Import AITURK IDE 1.0.0-beta.1 from Hermes 63279301; preserve MIT license

apps/desktop/scripts/perf/scenarios/stream-history.mjs

@@ -0,0 +1,18 @@
+// Streaming into an ALREADY-LONG transcript. Same measurement as `stream`, but
+// the history is mounted and allowed to settle before the recorders start, so
+// what it captures is the per-delta cost that scales with transcript length —
+// the regression reported in #69120.
+//
+// Report-only (tier: manual): the number depends on how much history the host
+// can mount, so it is not gated against the committed baseline.
+
+import stream from './stream.mjs'
+
+export default {
+  name: 'stream-history',
+  tier: 'manual',
+  description: 'Streaming cost with a long settled transcript already mounted.',
+  run(cdp, opts = {}) {
+    return stream.run(cdp, { ...opts, historyTurns: Number(opts.historyTurns ?? 200) })
+  }
+}