@sema-agent/core/dist/core/frontmatter-fence.js

Stateless, task-oriented AI agent core

export const FRONTMATTER_FENCE = "---";
export const UNCLOSED_FRONTMATTER_REASON = "opens with --- but is not closed by a whole-line ---";
const FENCE_TAIL = /^[ \t]*\r?$/;
export function isFrontmatterFence(line) {
    return line.startsWith(FRONTMATTER_FENCE) && FENCE_TAIL.test(line.slice(FRONTMATTER_FENCE.length));
}