The **remark‑preset** package provides a ready‑made Unified/Remark preset that enforces the “flex development” (fldv) Markdown style guidelines. It bundles a collection of remark‑lint rules (e.g., emphasis‑marker, final‑newline, etc.) and can be dropped into any Node, Deno, or browser project to lint and format Markdown files according to those conventions. It’s aimed at developers who want a consistent, opinionated Markdown linting configuration out‑of‑the‑box.