diff --git a/smart-sources-v1/adapters/pdf.js b/smart-sources-v1/adapters/pdf.js
new file mode 100644
index 00000000..3be0926e
--- /dev/null
+++ b/smart-sources-v1/adapters/pdf.js
@@ -0,0 +1,24 @@
+import { SourceAdapter } from "./_adapter.js";
+
+export class SmartSourcesPdfAdapter extends SourceAdapter {
+  async _read() {
+    return await this.smart_source.fs.read(this.smart_source.data.path, 'base64');
+  }
+  async read() {
+    if(!this.data.content) {
+      const base64 = await this._read();
+      // PROBLEM: CANNOT USE PDF IN VISION API (2024-09-20)  
+    }
+    // Return content from data.content
+    return this.data.content;
+
+  }
+
+  update() {
+    throw new Error('not available for file type');
+  }
+
+  create() {
+    throw new Error('not available for file type');
+  }
+}
\ No newline at end of file
diff --git a/smart-sources/blocks/_block.js b/smart-sources/blocks/_block.js
new file mode 100644
index 00000000..e69de29b
diff --git a/smart-sources/blocks/markdown.js b/smart-sources/blocks/markdown.js
new file mode 100644
index 00000000..0e639ee5
--- /dev/null
+++ b/smart-sources/blocks/markdown.js
@@ -0,0 +1,4 @@
+export function parse_blocks(source) {
+  const {blocks, ...rest} = source.smart_chunks.parse(source);
+  source.collection.create_blocks(source, blocks);
+}
\ No newline at end of file
diff --git a/smart-sources/groups/_group.js b/smart-sources/groups/_group.js
new file mode 100644
index 00000000..e69de29b
diff --git a/smart-sources/groups/cluster.js b/smart-sources/groups/cluster.js
new file mode 100644
index 00000000..e69de29b
diff --git a/smart-sources/groups/directory.js b/smart-sources/groups/directory.js
new file mode 100644
index 00000000..e69de29b