docs(website): broaden stack-fit examples beyond promptfoo

Author: PredictabilityAtScale

website/index.html

@@ -140,12 +140,12 @@ <h3>One structured asset ships with the app</h3>
           <h3>PromptOpsKit owns the repo-native prompt layer, not the whole stack</h3>
           <div class="stack-fit-grid">
             <div>
-              <strong>Promptfoo</strong>
-              <p>Use it for evals, CI checks, and security testing.</p>
+              <strong>Evaluation & red-team tools</strong>
+              <p>Use Promptfoo, DeepEval, Giskard, or Garak for regressions, CI checks, and adversarial testing.</p>
             </div>
             <div>
-              <strong>Langfuse</strong>
-              <p>Use it for tracing and observability around live traffic.</p>
+              <strong>Tracing & observability tools</strong>
+              <p>Use Langfuse or Arize Phoenix to inspect live behavior, latency, and token usage.</p>
             </div>
             <div>
               <strong>Your SDK or HTTP layer</strong>