fix(#2765): bump brace-expansion to patched 1.1.18/5.0.9 (high-severity devDep advisory) (#2888)

* fix(#2765): bump brace-expansion to patched 1.1.18/5.0.9 (high-severity devDep advisory)

npm audit fix (non-breaking) bumps the lockfile: brace-expansion 1.1.15→1.1.18
(eslint-nested via minimatch@3.x) and 5.0.6→5.0.9 (stryker-nested). Both 1.1.18 and
5.0.9 were published 2026-07-30 as the patch backports for GHSA-3jxr-9vmj-r5cp /
GHSA-mh99-v99m-4gvg (range <=5.0.7). No overrides needed (in-range bump), no major
bumps, no --force. Production (npm audit --omit=dev) unaffected (devDep only).
Add a structural test pinning the installed versions so the bump can't silently regress.

* chore(#2765): changeset fragment

* fix(#2765): correct changeset issue ref + parse patch version as number (review findings)

- changeset cited #2762 (typo) — fix to (#2765).
- test compared v.split('.')[2] as a string (false-pass for 1.1.9) — parse all segments as Number.

* chore(#2765): backfill changeset PR number (2888)

---------

Co-authored-by: Test <test@example.com>

tests/issue-2765-brace-expansion-lockfile.test.cjs

@@ -0,0 +1,48 @@
+// allow-test-rule: structural-implementation-guard (#2765)
+'use strict';
+
+// Regression guard for #2765: the lockfile must pin the patched brace-expansion
+// versions (>=1.1.18 for the 1.x line, >=5.0.9 for the 5.x line) published 2026-07-30
+// to resolve the high-severity DoS/OOM advisories (GHSA-3jxr-9vmj-r5cp /
+// GHSA-mh99-v99m-4gvg, range <=5.0.7). This is a lockfile-only devDependency bump
+// (eslint/stryker → minimatch → brace-expansion); production (npm audit --omit=dev) is
+// unaffected. The test pins the installed versions so the bump can't silently regress.
+
+const { test } = require('node:test');
+const assert = require('node:assert/strict');
+const { execFileSync } = require('node:child_process');
+const path = require('node:path');
+
+const ROOT = path.join(__dirname, '..');
+
+function npmLs(pkg) {
+  // `npm ls <pkg> --json --all` lists every installed copy with its version. Collect
+  // the version of every node whose key is `pkg` (not the parent packages).
+  const out = execFileSync('npm', ['ls', pkg, '--json', '--all'], {
+    cwd: ROOT, encoding: 'utf8', shell: true, stdio: ['ignore', 'pipe', 'ignore'],
+  });
+  const versions = [];
+  const walk = (node) => {
+    if (!node || !node.dependencies) return;
+    for (const [k, v] of Object.entries(node.dependencies)) {
+      if (k === pkg && v && v.version) versions.push(v.version);
+      walk(v);
+    }
+  };
+  walk(JSON.parse(out));
+  return versions;
+}
+
+test('all installed brace-expansion copies are patched (>=1.1.18 / >=5.0.9) — #2765', () => {
+  const versions = npmLs('brace-expansion');
+  assert.ok(versions.length > 0, 'brace-expansion must be installed (devDependency) to guard');
+  for (const v of versions) {
+    const [maj, min, pat] = v.split('.').map(Number);
+    const ok = (maj === 1 && (min > 1 || (min === 1 && pat >= 18))) // 1.x >= 1.1.18
+      || (maj === 5 && (min > 0 || pat >= 9))                       // 5.x >= 5.0.9
+      || (maj > 5);                                                 // >5.x
+    assert.ok(ok,
+      `brace-expansion@${v} is within the vulnerable range (<=5.0.7) — lockfile regressed the #2765 patch bump. ` +
+      'Re-apply: npm audit fix (non-breaking) to bump to 1.1.18 / 5.0.9.');
+  }
+});