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"""
Type definitions for claude-py SDK.
All types match the structure from Claude Code API captures.
"""
from __future__ import annotations
from collections.abc import Awaitable, Callable
from typing import Any, Literal
from pydantic import BaseModel
ToolHandler = Callable[[str, dict[str, Any]], Awaitable[str]]
class ToolUse(BaseModel):
"""Tool use request from assistant."""
type: Literal["tool_use"]
id: str
name: str
input: dict[str, Any]
class TextContent(BaseModel):
"""Text content block."""
type: Literal["text"]
text: str
class ToolResult(BaseModel):
"""Tool execution result sent back to assistant."""
type: Literal["tool_result"]
tool_use_id: str
content: str
is_error: bool | None = False
class CacheControl(BaseModel):
"""Cache control for prompt caching."""
type: Literal["ephemeral"]
class SystemPromptBlock(BaseModel):
"""System prompt block with optional caching."""
type: Literal["text"]
text: str
cache_control: CacheControl | None = None
class Usage(BaseModel):
"""Token usage statistics."""
input_tokens: int
output_tokens: int
cache_creation_input_tokens: int | None = 0
cache_read_input_tokens: int | None = 0
class AssistantMessage(BaseModel):
"""Complete assistant response."""
id: str
type: Literal["message"]
role: Literal["assistant"]
content: list[dict[str, Any]]
model: str
stop_reason: str | None = None
stop_sequence: str | None = None
usage: Usage | None = None
@property
def text(self) -> str:
return "".join(b["text"] for b in self.content if b.get("type") == "text")
@property
def tool_calls(self) -> list[ToolUse]:
return [ToolUse.model_validate(b) for b in self.content if b.get("type") == "tool_use"]
@property
def has_tool_use(self) -> bool:
return self.stop_reason == "tool_use"
# Streaming event types
class StreamEvent(BaseModel):
"""Base class for streaming events."""
type: str
class MessageStartEvent(StreamEvent):
"""Stream event: message start."""
type: Literal["message_start"] = "message_start"
message: dict[str, Any]
class ContentBlockStartEvent(StreamEvent):
"""Stream event: content block start."""
type: Literal["content_block_start"] = "content_block_start"
index: int
content_block: dict[str, Any]
class ContentBlockDeltaEvent(StreamEvent):
"""Stream event: content block delta (incremental text)."""
type: Literal["content_block_delta"] = "content_block_delta"
index: int
delta: dict[str, Any]
class ContentBlockStopEvent(StreamEvent):
"""Stream event: content block stop."""
type: Literal["content_block_stop"] = "content_block_stop"
index: int
class MessageDeltaEvent(StreamEvent):
"""Stream event: message delta (stop_reason, etc)."""
type: Literal["message_delta"] = "message_delta"
delta: dict[str, Any]
usage: dict[str, Any] | None = None
class MessageStopEvent(StreamEvent):
"""Stream event: message stop."""
type: Literal["message_stop"] = "message_stop"
class PingEvent(StreamEvent):
"""Stream event: ping (keepalive)."""
type: Literal["ping"] = "ping"
class ErrorEvent(StreamEvent):
"""Stream event: error."""
type: Literal["error"] = "error"
error: dict[str, Any]
class AgentOptions(BaseModel):
"""Configuration options for Claude agent."""
model: str = "claude-sonnet-4-6"
max_tokens: int = 32000
stream: bool = True
effort: Literal["low", "medium", "high"] | None = None
allowed_tools: list[str] | None = None
disallowed_tools: list[str] | None = None
system_prompt: str | None = None
append_system_prompt: str | None = None
cwd: str = "/home/claude/host"
session_id: str | None = None
resume: str | None = None
device_id: str | None = None
account_uuid: str | None = None
class StreamChunk(BaseModel):
"""Represents a chunk of streaming data."""
event_type: str
data: dict[str, Any]
text_delta: str | None = None # Extracted text for convenience
content_block: dict[str, Any] | None = None
class StreamResponse:
"""Wrapper for streaming response that accumulates chunks."""
def __init__(self):
self.chunks: list[StreamChunk] = []
self.accumulated_text = ""
self.content_blocks: list[dict[str, Any]] = []
self.message_data: dict[str, Any] = {}
self.stop_reason: str | None = None
self.usage: dict[str, Any] | None = None
self.current_block: dict[str, Any] | None = None
def add_chunk(self, chunk: StreamChunk):
"""Add a chunk and update accumulated state."""
self.chunks.append(chunk)
if chunk.event_type == "message_start":
self.message_data = chunk.data.get("message", {})
elif chunk.event_type == "content_block_start":
self.current_block = chunk.data.get("content_block", {})
elif chunk.event_type == "content_block_delta":
delta = chunk.data.get("delta", {})
if delta.get("type") == "text_delta":
text = delta.get("text", "")
self.accumulated_text += text
# Update current block with accumulated text
if self.current_block:
self.current_block["text"] = self.accumulated_text
elif chunk.event_type == "content_block_stop":
if self.current_block:
self.content_blocks.append(self.current_block)
self.current_block = None
self.accumulated_text = ""
elif chunk.event_type == "message_delta":
delta = chunk.data.get("delta", {})
self.stop_reason = delta.get("stop_reason")
if chunk.data.get("usage"):
self.usage = chunk.data["usage"]
def to_message(self) -> AssistantMessage:
"""Convert accumulated stream to a complete AssistantMessage."""
return AssistantMessage(
id=self.message_data.get("id", ""),
type="message",
role="assistant",
content=self.content_blocks,
model=self.message_data.get("model", ""),
stop_reason=self.stop_reason,
usage=Usage(**self.usage) if self.usage else None,
)
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