Use Claude Code features in the SDK

from claude_agent_sdk import query, ClaudeAgentOptions, AssistantMessage, ResultMessage

async for message in query(
    prompt="Help me refactor the auth module",
    options=ClaudeAgentOptions(
        # "user" loads from ~/.claude/, "project" loads from ./.claude/ in cwd.
        # Together they give the agent access to CLAUDE.md, skills, hooks, and
        # permissions from both locations.
        setting_sources=["user", "project"],
        allowed_tools=["Read", "Edit", "Bash"],
    ),
):
    if isinstance(message, AssistantMessage):
        for block in message.content:
            if hasattr(block, "text"):
                print(block.text)
    if isinstance(message, ResultMessage) and message.subtype == "success":
        print(f"\nResult: {message.result}")

from claude_agent_sdk import query, ClaudeAgentOptions, ResultMessage

# Skills in .claude/skills/ are discovered automatically
# when settingSources includes "project"
async for message in query(
    prompt="Review this PR using our code review checklist",
    options=ClaudeAgentOptions(
        setting_sources=["user", "project"],
        allowed_tools=["Skill", "Read", "Grep", "Glob"],
    ),
):
    if isinstance(message, ResultMessage) and message.subtype == "success":
        print(message.result)

from claude_agent_sdk import query, ClaudeAgentOptions, HookMatcher, ResultMessage


# PreToolUse hook callback. Positional args:
#   input_data: HookInput dict with tool_name, tool_input, hook_event_name
#   tool_use_id: str | None, the ID of the tool call being intercepted
#   context: HookContext, carries session metadata
async def audit_bash(input_data, tool_use_id, context):
    command = input_data.get("tool_input", {}).get("command", "")
    if "rm -rf" in command:
        return {"decision": "block", "reason": "Destructive command blocked"}
    return {}  # Empty dict: allow the tool to proceed


# Filesystem hooks from .claude/settings.json run automatically
# when settingSources loads them. You can also add programmatic hooks:
async for message in query(
    prompt="Refactor the auth module",
    options=ClaudeAgentOptions(
        setting_sources=["project"],  # Loads hooks from .claude/settings.json
        hooks={
            "PreToolUse": [
                HookMatcher(matcher="Bash", hooks=[audit_bash]),
            ]
        },
    ),
):
    if isinstance(message, ResultMessage) and message.subtype == "success":
        print(message.result)