Markdown Unwrap

Reflow a markdown (or .qmd) file so that each sentence occupies its own line. This is the inverse of hard-wrapping: mid-sentence newlines are removed and the text is re-broken only at sentence endings.

Input Arguments

Position	Required	Description
1	Yes	Path to the input .md or .qmd file
2	No	Output path. Defaults to overwriting the input file in-place

Example invocations:

/markdown-unwrap paper/paper.qmd
/markdown-unwrap README.md README-unwrapped.md

Algorithm

Process the file line-by-line, maintaining a current paragraph buffer:

1. Pass-through lines — output immediately, do not buffer:

   • Blank lines (flush the buffer first, then emit the blank line)
   • ATX headings (#, ##, …)
   • Fenced code block delimiters (``` or ~~~); toggle a in-code-block flag and pass all lines through until the closing fence
   • Block-quote lines starting with >
   • List item lines starting with -, *, +, or a digit followed by ./)
   • YAML front-matter delimiters --- / ... (pass the entire front-matter block through unchanged)

2. Buffering — for all other lines, append the line's text to the current buffer (joining with a single space, trimming leading/trailing whitespace from each line).