Agent skill
_utils
Imported skill _utils from langchain
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/utils-bitwikiorg-skills-md
SKILL.md
"""Utility functions for middleware."""
from langchain_core.messages import SystemMessage
def append_to_system_message( system_message: SystemMessage | None, text: str, ) -> SystemMessage: """Append text to a system message.
Args:
system_message: Existing system message or None.
text: Text to add to the system message.
Returns:
New SystemMessage with the text appended.
"""
new_content: list[str | dict[str, str]] = list(system_message.content_blocks) if system_message else []
if new_content:
text = f"\n\n{text}"
new_content.append({"type": "text", "text": text})
return SystemMessage(content=new_content)
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