The framework for
building agents

# Identity
You are an expert weather assistant.
You can fetch the weather for any
city in the world.

import{ defineAgent }from"eve";
exportdefaultdefineAgent({
 model:"openai/gpt-5.4-mini",
});

---
description: Research unfamiliar topics
---
When the task is novel or ambiguous,
gather evidence first, then answer.

import{ defineTool }from"eve/tools";
import{ z }from"zod";
exportdefaultdefineTool({
 description:"Get the weather for a city",
 inputSchema: z.object({
 cityName: z.string(),
}),
asyncexecute(input){
const res =awaitfetch(
`${process.env.WEATHER_API_URL}/current?city=${input.cityName}`
);
const data =await res.json();
return data.current_condition[0];
},
});

import{
 defineSandbox,
 vercelSandboxBackend,
}from"eve/sandbox";
exportdefaultdefineSandbox({
 backend:vercelSandboxBackend({
 runtime:"node24",
}),
});

import{ connectSlackCredentials }from"@vercel/connect/eve";
import{ slackChannel }from"eve/channels/slack";
exportdefaultslackChannel({
 credentials:connectSlackCredentials("slack/my-agent"),
});

import{ connect }from"@vercel/connect/eve";
import{ defineMcpClientConnection }from"eve/connections";
exportdefaultdefineMcpClientConnection({
 url:"https://mcp.linear.app/sse",
 description:"Linear workspace: issues, projects, cycles, and comments.",
 auth:connect("linear"),
});

import{ defineAgent }from"eve";
exportdefaultdefineAgent({
 description:"Investigate questions",
 model:"openai/gpt-5.4",
});

---
cron:"0 8 * * *"
---
Send the user a daily weather
digest for their saved cities.