Implemented the next missing parity slice around agent configurations.

tests/test_agent_slash_commands.py

@@ -4,6 +4,7 @@ import tempfile
 import unittest
 import json
 import sys
+import os
 from pathlib import Path
 from unittest.mock import patch
 
@@ -119,6 +120,35 @@ class AgentSlashCommandTests(unittest.TestCase):
         self.assertIn('Hard input limit', result.final_output)
         self.assertIn('Auto-compact buffer', result.final_output)
 
+    def test_agents_command_lists_and_shows_custom_agents(self) -> None:
+        with tempfile.TemporaryDirectory() as home_dir, tempfile.TemporaryDirectory() as tmp_dir:
+            workspace = Path(tmp_dir)
+            agents_dir = workspace / '.claude' / 'agents'
+            agents_dir.mkdir(parents=True)
+            (agents_dir / 'reviewer.md').write_text(
+                (
+                    '---\n'
+                    'name: reviewer\n'
+                    'description: "Review implementation changes carefully."\n'
+                    'tools: read_file, grep_search\n'
+                    'model: test-child-model\n'
+                    '---\n\n'
+                    'Inspect code changes and summarize risks.\n'
+                ),
+                encoding='utf-8',
+            )
+            with patch.dict(os.environ, {'HOME': home_dir}):
+                agent = LocalCodingAgent(
+                    model_config=ModelConfig(model='test-model'),
+                    runtime_config=AgentRuntimeConfig(cwd=workspace),
+                )
+                list_result = agent.run('/agents')
+                detail_result = agent.run('/agents show reviewer')
+        self.assertIn('# Agents', list_result.final_output)
+        self.assertIn('reviewer [projectSettings]', list_result.final_output)
+        self.assertIn('# Agent: reviewer', detail_result.final_output)
+        self.assertIn('Inspect code changes and summarize risks.', detail_result.final_output)
+
     def test_mcp_and_resource_commands_render_local_reports(self) -> None:
         with tempfile.TemporaryDirectory() as tmp_dir:
             workspace = Path(tmp_dir)