refactor: use conversations (#475)

Co-authored-by: Letta <noreply@letta.com>

src/agent/memory.ts

@@ -49,7 +49,7 @@ export function isProjectBlock(label: string): boolean {
 /**
  * Parse frontmatter and content from an .mdx file
  */
-function parseMdxFrontmatter(content: string): {
+export function parseMdxFrontmatter(content: string): {
   frontmatter: Record<string, string>;
   body: string;
 } {