chore: import upstream snapshot with attribution

browser_use/agent/message_manager/utils.py

@@ -0,0 +1,51 @@
+from __future__ import annotations
+
+import json
+import logging
+from pathlib import Path
+from typing import Any
+
+import anyio
+
+from browser_use.llm.messages import BaseMessage
+
+logger = logging.getLogger(__name__)
+
+
+async def save_conversation(
+	input_messages: list[BaseMessage],
+	response: Any,
+	target: str | Path,
+	encoding: str | None = None,
+) -> None:
+	"""Save conversation history to file asynchronously."""
+	target_path = Path(target)
+	# create folders if not exists
+	if target_path.parent:
+		await anyio.Path(target_path.parent).mkdir(parents=True, exist_ok=True)
+
+	await anyio.Path(target_path).write_text(
+		await _format_conversation(input_messages, response),
+		encoding=encoding or 'utf-8',
+	)
+
+
+async def _format_conversation(messages: list[BaseMessage], response: Any) -> str:
+	"""Format the conversation including messages and response."""
+	lines = []
+
+	# Format messages
+	for message in messages:
+		lines.append(f' {message.role} ')
+
+		lines.append(message.text)
+		lines.append('')  # Empty line after each message
+
+	# Format response
+	lines.append(json.dumps(json.loads(response.model_dump_json(exclude_unset=True)), indent=2, ensure_ascii=False))
+
+	return '\n'.join(lines)
+
+
+# Note: _write_messages_to_file and _write_response_to_file have been merged into _format_conversation
+# This is more efficient for async operations and reduces file I/O