◇ Could this help me?
Yes for the categories, no for installing from the list. The eight entries map out genuinely useful gaps that skills can fill, and the more valuable ones point at real, well-established projects, particularly the code-driven video rendering framework and the design-linting idea of flagging violations with an exact file and line rather than vague feedback. The reason to treat the list itself carefully is that every entry is a one-line marketing claim, the links are gated behind commenting rather than published, and the descriptions oversell in the usual ways, with fully autonomous doing a lot of work in the seventh entry. Research each one on its own merits before anything is installed. General practice, and the most transferable item is the last one: design feedback tied to specific file and line numbers is far more actionable than a general critique.
I have a list of eight third-party skills I am considering, covering engineering orchestration, code-driven video rendering, interface design quality, giving the assistant browser access, persisting my stack and standards across sessions, frontend design, autonomous feature delivery with tests and a pull request, and design guideline linting. Do not install anything. For each one, research the actual project behind it: who publishes it, how actively it is maintained, what it genuinely does versus what its description claims, what access or permissions it requires, and whether the capability could be achieved with instructions rather than installed code. Rank them by value to me against the work I describe below, and tell me which ones I should skip entirely.