diff --git a/publish/src/core/frontmatter.ts b/publish/src/core/frontmatter.ts
index d30c2d1..1dd0314 100644
--- a/publish/src/core/frontmatter.ts
+++ b/publish/src/core/frontmatter.ts
@@ -32,6 +32,7 @@ export interface Frontmatter {
   lang?: string
   authors?: Author[]
   images?: ImageEntry[]
+  a?: string[]
   [key: string]: unknown
 }
 
diff --git a/publish/tests/frontmatter_test.ts b/publish/tests/frontmatter_test.ts
index bf01b8f..e7475f3 100644
--- a/publish/tests/frontmatter_test.ts
+++ b/publish/tests/frontmatter_test.ts
@@ -25,3 +25,24 @@ Deno.test('parseFrontmatter: erhält Leerzeichen in String-Werten', () => {
   const { fm } = parseFrontmatter(md)
   assertEquals(fm.title, 'Hello World')
 })
+
+Deno.test('parseFrontmatter: liest a-tag-liste aus frontmatter', () => {
+  const md = [
+    '---',
+    'title: T',
+    'slug: s',
+    'date: 2024-01-01',
+    'a:',
+    '  - "30023:abc:other-slug"',
+    '---',
+    'body',
+  ].join('\n')
+  const { fm } = parseFrontmatter(md)
+  assertEquals(fm.a, ['30023:abc:other-slug'])
+})
+
+Deno.test('parseFrontmatter: a fehlt → undefined', () => {
+  const md = '---\ntitle: T\nslug: s\ndate: 2024-01-01\n---\nbody'
+  const { fm } = parseFrontmatter(md)
+  assertEquals(fm.a, undefined)
+})