SkillOpt treats markdown skill files as trainable parameters with proper optimization machinery

SkillOpt uses a frontier model to propose add, delete, and replace edits to markdown skill files, then accepts only strict gains on a held-out validation set; the best skills usually converge after 1 to 4 accepted edits.

Why it matters: HKR-H/K/R all pass: the hook is trainable markdown skills, with held-out validation and 1-4 accepted edits. Single Reddit/project source and no broad adoption data keep it at 78, featured not p1.