1. Cython compile system build. 2. License system build. 3. Auto md file generation for Sphinx build.

mxpic/core/generate_license.py

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+import hmac
+import hashlib
+import json
+from datetime import datetime, timedelta
+
+# This is your master key. NEVER share this or put it in public code.
+SECRET_KEY = b"mxPIC_Super_Secret_Master_Key_2026!"
+
+def generate_license(mac_address: str, days_valid: int, output_file: str = "mxpic.lic"):
+    """Generates a cryptographically signed license file."""
+    
+    # Calculate the expiration date
+    expiration = (datetime.now() + timedelta(days=days_valid)).strftime("%Y-%m-%d")
+    
+    # Create the payload message we want to sign
+    message = f"{mac_address}|{expiration}".encode('utf-8')
+    
+    # Generate the unforgeable signature using HMAC + SHA256
+    signature = hmac.new(SECRET_KEY, message, hashlib.sha256).hexdigest()
+    
+    # Create the license dictionary
+    license_data = {
+        "mac_address": mac_address,
+        "expiration": expiration,
+        "signature": signature
+    }
+    
+    # Save to file
+    with open(output_file, "w") as f:
+        json.dump(license_data, f, indent=4)
+    
+    # 
+    print(f"✅ License generated for MAC {mac_address}")
+    print(f"✅ Expires on {expiration}")
+    print(f"✅ Saved to {output_file}")
+
+if __name__ == "__main__":
+    # Example: Customer sends MAC "A1:B2:C3:D4:E5:F6", they bought a 1-year license
+    generate_license("D4:54:8B:F1:46:49", days_valid=365,output_file="mxpic.lic")