biomejs · dyc3 · Nov 8, 2025 · Nov 8, 2025 · Nov 8, 2025
diff --git a/.changeset/flat-rockets-battle.md b/.changeset/flat-rockets-battle.md
@@ -0,0 +1,5 @@
+---
+"@biomejs/biome": patch
+---
+
+Biome now keeps a blank line after the frontmatter section in Astro files.
diff --git a/crates/biome_cli/tests/cases/handle_astro_files.rs b/crates/biome_cli/tests/cases/handle_astro_files.rs
@@ -223,6 +223,9 @@ let schema = z.object().optional();
 schema + sure()
 ---
 
+
+
+
 <html><head><title>Astro</title></head><body></body></html>
 
 <style>

diff --git a/crates/biome_cli/tests/snapshots/main_cases_handle_astro_files/dont_indent_frontmatter.snap b/crates/biome_cli/tests/snapshots/main_cases_handle_astro_files/dont_indent_frontmatter.snap
@@ -24,6 +24,7 @@ if (bar > 1) {
 	console.log(bar + 1);
 }
 ---
+
 <Foo>{bar}</Foo>
 
 <style>

diff --git a/...ests/snapshots/main_cases_handle_astro_files/format_astro_with_typescript_script_tag.snap b/...ests/snapshots/main_cases_handle_astro_files/format_astro_with_typescript_script_tag.snap
@@ -20,6 +20,7 @@ expression: redactor(content)
 ---
 const title = "My Page";
 ---
+
 <html>
 	<body>
 		<script>

diff --git a/crates/biome_cli/tests/snapshots/main_cases_handle_astro_files/full_support.snap b/crates/biome_cli/tests/snapshots/main_cases_handle_astro_files/full_support.snap
@@ -24,6 +24,7 @@ import z from "zod";
 const schema = z.object().optional();
 schema + sure();
 ---
+
 <html>
 	<head>
 		<title>Astro</title>
@@ -56,15 +57,15 @@ check ━━━━━━━━━━━━━━━━━━━━━━━━
 # Emitted Messages
 
 ```block
-file.astro:13:20 lint/a11y/useGenericFontNames ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+file.astro:16:20 lint/a11y/useGenericFontNames ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
   × Generic font family missing.
 
-    12 │ <style>
-  > 13 │ #id { font-family: comic-sans } .class { background: red}
+    15 │ <style>
+  > 16 │ #id { font-family: comic-sans } .class { background: red}
        │                    ^^^^^^^^^^
-    14 │ </style>
-    15 │ 
+    17 │ </style>
+    18 │ 
 
   i Consider adding a generic font family as a fallback.
 

diff --git a/crates/biome_html_formatter/src/html/auxiliary/root.rs b/crates/biome_html_formatter/src/html/auxiliary/root.rs
@@ -18,7 +18,7 @@ impl FormatNodeRule<HtmlRoot> for FormatHtmlRoot {
         }
 
         if let Some(frontmatter) = frontmatter {
-            write!(f, [frontmatter.format(), hard_line_break()])?;
+            write!(f, [frontmatter.format(), empty_line()])?;
         }
 
         if let Some(directive) = directive {

diff --git a/...me_html_formatter/tests/specs/html/component-frameworks/astro-component-casing.astro.snap b/...me_html_formatter/tests/specs/html/component-frameworks/astro-component-casing.astro.snap
@@ -41,6 +41,7 @@ Self close void elements: never
 import Button from './Button.astro';
 import TextInput from './TextInput.astro';
 ---
+
 <Button label="test button"/>
 <TextInput placeholder="enter text"/>
 <button>native button</button>

diff --git a/crates/biome_html_formatter/tests/specs/html/frontmatter.html.snap b/crates/biome_html_formatter/tests/specs/html/frontmatter.html.snap
@@ -36,5 +36,6 @@ Self close void elements: never
 ---
 layout: foo
 ---
+
 Test <a href="https://prettier.io">abc</a>.
 ```
diff --git a/crates/biome_html_formatter/tests/specs/prettier/html/front-matter/custom-parser.html.snap b/crates/biome_html_formatter/tests/specs/prettier/html/front-matter/custom-parser.html.snap
diff --git a/crates/biome_html_formatter/tests/specs/prettier/html/front-matter/empty.html.snap b/crates/biome_html_formatter/tests/specs/prettier/html/front-matter/empty.html.snap
diff --git a/crates/biome_html_formatter/tests/specs/prettier/html/front-matter/empty2.html.snap b/crates/biome_html_formatter/tests/specs/prettier/html/front-matter/empty2.html.snap
diff --git a/..._html_formatter/tests/specs/prettier/html/front-matter/issue-9042-no-empty-line.html.snap b/..._html_formatter/tests/specs/prettier/html/front-matter/issue-9042-no-empty-line.html.snap
diff --git a/crates/biome_html_formatter/tests/specs/prettier/html/front-matter/issue-9042.html.snap b/crates/biome_html_formatter/tests/specs/prettier/html/front-matter/issue-9042.html.snap
-Original file line number
+Diff line change
@@ Expand Up / @@ -223,6 +223,9 @@ let schema = z.object().optional(); @@
     schema + sure()
     ---
     <html><head><title>Astro</title></head><body></body></html>
     <style>
@@ Expand Down @@