fix: round 5 of the release review of 6.3.0, the structural fix

Round 5 (v6.2.0..d37e538, WARN: 11 MAJOR, 2 MINOR). The patching did not
converge (the same two places every round), so the operator chose a
structural fix on 2026-10-11. Each change behind a test that failed first.

- A check runs with no shell. criteria-runner's runCommand starts the runner
  with the very words the screen checked (spawnSync(words[0], words.slice(1)),
  without NODE_TEST_CONTEXT); Phase 7 criteria, Regression: (its exec copy is
  gone, MINOR 0e98d5c7), proof of red, the done line and the test lock all
  run through it. No quote, glob, tilde or variable can rewrite a checked
  word any more. The screen stays and says why: a word that means something
  else in a shell (quote, backslash, $, brace, leading ~) is refused; a glob
  reaches only node --test, which expands its own patterns (sh read
  `tests/.?/` as `tests/../`); no path climbs out with .. or starts at /;
  a word starting with @ is refused (pytest reads @file as more arguments).
- The K6 plan-file sweep has v6.2.0's own Files: reader again (516dffa):
  backticked paths, and plain words only in a field without them. The
  shared reader from round 3 planned directories a description named and
  dropped paths v6.2.0 planned. fieldPaths stays for the tests-only check,
  with a path test on spans (`parse()`, `p.parse()` are no paths), plain
  descriptions ignored when the field has backticked paths, dotfiles,
  backslash paths and glued spans read.
- Skill frontmatter reads a value as YAML does: trailing space is nothing,
  and a comment ends a plain value, a flow list or a block indicator
  (`model: opus # pinned`). A comment that cuts a plain description, or is
  the whole value, is still a hazard.
- release-check reads the diff with --no-renames: a test moved into an
  allowed place after the review shows as removed.
- The example plan's step 2 heading no longer says "must FAIL initially";
  steps 1-2 keep the tests-only warning (operator 2026-10-09, 73262b6).

Open: MINOR c1fef1ad (one shared isMain helper) is not in this round.
Measured: 0 of 463 Files: fields with backticked paths (520 fields in 182
plans across the marketplace repos) carry another path-like word.

Suite 2185 (2183/0/2).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/scripts/release-check.test.mjs

@@ -435,3 +435,17 @@ test('release-check r4 — other text on the badge line is not release bookkeepi
     assert.match(r.stdout, /README\.md/);
   } finally { fx.cleanup(); }
 });
+
+// ==== round 5 of the release review of 6.3.0 (2026-10-11) ====================
+
+test('release-check r5 — a test moved into an allowed place after the review is still a removal → 1', () => {
+  const fx = fixture({ files: { 'guard.test.mjs': 'export const guarded = true;\n' } });
+  try {
+    mkdirSync(join(fx.repo, '.claude', 'voyage'), { recursive: true });
+    git(fx.repo, 'mv', 'guard.test.mjs', '.claude/voyage/guard.test.mjs');
+    git(fx.repo, 'commit', '-q', '-m', 'move the test out of the suite');
+    const r = run(fx);
+    assert.equal(r.status, 1, r.stdout + r.stderr);
+    assert.match(r.stdout, /guard\.test\.mjs/);
+  } finally { fx.cleanup(); }
+});