Skills From Expertise · polarsnowflake bundle What goes inside a skill rather than how to format it: how to turn expertise into a methodology, not a list of tips. Load when a skill carrying subject knowledge is being created or rewritten, whether from a video, book, article, course, interview, spreadsheet, diagram, regulation, code, or your own experience; when deciding what belongs inside a skill and by what criterion; when sources contradict each other; when a rule looks obvious; when naming a skill, drawing a boundary between skills, or organising a set; when a skill is written but unusable, the knowledge there and the decisions missing; when there is little material and it is unclear whether it is enough; when the result should be project instructions or a reference rather than a skill; before publishing a skill built from someone else's material. Legal framing lives here too: what may be taken, when to quote, which license to apply, what to do with personal data and sources under NDA. Not about format, which the Agent Skills specification covers.