feat: make agent runner config schema driven

tests/unit_tests/agent/test_config_migration.py

@@ -132,7 +132,7 @@ class TestResolveRunnerConfig:
         assert config == {'model': 'uuid-123', 'max_round': 10}
 
     def test_resolve_old_format_config(self):
-        """Resolve runner config from old format."""
+        """Runtime config resolver should not read old format."""
         pipeline_config = {
             'ai': {
                 'local-agent': {
@@ -146,6 +146,23 @@ class TestResolveRunnerConfig:
             pipeline_config,
             'plugin:langbot/local-agent/default',
         )
+        assert config == {}
+
+    def test_resolve_legacy_config_for_migration(self):
+        """Migration helper should read old format."""
+        pipeline_config = {
+            'ai': {
+                'local-agent': {
+                    'model': 'uuid-123',
+                    'max_round': 10,
+                },
+            },
+        }
+
+        config = ConfigMigration.resolve_legacy_runner_config(
+            pipeline_config,
+            'plugin:langbot/local-agent/default',
+        )
         assert config == {'model': 'uuid-123', 'max_round': 10}
 
     def test_resolve_no_config(self):
@@ -228,4 +245,4 @@ class TestGetOldRunnerName:
     def test_get_old_runner_name_not_mapped(self):
         """Get old runner name for unmapped runner ID."""
         old_name = ConfigMigration.get_old_runner_name('plugin:alice/my-agent/custom')
-        assert old_name is None
+        assert old_name is None