feat: add .mdx file support

v0.6.3

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: christopherarter

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@dynamik-dev/refdocs",
-  "version": "0.6.2",
+  "version": "0.6.3",
   "type": "module",
   "description": "Local CLI tool that indexes markdown documentation and exposes fast fuzzy search with intelligent chunking",
   "main": "dist/index.js",

src/indexer.ts

@@ -17,7 +17,7 @@ export function findMarkdownFiles(dirs: string[], baseDir: string): string[] {
       const stat = statSync(fullPath);
       if (stat.isDirectory()) {
         walk(fullPath);
-      } else if (entry.endsWith(".md") || entry.endsWith(".txt")) {
+      } else if (entry.endsWith(".md") || entry.endsWith(".mdx") || entry.endsWith(".txt")) {
         files.push(relative(baseDir, fullPath));
       }
     }

tests/indexer.test.ts

@@ -42,14 +42,21 @@ describe("findMarkdownFiles", () => {
     expect(files).toContain("docs/sub/nested.md");
   });
 
-  it("ignores non-md/txt files but includes .txt", () => {
+  it("ignores non-md/mdx/txt files but includes .txt", () => {
     writeFileSync(join(tmpDir, "docs", "readme.md"), "# Hello");
     writeFileSync(join(tmpDir, "docs", "notes.txt"), "not markdown");
     writeFileSync(join(tmpDir, "docs", "data.json"), "{}");
     const files = findMarkdownFiles(["docs"], tmpDir);
     expect(files).toEqual(["docs/notes.txt", "docs/readme.md"]);
   });
 
+  it("finds .mdx files", () => {
+    writeFileSync(join(tmpDir, "docs", "readme.md"), "# Hello");
+    writeFileSync(join(tmpDir, "docs", "component.mdx"), "# Component\n\nSome MDX content.");
+    const files = findMarkdownFiles(["docs"], tmpDir);
+    expect(files).toEqual(["docs/component.mdx", "docs/readme.md"]);
+  });
+
   it("returns empty array for missing directory", () => {
     const files = findMarkdownFiles(["nonexistent"], tmpDir);
     expect(files).toEqual([]);