/** * Positional descent builder. * * Given an anchor element (the result of pass 2's walk in the orchestration PR) * and the trail of intermediate elements between the anchor and the original * click target, produce the CSS-selector descent string. Each step in the * descent uses `tag:nth-of-type(n)` so the resulting selector resolves * unambiguously to the original target regardless of class-state churn. * * Matches ContentSquare's "position within identical markers" convention. * * Example: * * describeRelative(anchor, [
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