Writing a plugin for generating ROBOTS.TXT / sitemap.xml files

[PurpleSquirrelJohn]

I've been enjoying the plugins quite a bit lately. I've written two more websites that use them heavily. Hope plugins make it to general use in the next few months.

Anyway, I'm thinking of writing a plugin that automatically generates the ROBOTS.TXT and the sitemap.xml files from the structure of routes or any subrouters (with possible hints).

But, if I could get some opinions/feedback:

1. Should I aim to generate this information as much as possible at compile-time? Or should I go the easy route and generate it mostly at run time?

I'm not convinced compile-time generation is really even possible for the sitemap, but should I even consider such things as a goal?

2. What kind of "hinting" would be easiest to use when handling web pages URLs that are more dynamic in nature?

3. Should I make this one plugin? Or make seperate a "ROBOTS.TXT" plugin and a "sitemap.xml" plugin.

Plus any other comments or desires, please let me know. (Can't guarantee anything, but at least I would know what is wanted.)