diff --git a/docs/guides/template-publishing.md b/docs/guides/template-publishing.md
index 4a7c8be..e2837a3 100644
--- a/docs/guides/template-publishing.md
+++ b/docs/guides/template-publishing.md
@@ -16,11 +16,12 @@ content/email-templates/<key>/   (consumer repo, reviewed via PR)
         ▼
    post-kit-publish
         │  compile every template (fail-fast)
-        │  upload template.html + metadata.json
+        │  upload template.html + metadata.json + manifest.json
         ▼
 Azure Blob Storage
    tenants/{tenant}/{environment}/templates/{key}/template.html
    tenants/{tenant}/{environment}/templates/{key}/metadata.json
+   tenants/{tenant}/{environment}/templates/{key}/manifest.json
         │
         ▼
    PostKit API (BlobTemplateStore) at send time
@@ -31,21 +32,27 @@ A copy-pasteable workflow implementing the CI step is in
 
 ## Blob layout
 
-The publisher writes, and the API reads, exactly two blobs per template:
+The publisher writes three blobs per template. The API send path reads only
+the first two:
 
 ```text
 tenants/{tenant}/{environment}/templates/{templateKey}/template.html
 tenants/{tenant}/{environment}/templates/{templateKey}/metadata.json
+tenants/{tenant}/{environment}/templates/{templateKey}/manifest.json
 ```
 
 `template.html` is uploaded as `text/html; charset=utf-8` and still contains
 the `{{variable}}` placeholders; `metadata.json` is uploaded as
 `application/json; charset=utf-8` and is the compiled metadata, which the API
-re-validates on load. Uploads overwrite whatever is already at those paths.
-
-The compile manifest (including the SHA-256 `contentHash`) is **not** stored as
-a blob. It is emitted as one JSON line per template on the publisher's stdout,
-which is where CI logs preserve it:
+re-validates on load. `manifest.json` is uploaded as
+`application/json; charset=utf-8` and holds the compile manifest
+(`contentHash`, `compiledAt`, `sourceCommit`, and related fields). It is
+operational metadata for provenance and change detection — `BlobTemplateStore`
+does not read it, and templates published before this blob existed still load
+and send unchanged. Uploads overwrite whatever is already at those paths.
+
+The publisher also emits one JSON line per template on stdout (unchanged for
+log-scraping compatibility):
 
 ```json
 {
diff --git a/packages/post-kit-publisher/src/publish.spec.ts b/packages/post-kit-publisher/src/publish.spec.ts
index ae3b653..3d3044f 100644
--- a/packages/post-kit-publisher/src/publish.spec.ts
+++ b/packages/post-kit-publisher/src/publish.spec.ts
@@ -107,54 +107,90 @@ describe('publishTemplates', () => {
     assert.equal(uploads, 0);
   });
 
-  it('uploads template.html and metadata.json for a valid fixture', async () => {
+  it('uploads template.html, metadata.json, and manifest.json for a valid fixture', async () => {
     const root = await mkdtemp(join(tmpdir(), 'post-kit-publish-'));
     await cp(join(FIXTURES, 'marketing.contact-us'), join(root, 'marketing.contact-us'), {
       recursive: true,
     });
 
-    const uploaded = new Map<string, string>();
-    const client = makeFakeClient((path, body) => {
-      uploaded.set(path, body);
+    const uploaded = new Map<string, UploadedBlob>();
+    const client = makeFakeClient((path, body, headers) => {
+      uploaded.set(path, { body, contentType: headers?.blobContentType });
     });
 
-    const result = await publishTemplatesWithClient(
-      {
-        templatesDir: root,
-        tenant: 'inkads',
-        environment: 'production',
-        storageAccount: 'ssdpostkitstprodae',
-        container: 'templates',
-        commit: 'abc123',
-      },
-      client,
-    );
-
-    assert.deepEqual(result.published, ['marketing.contact-us']);
-    assert.equal(result.failed.length, 0);
-    assert.ok(
-      uploaded.has('tenants/inkads/production/templates/marketing.contact-us/template.html'),
-    );
-    assert.ok(
-      uploaded.has('tenants/inkads/production/templates/marketing.contact-us/metadata.json'),
-    );
-    const meta = JSON.parse(
-      uploaded.get('tenants/inkads/production/templates/marketing.contact-us/metadata.json')!,
-    );
-    assert.equal(meta.key, 'marketing.contact-us');
-    const html = uploaded.get(
-      'tenants/inkads/production/templates/marketing.contact-us/template.html',
-    )!;
-    assert.ok(html.includes('<html') || html.includes('<!DOCTYPE') || html.length > 0);
+    const logs: string[] = [];
+    const originalLog = console.log;
+    console.log = (...args: unknown[]) => {
+      logs.push(args.map(String).join(' '));
+    };
+
+    try {
+      const result = await publishTemplatesWithClient(
+        {
+          templatesDir: root,
+          tenant: 'inkads',
+          environment: 'production',
+          storageAccount: 'ssdpostkitstprodae',
+          container: 'templates',
+          commit: 'abc123',
+        },
+        client,
+      );
+
+      assert.deepEqual(result.published, ['marketing.contact-us']);
+      assert.equal(result.failed.length, 0);
+
+      const base = 'tenants/inkads/production/templates/marketing.contact-us';
+      assert.ok(uploaded.has(`${base}/template.html`));
+      assert.ok(uploaded.has(`${base}/metadata.json`));
+      assert.ok(uploaded.has(`${base}/manifest.json`));
+
+      const meta = JSON.parse(uploaded.get(`${base}/metadata.json`)!.body);
+      assert.equal(meta.key, 'marketing.contact-us');
+
+      const manifest = JSON.parse(uploaded.get(`${base}/manifest.json`)!.body);
+      assert.equal(manifest.key, 'marketing.contact-us');
+      assert.equal(manifest.sourceCommit, 'abc123');
+      assert.ok(manifest.contentHash.length > 0);
+      assert.ok(manifest.compiledAt.length > 0);
+      assert.equal(
+        uploaded.get(`${base}/manifest.json`)!.contentType,
+        'application/json; charset=utf-8',
+      );
+
+      const html = uploaded.get(`${base}/template.html`)!.body;
+      assert.ok(html.includes('<html') || html.includes('<!DOCTYPE') || html.length > 0);
+
+      assert.equal(logs.length, 1);
+      const stdoutLine = JSON.parse(logs[0]!);
+      assert.equal(stdoutLine.key, 'marketing.contact-us');
+      assert.equal(stdoutLine.contentHash, manifest.contentHash);
+      assert.equal(stdoutLine.templateHtml, `${base}/template.html`);
+      assert.equal(stdoutLine.metadataJson, `${base}/metadata.json`);
+      assert.equal(Object.keys(stdoutLine).length, 4);
+    } finally {
+      console.log = originalLog;
+    }
   });
 });
 
-function makeFakeClient(onUpload: (path: string, body: string) => void): BlobServiceClient {
+interface UploadedBlob {
+  body: string;
+  contentType?: string;
+}
+
+function makeFakeClient(
+  onUpload: (path: string, body: string, headers?: { blobContentType?: string }) => void,
+): BlobServiceClient {
   const getBlockBlobClient = (blobPath: string): BlockBlobClient =>
     ({
-      upload: async (body: string | Buffer) => {
+      upload: async (
+        body: string | Buffer,
+        _length: number,
+        options?: { blobHTTPHeaders?: { blobContentType?: string } },
+      ) => {
         const text = typeof body === 'string' ? body : body.toString('utf8');
-        onUpload(blobPath, text);
+        onUpload(blobPath, text, options?.blobHTTPHeaders);
         return {};
       },
     }) as unknown as BlockBlobClient;
diff --git a/packages/post-kit-publisher/src/publish.ts b/packages/post-kit-publisher/src/publish.ts
index e718bf4..9c61da5 100644
--- a/packages/post-kit-publisher/src/publish.ts
+++ b/packages/post-kit-publisher/src/publish.ts
@@ -109,6 +109,7 @@ async function runPublish(
     const base = blobBasePath(options.tenant, options.environment, key);
     const htmlPath = `${base}/template.html`;
     const metaPath = `${base}/metadata.json`;
+    const manifestPath = `${base}/manifest.json`;
 
     await containerClient
       .getBlockBlobClient(htmlPath)
@@ -121,6 +122,12 @@ async function runPublish(
       .upload(metadataJson, Buffer.byteLength(metadataJson, 'utf8'), {
         blobHTTPHeaders: { blobContentType: 'application/json; charset=utf-8' },
       });
+    const manifestJson = JSON.stringify(entry.compiled.manifest, null, 2);
+    await containerClient
+      .getBlockBlobClient(manifestPath)
+      .upload(manifestJson, Buffer.byteLength(manifestJson, 'utf8'), {
+        blobHTTPHeaders: { blobContentType: 'application/json; charset=utf-8' },
+      });
 
     published.push(key);
     console.log(