fix: Add generic set() method to config class for CLI

The CLI config set command was failing because config.set() didn't exist.
Added a generic set() method that maps config keys to their specific setter methods.
Also added comprehensive test suite covering all configuration options.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

cognee/api/v1/config/config.py

@@ -176,3 +176,37 @@ class config:
     def set_vector_db_url(db_url: str):
         vector_db_config = get_vectordb_config()
         vector_db_config.vector_db_url = db_url
+
+    @staticmethod
+    def set(key: str, value):
+        """
+        Generic setter that maps configuration keys to their specific setter methods.
+        This enables CLI commands like 'cognee config set llm_api_key <value>'.
+        """
+        # Map configuration keys to their setter methods
+        setter_mapping = {
+            "llm_provider": "set_llm_provider",
+            "llm_model": "set_llm_model",
+            "llm_api_key": "set_llm_api_key",
+            "llm_endpoint": "set_llm_endpoint",
+            "graph_database_provider": "set_graph_database_provider",
+            "vector_db_provider": "set_vector_db_provider",
+            "vector_db_url": "set_vector_db_url",
+            "vector_db_key": "set_vector_db_key",
+            "chunk_size": "set_chunk_size",
+            "chunk_overlap": "set_chunk_overlap",
+            "chunk_strategy": "set_chunk_strategy",
+            "chunk_engine": "set_chunk_engine",
+            "classification_model": "set_classification_model",
+            "summarization_model": "set_summarization_model",
+            "graph_model": "set_graph_model",
+            "system_root_directory": "system_root_directory",
+            "data_root_directory": "data_root_directory",
+        }
+
+        if key not in setter_mapping:
+            raise InvalidConfigAttributeError(attribute=key)
+
+        method_name = setter_mapping[key]
+        method = getattr(config, method_name)
+        method(value)

cognee/tests/unit/api/v1/config/test_config_set.py

@@ -0,0 +1,193 @@
+"""
+Tests for the config.set() method to ensure CLI config commands work correctly.
+"""
+
+import pytest
+from unittest.mock import patch, MagicMock
+from cognee.api.v1.config.config import config
+from cognee.api.v1.exceptions.exceptions import InvalidConfigAttributeError
+
+
+class TestConfigSet:
+    """Test the config.set() method for various configuration keys."""
+
+    def test_set_llm_api_key(self):
+        """Test setting LLM API key"""
+        test_key = "sk-test-key-123"
+
+        with patch("cognee.api.v1.config.config.get_llm_config") as mock_get_llm_config:
+            mock_llm_config = MagicMock()
+            mock_get_llm_config.return_value = mock_llm_config
+
+            config.set("llm_api_key", test_key)
+
+            assert mock_llm_config.llm_api_key == test_key
+
+    def test_set_llm_provider(self):
+        """Test setting LLM provider"""
+        test_provider = "anthropic"
+
+        with patch("cognee.api.v1.config.config.get_llm_config") as mock_get_llm_config:
+            mock_llm_config = MagicMock()
+            mock_get_llm_config.return_value = mock_llm_config
+
+            config.set("llm_provider", test_provider)
+
+            assert mock_llm_config.llm_provider == test_provider
+
+    def test_set_llm_model(self):
+        """Test setting LLM model"""
+        test_model = "gpt-4o"
+
+        with patch("cognee.api.v1.config.config.get_llm_config") as mock_get_llm_config:
+            mock_llm_config = MagicMock()
+            mock_get_llm_config.return_value = mock_llm_config
+
+            config.set("llm_model", test_model)
+
+            assert mock_llm_config.llm_model == test_model
+
+    def test_set_llm_endpoint(self):
+        """Test setting LLM endpoint"""
+        test_endpoint = "https://api.example.com"
+
+        with patch("cognee.api.v1.config.config.get_llm_config") as mock_get_llm_config:
+            mock_llm_config = MagicMock()
+            mock_get_llm_config.return_value = mock_llm_config
+
+            config.set("llm_endpoint", test_endpoint)
+
+            assert mock_llm_config.llm_endpoint == test_endpoint
+
+    def test_set_graph_database_provider(self):
+        """Test setting graph database provider"""
+        test_provider = "neo4j"
+
+        with patch("cognee.api.v1.config.config.get_graph_config") as mock_get_graph_config:
+            mock_graph_config = MagicMock()
+            mock_get_graph_config.return_value = mock_graph_config
+
+            config.set("graph_database_provider", test_provider)
+
+            assert mock_graph_config.graph_database_provider == test_provider
+
+    def test_set_vector_db_provider(self):
+        """Test setting vector database provider"""
+        test_provider = "chromadb"
+
+        with patch("cognee.api.v1.config.config.get_vectordb_config") as mock_get_vectordb_config:
+            mock_vector_config = MagicMock()
+            mock_get_vectordb_config.return_value = mock_vector_config
+
+            config.set("vector_db_provider", test_provider)
+
+            assert mock_vector_config.vector_db_provider == test_provider
+
+    def test_set_vector_db_url(self):
+        """Test setting vector database URL"""
+        test_url = "http://localhost:8000"
+
+        with patch("cognee.api.v1.config.config.get_vectordb_config") as mock_get_vectordb_config:
+            mock_vector_config = MagicMock()
+            mock_get_vectordb_config.return_value = mock_vector_config
+
+            config.set("vector_db_url", test_url)
+
+            assert mock_vector_config.vector_db_url == test_url
+
+    def test_set_vector_db_key(self):
+        """Test setting vector database key"""
+        test_key = "test-key-123"
+
+        with patch("cognee.api.v1.config.config.get_vectordb_config") as mock_get_vectordb_config:
+            mock_vector_config = MagicMock()
+            mock_get_vectordb_config.return_value = mock_vector_config
+
+            config.set("vector_db_key", test_key)
+
+            assert mock_vector_config.vector_db_key == test_key
+
+    def test_set_chunk_size(self):
+        """Test setting chunk size"""
+        test_size = 2000
+
+        with patch("cognee.api.v1.config.config.get_chunk_config") as mock_get_chunk_config:
+            mock_chunk_config = MagicMock()
+            mock_get_chunk_config.return_value = mock_chunk_config
+
+            config.set("chunk_size", test_size)
+
+            assert mock_chunk_config.chunk_size == test_size
+
+    def test_set_chunk_overlap(self):
+        """Test setting chunk overlap"""
+        test_overlap = 20
+
+        with patch("cognee.api.v1.config.config.get_chunk_config") as mock_get_chunk_config:
+            mock_chunk_config = MagicMock()
+            mock_get_chunk_config.return_value = mock_chunk_config
+
+            config.set("chunk_overlap", test_overlap)
+
+            assert mock_chunk_config.chunk_overlap == test_overlap
+
+    def test_set_invalid_key(self):
+        """Test that setting an invalid key raises InvalidConfigAttributeError"""
+        with pytest.raises(InvalidConfigAttributeError):
+            config.set("invalid_key", "some_value")
+
+    def test_set_multiple_keys(self):
+        """Test setting multiple configuration keys in sequence"""
+        with patch("cognee.api.v1.config.config.get_llm_config") as mock_get_llm_config:
+            mock_llm_config = MagicMock()
+            mock_get_llm_config.return_value = mock_llm_config
+
+            # Set multiple keys
+            config.set("llm_api_key", "test-key")
+            config.set("llm_provider", "openai")
+            config.set("llm_model", "gpt-4o")
+
+            # Verify all were set
+            assert mock_llm_config.llm_api_key == "test-key"
+            assert mock_llm_config.llm_provider == "openai"
+            assert mock_llm_config.llm_model == "gpt-4o"
+
+    def test_set_system_root_directory(self):
+        """Test setting system root directory"""
+        test_dir = "/tmp/test"
+
+        with patch("cognee.api.v1.config.config.get_base_config") as mock_get_base_config, \
+             patch("cognee.api.v1.config.config.get_relational_config") as mock_get_relational_config, \
+             patch("cognee.api.v1.config.config.get_graph_config") as mock_get_graph_config, \
+             patch("cognee.api.v1.config.config.get_vectordb_config") as mock_get_vectordb_config:
+
+            mock_base_config = MagicMock()
+            mock_base_config.system_root_directory = ""
+            mock_get_base_config.return_value = mock_base_config
+
+            mock_relational_config = MagicMock()
+            mock_get_relational_config.return_value = mock_relational_config
+
+            mock_graph_config = MagicMock()
+            mock_graph_config.graph_filename = "cognee.db"
+            mock_get_graph_config.return_value = mock_graph_config
+
+            mock_vector_config = MagicMock()
+            mock_vector_config.vector_db_provider = "lancedb"
+            mock_get_vectordb_config.return_value = mock_vector_config
+
+            config.set("system_root_directory", test_dir)
+
+            assert mock_base_config.system_root_directory == test_dir
+
+    def test_set_data_root_directory(self):
+        """Test setting data root directory"""
+        test_dir = "/tmp/data"
+
+        with patch("cognee.api.v1.config.config.get_base_config") as mock_get_base_config:
+            mock_base_config = MagicMock()
+            mock_get_base_config.return_value = mock_base_config
+
+            config.set("data_root_directory", test_dir)
+
+            assert mock_base_config.data_root_directory == test_dir