chore: import upstream snapshot with attribution

tests/unit/no-memory-header.test.ts

@@ -0,0 +1,45 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+// PRD-2026-06-19: per-request opt-out of memory/skills injection via the
+// `x-omniroute-no-memory` header (mirrors `x-omniroute-no-cache`).
+const { isNoMemoryRequested, getHeaderValueCaseInsensitive } = await import(
+  "../../open-sse/handlers/chatCore/headers.ts"
+);
+
+test("isNoMemoryRequested is true for truthy header values (plain object)", () => {
+  for (const v of ["true", "1", "yes", "TRUE", "Yes", " true "]) {
+    assert.equal(
+      isNoMemoryRequested({ "x-omniroute-no-memory": v }),
+      true,
+      `expected true for ${JSON.stringify(v)}`
+    );
+  }
+});
+
+test("isNoMemoryRequested is case-insensitive on the header NAME", () => {
+  assert.equal(isNoMemoryRequested({ "X-OmniRoute-No-Memory": "true" }), true);
+});
+
+test("isNoMemoryRequested works with a Headers instance", () => {
+  const h = new Headers();
+  h.set("x-omniroute-no-memory", "1");
+  assert.equal(isNoMemoryRequested(h), true);
+});
+
+test("isNoMemoryRequested is false when the header is absent / empty / falsy", () => {
+  assert.equal(isNoMemoryRequested(null), false);
+  assert.equal(isNoMemoryRequested(undefined), false);
+  assert.equal(isNoMemoryRequested({}), false);
+  assert.equal(isNoMemoryRequested({ "x-omniroute-no-memory": "" }), false);
+  assert.equal(isNoMemoryRequested({ "x-omniroute-no-memory": "false" }), false);
+  assert.equal(isNoMemoryRequested({ "x-omniroute-no-memory": "0" }), false);
+  assert.equal(isNoMemoryRequested({ "x-omniroute-no-memory": "no" }), false);
+});
+
+test("getHeaderValueCaseInsensitive still resolves the header (sanity)", () => {
+  assert.equal(
+    getHeaderValueCaseInsensitive({ "x-omniroute-no-memory": "true" }, "x-omniroute-no-memory"),
+    "true"
+  );
+});