David asks: Challenged whether tool and thread belong in the public kind taxonomy

After seeing entry kinds in the redesigned profile, David pushed back on the taxonomy:

but why does a tool kind or an artifact kind make sense? actually i think artifacts makes sense but thats if the user is sharing a file or some publication or something (which we should support? have you built UIs for videos, pdfs, word docs, pptx, markdown files, latex files etc to be displayed within granular, not as a clickable thing that downloads but actually displaying it inside the entry?) but what is a tool kind entry? and what is a thread kind entry??

This prompted a clarification: tool and thread are internal routing kinds aliased to decision and insight at the public render layer. David simultaneously opened the artifact file-display question — whether PDFs, Word docs, PPTX, and video should render inline inside the entry rather than as download links.