The latest version of #madblog introduces a separate page, under /unlisted, for posts that the author can send to the Fediverse (or simply keep in a separate area of their blog) without publishing them on the index.
This is useful for quick thoughts and interactions. Worth enough to mention, but not enough to deserve their own dedicate article on the blog frontpage.
To create an unlisted post, simply create a Markdown file under /replies/ with no like-of and reply-to metadata headers:
cd $MADBLOG_DATADIR
mkdir -p replies
cat <<EOF > replies/unlisted-post.md
# My first unlisted post
I thought that it'd be cool to share with my followers on Mastodon that now I can trace likes and replies with git bisect.
I'll also tag @friend@nerds.tech because he'll probably think it's cool.
EOF
Save the file, then you will find your post on the /unlisted page.
Example on my blog: https://blog.fabiomanganiello.com/unlisted.