Lots of things that are "fundamental" in the sense I think you mean are not in the core: documentation, types, eventspaces. The building blocks of sandboxing, such as custodians and security guards and inspectors, are in the core. Sam <div class="gmail_quote">On Jun 26, 2013 8:47 AM, "Matthias Felleisen" <<a href="mailto:matthias@ccs.neu.edu">matthias@ccs.neu.edu</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> In general I agree with Robby on "the definition of the core as "minimum stuff to get pkgs running" and we should be picky about what goes in". BUT, as a small addendum, I think the idea of sandboxing is so fundamental, I'd rather see the idea (not necessarily the current implementation) become a part of the core. -- Matthias _________________________ Racket Developers list: <a href="http://lists.racket-lang.org/dev" target="_blank">http://lists.racket-lang.org/dev</a> </blockquote></div>