システムプロンプトの変更

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

// 重要：CLAUDE.mdを読み込むにはsettingSourcesを指定する必要があります
// claude_codeプリセットだけではCLAUDE.mdファイルは読み込まれません
const messages = [];

for await (const message of query({
  prompt: "Add a new React component for user profiles",
  options: {
    systemPrompt: {
      type: "preset",
      preset: "claude_code", // Claude Codeのシステムプロンプトを使用
    },
    settingSources: ["project"], // プロジェクトからCLAUDE.mdを読み込むために必要
  },
})) {
  messages.push(message);
}

// これでClaudeはCLAUDE.mdからプロジェクトガイドラインにアクセスできます

import { writeFile, mkdir } from "fs/promises";
import { join } from "path";
import { homedir } from "os";

async function createOutputStyle(
  name: string,
  description: string,
  prompt: string
) {
  // ユーザーレベル：~/.claude/output-styles
  // プロジェクトレベル：.claude/output-styles
  const outputStylesDir = join(homedir(), ".claude", "output-styles");

  await mkdir(outputStylesDir, { recursive: true });

  const content = `---
name: ${name}
description: ${description}
---

${prompt}`;

  const filePath = join(
    outputStylesDir,
    `${name.toLowerCase().replace(/\s+/g, "-")}.md`
  );
  await writeFile(filePath, content, "utf-8");
}

// 例：コードレビュースペシャリストの作成
await createOutputStyle(
  "Code Reviewer",
  "Thorough code review assistant",
  `You are an expert code reviewer.

For every code submission:
1. Check for bugs and security issues
2. Evaluate performance
3. Suggest improvements
4. Rate code quality (1-10)`
);

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

const messages = [];

for await (const message of query({
  prompt: "Help me write a Python function to calculate fibonacci numbers",
  options: {
    systemPrompt: {
      type: "preset",
      preset: "claude_code",
      append:
        "Always include detailed docstrings and type hints in Python code.",
    },
  },
})) {
  messages.push(message);
  if (message.type === "assistant") {
    console.log(message.message.content);
  }
}

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

const customPrompt = `You are a Python coding specialist.
Follow these guidelines:
- Write clean, well-documented code
- Use type hints for all functions
- Include comprehensive docstrings
- Prefer functional programming patterns when appropriate
- Always explain your code choices`;

const messages = [];

for await (const message of query({
  prompt: "Create a data processing pipeline",
  options: {
    systemPrompt: customPrompt,
  },
})) {
  messages.push(message);
  if (message.type === "assistant") {
    console.log(message.message.content);
  }
}

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

// 「Code Reviewer」出力スタイルが有効であると仮定（/output-style経由）
// セッション固有の重点領域を追加
const messages = [];

for await (const message of query({
  prompt: "Review this authentication module",
  options: {
    systemPrompt: {
      type: "preset",
      preset: "claude_code",
      append: `
        For this review, prioritize:
        - OAuth 2.0 compliance
        - Token storage security
        - Session management
      `,
    },
  },
})) {
  messages.push(message);
}