pub fn early_pool<'a>(
challenges: &'a [Challenge],
context: &str,
topics: &[String],
done: &HashSet<&str>,
) -> Vec<(f64, &'a Challenge)>Expand description
early’s pool of plain lessons before the slots: every on-topic lesson not done over RELATIVE ×
the best of them, with its score. Never a standing lesson: those need no match (standing_pool).