Use sitemap plugin in the default config.

examples/single-site.coleslawrc

@@ -3,6 +3,7 @@
  :domain "http://blog.redlinernotes.com"
  :feeds ("lisp")
  :plugins ((mathjax)
+           (sitemap)
            (disqus :shortname "my-site-name")
            (analytics :tracking-code "foo"))
  :repo "/home/git/tmp/improvedmeans/"