows-2022'
+        if: matrix.os == 'windows-latest'
         run: |
           cd clients/R
           Rscript -e 'devtools::test(reporter = c("summary", "fail"))'
@@ -190,7 +188,7 @@ jobs:
     runs-on: ${{matrix.os}}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-2022]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         julia-version: ["1"]
       fail-fast: false
     steps:

From 7602be9e155fff5ce969ade784cc1f5ac91c7fec Mon Sep 17 00:00:00 2001
From: Brian Ward <bward@flatironinstitute.org>
Date: Tue, 28 Oct 2025 12:37:09 -0400
Subject: [PATCH 2/3] cache version

---
 .github/workflows/main.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ccfb6ba..b915c8d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,7 +8,7 @@ on:
   workflow_dispatch: {}
 
 env:
-  CACHE_VERSION: 5
+  CACHE_VERSION: 7
 
 # only run one copy per PR
 concurrency:

From e61cfa425c50bf519842e23bef782db4a1f342fe Mon Sep 17 00:00:00 2001
From: Brian Ward <bward@flatironinstitute.org>
Date: Fri, 14 Nov 2025 15:06:57 -0500
Subject: [PATCH 3/3] Cache version

---
 .github/workflows/main.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b915c8d..10db304 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,7 +8,7 @@ on:
   workflow_dispatch: {}
 
 env:
-  CACHE_VERSION: 7
+  CACHE_VERSION: 8
 
 # only run one copy per PR
 concurrency: