Allow customizing HTML attributes for alert title

CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 This project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html),
 with the exception that 0.x versions can break between minor versions.
 
+## [Unreleased]
+### Added
+- Allow customizing HTML attributes for alert title `<p>` tag via `AttributeProvider`
+
 ## [0.28.0] - 2026-03-31
 ### Added
 - New extension for alerts (aka callouts/admonitions)
@@ -533,6 +537,7 @@ API breaking changes (caused by changes in spec):
 Initial release of commonmark-java, a port of commonmark.js with extensions
 for autolinking URLs, GitHub flavored strikethrough and tables.
 
+[Unreleased]: https://github.com/commonmark/commonmark-java/compare/commonmark-parent-0.28.0...main
 [0.28.0]: https://github.com/commonmark/commonmark-java/compare/commonmark-parent-0.27.1...commonmark-parent-0.28.0
 [0.27.1]: https://github.com/commonmark/commonmark-java/compare/commonmark-parent-0.27.0...commonmark-parent-0.27.1
 [0.27.0]: https://github.com/commonmark/commonmark-java/compare/commonmark-parent-0.26.0...commonmark-parent-0.27.0

commonmark-ext-gfm-alerts/src/main/java/org/commonmark/ext/gfm/alerts/internal/AlertHtmlNodeRenderer.java

@@ -34,7 +34,7 @@ protected void renderAlert(Alert alert) {
         htmlWriter.line();
 
         // Render alert title
-        htmlWriter.tag("p", Map.of("class", "markdown-alert-title"));
+        htmlWriter.tag("p", context.extendAttributes(alert, "p", Map.of("class", "markdown-alert-title")));
         htmlWriter.text(getAlertTitle(type));
         htmlWriter.tag("/p");
         htmlWriter.line();