Google 엔지니어의 검증형 Prompt 설계

def get_diff() -> str:
    """Pulls the actual staged diff from git, falling back to unstaged."""
    result = subprocess.run(
        ["git", "diff", "--staged"], capture_output=True, text=True, check=True
    )
    diff = result.stdout
    if not diff.strip():
        result = subprocess.run(["git", "diff"], capture_output=True, text=True, check=True)
        diff = result.stdout
    return diff

def review_diff(diff: str) -> str:
    """Sends the diff to the model and returns the markdown review."""
    client = anthropic.Anthropic(api_key=os.environ["ANTHROPIC_API_KEY"])
    response = client.messages.create(
        model="claude-sonnet-4-6",
        max_tokens=2000,
        messages=[{"role": "user", "content": REVIEW_PROMPT.format(diff=diff)}],
    )
    return "".join(block.text for block in response.content if block.type == "text")

def main():
    diff = get_diff()
    if not diff.strip():
        print("No changes to review.")
        sys.exit(0)
    report = review_diff(diff)
    with open("review_report.md", "w") as f:
        f.write(report)
    print(report)