test: contract acceptance test missing from #187

The fixed line sits once on contract row 6c and in no product block sent to
the model (TASK-limitation-line brief, acceptance item 7).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DbBXoyn7Hj3LCW3BUs5bZ8

frontend/tests/consult-limitation-line-contract-1834.test.ts

@@ -0,0 +1,35 @@
+// #187 / BUG-1834 acceptance addition (Claude, 2026-11-09): brief item 7 was not in Grok's test file.
+// The fixed line is written once in the contract's section F 6c note, outside every product block, so no
+// text sent to the model contains it.
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import { CONSULT_VERIFICATION_LIMIT_LINE } from "../src/lib/consult-answer-basis.ts";
+import {
+  productContractBlockRaw,
+  productRuntimeContractSource,
+  type ProductContractBlock,
+} from "../src/lib/product-runtime-contract.ts";
+
+const BLOCKS: readonly ProductContractBlock[] = [
+  "runtime-contract",
+  "chat-method-boundaries",
+  "natal-instructions",
+  "mevg-blocked-policy",
+  "shared-reading",
+];
+
+test("the contract carries the line exactly once, on the 6c row", () => {
+  const source = productRuntimeContractSource();
+  assert.equal(source.split(CONSULT_VERIFICATION_LIMIT_LINE).length - 1, 1);
+  const row = source.split("\n").find((line) => line.includes(CONSULT_VERIFICATION_LIMIT_LINE)) ?? "";
+  assert.match(row, /^6c\. （BUG-1794，产品决定，偏离她的方法裁定）/);
+  assert.match(row, /产品负责人 2026-11-09 同意（BUG-1834）/);
+});
+
+test("no product block sent to the model contains the line", () => {
+  const source = productRuntimeContractSource();
+  for (const name of BLOCKS) {
+    assert.doesNotMatch(productContractBlockRaw(name, source), new RegExp(CONSULT_VERIFICATION_LIMIT_LINE), name);
+  }
+});