diff --git a/.env.example b/.env.example
index f239b91..8dc4422 100644
--- a/.env.example
+++ b/.env.example
@@ -43,3 +43,7 @@ DATABASE_URL="file:./prisma/dev.db"
 # Recommended when exposing Siftly via a public URL (e.g. Cloudflare Tunnel).
 # SIFTLY_USERNAME=admin
 # SIFTLY_PASSWORD=your-passphrase-here
+
+# ── Import options ──────────────────────────────────────────────────
+# Automatically trigger AI categorization after a successful import.
+# AUTO_CATEGORIZE_AFTER_IMPORT=true
diff --git a/app/api/import/twitter/route.ts b/app/api/import/twitter/route.ts
index 3154484..9ce3f73 100644
--- a/app/api/import/twitter/route.ts
+++ b/app/api/import/twitter/route.ts
@@ -325,5 +325,16 @@ export async function POST(request: NextRequest): Promise<NextResponse> {
     )
   }
 
+  // Opt-in: trigger categorization in background after a successful import.
+  // Enable by setting AUTO_CATEGORIZE_AFTER_IMPORT=true in the environment.
+  if (imported > 0 && process.env.AUTO_CATEGORIZE_AFTER_IMPORT === 'true') {
+    const origin = request.nextUrl.origin
+    void fetch(`${origin}/api/categorize`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ force: false }),
+    }).catch(() => { /* best-effort */ })
+  }
+
   return NextResponse.json({ imported, skipped })
 }