v1.0.0

• The authoring guide for AI assistants and the usage of the command line are packaged as an Agent Skill, attached to each release: markdown-design-doc-skill.zip. Upload it to Claude, or unzip it into the skills folder of Claude Code or another assistant, and it is used when the assistant is asked to write a design document, in English or in Japanese.
• The authoring guide for AI assistants tells how to use footnotes for side notes, and folded <details> sections for content that does not need to be read every time, such as the change history.
• The command line can write a list of the exported documents with --index: index.html in the output folder, with a table for each folder of the documents' titles (linked), file names, and the version, product, status and updated of their front matter. Its title is set with --index-title.
• A sample design document exported to HTML is published on GitHub Pages (English, Japanese), to try the arrow ⇔ heading highlighting, sticky table headers and footnote popups in a browser.