diff --git a/src/history.ts b/src/history.ts
index 3effb6f..7f021a4 100644
--- a/src/history.ts
+++ b/src/history.ts
@@ -73,15 +73,26 @@ export function loadHistory(): PastPlaylist[] {
  */
 const archivable = (t: Track): Track => (t.preview === null ? t : { ...t, preview: null });
 
+const signatureOf = (tracks: Track[]) => tracks.map((t) => t.id).join(',');
+
 /**
  * Prepends a playlist to the history, newest first, capped at LIMIT. Pure: the
  * caller persists the result with saveHistory().
+ *
+ * A playlist identical to the newest entry is not archived again. Pressing
+ * Generate twice in a row archives the same untouched live playlist each time,
+ * and a strip of identical entries is worse than no entry.
  */
 export function archivePlaylist(
   history: PastPlaylist[],
   seed: string,
   tracks: Track[],
 ): PastPlaylist[] {
+  const newest = history[0];
+  if (newest && newest.seed === seed && signatureOf(newest.tracks) === signatureOf(tracks)) {
+    return history;
+  }
+
   const entry: PastPlaylist = {
     id: crypto.randomUUID(),
     savedAt: Date.now(),