Force Apple Silicon MATLAB arch in CI parity workflows

Author: iahncajigas

.github/workflows/matlab-parity-gate.yml

@@ -22,6 +22,7 @@ jobs:
       AGENT_TOOLSDIRECTORY: /Users/iahncajigas/actions-runner/_work/_tool
       RUNNER_TEMP: /Users/iahncajigas/actions-runner/_work/_temp
       TMPDIR: /Users/iahncajigas/actions-runner/_work/_temp
+      NSTAT_MATLAB_EXTRA_ARGS: -maca64
     steps:
       - name: Prepare runner directories
         run: |
@@ -33,7 +34,7 @@ jobs:
           lfs: true
 
       - name: MATLAB smoke preflight
-        run: /Applications/MATLAB_R2025b.app/bin/matlab -batch "disp(version); exit"
+        run: /Applications/MATLAB_R2025b.app/bin/matlab -maca64 -batch "disp(version); exit"
 
       - name: Pull LFS Objects
         run: git lfs pull

.github/workflows/matlab-smoke.yml

@@ -12,4 +12,4 @@ jobs:
     runs-on: [self-hosted, macOS]
     steps:
       - name: Print MATLAB version
-        run: /Applications/MATLAB_R2025b.app/bin/matlab -batch "disp(version); exit"
+        run: /Applications/MATLAB_R2025b.app/bin/matlab -maca64 -batch "disp(version); exit"

python/tools/verify_python_vs_matlab_similarity.py

@@ -4,6 +4,7 @@
 import importlib
 import json
 import math
+import os
 import re
 import shutil
 import subprocess
@@ -18,6 +19,7 @@
 REPO_ROOT = Path(__file__).resolve().parents[2]
 REPORT_DIR = REPO_ROOT / "python" / "reports"
 MATLAB_BIN = Path("/Applications/MATLAB_R2025b.app/bin/matlab")
+MATLAB_EXTRA_ARGS = [arg for arg in os.environ.get("NSTAT_MATLAB_EXTRA_ARGS", "").split() if arg]
 TOC_PATH = REPO_ROOT / "helpfiles" / "helptoc.xml"
 PY_ROOT = REPO_ROOT / "python"
 if str(PY_ROOT) not in sys.path:
@@ -64,6 +66,10 @@
 }
 
 
+def _matlab_batch_command(batch_cmd: str) -> list[str]:
+    return [str(MATLAB_BIN), *MATLAB_EXTRA_ARGS, "-batch", batch_cmd]
+
+
 def _normalize_key(s: str) -> str:
     return re.sub(r"[^a-z0-9]", "", s.lower())
 
@@ -181,7 +187,7 @@ def _matlab_class_checks(timeout_s: int = 180) -> dict[str, Any]:
 
     try:
         cp = subprocess.run(
-            [str(MATLAB_BIN), "-batch", cmd],
+            _matlab_batch_command(cmd),
             cwd=str(REPO_ROOT),
             capture_output=True,
             text=True,
@@ -329,7 +335,7 @@ def run_script_path(path: Path, timeout: int, source_label: str | None = None) -
         t0 = time.time()
         try:
             cp = subprocess.run(
-                [str(MATLAB_BIN), "-batch", cmd],
+                _matlab_batch_command(cmd),
                 cwd=str(REPO_ROOT),
                 capture_output=True,
                 text=True,