hexo new post $1 | micro $(awk '{print $3}')

Very likely not the most elegant solution. The input must be something that can be turned into an URL (like with dashes between words) and then I can edit the title afterwards in the frontmatter.

Also awk always feels a bit like cheating.

But I do need to stop thinking posting something here or on my main blog demands any more complication than a two-letter command.