diff --git a/docs/watch-history-logging.md b/docs/watch-history-logging.md
new file mode 100644
index 00000000..b5cf1e89
--- /dev/null
+++ b/docs/watch-history-logging.md
@@ -0,0 +1,15 @@
+# Watch History Logging Cheatsheet
+
+The watch history publisher emits developer-mode console messages from `publishWatchHistorySnapshot()`.
+
+- `Watch history snapshot updated` (info) — all chunks and the index event were accepted by at least one relay. The summary includes:
+  - `actor`: abbreviated pubkey that authored the snapshot.
+  - `itemCount`: number of watch history entries that made it into the snapshot payload.
+  - `snapshot`: identifier constructed from the current unix timestamp and a random suffix.
+  - `latestPointer`: truncated pointer key for the newest watch entry that survived chunking.
+  - `latestWatchedAt`: ISO timestamp derived from the most recent entry's `watchedAt` (falls back to `Date.now()` when missing).
+- `Watch history snapshot publish incomplete` (warning) — at least one chunk or the index event failed to reach any relay. When this fires the snapshot is still cached locally and the client will retry publication later.
+
+Errors that precede the info log do **not** necessarily indicate a failure. For example, a message like `WebSocket connection to 'ws://127.0.0.1:4869/' failed` simply means one relay in the user's configured relay list is offline. The publisher only requires that at least one relay accepts each chunk before reporting success.
+
+Refer to the log source in `js/nostr.js` for the exact structure and retry behavior.
diff --git a/js/nostr.js b/js/nostr.js
index 70221267..c23c7579 100644
--- a/js/nostr.js
+++ b/js/nostr.js
@@ -2558,6 +2558,35 @@ class NostrClient {
       this.scheduleWatchHistoryRepublish(normalizedActor, persistedItems);
     }
 
+    if (isDevMode) {
+      const latestItem = persistedItems[0] || null;
+      const latestPointerKey = pointerKey(latestItem);
+      const latestPointerSummary = latestPointerKey
+        ? latestPointerKey.length > 32
+          ? `${latestPointerKey.slice(0, 32)}…`
+          : latestPointerKey
+        : null;
+      const actorPreview =
+        normalizedActor.length > 16
+          ? `${normalizedActor.slice(0, 8)}…${normalizedActor.slice(-4)}`
+          : normalizedActor;
+      const summary = {
+        actor: actorPreview,
+        itemCount: persistedItems.length,
+        snapshot: snapshotId,
+        latestPointer: latestPointerSummary,
+        latestWatchedAt: Number.isFinite(latestItem?.watchedAt)
+          ? new Date(Math.max(0, Math.floor(latestItem.watchedAt))).toISOString()
+          : null,
+      };
+
+      if (overallSuccess) {
+        console.info("[nostr] Watch history snapshot updated:", summary);
+      } else {
+        console.warn("[nostr] Watch history snapshot publish incomplete:", summary);
+      }
+    }
+
     const pointerEvent =
       signedIndexEvent ||
       chunkResults.find((chunk) => chunk.success)?.event ||