multi-source-paper-search

Search academic papers across multiple sources at once (OpenAlex, Semantic Scholar, arXiv/Valyu, Perplexity) from a single request, then cross-validate and cross-align the results into one cited synthesis report. Use this whenever the user wants to find papers / literature / prior work / studies on a topic and would benefit from MORE THAN ONE source — i.e. they want it comprehensive, corroborated, triangulated, or cross-checked, or they say things like "多源搜论文", "交叉搜论文", "跨源检索", "find papers on X across sources", "what does the literature say about X", "search arxiv and openalex for X", or ask which findings are agreed-upon vs contested. Strongly prefer this over any single source skill (openalex-paper-search / arxiv-search / perplexity-search / research-lookup) when the goal is a literature scan rather than fetching one specific known paper. The dedup/consensus/coverage alignment is the whole point — don't hand-roll it with one source.