Finished the blog-agent project for now. The blog is now live, and the code is up at the GitHub project.
In summary, it lets me write my notes as text files in Dropbox, and it automatically formats and publishes it as a blog on S3. It runs by triggering an AWS Lambda function via a Dropbox webhook.
It's built purely for a workflow that I'm very used to (writing notes in text files, one file per month, posts separated by two hyphens padded with line breaks). But making this a public project will probably force me to keep things well-documented (so that I can fix things easily, if they break in the future).
Added the ability to auto-generate an atom.xml (for feeds), and auto-generate a Twitter feed-like index.html (with pagination).
It currently uses a custom hacky static-site generator (in Python), but it would be better to make this a wrapper around Hugo (and to move the Lambda runtime to OS/Go). That'll help improve the customizability, performance, and robustness.