aider/aider/website/_includes/multi-line.md

You can send long, multi-line messages in the chat in a few ways:

• Paste a multi-line message directly into the chat.
• Enter { alone on the first line to start a multiline message and } alone on the last line to end it.
• Enter {tag (where "tag" is any sequence of letters/numbers) and end with tag}. This is useful when you need to include closing braces } in your message.
• Use Meta-ENTER to start a new line without sending the message (Esc+ENTER in some environments).
• Use /paste to paste text from the clipboard into the chat.
• Use the /editor command to open your editor to create the next chat message. See editor configuration docs for more info.

Example with a tag:

{python
def hello():
    print("Hello}")  # Note: contains a brace
python}