This is the wild west. No apologies, just don't set your expectations too high.
Isolated files that can be run directly once they are given execution permissions with chmod +x script_path and are added to the PATH.
#! /usr/bin/env zsh
#! /usr/bin/env -S uv run --script
#! /usr/bin/env python3
#! /usr/bin/env swiftBinary files are compiled for apple silicon from the adjacent script
swift-tool # binary
swift-tool.swift # script