Function install_input_primitives 

pub fn install_input_primitives<H: 'static>(
    interp: &mut Interpreter<H>,
    inputs: Inputs,
)

Install the reading primitives against inputs.

Two, and no more:

• input(name) — the declared bytes as a string.
• definput(name, hash) — a no-op at run time. The declaration is consumed by declarations before evaluation; this exists so the form is not an unbound symbol, and returns the name so it reads as a value.

There is deliberately no inputs(), no input_path(), and no read_file(). Each would hand back the ambient authority this removes.