from __future__ import annotations

import re

SLACK_MENTION_STRIP_PATTERN = re.compile(r"<@[^>\s]+>")


def strip_mentions(text: str) -> str:
    return SLACK_MENTION_STRIP_PATTERN.sub("", text).strip()


def extract_mentions(text: str) -> list[str]:
    return re.findall(r"<@([A-Z0-9]+)>", text)