The slackify_markdown library misses several patterns that LLMs commonly produce, causing raw Markdown symbols (**bold**, ##headers) to appear in Slack messages. Add _fixup_mrkdwn() post-processor that: - Converts leftover **bold** patterns (e.g. **Status:**OK where closing ** is adjacent to non-space chars) - Fixes & over-escaping in bare URLs - Protects code blocks from false-positive fixups Co-authored-by: Cursor <cursoragent@cursor.com>