diff --git a/internal/playlists/system.go b/internal/playlists/system.go
index 63c1f800..7bb03c20 100644
--- a/internal/playlists/system.go
+++ b/internal/playlists/system.go
@@ -151,14 +151,22 @@ var systemMixWeights = recommendation.ScoringWeights{
 
 // forYouHeadN is the number of top-scored tracks that anchor the For-You
 // playlist; forYouTailN is the number sampled from positions 2*headN
-// onward, daily-deterministic via tieBreakHash. The 12 + 13 split
+// onward, daily-deterministic via tieBreakHash. The 50 + 50 split
 // (~50% from the tail) gives the user a substantially different mix
 // day-to-day while preserving a recognizable anchor of strong
-// similarity matches. Songs-like-X keeps simple pickTopN (the
+// similarity matches.
+//
+// Sized to 100 to match Discover so the shuffle-on-play default
+// (system playlists shuffle when launched from a tile) has a deep
+// enough pool that re-plays within a day feel varied. Libraries with
+// a thin For-You candidate pool degrade gracefully: pickHeadAndTail
+// returns top-N-by-score when the capped pool can't support a full
+// head/tail split, exactly as Discover returns fewer than 100 when
+// its buckets are thin. Songs-like-X keeps simple pickTopN (the
 // seed-artist context already frames the "you'll like this" promise).
 const (
-	forYouHeadN = 12
-	forYouTailN = 13
+	forYouHeadN = 50
+	forYouTailN = 50
 )
 
 // scoreAndSortCandidates scores every candidate with recommendation.Score