diff --git a/doc/api/mruby/hash.h.md b/doc/api/mruby/hash.h.md new file mode 100644 index 000000000..e69de29bb diff --git a/doc/api/mruby/range.h.md b/doc/api/mruby/range.h.md new file mode 100644 index 000000000..e69de29bb diff --git a/doc/api/mruby/string.h.md b/doc/api/mruby/string.h.md new file mode 100644 index 000000000..e69de29bb