diff --git a/crates/assistant/src/assistant_panel.rs b/crates/assistant/src/assistant_panel.rs
index c54a818206ff66d725b7bb3dec99b8e18abc4d0c..445d6a6df6b7395997d9e0bab6ccff153dfe99c5 100644
--- a/crates/assistant/src/assistant_panel.rs
+++ b/crates/assistant/src/assistant_panel.rs
@@ -1596,18 +1596,16 @@ impl ContextEditor {
         cx: &mut ViewContext<Self>,
     ) {
         if let Some(command) = SlashCommandRegistry::global(cx).command(name) {
-            if let Some(lsp_adapter_delegate) = self.lsp_adapter_delegate.clone() {
-                let argument = argument.map(ToString::to_string);
-                let output = command.run(argument.as_deref(), workspace, lsp_adapter_delegate, cx);
-                self.context.update(cx, |context, cx| {
-                    context.insert_command_output(
-                        command_range,
-                        output,
-                        insert_trailing_newline,
-                        cx,
-                    )
-                });
-            }
+            let argument = argument.map(ToString::to_string);
+            let output = command.run(
+                argument.as_deref(),
+                workspace,
+                self.lsp_adapter_delegate.clone(),
+                cx,
+            );
+            self.context.update(cx, |context, cx| {
+                context.insert_command_output(command_range, output, insert_trailing_newline, cx)
+            });
         }
     }
 
diff --git a/crates/assistant/src/context.rs b/crates/assistant/src/context.rs
index 5511223ab93905e94bcd4dbc238f8cc2842d794a..f52225c78c50cc670552eaf168248da70b5eb701 100644
--- a/crates/assistant/src/context.rs
+++ b/crates/assistant/src/context.rs
@@ -3414,7 +3414,7 @@ mod tests {
             self: Arc<Self>,
             _argument: Option<&str>,
             _workspace: WeakView<Workspace>,
-            _delegate: Arc<dyn LspAdapterDelegate>,
+            _delegate: Option<Arc<dyn LspAdapterDelegate>>,
             _cx: &mut WindowContext,
         ) -> Task<Result<SlashCommandOutput>> {
             Task::ready(Ok(SlashCommandOutput {
diff --git a/crates/assistant/src/slash_command/active_command.rs b/crates/assistant/src/slash_command/active_command.rs
index 0f46937560f930ec631b86bec3e20b3492b6d5f0..ad11e0ee081da5085f48164c831ec9be9048b44b 100644
--- a/crates/assistant/src/slash_command/active_command.rs
+++ b/crates/assistant/src/slash_command/active_command.rs
@@ -46,7 +46,7 @@ impl SlashCommand for ActiveSlashCommand {
         self: Arc<Self>,
         _argument: Option<&str>,
         workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let output = workspace.update(cx, |workspace, cx| {
diff --git a/crates/assistant/src/slash_command/default_command.rs b/crates/assistant/src/slash_command/default_command.rs
index ccc9d1fbdb095358661bffd07a5394150c6b4f71..d01eea2f0dd90122d16313f025f7a242d485095f 100644
--- a/crates/assistant/src/slash_command/default_command.rs
+++ b/crates/assistant/src/slash_command/default_command.rs
@@ -44,7 +44,7 @@ impl SlashCommand for DefaultSlashCommand {
         self: Arc<Self>,
         _argument: Option<&str>,
         _workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let store = PromptStore::global(cx);
diff --git a/crates/assistant/src/slash_command/diagnostics_command.rs b/crates/assistant/src/slash_command/diagnostics_command.rs
index 1e9d0503a0cc783d16ea3abe5afb23e44ded2d58..d8413e286ed0753a700f76556479f9f15a9a7caa 100644
--- a/crates/assistant/src/slash_command/diagnostics_command.rs
+++ b/crates/assistant/src/slash_command/diagnostics_command.rs
@@ -158,7 +158,7 @@ impl SlashCommand for DiagnosticsSlashCommand {
         self: Arc<Self>,
         argument: Option<&str>,
         workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let Some(workspace) = workspace.upgrade() else {
diff --git a/crates/assistant/src/slash_command/docs_command.rs b/crates/assistant/src/slash_command/docs_command.rs
index 567d280eb78a9cae2d41090ce6d8c56f1bbc3edd..864ef3c1ef5904b6c5b99b532c7a8be20c03deb8 100644
--- a/crates/assistant/src/slash_command/docs_command.rs
+++ b/crates/assistant/src/slash_command/docs_command.rs
@@ -242,7 +242,7 @@ impl SlashCommand for DocsSlashCommand {
         self: Arc<Self>,
         argument: Option<&str>,
         _workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let Some(argument) = argument else {
diff --git a/crates/assistant/src/slash_command/fetch_command.rs b/crates/assistant/src/slash_command/fetch_command.rs
index 8934d68c1638439ae5821f10de48caf61d888a7e..e1a784f71aee4379fd57c9dfa210b2df156e0639 100644
--- a/crates/assistant/src/slash_command/fetch_command.rs
+++ b/crates/assistant/src/slash_command/fetch_command.rs
@@ -129,7 +129,7 @@ impl SlashCommand for FetchSlashCommand {
         self: Arc<Self>,
         argument: Option<&str>,
         workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let Some(argument) = argument else {
diff --git a/crates/assistant/src/slash_command/file_command.rs b/crates/assistant/src/slash_command/file_command.rs
index af35bacd2a5c99813fa2e215de1cda8894e04c41..b10a34e44e65f132d41d631b0616f1d644141002 100644
--- a/crates/assistant/src/slash_command/file_command.rs
+++ b/crates/assistant/src/slash_command/file_command.rs
@@ -136,7 +136,7 @@ impl SlashCommand for FileSlashCommand {
         self: Arc<Self>,
         argument: Option<&str>,
         workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let Some(workspace) = workspace.upgrade() else {
diff --git a/crates/assistant/src/slash_command/now_command.rs b/crates/assistant/src/slash_command/now_command.rs
index 73f4f7b2565f8303d62ac96d58fbf0a7441e4036..ccd3d713d8e9bc965cca25b0132012bd4aededca 100644
--- a/crates/assistant/src/slash_command/now_command.rs
+++ b/crates/assistant/src/slash_command/now_command.rs
@@ -44,7 +44,7 @@ impl SlashCommand for NowSlashCommand {
         self: Arc<Self>,
         _argument: Option<&str>,
         _workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         _cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let now = Local::now();
diff --git a/crates/assistant/src/slash_command/project_command.rs b/crates/assistant/src/slash_command/project_command.rs
index c6c394f56bde2bc5d323af13f3a394b6c9beb423..581b216b572aff6146983e43d9225fdd0ba97c5a 100644
--- a/crates/assistant/src/slash_command/project_command.rs
+++ b/crates/assistant/src/slash_command/project_command.rs
@@ -119,7 +119,7 @@ impl SlashCommand for ProjectSlashCommand {
         self: Arc<Self>,
         _argument: Option<&str>,
         workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let output = workspace.update(cx, |workspace, cx| {
diff --git a/crates/assistant/src/slash_command/prompt_command.rs b/crates/assistant/src/slash_command/prompt_command.rs
index 1edf2d51df084fdd4cb513df88bc350e3546446e..24b4802230bf61fd14cd86b75e9f6bbd4224bb7c 100644
--- a/crates/assistant/src/slash_command/prompt_command.rs
+++ b/crates/assistant/src/slash_command/prompt_command.rs
@@ -55,7 +55,7 @@ impl SlashCommand for PromptSlashCommand {
         self: Arc<Self>,
         title: Option<&str>,
         _workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let Some(title) = title else {
diff --git a/crates/assistant/src/slash_command/search_command.rs b/crates/assistant/src/slash_command/search_command.rs
index cdf1da7a9b7c9b12d894fef19e55b963fb445a68..979b1edb89f2f948ab3e80ce6b7db97ff8f565e5 100644
--- a/crates/assistant/src/slash_command/search_command.rs
+++ b/crates/assistant/src/slash_command/search_command.rs
@@ -54,7 +54,7 @@ impl SlashCommand for SearchSlashCommand {
         self: Arc<Self>,
         argument: Option<&str>,
         workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let Some(workspace) = workspace.upgrade() else {
diff --git a/crates/assistant/src/slash_command/symbols_command.rs b/crates/assistant/src/slash_command/symbols_command.rs
index 11a056f0daf5cbcd6429c5d327bb8b50e141096c..4788063aa1b6db8316a36b1ae464eeea1d2b1f8b 100644
--- a/crates/assistant/src/slash_command/symbols_command.rs
+++ b/crates/assistant/src/slash_command/symbols_command.rs
@@ -42,7 +42,7 @@ impl SlashCommand for OutlineSlashCommand {
         self: Arc<Self>,
         _argument: Option<&str>,
         workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let output = workspace.update(cx, |workspace, cx| {
diff --git a/crates/assistant/src/slash_command/tabs_command.rs b/crates/assistant/src/slash_command/tabs_command.rs
index 78be293bd7c7d195df11dd2a04ea395d2c6af147..41da270d5abe9a9ba3ee480d3284bde68c4617dd 100644
--- a/crates/assistant/src/slash_command/tabs_command.rs
+++ b/crates/assistant/src/slash_command/tabs_command.rs
@@ -46,7 +46,7 @@ impl SlashCommand for TabsSlashCommand {
         self: Arc<Self>,
         _argument: Option<&str>,
         workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let open_buffers = workspace.update(cx, |workspace, cx| {
diff --git a/crates/assistant/src/slash_command/term_command.rs b/crates/assistant/src/slash_command/term_command.rs
index 90c3cb0fb955dfa72b5df851de78873815b98354..277e13238f63612e9da0c9df61e3ecd3b18b47b8 100644
--- a/crates/assistant/src/slash_command/term_command.rs
+++ b/crates/assistant/src/slash_command/term_command.rs
@@ -58,7 +58,7 @@ impl SlashCommand for TermSlashCommand {
         self: Arc<Self>,
         argument: Option<&str>,
         workspace: WeakView<Workspace>,
-        _delegate: Arc<dyn LspAdapterDelegate>,
+        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let Some(workspace) = workspace.upgrade() else {
diff --git a/crates/assistant_slash_command/src/assistant_slash_command.rs b/crates/assistant_slash_command/src/assistant_slash_command.rs
index 5f917363a23073c0faf2109e4ae4f9bdda8b5138..b33c2ce50b41cd1e9f9c9be287d05f3b112d7762 100644
--- a/crates/assistant_slash_command/src/assistant_slash_command.rs
+++ b/crates/assistant_slash_command/src/assistant_slash_command.rs
@@ -49,7 +49,7 @@ pub trait SlashCommand: 'static + Send + Sync {
         //
         // It may be that `LspAdapterDelegate` needs a more general name, or
         // perhaps another kind of delegate is needed here.
-        delegate: Arc<dyn LspAdapterDelegate>,
+        delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>>;
 }
diff --git a/crates/extension/src/extension_slash_command.rs b/crates/extension/src/extension_slash_command.rs
index 086ddafbb019cf3b2a95cf382a6b7ff21640b751..a7bc1523b93a09e43390e90f33119c6afa1ac4ae 100644
--- a/crates/extension/src/extension_slash_command.rs
+++ b/crates/extension/src/extension_slash_command.rs
@@ -81,7 +81,7 @@ impl SlashCommand for ExtensionSlashCommand {
         self: Arc<Self>,
         argument: Option<&str>,
         _workspace: WeakView<Workspace>,
-        delegate: Arc<dyn LspAdapterDelegate>,
+        delegate: Option<Arc<dyn LspAdapterDelegate>>,
         cx: &mut WindowContext,
     ) -> Task<Result<SlashCommandOutput>> {
         let argument = argument.map(|arg| arg.to_string());
@@ -91,6 +91,9 @@ impl SlashCommand for ExtensionSlashCommand {
                     let this = self.clone();
                     move |extension, store| {
                         async move {
+                            let delegate = delegate.ok_or_else(|| {
+                                anyhow!("no worktree for extension slash command")
+                            })?;
                             let resource = store.data_mut().table().push(delegate)?;
                             let output = extension
                                 .call_run_slash_command(