CRO, copywriting, SEO, analytics, growth engineering. Four of the five hand you text or a plan that somebody has to judge. Analytics hands you a figure that either matches the dashboard or does not, which makes it the one an agent can get caught being wrong about.
Conversion rate optimisation. Produces a proposal for what to change, which somebody then has to test.
Produces text. There is no correct answer, only one that performs better than another when measured.
Produces recommendations against rules that change without notice. Feedback arrives weeks after the work.
Produces a number. It is right or wrong against the same source everyone else can query, and it fails fast and in public.
Produces code and experiments. Closest to the rest of this board, and the only one of the five with a build step.
Every other skill pack in today's top fourteen targets writing code or running agents. This one points the same file format at a department that has never had one.
A skill file is a text file with instructions. Nothing about that format is specific to programming, which is why it took about a week to cross into another discipline.
No skill names, no count, no client list, no results. The trending description names five disciplines and stops.
Concept mock, not affiliated with the project. The GitHub Trending description on 7 September 2026 reads "Marketing skills for Claude Code and AI agents. CRO, copywriting, SEO, analytics, and growth engineering." The five rows are those five disciplines in the order given. The check column is this page's own reading of how each discipline gets validated, not a claim from the project, and no skill file, count, or result appears here.