mindspace: close authority boundaries

wechat/verify/page-artifact.mjs

@@ -8,6 +8,9 @@ export function isStubPublicHtmlContent(content) {
 }
 
 export function artifactFileExists(artifact) {
+  if (typeof artifact?.exists === 'boolean') {
+    return artifact.exists;
+  }
   const localPath = String(artifact?.localPath ?? '').trim();
   if (!localPath) return false;
   try {
@@ -18,6 +21,9 @@ export function artifactFileExists(artifact) {
 }
 
 export function isStubPublicHtmlArtifact(artifact) {
+  if (typeof artifact?.isStub === 'boolean') {
+    return artifact.isStub;
+  }
   const localPath = String(artifact?.localPath ?? '').trim();
   if (!localPath) return false;
   try {
@@ -44,6 +50,24 @@ export function verifyPageArtifactContent(artifact, { minBytes = 512 } = {}) {
   if (isStubPublicHtmlArtifact(artifact)) {
     return { ok: false, reason: 'stub_placeholder' };
   }
+  if (!String(artifact?.localPath ?? '').trim()) {
+    if (
+      Number(artifact?.sizeBytes ?? 0) <
+      minBytes
+    ) {
+      return {
+        ok: false,
+        reason: 'too_small',
+      };
+    }
+    if (artifact?.isHtmlDocument !== true) {
+      return {
+        ok: false,
+        reason: 'not_html_document',
+      };
+    }
+    return { ok: true, reason: null };
+  }
   const size = fs.statSync(artifact.localPath).size;
   if (size < minBytes) {
     return { ok: false, reason: 'too_small' };

wechat/verify/share-preview.mjs

@@ -61,6 +61,18 @@ export function verifyArtifactSharePreview(artifact) {
   if (!artifactFileExists(artifact)) {
     return { ok: false, reason: 'missing_file' };
   }
+  if (!String(artifact?.localPath ?? '').trim()) {
+    if (
+      typeof artifact?.sharePreview?.ok ===
+      'boolean'
+    ) {
+      return artifact.sharePreview;
+    }
+    return {
+      ok: false,
+      reason: 'missing_share_preview_evaluation',
+    };
+  }
   const content = fs.readFileSync(artifact.localPath, 'utf8');
   return verifySharePreviewMeta(content);
 }