I can't remember where I originally got this from, but it works a treat, and I see it requested a fair bit.
All it does is increases the cost of Spies to 10,000 (higher than that and it seems to bug Civ6 out...), and puts the AI interest in spies to zero. Effectively, it removes the spying mechanic from the game (unless you want to spend 600+ turns building a spy, but try to resist!)
Still works with GS as far as I can tell. Added compatibility strings for 1.0 and 2.0.
No Spies 1.01
No more spies!
- Missed government building grants. May 18, 2019