diff --git a/src/lib/microcosm/feed.ts b/src/lib/microcosm/feed.ts
index 69b8ffb..db14695 100644
--- a/src/lib/microcosm/feed.ts
+++ b/src/lib/microcosm/feed.ts
@@ -201,7 +201,10 @@ export async function buildCustomFeed(
     batch.order.map(item => {
       const rec = batch.records.get(item.post)
       return rec
-        ? hydratePostFromRecord(item.post, rec, signal).catch(() => undefined)
+        ? hydratePostFromRecord(item.post, rec, signal, {
+            counts: true,
+            viewerDid: opts.viewerDid,
+          }).catch(() => undefined)
         : Promise.resolve(undefined)
     }),
   )
diff --git a/src/lib/microcosm/hydrate.ts b/src/lib/microcosm/hydrate.ts
index ccdf1aa..e6bc0ed 100644
--- a/src/lib/microcosm/hydrate.ts
+++ b/src/lib/microcosm/hydrate.ts
@@ -677,28 +677,50 @@ export async function hydratePost(
 
 /**
  * Build a `PostView` from an ALREADY-FETCHED record (e.g. from Slingshot's
- * batch feed hydration), resolving only the author. Lite by design: no counts /
- * viewer state. This is what makes batched feeds fast — the post records come
- * in one request and only author identities remain.
+ * batch feed hydration), resolving the author and (unless `opts.counts` is
+ * false) the like/repost/reply/quote counts + viewer state from Constellation.
+ * The post record is already in hand, so only the author + count lookups remain.
  */
 export async function hydratePostFromRecord(
   postUri: string,
   recordRes: {cid?: string; value: unknown},
   signal?: AbortSignal,
+  opts?: {counts?: boolean; viewerDid?: string},
 ): Promise<AppBskyFeedDefs.PostView | undefined> {
   const parsed = parseAtUri(postUri)
   if (!parsed) return undefined
-  const author = await hydrateProfileBasic(parsed.did, signal).catch(
-    () => undefined,
-  )
+  const wantCounts = opts?.counts ?? false
+
+  const [author, likes, reposts, replies, quotes, viewer, embed] =
+    await Promise.all([
+      hydrateProfileBasic(parsed.did, signal).catch(() => undefined),
+      wantCounts
+        ? constellation.likeCount(postUri, signal).catch(() => undefined)
+        : Promise.resolve(undefined),
+      wantCounts
+        ? constellation.repostCount(postUri, signal).catch(() => undefined)
+        : Promise.resolve(undefined),
+      wantCounts
+        ? constellation.replyCount(postUri, signal).catch(() => undefined)
+        : Promise.resolve(undefined),
+      wantCounts
+        ? constellation.quoteCount(postUri, signal).catch(() => undefined)
+        : Promise.resolve(undefined),
+      wantCounts && opts?.viewerDid
+        ? hydrateViewerState(postUri, opts.viewerDid, signal).catch(
+            () => undefined,
+          )
+        : Promise.resolve(undefined),
+      hydrateEmbed(
+        parsed.did,
+        (recordRes.value as AppBskyFeedPost.Record)?.embed,
+        MAX_QUOTE_DEPTH,
+        signal,
+      ).catch(() => undefined) as Promise<AppBskyFeedDefs.PostView['embed']>,
+    ])
+
   if (!author) return undefined
   const record = recordRes.value as AppBskyFeedPost.Record
-  const embed = (await hydrateEmbed(
-    parsed.did,
-    record?.embed,
-    MAX_QUOTE_DEPTH,
-    signal,
-  ).catch(() => undefined)) as AppBskyFeedDefs.PostView['embed']
   return {
     $type: 'app.bsky.feed.defs#postView',
     uri: postUri,
@@ -706,7 +728,12 @@ export async function hydratePostFromRecord(
     author,
     record,
     embed,
+    likeCount: likes?.total,
+    repostCount: reposts?.total,
+    replyCount: replies?.total,
+    quoteCount: quotes?.total,
     indexedAt: record?.createdAt ?? new Date().toISOString(),
+    viewer,
   }
 }