Enhance arXiv digest with plain-language Top3 summaries

org/cases/arxiv_digest/arxiv_daily_digest.py

@@ -105,6 +105,18 @@ def one_liner(p):
     return f"{t}（{p['primary']}）"
 
 
+def plain_summary(p):
+    s = p.get('summary', '')
+    s = re.sub(r'\s+', ' ', s).strip()
+    if not s:
+        return '这篇主要在提出一个新方法，并用实验验证它是否更好。'
+    # take first sentence-like chunk
+    chunk = re.split(r'(?<=[\.!?])\s+', s)[0]
+    if len(chunk) > 120:
+        chunk = chunk[:117] + '...'
+    return f"它在做的事：{chunk}"
+
+
 def build_digest(papers):
     # limit scoring set for speed/stability
     recent_pool = sorted(papers, key=lambda x: x['published'], reverse=True)[:40]
@@ -125,6 +137,12 @@ def to_md(hot, latest):
     lines = []
     lines.append(f"# ArXiv Daily Brief - {today}")
     lines.append('')
+    lines.append('## 🧠 今日 Top 3（普通人版概述）')
+    for i, p in enumerate(hot[:3], 1):
+        lines.append(f"{i}. **{p['title']}**")
+        lines.append(f"   - 一句话看懂: {plain_summary(p)}")
+        lines.append(f"   - 你可能会关心: {one_liner(p)}")
+    lines.append('')
     lines.append('## 🔥 今日热度 Top 5（新鲜度+关键词+HN提及+代码线索）')
     for i, p in enumerate(hot, 1):
         lines.append(f"{i}. **{p['title']}**")