Docs: Update benchmark for anthropic/claude-opus-4.7 EFF:medium

tests/4_hexchain_pipeline/outputs/anthropic_claude-opus-4.7 EFF_medium.js

@@ -0,0 +1,58 @@
+const hexchain = async toml => {
+    const CDN = 'https://esm.sh/';
+    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();
+    const validate = ajv.compile(schema);
+    if (!validate(config)) return {valid: false, errors: ajv.errorsText(validate.errors)};
+
+    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 tableStr = table([
+        ['Stat', 'Value'],
+        ['mean', String(mean)],
+        ['stddev', String(stddev)],
+        ['median', String(median)]
+    ]);
+    const sanitized = DOMPurify.sanitize(`<pre class="stats">${tableStr}</pre>`);
+
+    return {
+        valid: true,
+        label: config.label,
+        stats: {mean, stddev, median},
+        table: sanitized,
+        count: config.count
+    };
+};
+export default hexchain;
+// Generation time: 8.530s
+// Result: PASS