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+Extending BE
+============
+
+To write a plugin, you simply create a new file in the becommands
+directory.  Take a look at one of the simpler plugins (e.g. open.py)
+for an example of how that looks, and to start getting a feel for the
+libbe interface.
+
+To fit into the current framework, your extension module should
+provide the following elements:
+  __desc__
+    A short string describing the purpose of your plugin
+  execute(args)
+    The entry function for your plugin.  args is everything from
+    sys.argv after the name of your plugin (e.g. for the command
+    `be open abc', args=['abc']).
+  help()
+     Return the string to be output by `be help <yourplugin>',
+     `be <yourplugin> --help', etc.
+
+While that's all that's strictly necessary, many plugins (all the
+current ones) use libbe.cmdutil.CmdOptionParser to provide a
+consistent interface
+  get_parser()
+    Return an instance of CmdOptionParser("<usage string>").  You can
+    alter the parser (e.g. add some more options) before returning it.
+
+Again, you can just browse around in becommands to get a feel for things.