diff --git a/src/components/FileBrowser.tsx b/src/components/FileBrowser.tsx
index 836516ec..4896917f 100644
--- a/src/components/FileBrowser.tsx
+++ b/src/components/FileBrowser.tsx
@@ -151,12 +151,12 @@ interface FileBrowserProps {
 /** Placeholder hunkId for FileBrowser comments — there's no jj diff hunk to anchor to. */
 const FILE_BROWSER_COMMENT_HUNK_ID = "browser";
 
-// Filter out .git and .treq files/directories (but keep .github, .gitignore, etc.)
+// Hidden files can contain useful project configuration, but hidden directories
+// are implementation details that should not appear in the code tree.
 function filterHiddenEntries(entries: DirectoryEntry[]): DirectoryEntry[] {
-  return entries.filter((entry) => {
-    const { name } = entry;
-    return name !== ".git" && name !== ".treq";
-  });
+  return entries.filter(
+    (entry) => !entry.is_directory || !entry.name.startsWith("."),
+  );
 }
 
 // Virtualization constants
diff --git a/test/integration/code/filebrowser.test.tsx b/test/integration/code/filebrowser.test.tsx
index c73a11c0..212a07ad 100644
--- a/test/integration/code/filebrowser.test.tsx
+++ b/test/integration/code/filebrowser.test.tsx
@@ -95,6 +95,25 @@ describe("Dashboard - FileBrowser integration", () => {
     await screen.findByRole("button", { name: /back/i });
   });
 
+  it("hides hidden directories from the directory tree", async () => {
+    await setupWorkspace("feat/filebrowser-hidden-directories-test", {
+      "app.ts": "export const app = true;\n",
+      ".secret/config.json": "{}\n",
+      ".env": "VISIBLE_FILE=true\n",
+    });
+
+    const fileBrowser = await openWorkspaceCodeBrowser(
+      user,
+      "feat/filebrowser-hidden-directories-test",
+      "app.ts",
+    );
+
+    expect(fileBrowser.queryByText(".jj")).toBeNull();
+    expect(fileBrowser.queryByText(".git")).toBeNull();
+    expect(fileBrowser.queryByText(".secret")).toBeNull();
+    expect(fileBrowser.getByText(".env")).toBeTruthy();
+  });
+
   it("reloads the open file and directory tree after a scoped filesystem refresh", async () => {
     const { workspace, workspacePath } = await setupWorkspace(
       "feat/filebrowser-refresh-test",