The Other Ninety
Your agent writes the code. o90 does everything else.
The first 90 percent of the code accounts for the first 90 percent of the development time. The remaining 10 percent of the code accounts for the other 90 percent of the development time.
The name comes from the quote. The work o90 covers is everything around the code: planning, delegating, reviewing, verifying, and keeping all of it consistent from one session to the next.
It ships as a Claude Code plugin and a Pi configuration, with rules that decide when to ask, how to route work, and how hard to verify before calling something done.
/plugin marketplace add vrennat/other-ninety
/plugin install other-ninety@other-ninety