diff --git a/scripts/cross_repo_test.py b/scripts/cross_repo_test.py
new file mode 100644
index 00000000..92c9c78d
--- /dev/null
+++ b/scripts/cross_repo_test.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+"""
+[OPS] Cross-Repo Test Suite
+Part of the Gemini Sovereign Infrastructure Suite.
+
+Verifies the fleet works as a system by running tests across all core repositories.
+"""
+
+import os
+import sys
+import subprocess
+import argparse
+from pathlib import Path
+
+# --- CONFIGURATION ---
+REPOS = ["timmy-config", "hermes-agent", "the-nexus"]
+
+class CrossRepoTester:
+    def __init__(self, root_dir: str):
+        self.root_dir = Path(root_dir).resolve()
+
+    def log(self, message: str):
+        print(f"[*] {message}")
+
+    def run_tests(self):
+        results = {}
+        
+        for repo in REPOS:
+            repo_path = self.root_dir / repo
+            if not repo_path.exists():
+                # Try sibling directory if we are in one of the repos
+                repo_path = self.root_dir.parent / repo
+                
+            if not repo_path.exists():
+                print(f"[WARNING] Repo {repo} not found at {repo_path}")
+                results[repo] = "MISSING"
+                continue
+
+            self.log(f"Running tests for {repo}...")
+            
+            # Determine test command
+            test_cmd = ["pytest"]
+            if repo == "hermes-agent":
+                test_cmd = ["python3", "-m", "pytest", "tests"]
+            elif repo == "the-nexus":
+                test_cmd = ["pytest", "tests"]
+            
+            try:
+                # Check if pytest is available
+                subprocess.run(["pytest", "--version"], capture_output=True)
+                
+                res = subprocess.run(test_cmd, cwd=str(repo_path), capture_output=True, text=True)
+                if res.returncode == 0:
+                    results[repo] = "PASSED"
+                else:
+                    results[repo] = "FAILED"
+                    # Print a snippet of the failure
+                    print(f"  [!] {repo} failed tests. Stderr snippet:")
+                    print("\n".join(res.stderr.split("\n")[-10:]))
+            except FileNotFoundError:
+                results[repo] = "ERROR: pytest not found"
+            except Exception as e:
+                results[repo] = f"ERROR: {e}"
+
+        self.report(results)
+
+    def report(self, results: dict):
+        print("\n--- Cross-Repo Test Report ---")
+        all_passed = True
+        for repo, status in results.items():
+            icon = "✅" if status == "PASSED" else "❌"
+            print(f"{icon} {repo:<15} | {status}")
+            if status != "PASSED":
+                all_passed = False
+                
+        if all_passed:
+            print("\n[SUCCESS] All systems operational. The fleet is sound.")
+        else:
+            print("\n[FAILURE] System instability detected.")
+
+def main():
+    parser = argparse.ArgumentParser(description="Gemini Cross-Repo Tester")
+    parser.add_argument("--root", default=".", help="Root directory containing all repos")
+    args = parser.parse_args()
+    
+    tester = CrossRepoTester(args.root)
+    tester.run_tests()
+
+if __name__ == "__main__":
+    main()