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Create app.py
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app.py
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import os
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import gradio as gr
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from dotenv import load_dotenv
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from strands import Agent
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from strands.models.litellm import LiteLLMModel
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from mcp.client.streamable_http import streamablehttp_client
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from strands.tools.mcp.mcp_client import MCPClient
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load_dotenv()
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os.environ["STRANDS_TOOL_CONSOLE_MODE"] = "enabled"
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def create_streamable_http_transport():
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return streamablehttp_client(os.environ["MCP_SERVER"])
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streamable_http_mcp_client = MCPClient(create_streamable_http_transport)
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model = LiteLLMModel(
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client_args={
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"api_key": os.environ["OPENROUTER_API_KEY"],
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"api_base": "https://openrouter.ai/api/v1",
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},
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model_id="openrouter/google/gemini-2.5-flash"
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)
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SYSTEM_PROMPT = """
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You are an Image Agent that allows users to generate an image using prompt or edit images
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using prompt. Always render the images as markdown
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"""
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def convert_history(history):
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"""
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Convert Gradio 6 history format:
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[{"role": "...", "content": [{"text": "..."}]}]
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Into Required format:
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[{"role": "...", "content": "..."}]
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"""
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messages = []
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for msg in history:
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# Gradio packs content into list of content blocks
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if isinstance(msg["content"], list):
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# extract just the text pieces
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text = "".join(block.get("text", "") for block in msg["content"])
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else:
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text = msg["content"]
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messages.append({"role": msg["role"], "content": text})
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return messages
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def response_generator(message, history):
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"""
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Response Generator
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"""
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messages = convert_history(history) if history else []
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agent_messages = []
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for msg in messages:
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agent_messages.append({
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"role": msg["role"],
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"content": [{"text": msg["content"]}]
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})
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with streamable_http_mcp_client:
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# Get the tools from the MCP server
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tools = streamable_http_mcp_client.list_tools_sync()
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image_agent = Agent(
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model=model,
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system_prompt=SYSTEM_PROMPT,
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tools=tools,
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messages=agent_messages
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)
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print(agent_messages)
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messages.append({"role": "user", "content": message})
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response = image_agent(message)
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response = response.message["content"][0]["text"]
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response = response.replace("sandbox:/", "")
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yield response
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demo = gr.ChatInterface(
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fn=response_generator,
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examples=[["A scenic landscape with mountains, a river, and a clear blue sky", None]],
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title="Image Agent"
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)
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demo.launch()
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