feat: add QPK_PIN consistency check to CI

.github/workflows/ci.yml

@@ -85,6 +85,10 @@ jobs:
           python -m pip install --no-deps -e external/QuantPlatformKit -e external/UsEquityStrategies
 
       - name: Run ruff
+
+      - name: Check QPK pin consistency
+        run: python scripts/check_qpk_pin_consistency.py
+        continue-on-error: true
         run: |
           set -euo pipefail
           ruff check .

scripts/check_qpk_pin_consistency.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+"""Check that all QPK git references match the canonical QPK_PIN.
+Usage: python scripts/check_qpk_pin_consistency.py [--fix]
+"""
+import re, subprocess, sys
+from pathlib import Path
+
+QPK_PIN_URL = "https://raw.githubusercontent.com/QuantStrategyLab/QuantPlatformKit/main/QPK_PIN"
+SHA_RE = re.compile(r"@([a-f0-9]{40})")
+
+def fetch_pin() -> str:
+    import urllib.request
+    with urllib.request.urlopen(QPK_PIN_URL, timeout=10) as r:
+        sha = r.read().decode().strip().split()[0]
+    if len(sha) == 40: return sha
+    raise RuntimeError(f"Invalid QPK_PIN: {sha}")
+
+def main():
+    fix = "--fix" in sys.argv
+    target = fetch_pin()
+    print(f"QPK_PIN: {target[:12]}...")
+    errors = 0
+    for path in sorted(Path.cwd().glob("**/requirements*.txt")) + sorted(Path.cwd().glob("**/pyproject.toml")):
+        if "external" in str(path): continue
+        content = path.read_text()
+        for m in SHA_RE.finditer(content):
+            sha = m.group(1)
+            if "QuantPlatformKit" not in content[max(0,m.start()-200):m.end()]: continue
+            if sha != target:
+                errors += 1
+                print(f"  ❌ {path}: QPK@{sha[:12]} (expected {target[:12]})")
+                if fix:
+                    path.write_text(content.replace(sha, target))
+                    print(f"     → fixed")
+    if errors:
+        print(f"\n{errors} mismatch(es). Run with --fix to auto-fix.")
+        return 1
+    print("✅ All QPK pins match.")
+    return 0
+
+if __name__ == "__main__":
+    raise SystemExit(main())