This is not finished or perfect but here is a plug-in heavily based on Shawn Tracy’s loneliness plug-in.
It’s a cut down version of one that I edited for my own Hal brain, I’m not really a scripter more of a creative thinker [

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This is what it does:
Instead of getting lonely Hal will pull out information from the brain, bits from here and there, sometimes piece some together and say them out loud. There are some others things he says, tells the time, asks if you are there and a few more.
Hal will not get angered if you don’t speak he will just eventually go to sleep or rest and tell you that.
To stop Hal saying things just say brb or be right back.
You need to say at least one thing to hal to start the plug-in going then wait at least a minute for hal to say something.
A word of warning, this plug-in can’t be run with the loneliness plug-in, only one or the other should be ticked in Hals plugins.
Some of you might want to give it a try or improve it.
It is working fine for me in 6.2.
Download:
http://www.global.datahopa.co.uk/hal/downloads/Idle-Chat.zip