Agent SDK の概要

import asyncio
from datetime import datetime
from claude_agent_sdk import query, ClaudeAgentOptions, HookMatcher


async def log_file_change(input_data, tool_use_id, context):
    file_path = input_data.get("tool_input", {}).get("file_path", "unknown")
    with open("./audit.log", "a") as f:
        f.write(f"{datetime.now()}: modified {file_path}\n")
    return {}


async def main():
    async for message in query(
        prompt="Refactor utils.py to improve readability",
        options=ClaudeAgentOptions(
            permission_mode="acceptEdits",
            hooks={
                "PostToolUse": [
                    HookMatcher(matcher="Edit|Write", hooks=[log_file_change])
                ]
            },
        ),
    ):
        if hasattr(message, "result"):
            print(message.result)


asyncio.run(main())

import { query, HookCallback } from "@anthropic-ai/claude-agent-sdk";
import { appendFile } from "fs/promises";

const logFileChange: HookCallback = async (input) => {
  const filePath = (input as any).tool_input?.file_path ?? "unknown";
  await appendFile("./audit.log", `${new Date().toISOString()}: modified ${filePath}\n`);
  return {};
};

for await (const message of query({
  prompt: "Refactor utils.py to improve readability",
  options: {
    permissionMode: "acceptEdits",
    hooks: {
      PostToolUse: [{ matcher: "Edit|Write", hooks: [logFileChange] }]
    }
  }
})) {
  if ("result" in message) console.log(message.result);
}

import asyncio
from claude_agent_sdk import query, ClaudeAgentOptions, AgentDefinition


async def main():
    async for message in query(
        prompt="Use the code-reviewer agent to review this codebase",
        options=ClaudeAgentOptions(
            allowed_tools=["Read", "Glob", "Grep", "Agent"],
            agents={
                "code-reviewer": AgentDefinition(
                    description="Expert code reviewer for quality and security reviews.",
                    prompt="Analyze code quality and suggest improvements.",
                    tools=["Read", "Glob", "Grep"],
                )
            },
        ),
    ):
        if hasattr(message, "result"):
            print(message.result)


asyncio.run(main())

import { query } from "@anthropic-ai/claude-agent-sdk";

for await (const message of query({
  prompt: "Use the code-reviewer agent to review this codebase",
  options: {
    allowedTools: ["Read", "Glob", "Grep", "Agent"],
    agents: {
      "code-reviewer": {
        description: "Expert code reviewer for quality and security reviews.",
        prompt: "Analyze code quality and suggest improvements.",
        tools: ["Read", "Glob", "Grep"]
      }
    }
  }
})) {
  if ("result" in message) console.log(message.result);
}

import asyncio
from claude_agent_sdk import query, ClaudeAgentOptions


async def main():
    async for message in query(
        prompt="Open example.com and describe what you see",
        options=ClaudeAgentOptions(
            mcp_servers={
                "playwright": {"command": "npx", "args": ["@playwright/mcp@latest"]}
            }
        ),
    ):
        if hasattr(message, "result"):
            print(message.result)


asyncio.run(main())

import { query } from "@anthropic-ai/claude-agent-sdk";

for await (const message of query({
  prompt: "Open example.com and describe what you see",
  options: {
    mcpServers: {
      playwright: { command: "npx", args: ["@playwright/mcp@latest"] }
    }
  }
})) {
  if ("result" in message) console.log(message.result);
}

import asyncio
from claude_agent_sdk import query, ClaudeAgentOptions


async def main():
    async for message in query(
        prompt="Review this code for best practices",
        options=ClaudeAgentOptions(
            allowed_tools=["Read", "Glob", "Grep"],
        ),
    ):
        if hasattr(message, "result"):
            print(message.result)


asyncio.run(main())

import { query } from "@anthropic-ai/claude-agent-sdk";

for await (const message of query({
  prompt: "Review this code for best practices",
  options: {
    allowedTools: ["Read", "Glob", "Grep"]
  }
})) {
  if ("result" in message) console.log(message.result);
}

import asyncio
from claude_agent_sdk import query, ClaudeAgentOptions, SystemMessage, ResultMessage


async def main():
    session_id = None

    # First query: capture the session ID
    async for message in query(
        prompt="Read the authentication module",
        options=ClaudeAgentOptions(allowed_tools=["Read", "Glob"]),
    ):
        if isinstance(message, SystemMessage) and message.subtype == "init":
            session_id = message.data["session_id"]

    # Resume with full context from the first query
    async for message in query(
        prompt="Now find all places that call it",  # "it" = auth module
        options=ClaudeAgentOptions(resume=session_id),
    ):
        if isinstance(message, ResultMessage):
            print(message.result)


asyncio.run(main())

import { query } from "@anthropic-ai/claude-agent-sdk";

let sessionId: string | undefined;

// First query: capture the session ID
for await (const message of query({
  prompt: "Read the authentication module",
  options: { allowedTools: ["Read", "Glob"] }
})) {
  if (message.type === "system" && message.subtype === "init") {
    sessionId = message.session_id;
  }
}

// Resume with full context from the first query
for await (const message of query({
  prompt: "Now find all places that call it", // "it" = auth module
  options: { resume: sessionId }
})) {
  if ("result" in message) console.log(message.result);
}