Use kwargs to create agent_configs in AgentBuilder (#1209)

* Fix agent_configs in conf being ignored in AgentBuilder

* Use TextAnalyzerAgent in tests

* Minor refactor

Author: kumaranvpl

autogen/agentchat/contrib/captainagent/agent_builder.py

@@ -397,7 +397,7 @@ def build(
         if max_agents is None:
             max_agents = self.max_agents
 
-        agent_configs = []
+        agent_configs = kwargs.get("agent_configs", [])
         self.building_task = building_task
 
         print(colored("==> Generating agents...", "green"), flush=True)

test/agentchat/contrib/test_agent_builder.py

@@ -13,6 +13,7 @@
 import pytest
 
 from autogen.agentchat.contrib.captainagent.agent_builder import AgentBuilder
+from autogen.agentchat.contrib.text_analyzer_agent import TextAnalyzerAgent
 from autogen.import_utils import optional_import_block, skip_on_missing_imports
 
 from ...conftest import KEY_LOC, OAI_CONFIG_LIST
@@ -122,6 +123,36 @@ def test_build_from_library(builder: AgentBuilder):
     assert len(agent_config["agent_configs"]) <= builder.max_agents
 
 
+@pytest.mark.openai
+@skip_on_missing_imports(["openai"], "openai")
+def test_build_with_agent_configs(builder: AgentBuilder):
+    conf = {
+        "building_task": "Generate one TextAnalyzerAgent to analyze text",
+        "agent_configs": [
+            {
+                "name": "TextAnalyzerAgent",
+                "model": ["gpt-4o"],
+                "description": "A helpful assistant to analyze text. Ask them to analyze any text, and they will provide you with the analysis.",
+                "system_message": "",
+                "agent_path": "autogen/agentchat/contrib/text_analyzer_agent/TextAnalyzerAgent",
+            }
+        ],
+        "coding": True,
+        "default_llm_config": {"temperature": 0},
+        "code_execution_config": {"work_dir": ".", "use_docker": False, "timeout": 60, "last_n_messages": 2},
+    }
+
+    agents, _ = builder.build(**conf)
+
+    is_agent_found = False
+    for agent in agents:
+        if isinstance(agent, TextAnalyzerAgent):
+            is_agent_found = True
+            break
+
+    assert is_agent_found, "TextAnalyzerAgent not found in agents"
+
+
 @pytest.mark.openai
 @skip_on_missing_imports(["openai"], "openai")
 def test_save(builder: AgentBuilder):