Claude skills for Product

4 skills in the bank are filed under Product. They are grouped here because they compete for the same jobs — which is the reason an agent reaching for one of them sometimes gets another.

• Office HoursgstackPressure-tests a raw product idea the way a sharp investor would — probing who it is for, why now, and what would make it fail — before any planning or building begins. Unlike turning an idea into a spec or grading a written plan, this is the earliest step: deciding whether the idea is worth pursuing at all.
• Plan CEO ReviewgstackReviews an already-written plan from a founder's chair — is the scope right, are the priorities ordered well, is this the most valuable thing to build now. It judges a finished plan on business and product grounds, where an engineering review would judge that same plan on architecture, and idea pressure-testing would question the concept before any plan exists.
• RetrogstackRuns a look-back over a stretch of finished work — what shipped, what went sideways, what to change next time — turning recent experience into concrete process improvements. It faces backward at completed work, where idea pressure-testing, spec-writing and plan reviews all face forward at work not yet done.
• SpecgstackTurns a vague intent into a precise, buildable specification, working through the ambiguities in stages until the requirements are concrete enough to implement against. It assumes you have decided WHAT you want and need it made executable — not whether the idea is worth doing, and not a critique of a plan you already drafted.