diff --git a/skills/analysis/home-security-benchmark/scripts/generate-report.cjs b/skills/analysis/home-security-benchmark/scripts/generate-report.cjs
index d5dda66d..9bddd296 100644
--- a/skills/analysis/home-security-benchmark/scripts/generate-report.cjs
+++ b/skills/analysis/home-security-benchmark/scripts/generate-report.cjs
@@ -109,6 +109,7 @@ function buildHTML(allResults, fixtureImages, { liveMode = false, liveStatus = n
         tokens: r.tokens || r.data?.tokenTotals?.total,
         perfSummary: r.perfSummary || r.data?.perfSummary || null,
         system: r.data?.system || {},
+        serverParams: r.data?.serverParams || {},
         tokenTotals: r.data?.tokenTotals || {},
         suites: (r.data?.suites || []).map(s => ({
             name: s.name,
@@ -492,6 +493,15 @@ function renderPerformance() {
     let html = '<div class="header"><div class="page-title">⚡ Performance</div>';
     html += '<div class="page-subtitle">' + esc(run.model || '?') + ' — ' + shortDate(run.timestamp) + '</div></div>';
 
+    if (run.serverParams && typeof run.serverParams === 'object' && Object.keys(run.serverParams).length > 0) {
+        let paramStr = '';
+        for (const k in run.serverParams) {
+            if (paramStr) paramStr += ' | ';
+            paramStr += '<b>' + esc(k) + '</b>: ' + esc(String(run.serverParams[k]));
+        }
+        html += '<div style="font-size:0.75rem; color:var(--text-dim); margin-left: 2rem; margin-top: 0.5rem; padding-bottom: 0.5rem;">[Server Params]  ' + paramStr + '</div>';
+    }
+
     // Hero cards
     html += '<div class="hero-grid">';
     const ttftAvg = perf?.ttft?.avgMs;
diff --git a/skills/analysis/home-security-benchmark/scripts/run-benchmark.cjs b/skills/analysis/home-security-benchmark/scripts/run-benchmark.cjs
index bf7969d8..e6f3b0b0 100644
--- a/skills/analysis/home-security-benchmark/scripts/run-benchmark.cjs
+++ b/skills/analysis/home-security-benchmark/scripts/run-benchmark.cjs
@@ -230,10 +230,14 @@ function suite(name, fn) {
     suites.push({ name, fn, tests: [] });
 }
 
+let targetServerParams = {};
+try { targetServerParams = JSON.parse(process.env.AEGIS_SERVER_PARAMS || '{}'); } catch { }
+
 const results = {
     timestamp: new Date().toISOString(),
     gateway: GATEWAY_URL,
     vlm: VLM_URL || null,
+    serverParams: targetServerParams,
     system: {},
     model: {},
     suites: [],
@@ -333,6 +337,9 @@ async function llmCall(messages, opts = {}) {
         ...(model && { model }),
         ...(temperature !== undefined && { temperature }),
         ...(opts.expectJSON && { top_p: 0.8 }),
+        // For JSON-expected tests on local servers, enable server-side JSON mode
+        // which activates prefix buffering to strip hallucinated artifacts
+        ...(opts.expectJSON && !isCloudApi && { response_format: { type: 'json_object' } }),
         ...(opts.tools && { tools: opts.tools }),
         // Model-family-specific params (e.g. reasoning_effort:'none' for Mistral).
         // These are merged last so they take precedence over defaults.