Variable: TYPOGRAPHY\_RULE

const TYPOGRAPHY_RULE: "Never use emojis. Use hyphens (-) only, never em dashes or en dashes." = "Never use emojis. Use hyphens (-) only, never em dashes or en dashes."

One sentence, safe to append to any instruction block.

Phrased as a standalone sentence (not a list fragment) so it reads correctly whether the surrounding prompt is joined with newlines or spaces.