I started out thinking that a little IRC bot that was a limited
80s-style BASIC interpreter would be fun: 10 print "hello
world" and so on. You'd have to implement limits on CPU time
(say, kill the program after a second), amount of output (limit it to a
line of output) and memory space (don't allocate more than 1K of
memory). People would probably want to be able to save their programs
and load them again later. But it then occurred to me that this would
actually be useful if you could program it to do IRC things: for
instance, if you gave it a msg command that sent a private
message to the original user and a sleep command that
caused it to sleep until a given time, then you could use it to
implement various sorts of flexible reminder bot. You could even make it
bind commands to programs, so basic, remind +90m washing
would run the "remind" programs with the other arguments in an array.
Ideally, you'd be able to run multiple programs at once so that several
people could have reminder-like things going.