Telegram's rich-markdown renderer treats a lone "\n" as a soft break
(rendered as a space), so streamed tool-progress draft lines joined by a
single newline collapsed onto one line. Pass "\n\n" as the progress-draft
line separator for Telegram; it renders a blank line as a single break, so
each tool/thinking/commentary line gets its own line again. Other channels
keep the single-newline default, so Discord and the rest are unaffected.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
c847db550f