feat: unified capabilities (Graph + Parallel + Conversation + Agent + KnowledgeStore)

purpose_agent/__init__.py

@@ -81,6 +81,12 @@ from purpose_agent.registry import (
     EmbeddingBackend, default_embedding,
 )
 
+# Unified Capabilities (LangGraph + CrewAI + AutoGen + OpenAI SDK + LlamaIndex)
+from purpose_agent.unified import (
+    Agent, Graph, parallel, Conversation, KnowledgeStore,
+    START, END, Message,
+)
+
 __all__ = [
     # Core
     "State", "Action", "Trajectory", "TrajectoryStep", "Heuristic",
@@ -110,4 +116,7 @@ __all__ = [
     # Plugin Registry
     "PluginRegistry", "backend_registry", "callback_registry", "model_registry",
     "EmbeddingBackend", "default_embedding",
+    # Unified Capabilities
+    "Agent", "Graph", "parallel", "Conversation", "KnowledgeStore",
+    "START", "END", "Message",
 ]