mirror of
https://github.com/Sea-Haven-Industries/open-swe.git
synced 2026-09-30 12:43:16 +00:00
65acc4c9d3
Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com> Co-authored-by: Johannes du Plessis <51395795+johannes117@users.noreply.github.com>
67 lines
2.1 KiB
Python
67 lines
2.1 KiB
Python
"""Middleware that removes malformed Anthropic thinking blocks before model calls."""
|
|
|
|
from __future__ import annotations
|
|
|
|
from collections.abc import Awaitable, Callable
|
|
from typing import Any
|
|
|
|
from langchain.agents.middleware import AgentMiddleware
|
|
from langchain.agents.middleware.types import ModelCallResult, ModelRequest, ModelResponse
|
|
from langchain_anthropic import ChatAnthropic
|
|
from langchain_core.messages import AIMessage
|
|
|
|
|
|
def _is_chat_anthropic(model: object) -> bool:
|
|
seen: set[int] = set()
|
|
current = model
|
|
for _ in range(10):
|
|
if isinstance(current, ChatAnthropic):
|
|
return True
|
|
current_id = id(current)
|
|
if current_id in seen:
|
|
return False
|
|
seen.add(current_id)
|
|
bound = getattr(current, "bound", None)
|
|
if bound is None or bound is current:
|
|
return False
|
|
current = bound
|
|
return False
|
|
|
|
|
|
def _sanitize_messages(messages: list[Any]) -> None:
|
|
for message in messages:
|
|
if not isinstance(message, AIMessage) or not isinstance(message.content, list):
|
|
continue
|
|
content = [
|
|
block
|
|
for block in message.content
|
|
if not (
|
|
isinstance(block, dict)
|
|
and block.get("type") == "thinking"
|
|
and not block.get("thinking")
|
|
)
|
|
]
|
|
if len(content) != len(message.content):
|
|
message.content = content
|
|
|
|
|
|
class SanitizeThinkingBlocksMiddleware(AgentMiddleware):
|
|
"""Drop empty Anthropic thinking blocks before provider validation."""
|
|
|
|
def wrap_model_call(
|
|
self,
|
|
request: ModelRequest,
|
|
handler: Callable[[ModelRequest], ModelResponse],
|
|
) -> ModelCallResult:
|
|
if _is_chat_anthropic(request.model):
|
|
_sanitize_messages(request.messages)
|
|
return handler(request)
|
|
|
|
async def awrap_model_call(
|
|
self,
|
|
request: ModelRequest,
|
|
handler: Callable[[ModelRequest], Awaitable[ModelResponse]],
|
|
) -> Any:
|
|
if _is_chat_anthropic(request.model):
|
|
_sanitize_messages(request.messages)
|
|
return await handler(request)
|