pip install jamjet

<dependency>
    <groupId>dev.jamjet</groupId>
    <artifactId>jamjet-sdk</artifactId>
    <version>0.5.0</version>
</dependency>

implementation("dev.jamjet:jamjet-sdk:0.5.0")

implementation 'dev.jamjet:jamjet-sdk:0.5.0'

<properties>
    <maven.compiler.source>21</maven.compiler.source>
    <maven.compiler.target>21</maven.compiler.target>
</properties>

# agent.py
from jamjet import task, tool

@tool
async def web_search(query: str) -> str:
    """Search the web for current information."""
    # plug in your actual search implementation
    return f"Results for: {query}"

@task(model="claude-sonnet-4-6", tools=[web_search])
async def research(question: str) -> str:
    """You are a research assistant. Search first, then summarize clearly."""

import asyncio
result = asyncio.run(research("What is JamJet?"))
print(result)

import dev.jamjet.tool.Tool;
import dev.jamjet.tool.ToolCall;

@Tool(description = "Search the web for information about a topic")
record WebSearch(String query) implements ToolCall<String> {
    public String execute() {
        // In production, call your search API here
        return "Results for '" + query + "': JamJet is a performance-first, "
                + "agent-native runtime and framework for AI agents.";
    }
}

import dev.jamjet.agent.Agent;

var agent = Agent.builder("researcher")
        .model("claude-haiku-4-5-20251001")
        .tools(WebSearch.class)
        .instructions("You are a helpful research assistant. "
                + "Always search first, then provide a thorough summary.")
        .strategy("react")
        .maxIterations(5)
        .build();

ANTHROPIC_API_KEY=sk-ant-... python agent.py

public static void main(String[] args) {
    var agent = Agent.builder("researcher")
            .model("claude-haiku-4-5-20251001")
            .tools(WebSearch.class)
            .instructions("You are a helpful research assistant. "
                    + "Always search first, then provide a thorough summary.")
            .strategy("react")
            .maxIterations(5)
            .build();

    var result = agent.run("What is JamJet?");

    System.out.println(result.output());
    System.out.printf("Duration: %.2f ms%n", result.durationUs() / 1000.0);
    System.out.printf("Tool calls: %d%n", result.toolCalls().size());
}

export OPENAI_API_KEY=sk-...
mvn compile exec:java -Dexec.mainClass=com.example.MyAgent