Hard line breaks mid-paragraph make docs harder to edit and diff — a one-word change reflows and re-diffs the whole paragraph. Reflow all tracked non-vendor Markdown (plus vendor/AGENTS.md) so each prose paragraph is a single line; soft-wrapping is the editor's job. Fenced code, tables, and list structure are preserved (wrapped list items fold to one line per bullet). Documents the convention in AGENTS.md.