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 →Read supported mailbox providers such as 126, 163, and Gmail, identify invoice attachments or invoice download links, archive invoices by month, deduplicate by invoice number and amount, and prepare monthly reports plus delivery bundles. Use when OpenClaw needs to sync invoice mail, investigate failed downloads, package a month's archive, or summarize totals and high-value invoices.