Markdown semantic line breaks

When authoring or editing prose in any .md file under specs/ or doc/, start a new line after a full stop only when that break is semantically right for the paragraph (a distinct thought, requirement, or reviewable unit), and where the line still fits within the limit below.

A full stop is not an automatic line break: abbreviations, decimals, version numbers, and other non-terminal stops stay on the same line; some sentences belong on one line together when they read as one unit.

You MAY break further at major clause boundaries (after ;, :, em-dashes, or before a long parenthetical aside).

This convention is known as Semantic Line Breaks (also "ventilated prose" or "semantic linefeeds"). See https://sembr.org for the canonical statement.

Line length (80 characters)