This mod was made possible thanks to the new Scripted GUI system created by PDX developer shultays, please check his tutorials on PDX HOI4 forums if you want to add GUI features to your mod.
Features:
Recruit Spies: Build Recruitment Offices to recruit new spies for you on a daily basis (Recruitment capped at 5 per day. You can now build the recruitment offices by selecting a state and click on the button under the resistance tab. This is intended to make the mod more compatible with other mods).
Engage in Covert Warfare: 14 Covert Actions you can perform on other nations, viewable in the diplomacy view of the selected country. (e.g: Sabotage Aviation Radars, Disrupt Military Industry, Sow Political Discontent etc..)
Investigate Foreign Activities on your soil You have the option to try to find out who's performing such activities on your soil, for a political power cost.
Assign Spies to Local Missions: Assign some of your available spies to local missions, such as increasing war propaganda.
Level Up your Spy Director: Level Up your Director, using Spy XP, to unlock new abilities for your Spies.
Infiltrate a Target of your choice: Infiltrate a nation of your choice to get daily reports on their military and industrial data, viewable in your Agency Headquarters.
Study Enemy Technology: Assign spies to study technology of your Infiltration Target. Once enough Research Points are gained from your target, you can use them to copy Enemy Unit Models for your use.
Arm The Resistance: Arm Resistance in enemy occupied territories and select a target for them to disrupt (infrastructure, radars or airbases) (click on the arm resistance button next to resistance bar in state view)