> but was a contributor to it. He, with a team, unquestionably wrote it.
contribute < wrote.
His credits are huge, but I think saying he wrote Unix is misattribution.
Credits include: Plan 9 (successor to Unix), Unix Window System, UTF-8 (maybe his most universally impactful contribution), Unix Philosophy Articulation, strings/greps/other tools, regular expressions, C successor work that ultimately let him to Go.
Are you under the impression he was, like, a hands-off project manager or something? His involvement was in writing it. Not singlehandedly, but certainly as part of a team. He unquestionably wrote it. He did not envision it like he did the other projects you mention, but the original credit was only in the writing of.
To say "Rob Pike wrote Unix" is completely inaccurate. He joined after v7, in 1980.
Nobody seems to be questioning that he was involved in Unix. Given that he didn't write it, what did he do for the project? Quality assurance? Support? Marketing? Court jester?