Docs: Update benchmark for anthropic/claude-opus-4.8 EFF:medium

tests/4_hexchain_pipeline/outputs/anthropic_claude-opus-4.8 EFF_medium.js

@@ -0,0 +1,67 @@
+const CDN = "https://esm.sh/";
+
+const hexchain = async (toml) => {
+  const [
+    { parse },
+    { default: seedrandom },
+    ss,
+    { default: Ajv },
+    { default: table },
+    { default: DOMPurify }
+  ] = await Promise.all([
+    import(`${CDN}smol-toml`),
+    import(`${CDN}seedrandom`),
+    import(`${CDN}simple-statistics`),
+    import(`${CDN}ajv`),
+    import(`${CDN}text-table`),
+    import(`${CDN}dompurify`)
+  ]);
+
+  const config = parse(toml);
+
+  const schema = {
+    type: "object",
+    required: ["seed", "count", "label"],
+    properties: {
+      seed: { type: "string" },
+      count: { type: "integer", minimum: 1, maximum: 10000 },
+      label: { type: "string", minLength: 1 }
+    }
+  };
+
+  const ajv = new Ajv();
+  if (!ajv.validate(schema, config))
+    return { valid: false, errors: ajv.errorsText() };
+
+  const rng = new seedrandom(config.seed);
+  const nums = Array.from({ length: config.count }, () => rng());
+
+  const r = (n) => Math.round(n * 1e6) / 1e6;
+  const mean = r(ss.mean(nums));
+  const stddev = r(ss.standardDeviation(nums));
+  const median = r(ss.median(nums));
+
+  const tableString = table([
+    ["Stat", "Value"],
+    ["mean", String(mean)],
+    ["stddev", String(stddev)],
+    ["median", String(median)]
+  ]);
+
+  const sanitized = DOMPurify.sanitize(
+    `<pre class="stats">${tableString}</pre>`
+  );
+
+  return {
+    valid: true,
+    label: config.label,
+    stats: { mean, stddev, median },
+    table: sanitized,
+    count: config.count
+  };
+};
+
+export { hexchain };
+export default hexchain;
+// Generation time: 8.247s
+// Result: PASS