Ask HN: Recommend Cofounder Split IP Agreement Template?

Ask HN: Recommend Cofounder Split IP Agreement Template? A friend and I came close to doing a startup together, but when it came time to drop out, my friend chickened out. I am looking for a template for an IP assignment agreement for people splitting up. Since we never formed a company, and never assigned IP to an entity I am fine with clearly dividing the IP, signing a mutual NDA about each others respective IP, and going merrily on the way. I found IP assignment agreements for founders forming a company, but did not see agreements for people who had never formed a legal entity, and were wishing to carve up IP between individuals before parting. Would a simple agreement for the leaving friend to the effect of below be sufficient? I agree we worked on X, Y, and Z together from __ to __. A complete list of things I own is: K algorithm J library code L graphics All other IP belongs to $STAYING_DUDE. I agree I have zero ownership in $COMPANY_STAYING_DUDE_JUST_REGISTERED. I agree that IP belonging to $STAYING_DUDE that was communicated to expressly or implied, was done so in confidence, and is a trade secret.