Development record

The raw-heading title is cut at the first closing tag of ANY element, so inline markup inside a heading element — an anchor then text, or emphasis on the first word — truncates or empties the title and the excluded section is admitted (refused before the seventh-round commit); bound the title at the opening element's own closing tag, the next heading open, or a blank line. Also: blockCloser trims indentation before testing three dots so an indented ellipsis inside a block scalar closes the block and refuses the file (test at column 0 only); the double-quoted span does not honour an escaped quote; the setext loop reads the frontmatter closer as an underline of a column-0 last frontmatter line.