I don't know exactly what you mean when you say that an our binding "respects scope".

I do see that the declaration and definition of $var is at file scope. My understanding is that "package Bar" changes the package from Foo to Bar. Maybe I'm confusing "change of package" with "change of scope"?

I see that the following works as I'd expect:

#!/usr/bin/env perl

use Modern::Perl;

{
    package Foo;

    our $var = 42;  # This is $Foo::var.
}

{
    package Bar;

    # This works, as expected.
    say "\$Foo::var: $Foo::var";

    #say "\$var: $var";  # Fails, as expected.
}

#say "\$var: $var";  # Fails, as expected.

say "\$Foo::var: $Foo::var";
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Does that look like the correct way to keep packages separate in a single file?

(I realize that everything would also work as expected if I kept each package in its own module. And it would make them easily testable as well.)