feat(server): enhance frontmatter parsing for skill descriptions

- Integrated a new utility function `parseFrontmatterScalarKey` to streamline the extraction of the description from skill files.
- Improved the logic for handling frontmatter, ensuring more robust parsing and trimming of description values.

lib/frontmatter-scalar.js

@@ -0,0 +1,77 @@
+/**
+ * 从 frontmatter 文本里读一个顶层标量（整块 metadata 已由调用方从 --- … --- 切好）。
+ * 多行块（description: > / |）：从下一行起收到「下一个顶层键」或 metadata 结束为止。
+ */
+
+function escapeRegExp(s) {
+  return s.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
+}
+
+/** 下一行若是顶层键 `foo:`（行首无缩进），则当前块结束。 */
+function isTopLevelKeyLine(line) {
+  const t = line.trimStart()
+  if (!t || t.startsWith('#')) return false
+  return /^[A-Za-z_][\w-]*\s*:\s/.test(t)
+}
+
+function minIndentOfNonEmpty(lines) {
+  let min = Infinity
+  for (const l of lines) {
+    if (!l.trim()) continue
+    const n = l.match(/^(\s*)/)[1].length
+    if (n < min) min = n
+  }
+  return min === Infinity ? 0 : min
+}
+
+function dedent(lines) {
+  const min = minIndentOfNonEmpty(lines)
+  return lines.map((l) => (l.length === 0 ? '' : l.slice(min)))
+}
+
+function parseFrontmatterScalarKey(fmBlock, key) {
+  if (!fmBlock || !key) return null
+  const lines = fmBlock.split(/\r?\n/)
+  const keyRe = new RegExp(`^${escapeRegExp(key)}:\\s*(.*)$`)
+
+  for (let i = 0; i < lines.length; i++) {
+    const m = lines[i].match(keyRe)
+    if (!m) continue
+
+    let after = m[1].replace(/\s+$/, '')
+    const blockHead = after.match(/^([>|])([-+]?)\s*(.*)$/)
+
+    if (blockHead) {
+      const mode = blockHead[1]
+      const sameLine = (blockHead[3] || '').trimEnd()
+      const raw = []
+      if (sameLine) raw.push(sameLine)
+
+      for (let j = i + 1; j < lines.length; j++) {
+        const line = lines[j]
+        if (line.length > 0 && !/^\s/.test(line) && isTopLevelKeyLine(line)) break
+        raw.push(line)
+      }
+
+      const body = dedent(raw)
+      if (mode === '>') {
+        return body
+          .map((l) => l.trim())
+          .filter(Boolean)
+          .join(' ')
+          .trim()
+      }
+      return body.join('\n').trim()
+    }
+
+    const t = after.trim()
+    if ((t.startsWith('"') && t.endsWith('"')) || (t.startsWith("'") && t.endsWith("'"))) {
+      return t.slice(1, -1)
+    }
+    if (t) return t.replace(/^["']|["']$/g, '')
+    return ''
+  }
+  return null
+}
+
+module.exports = { parseFrontmatterScalarKey }

server.js

@@ -3,6 +3,7 @@ const express = require('express')
 const cors = require('cors')
 const path = require('path')
 const { MongoClient, ObjectId } = require('mongodb')
+const { parseFrontmatterScalarKey } = require('./lib/frontmatter-scalar')
 const { createAuthRoutes } = require('./routes/auth')
 
 const app = express()
@@ -200,9 +201,9 @@ function extractDescription(files) {
   const content = skillFile.content
   const fmMatch = content.match(/^---\s*\r?\n([\s\S]*?)\r?\n---/)
   if (fmMatch) {
-    const descMatch = fmMatch[1].match(/^description:\s*(.+)$/m)
+    const fromFm = parseFrontmatterScalarKey(fmMatch[1], 'description')
-    if (descMatch) {
+    if (fromFm != null && String(fromFm).trim() !== '') {
-      return descMatch[1].trim().replace(/^["']|["']$/g, '')
+      return String(fromFm).trim()
     }
   }