diff --git a/packages/backend/src/routes/editor.ts b/packages/backend/src/routes/editor.ts
index cb298e5..657773c 100644
--- a/packages/backend/src/routes/editor.ts
+++ b/packages/backend/src/routes/editor.ts
@@ -25,7 +25,8 @@ router.get("/tree/:repo", async (req, res) => {
 
 router.get("/file/:repo/*path", async (req, res) => {
   try {
-    const content = await readFile(req.params.repo, req.params.path);
+    const filePath = Array.isArray(req.params.path) ? req.params.path.join("/") : req.params.path;
+    const content = await readFile(req.params.repo, filePath);
     res.json({ content });
   } catch (err: unknown) {
     const message = err instanceof Error ? err.message : "Unknown error";
@@ -35,7 +36,8 @@ router.get("/file/:repo/*path", async (req, res) => {
 
 router.put("/file/:repo/*path", async (req, res) => {
   try {
-    await writeFile(req.params.repo, req.params.path, req.body.content);
+    const filePath = Array.isArray(req.params.path) ? req.params.path.join("/") : req.params.path;
+    await writeFile(req.params.repo, filePath, req.body.content);
     res.json({ ok: true });
   } catch (err: unknown) {
     const message = err instanceof Error ? err.message : "Unknown error";
@@ -45,7 +47,8 @@ router.put("/file/:repo/*path", async (req, res) => {
 
 router.delete("/file/:repo/*path", async (req, res) => {
   try {
-    await deleteFile(req.params.repo, req.params.path);
+    const filePath = Array.isArray(req.params.path) ? req.params.path.join("/") : req.params.path;
+    await deleteFile(req.params.repo, filePath);
     res.json({ ok: true });
   } catch (err: unknown) {
     const message = err instanceof Error ? err.message : "Unknown error";
diff --git a/packages/backend/src/routes/repos.ts b/packages/backend/src/routes/repos.ts
index 701fa52..e2aff93 100644
--- a/packages/backend/src/routes/repos.ts
+++ b/packages/backend/src/routes/repos.ts
@@ -143,7 +143,7 @@ router.get("/:repo/diff/*path", async (req, res) => {
       res.status(400).json({ error: `Unknown repo: ${repoName}` });
       return;
     }
-    const filePath = req.params.path;
+    const filePath = Array.isArray(req.params.path) ? req.params.path.join("/") : req.params.path;
     const repoPath = getRepoPath(repoName);
     const diff = await getDiff(repoPath, filePath);
     res.json({ diff });
diff --git a/packages/backend/src/services/git.service.ts b/packages/backend/src/services/git.service.ts
index c6acebf..849acad 100644
--- a/packages/backend/src/services/git.service.ts
+++ b/packages/backend/src/services/git.service.ts
@@ -1,4 +1,4 @@
-import simpleGit, { SimpleGit } from "simple-git";
+import { simpleGit, SimpleGit } from "simple-git";
 import fs from "fs/promises";
 import { REPOS, GIT_PROVIDER_URL, type RepoName } from "../config/repos.js";
 import { getRepoPath, readConfig } from "./workspace.service.js";