ci: Run validation job on Linux, macOS, Windows

Signed-off-by: James Alseth <[email protected]>

Author: jalseth

.github/workflows/pr.yaml

@@ -19,10 +19,21 @@ jobs:
         ref: ${{ github.event.pull_request.head.sha }}
         fetch-depth: ${{ github.event.pull_request.commits }}
 
+    - name: setup go
+      uses: actions/setup-go@v6
+      with:
+        go-version: "1.25.x"
+        cache: false
+
     - name: validate conventional commit prefix
       working-directory: scripts
       run: ./validate-conventional-commit-prefix.sh
 
+    - name: golangci-lint
+      uses: golangci/golangci-lint-action@v8
+      with:
+        args: --timeout=5m --color=always --max-same-issues=0 --max-issues-per-linter=0
+
     - name: setup regal
       uses: StyraInc/setup-regal@v1
       with:
@@ -46,7 +57,13 @@ jobs:
         --format github
 
   validate:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os:
+          - 'ubuntu-latest'
+          - 'macos-latest'
+          - 'windows-latest'
+    runs-on: ${{ matrix.os }}
     steps:
       - name: checkout source
         uses: actions/checkout@v5
@@ -57,11 +74,6 @@ jobs:
           go-version: "1.25.x"
           cache: false
 
-      - name: golangci-lint
-        uses: golangci/golangci-lint-action@v8
-        with:
-          args: --timeout=5m --color=always --max-same-issues=0 --max-issues-per-linter=0
-
       - name: build
         run: make build