Most of it doesn't. Take a look at net/http. I'm not aware of anything it does that your package could not. Certainly nothing that would move the needle on succinctness.
The std lib is disciplined about using safe Go ideas except in the exceptional cases. I feel like it’s nothing that is enforced by the formal spec of the language, just that the std lib has an exceptional emphasis on making it really hard to walk away with misconceptions.
