ContextualWisdomLab · seonghobae · Jul 15, 2026 · Jul 15, 2026 · Jul 15, 2026 · Jul 15, 2026
diff --git a/.jules/palette.md b/.jules/palette.md
@@ -48,3 +48,6 @@
 ## 2024-08-01 - 네이티브 브라우저 UI의 다크 모드 지원 강제
 **학습:** CSS 미디어 쿼리(`@media (prefers-color-scheme: dark)`)를 통해 다크 모드를 지원하더라도, 브라우저의 네이티브 UI 요소(스크롤바, 기본 폼 컨트롤, 기본 백그라운드 등)는 테마 변경을 인식하지 못해 어두운 테마 환경에서 밝은 스크롤바가 표시되는 등 시각적 불일치를 초래합니다.
 **조치:** 항상 HTML 문서의 `<head>` 영역에 `<meta name="color-scheme" content="light dark">` 메타 태그를 명시적으로 추가하여 브라우저 수준에서 사용자의 시스템 테마(다크 모드 등)를 완전히 상속받아 일관성 있는 네이티브 UI를 렌더링하도록 보장하십시오.
+## 2026-07-15 - Provide fallback for empty directory names
+**Learning:** In Java/Kotlin, root directories return an empty string for `getName()`. This results in empty `<title>` and `<h1>` tags, which harms accessibility. Fallbacks (e.g. `absolutePath`) must be provided for UI elements.
+**Action:** Use `name.ifEmpty { absolutePath }` when generating HTML content from File objects to ensure semantic tags are properly populated.
diff --git a/src/main/kotlin/html4tree/main.kt b/src/main/kotlin/html4tree/main.kt
@@ -327,12 +327,12 @@ ${cssContent}              </style>
         <meta http-equiv="Content-Security-Policy" content="default-src 'none'; style-src '${styleHash}'; base-uri 'none'; form-action 'none';">
         <!-- 보안 향상: 리퍼러를 통한 디렉토리 경로 노출 방지 -->
         <meta name="referrer" content="no-referrer">
-        <title>${curr_dir.getName().escapeHtml()}</title>
+        <title>${curr_dir.name.ifEmpty { curr_dir.absolutePath }.escapeHtml()}</title>
         ${css}
      </head>
      <body>
        <main>
-         <h1>${curr_dir.getName().escapeHtml()}</h1>
+         <h1>${curr_dir.name.ifEmpty { curr_dir.absolutePath }.escapeHtml()}</h1>
          <nav aria-label="디렉토리 목록">
          <ul role="list">
             <li><a class="dir-link" href="./.." aria-label="상위 디렉토리로 이동" title="상위 디렉토리로 이동"><span class="icon" aria-hidden="true">&#x21B0;</span> <span>..</span></a></li>

diff --git a/src/test/kotlin/html4tree/MainTest.kt b/src/test/kotlin/html4tree/MainTest.kt
@@ -95,6 +95,8 @@ class MainTest {
         assertTrue(htmlContent.contains("<html lang=\"ko\">"))
         assertTrue(htmlContent.contains("이 디렉토리는 비어 있습니다."))
         assertTrue(htmlContent.contains("role=\"list\""))
+        assertTrue(htmlContent.contains("<title>${tempDir.name.escapeHtml()}</title>"))
+        assertTrue(htmlContent.contains("<h1>${tempDir.name.escapeHtml()}</h1>"))
     }
 
     @Test
@@ -308,6 +310,8 @@ class MainTest {
         assertTrue(indexFile.exists())
         val htmlContent = indexFile.readText()
         assertTrue(htmlContent.contains("<html lang=\"ko\">"))
+        assertTrue(htmlContent.contains("<title>${tempDir.name.escapeHtml()}</title>"))
+        assertTrue(htmlContent.contains("<h1>${tempDir.name.escapeHtml()}</h1>"))
         assertTrue(htmlContent.contains("<meta name=\"color-scheme\" content=\"light dark\">"))
         assertTrue(htmlContent.contains("<nav aria-label=\"디렉토리 목록\">"))
         assertTrue(htmlContent.contains("role=\"list\""))
@@ -401,7 +405,11 @@ class MainTest {
 
             go(tempDir.absolutePath, -1)
 
-            assertTrue(File(tempDir, "index.html").exists())
+            val indexFile = File(tempDir, "index.html")
+            assertTrue(indexFile.exists())
+            val htmlContent = indexFile.readText()
+            assertTrue(htmlContent.contains("<title>${tempDir.name.escapeHtml()}</title>"))
+            assertTrue(htmlContent.contains("<h1>${tempDir.name.escapeHtml()}</h1>"))
 
             val subdirIndex = File(subdir, "index.html")
             assertTrue(subdirIndex.exists())
@@ -423,7 +431,12 @@ class MainTest {
 
         go(tempDir.absolutePath, 0)
 
-        assertTrue(File(tempDir, "index.html").exists())
+        val indexFile = File(tempDir, "index.html")
+        assertTrue(indexFile.exists())
+        val htmlContent = indexFile.readText()
+        assertTrue(htmlContent.contains("<title>${tempDir.name.escapeHtml()}</title>"))
+        assertTrue(htmlContent.contains("<h1>${tempDir.name.escapeHtml()}</h1>"))
+
         assertFalse(File(subdir, "index.html").exists())
         assertFalse(File(subsubdir, "index.html").exists())
     }
@@ -438,7 +451,12 @@ class MainTest {
 
         go(tempDir.absolutePath, -1)
 
-        assertTrue(File(tempDir, "index.html").exists())
+        val indexFile = File(tempDir, "index.html")
+        assertTrue(indexFile.exists())
+        val htmlContent = indexFile.readText()
+        assertTrue(htmlContent.contains("<title>${tempDir.name.escapeHtml()}</title>"))
+        assertTrue(htmlContent.contains("<h1>${tempDir.name.escapeHtml()}</h1>"))
+
         assertTrue(File(subdir, "index.html").exists())
         assertFalse(File(gitDir, "index.html").exists())
     }
@@ -466,7 +484,12 @@ class MainTest {
 
             go(tempDir.absolutePath, -1)
 
-            assertTrue(File(tempDir, "index.html").exists())
+            val indexFile = File(tempDir, "index.html")
+            assertTrue(indexFile.exists())
+            val htmlContent = indexFile.readText()
+            assertTrue(htmlContent.contains("<title>${tempDir.name.escapeHtml()}</title>"))
+            assertTrue(htmlContent.contains("<h1>${tempDir.name.escapeHtml()}</h1>"))
+
             assertTrue(File(unreadableDir, "index.html").exists())
         } finally {
             unreadableDir.setReadable(true, false)
@@ -488,7 +511,12 @@ class MainTest {
         val cli = Html4tree()
         cli.parse(arrayOf(tempDir.absolutePath))
         main(arrayOf(tempDir.absolutePath))
-        assertTrue(File(tempDir, "index.html").exists())
+
+        val indexFile = File(tempDir, "index.html")
+        assertTrue(indexFile.exists())
+        val htmlContent = indexFile.readText()
+        assertTrue(htmlContent.contains("<title>${tempDir.name.escapeHtml()}</title>"))
+        assertTrue(htmlContent.contains("<h1>${tempDir.name.escapeHtml()}</h1>"))
     }
 
     @Test(expected = IllegalArgumentException::class)
@@ -520,6 +548,21 @@ class MainTest {
         process_dir(tempDir)
     }
 
+    @Test
+    fun testProcessDirEmptyNameFallback() {
+        val fakeRoot = object : File(tempDir, "fakeRoot") {
+            override fun getName(): String = ""
+        }
+        fakeRoot.mkdir()
+        process_dir(fakeRoot)
+        val indexFile = File(fakeRoot, "index.html")
+        assertTrue(indexFile.exists())
+        val htmlContent = indexFile.readText()
+        val expectedFallback = fakeRoot.absolutePath.escapeHtml()
+        assertTrue(htmlContent.contains("<title>$expectedFallback</title>"))
+        assertTrue(htmlContent.contains("<h1>$expectedFallback</h1>"))
+    }
+
     @Test(expected = IllegalArgumentException::class)
     fun testGoBlankDir() {
         go("   ", -1)