[plt-scheme] PLaneT development links

What's the easiest/best way to set the PLaneT development links to an 
exact list?

Can I just generate file "~/.plt-scheme/planet/300/HARD-LINKS"?

Background follows...

I'm changing PLaneT development links heavily, which can be a hassle and 
error-prone when dealing with lots of small packages, so Im thinking of 
automating the process.

Currently, I use a Makefile target, to which I add "planet link" 
commands to add a development link, and then change them into "planet 
unlink" commands when I wish to remove the development link.  This is 
obviously programmatically inefficient .  (The human hassle is a 
separate matter, which I can automate.)

planet-dev-links:
        planet unlink me foo.plt 1 1
        planet link me bar.plt 1 1 ~/scheme/bar
        planet link me baz.plt 1 2 ~/scheme/baz

Thanks,
Neil