diff --git a/src/handlers/file.rs b/src/handlers/file.rs
index ab4a68e..f8e3b15 100644
--- a/src/handlers/file.rs
+++ b/src/handlers/file.rs
@@ -29,10 +29,9 @@ use crate::services::FileService;
 
 /// Returns a file's content.
 #[utoipa::path(
-    get, path = "/v1/playbooks/{id}/files/{reference}/{path}",
+    get, path = "/v1/playbooks/{id}/files/{path}",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     responses(
@@ -45,17 +44,16 @@ use crate::services::FileService;
 )]
 pub async fn get(
     State(ctx): State<Arc<Context>>,
-    Path((id, reference, path)): Path<(Uuid, String, String)>,
+    Path((id, path)): Path<(Uuid, String)>,
 ) -> Result<impl IntoResponse> {
-    Ok(Json(FileService::get(ctx, id, reference, path).await?))
+    Ok(Json(FileService::get(ctx, id, path).await?))
 }
 
 /// Create a file
 #[utoipa::path(
-    post, path = "/v1/playbooks/{id}/files/{reference}/{path}",
+    post, path = "/v1/playbooks/{id}/files/{path}",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     request_body(
@@ -74,20 +72,18 @@ pub async fn create(
     State(ctx): State<Arc<Context>>,
 
     Path(id): Path<Uuid>,
-    Path(reference): Path<String>,
     Path(path): Path<String>,
 
     Json(req): Json<FileRequest>,
 ) -> Result<impl IntoResponse> {
-    Ok((StatusCode::CREATED, Json(FileService::create(ctx, id, reference, path, req.content).await?)))
+    Ok((StatusCode::CREATED, Json(FileService::create(ctx, id, path, req.content).await?)))
 }
 
 /// Update a file
 #[utoipa::path(
-    put, path = "/v1/playbooks/{id}/files/{reference}/{path}",
+    put, path = "/v1/playbooks/{id}/files/{path}",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag. Default: default branch."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     request_body(
@@ -107,20 +103,18 @@ pub async fn update(
     State(ctx): State<Arc<Context>>,
 
     Path(id): Path<Uuid>,
-    Path(reference): Path<String>,
     Path(path): Path<String>,
 
     Json(req): Json<FileRequest>,
 ) -> Result<impl IntoResponse> {
-    Ok(Json(FileService::update(ctx, id, reference, path, req.content).await?))
+    Ok(Json(FileService::update(ctx, id, path, req.content).await?))
 }
 
 /// Delete a file
 #[utoipa::path(
-    delete, path = "/v1/playbooks/{id}/files/{reference}/{path}",
+    delete, path = "/v1/playbooks/{id}/files/{path}",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     responses(
@@ -135,20 +129,18 @@ pub async fn delete(
     State(ctx): State<Arc<Context>>,
 
     Path(id): Path<Uuid>,
-    Path(reference): Path<String>,
     Path(path): Path<String>,
 ) -> Result<impl IntoResponse> {
-    FileService::delete(ctx, id, reference, path).await?;
+    FileService::delete(ctx, id, path).await?;
 
     Ok(StatusCode::NO_CONTENT)
 }
 
 /// Copy a file
 #[utoipa::path(
-    post, path = "/v1/playbooks/{id}/files/{reference}/{path}/actions/copy",
+    post, path = "/v1/playbooks/{id}/files/{path}/actions/copy",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag. Default: default branch."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     request_body(
@@ -168,20 +160,18 @@ pub async fn copy(
     State(ctx): State<Arc<Context>>,
 
     Path(id): Path<Uuid>,
-    Path(reference): Path<String>,
     Path(path): Path<String>,
 
     Json(req): Json<DestinationRequest>,
 ) -> Result<impl IntoResponse> {
-    Ok(Json(FileService::copy(ctx, id, reference, path, req.destination).await?))
+    Ok(Json(FileService::copy(ctx, id, path, req.destination).await?))
 }
 
 /// Move a file
 #[utoipa::path(
-    post, path = "/v1/playbooks/{id}/files/{reference}/{path}/actions/move",
+    post, path = "/v1/playbooks/{id}/files/{path}/actions/move",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag. Default: default branch."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     request_body(
@@ -201,10 +191,9 @@ pub async fn rename(
     State(ctx): State<Arc<Context>>,
 
     Path(id): Path<Uuid>,
-    Path(reference): Path<String>,
     Path(path): Path<String>,
 
     Json(req): Json<DestinationRequest>,
 ) -> Result<impl IntoResponse> {
-    Ok(Json(FileService::rename(ctx, id, reference, path, req.destination).await?))
+    Ok(Json(FileService::rename(ctx, id, path, req.destination).await?))
 }
diff --git a/src/handlers/folder.rs b/src/handlers/folder.rs
index 5126894..1fd3dc5 100644
--- a/src/handlers/folder.rs
+++ b/src/handlers/folder.rs
@@ -30,10 +30,9 @@ use crate::services::FolderService;
 
 /// Gets the file list of a directory in a repository.
 #[utoipa::path(
-    get, path = "/v1/playbooks/{id}/folders/{reference}/{path}",
+    get, path = "/v1/playbooks/{id}/folders/{path}",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     responses(
@@ -46,9 +45,9 @@ use crate::services::FolderService;
 )]
 pub async fn get(
     State(ctx): State<Arc<Context>>,
-    Path((id, reference, path)): Path<(Uuid, String, Option<String>)>,
+    Path((id, path)): Path<(Uuid, Option<String>)>,
 ) -> Result<impl IntoResponse> {
-    Ok(Json(FolderService::get(ctx, id, reference, path).await?))
+    Ok(Json(FolderService::get(ctx, id, path).await?))
 }
 
 /// Returns a folder's tree.
@@ -76,10 +75,9 @@ pub async fn tree(
 
 /// Create a folder
 #[utoipa::path(
-    post, path = "/v1/playbooks/{id}/folders/{reference}/{path}",
+    post, path = "/v1/playbooks/{id}/folders/{path}",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     responses(
@@ -93,18 +91,16 @@ pub async fn create(
     State(ctx): State<Arc<Context>>,
 
     Path(id): Path<Uuid>,
-    Path(reference): Path<String>,
     Path(path): Path<String>,
 ) -> Result<impl IntoResponse> {
-    Ok((StatusCode::CREATED, Json(FolderService::create(ctx, id, reference, path).await?)))
+    Ok((StatusCode::CREATED, Json(FolderService::create(ctx, id, path).await?)))
 }
 
 /// Delete a folder
 #[utoipa::path(
-    delete, path = "/v1/playbooks/{id}/folders/{reference}/{path}",
+    delete, path = "/v1/playbooks/{id}/folders/{path}",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     responses(
@@ -119,20 +115,18 @@ pub async fn delete(
     State(ctx): State<Arc<Context>>,
 
     Path(id): Path<Uuid>,
-    Path(reference): Path<String>,
     Path(path): Path<String>,
 ) -> Result<impl IntoResponse> {
-    FolderService::delete(ctx, id, reference, path).await?;
+    FolderService::delete(ctx, id, path).await?;
 
     Ok(StatusCode::NO_CONTENT)
 }
 
 /// Copy a folder
 #[utoipa::path(
-    post, path = "/v1/playbooks/{id}/folders/{reference}/{path}/actions/copy",
+    post, path = "/v1/playbooks/{id}/folders/{path}/actions/copy",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag. Default: default branch."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     request_body(
@@ -152,20 +146,18 @@ pub async fn copy(
     State(ctx): State<Arc<Context>>,
 
     Path(id): Path<Uuid>,
-    Path(reference): Path<String>,
     Path(path): Path<String>,
 
     Json(req): Json<DestinationRequest>,
 ) -> Result<impl IntoResponse> {
-    Ok(Json(FolderService::copy(ctx, id, reference, path, req.destination).await?))
+    Ok(Json(FolderService::copy(ctx, id, path, req.destination).await?))
 }
 
 /// Move a folder
 #[utoipa::path(
-    post, path = "/v1/playbooks/{id}/folders/{reference}/{path}/actions/move",
+    post, path = "/v1/playbooks/{id}/folders/{path}/actions/move",
     params(
         ("id" = Uuid, description = "The id of playbook"),
-        ("reference" = String, description = "The name of the commit/branch/tag. Default: default branch."),
         ("path" = String, description = "The file path relative to the root of the repository."),
     ),
     request_body(
@@ -185,10 +177,9 @@ pub async fn rename(
     State(ctx): State<Arc<Context>>,
 
     Path(id): Path<Uuid>,
-    Path(reference): Path<String>,
     Path(path): Path<String>,
 
     Json(req): Json<DestinationRequest>,
 ) -> Result<impl IntoResponse> {
-    Ok(Json(FolderService::rename(ctx, id, reference, path, req.destination).await?))
+    Ok(Json(FolderService::rename(ctx, id, path, req.destination).await?))
 }
diff --git a/src/routes.rs b/src/routes.rs
index dc1441d..2fd1760 100644
--- a/src/routes.rs
+++ b/src/routes.rs
@@ -31,18 +31,18 @@ pub fn build() -> Router<Arc<Context>> {
         .route("/v1/playbooks/:id/logs", get(logger::logs))
         //
         // files
-        .route("/v1/playbooks/:id/files/:reference/:path", get(file::get))
-        .route("/v1/playbooks/:id/files/:reference/:path", post(file::create))
-        .route("/v1/playbooks/:id/files/:reference/:path", put(file::update))
-        .route("/v1/playbooks/:id/files/:reference/:path", delete(file::delete))
-        .route("/v1/playbooks/:id/files/:reference/:path/actions/copy", post(file::copy))
-        .route("/v1/playbooks/:id/files/:reference/:path/actions/move", post(file::rename))
+        .route("/v1/playbooks/:id/files/:path", get(file::get))
+        .route("/v1/playbooks/:id/files/:path", post(file::create))
+        .route("/v1/playbooks/:id/files/:path", put(file::update))
+        .route("/v1/playbooks/:id/files/:path", delete(file::delete))
+        .route("/v1/playbooks/:id/files/:path/actions/copy", post(file::copy))
+        .route("/v1/playbooks/:id/files/:path/actions/move", post(file::rename))
         //
         // folders
-        .route("/v1/playbooks/:id/folders/:reference/:path", get(folder::get))
+        .route("/v1/playbooks/:id/folders/:path", get(folder::get))
         .route("/v1/playbooks/:id/tree", get(folder::tree))
-        .route("/v1/playbooks/:id/folders/:reference/:path", post(folder::create))
-        .route("/v1/playbooks/:id/folders/:reference/:path", delete(folder::delete))
-        .route("/v1/playbooks/:id/folders/:reference/:path/actions/copy", post(folder::copy))
-        .route("/v1/playbooks/:id/folders/:reference/:path/actions/move", post(folder::rename))
+        .route("/v1/playbooks/:id/folders/:path", post(folder::create))
+        .route("/v1/playbooks/:id/folders/:path", delete(folder::delete))
+        .route("/v1/playbooks/:id/folders/:path/actions/copy", post(folder::copy))
+        .route("/v1/playbooks/:id/folders/:path/actions/move", post(folder::rename))
 }
diff --git a/src/services/file.rs b/src/services/file.rs
index f959380..6019ed0 100644
--- a/src/services/file.rs
+++ b/src/services/file.rs
@@ -27,13 +27,13 @@ pub struct FileService;
 
 impl FileService {
     /// Get a file content from the remote git repository.
-    pub async fn get(ctx: Arc<Context>, id: Uuid, reference: String, path: String) -> Result<Content> {
+    pub async fn get(ctx: Arc<Context>, id: Uuid, path: String) -> Result<Content> {
         let playbook = ctx.client.playbooks().get(&id.to_string()).map_err(ApiError::NotFoundPlaybook)?;
         let source = playbook.preface.repository.unwrap();
 
         ctx.github_client
             .contents()
-            .find(&utils::repo(&source.repo)?, &path, &reference)
+            .find(&utils::repo(&source.repo)?, &path, &source.branch.unwrap_or_default())
             .map_err(|e| ApiError::NotFoundContent(e.to_string()))
     }
 
@@ -41,7 +41,6 @@ impl FileService {
     pub async fn create(
         ctx: Arc<Context>,
         id: Uuid,
-        _reference: String,
         path: String,
         content: String,
     ) -> Result<Content> {
@@ -64,7 +63,6 @@ impl FileService {
     pub async fn update(
         _ctx: Arc<Context>,
         _id: Uuid,
-        _reference: String,
         _path: String,
         _content: String,
     ) -> Result<Content> {
@@ -73,7 +71,7 @@ impl FileService {
     }
 
     /// Delete a file from the workspace.
-    pub async fn delete(_ctx: Arc<Context>, _id: Uuid, _reference: String, _path: String) -> Result<()> {
+    pub async fn delete(_ctx: Arc<Context>, _id: Uuid, _path: String) -> Result<()> {
         // refer to create() method.
         todo!()
     }
@@ -82,7 +80,6 @@ impl FileService {
     pub async fn copy(
         _ctx: Arc<Context>,
         _id: Uuid,
-        _reference: String,
         _path: String,
         _destination: String,
     ) -> Result<Content> {
@@ -94,7 +91,6 @@ impl FileService {
     pub async fn rename(
         _ctx: Arc<Context>,
         _id: Uuid,
-        _reference: String,
         _path: String,
         _destination: String,
     ) -> Result<Content> {
diff --git a/src/services/folder.rs b/src/services/folder.rs
index 2a463f4..62438b2 100644
--- a/src/services/folder.rs
+++ b/src/services/folder.rs
@@ -28,7 +28,6 @@ impl FolderService {
     pub async fn get(
         ctx: Arc<Context>,
         id: Uuid,
-        _reference: String,
         path: Option<String>,
     ) -> Result<Vec<File>, ApiError> {
         let playbook = ctx.client.playbooks().get(&id.to_string()).map_err(ApiError::NotFoundPlaybook)?;
@@ -55,18 +54,17 @@ impl FolderService {
             .ok_or(ApiError::NotFoundFolder("The folder is none".to_string()))
     }
 
-    pub async fn create(_ctx: Arc<Context>, _id: Uuid, _reference: String, _path: String) -> Result<Content> {
+    pub async fn create(_ctx: Arc<Context>, _id: Uuid, _path: String) -> Result<Content> {
         todo!()
     }
 
-    pub async fn delete(_ctx: Arc<Context>, _id: Uuid, _reference: String, _path: String) -> Result<()> {
+    pub async fn delete(_ctx: Arc<Context>, _id: Uuid, _path: String) -> Result<()> {
         todo!()
     }
 
     pub async fn copy(
         _ctx: Arc<Context>,
         _id: Uuid,
-        _reference: String,
         _path: String,
         _destination: String,
     ) -> Result<Content> {
@@ -76,7 +74,6 @@ impl FolderService {
     pub async fn rename(
         _ctx: Arc<Context>,
         _id: Uuid,
-        _reference: String,
         _path: String,
         _destination: String,
     ) -> Result<Content> {