Add Dana agent provider stub

- Add inline::dana agent provider implementation (stub)
- Register provider in agents registry with proper dependencies
- Add Dana provider to starter distribution (build.yaml, run.yaml, starter.py)
- Add unit tests for provider registration and config validation
- Implementation follows meta-reference pattern with NotImplementedError stubs

tests/unit/providers/inline/agents/dana/__init__.py

@@ -0,0 +1,6 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+

tests/unit/providers/inline/agents/dana/test_dana.py

@@ -0,0 +1,46 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+"""
+Test suite for the Dana agent provider implementation (stub).
+
+TODO: Add tests when implementation is complete.
+"""
+
+from llama_stack.core.datatypes import Api
+from llama_stack.core.distribution import get_provider_registry
+from llama_stack.providers.inline.agents.dana.agents import DanaAgentsImpl
+from llama_stack.providers.inline.agents.dana.config import DanaAgentsImplConfig
+
+
+def test_dana_provider_in_registry():
+    """Test that the Dana provider is registered and can be found in the registry."""
+    provider_registry = get_provider_registry()
+    agents_providers = provider_registry.get(Api.agents, {})
+
+    # Verify the provider is in the registry
+    assert "inline::dana" in agents_providers, "Dana provider should be registered"
+
+    provider_spec = agents_providers["inline::dana"]
+    assert provider_spec.provider_type == "inline::dana"
+    assert provider_spec.api == Api.agents
+    assert provider_spec.module == "llama_stack.providers.inline.agents.dana"
+    assert provider_spec.config_class == "llama_stack.providers.inline.agents.dana.DanaAgentsImplConfig"
+
+
+def test_dana_provider_config():
+    """Test that the Dana provider config can be instantiated."""
+    config = DanaAgentsImplConfig.sample_run_config(__distro_dir__="test")
+    assert isinstance(config, dict)
+    assert "persistence" in config
+    assert "agent_state" in config["persistence"]
+    assert "responses" in config["persistence"]
+
+
+def test_dana_provider_class_exists():
+    """Test that Dana provider class exists."""
+    assert DanaAgentsImpl is not None
+    # TODO: Add actual tests when the provider is implemented