For AI agents: the complete documentation index is available at https://open-spaced-repetition.github.io/ts-fsrs/ja-JP/llms.txt, the full documentation bundle is available at https://open-spaced-repetition.github.io/ts-fsrs/ja-JP/llms-full.txt, and this page is available as Markdown at https://open-spaced-repetition.github.io/ts-fsrs/ja-JP/updates/fsrs/5.4.2.md.