diff --git a/docs-sources.yml b/docs-sources.yml
index 65e0228..c37cfe8 100644
--- a/docs-sources.yml
+++ b/docs-sources.yml
@@ -12,7 +12,7 @@ sources:
     ref: main
     path: happyview-modules/CHANGELOG.md
     trackRelease: true
-    releaseTagPrefix: '@hypercerts-org/hypercerts-api@'
+    releaseTagPrefix: '@hypercerts-org/happyview-modules@'
 
   - id: cgs-changelog
     title: Certified Group Service changelog
diff --git a/lib/external-docs-snapshot.js b/lib/external-docs-snapshot.js
index 9fdba44..0f27a48 100644
--- a/lib/external-docs-snapshot.js
+++ b/lib/external-docs-snapshot.js
@@ -107,15 +107,10 @@ async function fetchSourceUpdatedAt(source, token) {
 
 /** Read a published stable GitHub release, never a package.json development version. */
 async function fetchLatestRelease(source, token) {
-  const url = `https://api.github.com/repos/${source.repo}/releases/latest`;
-  const response = await fetch(url, {
-    headers: getGitHubHeaders(token, 'application/vnd.github+json', 'hypercerts-docs-build'),
-    cache: 'no-store',
-  });
-  // No published release is a supported state. The Markdown fetch separately verifies repository access.
-  if (response.status === 404) return null;
-  if (!response.ok) throw new Error(`Release metadata for ${source.id} returned ${response.status}. Refusing to label a failed lookup as unreleased. Set DOCS_SOURCE_TOKEN or run gh auth login locally.`);
-  const release = await response.json();
+  const release = source.releaseTagPrefix
+    ? await fetchLatestPrefixedRelease(source, token)
+    : await fetchRepositoryLatestRelease(source, token);
+  if (!release) return null;
   const tag = release.tag_name || '';
   let versionTag = tag;
   if (source.releaseTagPrefix) {
@@ -136,6 +131,34 @@ async function fetchLatestRelease(source, token) {
   };
 }
 
+async function fetchReleaseMetadata(url, source, token) {
+  const response = await fetch(url, {
+    headers: getGitHubHeaders(token, 'application/vnd.github+json', 'hypercerts-docs-build'),
+    cache: 'no-store',
+  });
+  // No published release is a supported state. The Markdown fetch separately verifies repository access.
+  if (response.status === 404) return null;
+  if (!response.ok) throw new Error(`Release metadata for ${source.id} returned ${response.status}. Refusing to label a failed lookup as unreleased. Set DOCS_SOURCE_TOKEN or run gh auth login locally.`);
+  return response.json();
+}
+
+/** The repository's "latest" release, for repositories that release one package. */
+function fetchRepositoryLatestRelease(source, token) {
+  return fetchReleaseMetadata(`https://api.github.com/repos/${source.repo}/releases/latest`, source, token);
+}
+
+/**
+ * The newest stable release tagged with the source's prefix. A repository that releases
+ * several packages has one "latest" release for all of them, so it cannot be used.
+ */
+async function fetchLatestPrefixedRelease(source, token) {
+  const releases = await fetchReleaseMetadata(`https://api.github.com/repos/${source.repo}/releases?per_page=100`, source, token);
+  if (!releases || releases.length === 0) return null;
+  const release = releases.find(item => !item.draft && !item.prerelease && (item.tag_name || '').startsWith(source.releaseTagPrefix));
+  if (!release) throw new Error(`No stable release of ${source.id} is tagged "${source.releaseTagPrefix}<major>.<minor>.<patch>" among the latest ${releases.length} releases of ${source.repo}. Check releaseTagPrefix.`);
+  return release;
+}
+
 /**
  * Fetch one immutable Markdown snapshot used by rendering, search, raw exports, and fingerprinting.
  */
diff --git a/test/external-docs-snapshot.test.js b/test/external-docs-snapshot.test.js
index b5a73fe..bee57cd 100644
--- a/test/external-docs-snapshot.test.js
+++ b/test/external-docs-snapshot.test.js
@@ -129,7 +129,7 @@ test('published stable release metadata is captured in the build snapshot', asyn
   assert.equal(snapshot.release.url, 'https://github.com/hypercerts-org/ePDS/releases/tag/v1.4.12');
 });
 
-test('tracks the API release behind its scoped package tag and rejects another package prefix', async context => {
+test('tracks the API release behind its scoped package tag among the repository\'s other packages', async context => {
   const originalFetch = global.fetch;
   context.after(() => { global.fetch = originalFetch; });
   const apiSource = {
@@ -137,25 +137,31 @@ test('tracks the API release behind its scoped package tag and rejects another p
     title: 'Hypercerts API changelog',
     repo: 'hypercerts-org/api',
     ref: 'main',
-    path: 'api/CHANGELOG.md',
+    path: 'happyview-modules/CHANGELOG.md',
     trackRelease: true,
-    releaseTagPrefix: '@hypercerts-org/hypercerts-api@',
+    releaseTagPrefix: '@hypercerts-org/happyview-modules@',
   };
-  const snapshotForTag = tag => {
-    global.fetch = async url => String(url).endsWith('/releases/latest')
-      ? response({ json: { tag_name: tag, published_at: '2026-10-06T16:12:16Z', draft: false, prerelease: false } })
-      : String(url).includes('/commits?') ? response({ json: [] }) : response({ text: '# @hypercerts-org/hypercerts-api\n\n## 0.1.0' });
+  const release = (tag, extra = {}) => ({ tag_name: tag, published_at: '2026-11-03T09:22:45Z', draft: false, prerelease: false, ...extra });
+  const snapshotFor = releases => {
+    global.fetch = async url => String(url).includes('/releases?')
+      ? response({ json: releases })
+      : String(url).includes('/commits?') ? response({ json: [] }) : response({ text: '# @hypercerts-org/happyview-modules\n\n## 0.3.0' });
     return collectSourceSnapshot(apiSource);
   };
 
-  const snapshot = await snapshotForTag('@hypercerts-org/hypercerts-api@0.1.0');
-  assert.equal(snapshot.release.version, '0.1.0');
-  assert.equal(snapshot.release.url, 'https://github.com/hypercerts-org/api/releases/tag/%40hypercerts-org%2Fhypercerts-api%400.1.0');
-  assert.equal(snapshot.path, 'api/CHANGELOG.md');
-  await assert.rejects(
-    () => snapshotForTag('@hypercerts-org/another-package@0.1.0'),
-    /stable semantic release tag/,
-  );
+  // The repository's newest release belongs to another package; the API's is found by its prefix.
+  const snapshot = await snapshotFor([
+    release('@hypercerts-org/api@0.1.0'),
+    release('@hypercerts-org/happyview-modules@0.4.0-beta.1', { prerelease: true }),
+    release('@hypercerts-org/happyview-modules@0.3.0'),
+    release('@hypercerts-org/hypercerts-api@0.2.0'),
+  ]);
+  assert.equal(snapshot.release.version, '0.3.0');
+  assert.equal(snapshot.release.url, 'https://github.com/hypercerts-org/api/releases/tag/%40hypercerts-org%2Fhappyview-modules%400.3.0');
+  assert.equal(snapshot.path, 'happyview-modules/CHANGELOG.md');
+  assert.equal(await snapshotFor([]).then(item => item.release), null);
+  await assert.rejects(() => snapshotFor([release('@hypercerts-org/api@0.1.0')]), /No stable release of api-changelog/);
+  await assert.rejects(() => snapshotFor([release('@hypercerts-org/happyview-modules@0.3')]), /stable semantic release tag/);
 });
 
 test('an accessible repository without a GitHub release is explicitly unreleased', async context => {
diff --git a/test/external-docs.test.js b/test/external-docs.test.js
index 1a46866..cd9fd3f 100644
--- a/test/external-docs.test.js
+++ b/test/external-docs.test.js
@@ -205,7 +205,7 @@ test('configures API releases from the package changelog and scoped tag', () =>
     ref: 'main',
     path: 'happyview-modules/CHANGELOG.md',
     trackRelease: true,
-    releaseTagPrefix: '@hypercerts-org/hypercerts-api@',
+    releaseTagPrefix: '@hypercerts-org/happyview-modules@',
   });
 
   const pagePath = join(__dirname, '..', 'pages', 'releases', 'api.md');
diff --git a/test/releases.test.js b/test/releases.test.js
index 4c5cdb5..8fab52b 100644
--- a/test/releases.test.js
+++ b/test/releases.test.js
@@ -13,7 +13,7 @@ function sources() {
     ref: 'main',
     path: component.id === 'api' ? 'happyview-modules/CHANGELOG.md' : 'CHANGELOG.md',
     trackRelease: true,
-    ...(component.id === 'api' ? { releaseTagPrefix: '@hypercerts-org/hypercerts-api@' } : {}),
+    ...(component.id === 'api' ? { releaseTagPrefix: '@hypercerts-org/happyview-modules@' } : {}),
     release: component.id === 'relay' ? null : {
       version: component.id === 'lexicons' ? '2.0.0' : component.id === 'api' ? '0.1.0' : '0.6.0',
       url: component.id === 'api'