Network automation systems, and methods of implementing planned changes to a network infrastructure are provided. A network automation system includes software configured to model a manual change of the planned change and identify a conflict between the manual change and another change of the planned change. The system also includes a policy module configured to verify that the changes of the planned change conform to a policy. The system further includes a device proxy configured to allow a user to implement the manual change. An exemplary method for implementing the planned changes includes modeling a manual change of the planned change, checking for a conflict between the manual change and another change, and implementing the planned change. The method can also include verifying that the manual change complies with a policy.