feat: Added Podcast Feature and its actually fast.

- Fully Async

surfsense_backend/app/agents/podcaster/graph.py

@@ -6,18 +6,26 @@ from .state import State
 
 from .nodes import create_merged_podcast_audio, create_podcast_transcript
 
-# Define a new graph
-workflow = StateGraph(State, config_schema=Configuration)
 
-# Add the node to the graph
-workflow.add_node("create_podcast_transcript", create_podcast_transcript)
-workflow.add_node("create_merged_podcast_audio", create_merged_podcast_audio)
+def build_graph():
+    
+    # Define a new graph
+    workflow = StateGraph(State, config_schema=Configuration)
 
-# Set the entrypoint as `call_model`
-workflow.add_edge("__start__", "create_podcast_transcript")
-workflow.add_edge("create_podcast_transcript", "create_merged_podcast_audio")
-workflow.add_edge("create_merged_podcast_audio", "__end__")
+    # Add the node to the graph
+    workflow.add_node("create_podcast_transcript", create_podcast_transcript)
+    workflow.add_node("create_merged_podcast_audio", create_merged_podcast_audio)
 
-# Compile the workflow into an executable graph
-graph = workflow.compile()
-graph.name = "Surfsense Podcaster"  # This defines the custom name in LangSmith
+    # Set the entrypoint as `call_model`
+    workflow.add_edge("__start__", "create_podcast_transcript")
+    workflow.add_edge("create_podcast_transcript", "create_merged_podcast_audio")
+    workflow.add_edge("create_merged_podcast_audio", "__end__")
+
+    # Compile the workflow into an executable graph
+    graph = workflow.compile()
+    graph.name = "Surfsense Podcaster"  # This defines the custom name in LangSmith
+    
+    return graph
+
+# Compile the graph once when the module is loaded
+graph = build_graph()

surfsense_backend/app/agents/podcaster/nodes.py

@@ -28,7 +28,7 @@ async def create_podcast_transcript(state: State, config: RunnableConfig) -> Dic
     # Create the messages
     messages = [
         SystemMessage(content=prompt),
-        HumanMessage(content=state.source_content)
+        HumanMessage(content=f"<source_content>{state.source_content}</source_content>")
     ]
     
     # Generate the podcast transcript

surfsense_backend/app/agents/podcaster/prompts.py

@@ -106,6 +106,6 @@ Output:
 }}
 </examples>
 
-Transform the source material into a lively and engaging podcast conversation. Craft dialogue that showcases authentic host chemistry and natural interaction (including occasional disagreement, building on points, or asking follow-up questions). Use varied speech patterns reflecting real human conversation, ensuring the final script effectively educates *and* entertains the listener while keeping within a 3-minute audio duration.
+Transform the source material into a lively and engaging podcast conversation. Craft dialogue that showcases authentic host chemistry and natural interaction (including occasional disagreement, building on points, or asking follow-up questions). Use varied speech patterns reflecting real human conversation, ensuring the final script effectively educates *and* entertains the listener while keeping within a 5-minute audio duration.
 </podcast_generation_system>
 """