update_lights.py
1#!/usr/bin/env -S uv run --script --quiet
2# /// script
3# requires-python = ">=3.12"
4# dependencies = ["marvin@git+https://github.com/prefecthq/marvin.git"]
5# ///
6"""
7Make some change to my phillips hue network of lights via agent + MCP server.
8
9Usage:
10
11```bash
12./update-lights -m "turn on sahara in the living room and nightlight in the kitchen"
13```
14
15Details:
16- uses a [`marvin`](https://github.com/prefecthq/marvin) (built on [`pydantic-ai`](https://github.com/pydantic/pydantic-ai)) agent
17- the agent spins up a [`fastmcp`](https://github.com/jlowin/fastmcp) MCP server that talks to my [`phue`](https://github.com/studioimaginaire/phue) bridge
18- set `HUE_BRIDGE_IP` and `HUE_BRIDGE_USERNAME` in `.env` or otherwise in environment
19- uses `OPENAI_API_KEY` by default, but you can set `AI_MODEL` in `.env` or otherwise in environment to use a different model
20"""
21
22import marvin
23import argparse
24from pydantic_settings import BaseSettings, SettingsConfigDict
25from pydantic import Field
26from pydantic_ai.mcp import MCPServerStdio
27from pydantic_ai.models import KnownModelName
28from rich.console import Console
29from rich.panel import Panel
30from rich.prompt import Prompt
31
32
33class Settings(BaseSettings):
34 model_config = SettingsConfigDict(env_file=".env", extra="ignore")
35
36 hue_bridge_ip: str = Field(default=...)
37 hue_bridge_username: str = Field(default=...)
38 anthropic_api_key: str | None = Field(default=None)
39
40 ai_model: KnownModelName = Field(default="anthropic:claude-opus-4-5")
41
42
43settings = Settings()
44console = Console()
45
46hub_mcp = MCPServerStdio(
47 command="uvx",
48 args=[
49 "smart-home@git+https://github.com/jlowin/fastmcp.git#subdirectory=examples/smart_home"
50 ],
51 env={
52 "HUE_BRIDGE_IP": settings.hue_bridge_ip,
53 "HUE_BRIDGE_USERNAME": settings.hue_bridge_username,
54 },
55)
56
57
58if __name__ == "__main__":
59 import os
60
61 if settings.anthropic_api_key:
62 os.environ["ANTHROPIC_API_KEY"] = settings.anthropic_api_key
63
64 parser = argparse.ArgumentParser(description="Send a command to the Marvin agent.")
65 parser.add_argument(
66 "--message",
67 "-m",
68 type=str,
69 default="soft and dim - Jessica Pratt energy, all areas",
70 help="The message to send to the agent (defaults to 'soft and dim - Jessica Pratt energy, all areas').",
71 )
72 parser.add_argument(
73 "--once",
74 action="store_true",
75 help="Run once and exit instead of entering interactive mode.",
76 )
77 args = parser.parse_args()
78
79 agent = marvin.Agent(
80 model=settings.ai_model,
81 mcp_servers=[hub_mcp],
82 )
83
84 console.print(
85 Panel.fit(
86 f"[bold cyan]🏠 lights agent[/bold cyan]\n"
87 f"[dim]model: {settings.ai_model}[/dim]",
88 border_style="blue",
89 )
90 )
91
92 with marvin.Thread():
93 console.print(f"\n[bold yellow]→[/bold yellow] {args.message}")
94 agent.run(str(args.message))
95
96 if not args.once:
97 while True:
98 try:
99 user_input = Prompt.ask(
100 "\n[bold green]enter a message[/bold green]"
101 )
102 console.print(f"[bold yellow]→[/bold yellow] {user_input}")
103 agent.run(str(user_input))
104 except KeyboardInterrupt:
105 console.print("\n[dim red]exiting...[/dim red]")
106 break