Skills（SKILL.md）は、AIエージェント（Claude Code、Cursor、Codexなど）に特定の能力を追加するための設定ファイルです。
詳しく見る →Comprehensive Gumroad merchant management for Products, Sales, Licenses, Discounts, Payouts, and Webhooks. Use when Claude needs to: (1) Manage digital or physical inventory, (2) Oversee transactions and process refunds/shipping, (3) Verify or rotate license keys, (4) Manage offer codes, or (5) Monitor payout history and store webhooks.