Add the ability to specify a :class: option to set CSS classes on programoutput nodes.

CHANGES.rst

@@ -9,6 +9,8 @@
 - Add an ``ansi`` extra to install ``erbsland-sphinx-ansi``. Version
   1.2.4 or later is required.
 - Explicitly list ``docutils`` as a dependency.
+- Add the ability to specify a ``:class:`` argument to set CSS classes
+  on programoutput nodes.
 
 
 0.19 (2026-02-20)

src/sphinxcontrib/programoutput/__init__.py

@@ -128,7 +128,7 @@ class ProgramOutputDirective(rst.Directive):
                        ellipsis=_slice, extraargs=unchanged,
                        returncode=nonnegative_int, cwd=unchanged,
                        caption=unchanged, name=unchanged,
-                       language=unchanged)
+                       language=unchanged, **{'class': unchanged})
 
     def run(self):
         env = self.state.document.settings.env
@@ -151,9 +151,16 @@ def run(self):
         node['language'] = self.options.get('language', 'text')
         if 'ellipsis' in self.options:
             node['strip_lines'] = self.options['ellipsis']
+
+        classes = self.options.get('class', '').split() if 'class' in self.options else []
+        if classes:
+            node['classes'] = classes
+
         if 'caption' in self.options:
             caption = self.options['caption'] or self.arguments[0]
             node = _container_wrapper(self, node, caption)
+            if classes:
+                node['classes'].extend(classes)
 
         self.add_name(node)
         return [node]
@@ -347,6 +354,8 @@ def run_programs(app, doctree):
                 output, app.config.programoutput_use_ansi, app
             )
             new_node['language'] = node['language']
+            if 'classes' in node:
+                new_node['classes'].extend(node['classes'])
             node.replace_self(new_node)
 
 

src/sphinxcontrib/programoutput/tests/test_directive.py

@@ -482,6 +482,39 @@ def test_use_ansi_enabled_extension(self):
             '\x1b[31mspam\x1b[0m'
         )
 
+    @with_content("""\
+    .. program-output:: echo spam
+       :class: myclass""")
+    def test_class(self):
+        literal = self.doctree.next_node(literal_block)
+        self.assertTrue(literal)
+        self.assertIn('myclass', literal.get('classes'))
+        self.assert_output(self.doctree, 'spam')
+        self.assert_cache(self.app, 'echo spam', 'spam')
+
+    @with_content("""\
+    .. program-output:: echo spam
+       :class: myclass anotherclass""")
+    def test_multiple_classes(self):
+        literal = self.doctree.next_node(literal_block)
+        self.assertTrue(literal)
+        classes = literal.get('classes')
+        self.assertIn('myclass', classes)
+        self.assertIn('anotherclass', classes)
+        self.assert_output(self.doctree, 'spam')
+        self.assert_cache(self.app, 'echo spam', 'spam')
+
+    @with_content("""\
+    .. program-output:: echo spam
+       :class: myclass
+       :caption: mycaption""")
+    def test_class_with_caption(self):
+        container_node = self.doctree.next_node(container)
+        self.assertTrue(container_node)
+        self.assertIn('myclass', container_node.get('classes'))
+        self.assert_output(self.doctree, 'spam', caption='mycaption')
+        self.assert_cache(self.app, 'echo spam', 'spam')
+
 def test_suite():
     return unittest.defaultTestLoader.loadTestsFromName(__name__)