oa-literature-harvester

Use when the user wants Codex to search, download, audit, or resume a corpus of open-access academic literature by topic, field, keywords, year range, or target size. Trigger this skill for requests such as “帮我搜这个领域的 OA 文献”, “按关键词下载 PDF”, “从 2000 到现在持续采集”, “帮我统计真实 PDF 数量”, “帮我定向找 NCS 和领域顶刊文献”, or when Codex should operate the local `oa-literature-downloader` project and return corpus-quality metrics.