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run.py

@@ -218,10 +218,17 @@ def _mine_comparison_algorithms(arxiv_id: str, title: str, abstract: str) -> tup
 
 def _search_s2_papers(query: str, limit: int = 5) -> list[dict]:
     """在 Semantic Scholar 中搜索论文，覆盖全工科领域（IEEE/ASME/ASCE 等期刊）。
+    带 30 分钟 TTL 缓存，降低 S2 API 压力。
 
     Returns:
         list[dict]: [{"title": ..., "abstract": ..., "year": ..., "citations": ..., "url": ...}, ...]
     """
+    from cache import s2_cache
+    cache_key = f"s2_search:{query}:{limit}"
+    cached = s2_cache.get(cache_key)
+    if cached is not None:
+        return cached
+
     api_url = (
         f"https://api.semanticscholar.org/graph/v1/paper/search"
         f"?query={urllib.request.quote(query)}&limit={limit}"
@@ -248,6 +255,7 @@ def _search_s2_papers(query: str, limit: int = 5) -> list[dict]:
             "arxiv_id": (p.get("externalIds") or {}).get("ArXiv", ""),
             "doi": (p.get("externalIds") or {}).get("DOI", ""),
         })
+    s2_cache.set(cache_key, papers)
     return papers