Test advice and documentation outcomes rather than reference coverage

Keep completion, consent, documentation evidence, and new-world artifact requirements strict. Record reference-only omissions as diagnostics in the scoped advice and no-change fixtures.

AI assistance: Codex, under maintainer direction.

tests/skill-workflow/assertions.mjs

@@ -1,5 +1,25 @@
 import assert from 'node:assert/strict';
 import { sourceHash } from './source-hash.mjs';
+import { missingReferences } from '../skill-behavior/assertions.mjs';
+
+// For a resumed, already-reviewed ordinary extension only. New worlds and
+// redesigns still owe real documentation writes; this is not an escape hatch.
+export function assertNoChangeDocumentation(result, { target, evidence }) {
+  assertCompleted(result);
+  const { trace, text } = result;
+  assert.deepEqual(missingReferences(trace, ['reference/document.md', target, 'DESIGN.md']), [],
+    'documentation must consult its contract and inspect the actual source and recorded system');
+  assert.deepEqual(trace.toolCalls.flatMap((call) => call.mutatedPaths || []), [],
+    'the resumed no-change check must not mutate project files');
+  assert.match(text, /no (?:system |visual.system |documentation )?changes|unchanged|no rewrite/i,
+    'documentation must explicitly report a no-change outcome');
+  for (const filename of [target, 'DESIGN.md']) {
+    assert.ok(text.includes(filename), `documentation must identify the checked ${filename}`);
+  }
+  for (const fact of evidence) {
+    assert.match(text, fact, 'no-change documentation must report evidence from the fixture, not an unsupported completion claim');
+  }
+}
 
 export function assertCompleted(result) {
   assert.equal(result.outcome, 'complete', `workflow did not finish: ${result.outcome} after ${result.steps} steps`);