research notes and technical writing.https://rayarmy.org/en-ushttps://rayarmy.org/en/post/hello-world/https://rayarmy.org/en/post/hello-world/rayarmy.org now runs entirely on Markdown files committed to this repo — no CMS in the loop.Tue, 25 Aug 2026 00:00:00 GMTArticleskd992102@gmail.com (Ray)