.

crates/workspace/src/views/repo_detail/diff.rs

@@ -13,6 +13,7 @@ use gpui::{
 use gpui_component::clipboard::Clipboard;
 use gpui_component::dock::{Panel, PanelEvent};
 use gpui_component::list::ListItem;
+use gpui_component::resizable::{resizable_panel, v_resizable};
 use gpui_component::spinner::Spinner;
 use gpui_component::tag::Tag;
 use gpui_component::tree::{TreeEntry, TreeItem, TreeState, tree};
@@ -201,12 +202,12 @@ impl CommitDiffView {
                     .flex_1()
                     .min_h_0()
                     .when(self.diff.is_some(), |this| {
-                        this.child(tree(
-                            &tree_state,
-                            move |ix, entry, selected, _window, _cx| {
+                        this.child(
+                            tree(&tree_state, move |ix, entry, selected, _window, _cx| {
                                 Self::render_tree_item(ix, entry, selected, &view)
-                            },
-                        ))
+                            })
+                            .p_2(),
+                        )
                     })
                     .when(self.diff.is_none() && !self.loading, |this| {
                         this.child(
@@ -425,14 +426,12 @@ impl CommitDiffView {
 
         v_flex()
             .px_4()
-            .py_2()
+            .pt_2()
+            .pb_4()
             .w_full()
             .gap_4()
-            .border_b_1()
-            .border_color(cx.theme().border)
             .child(
                 v_flex()
-                    .gap_2()
                     .child(
                         div()
                             .font_semibold()
@@ -442,7 +441,7 @@ impl CommitDiffView {
                     )
                     .child(
                         h_flex()
-                            .gap_2p5()
+                            .gap_2()
                             .text_sm()
                             .child(h_flex().child(format!("{} committed", commit.author)))
                             .child(
@@ -482,7 +481,7 @@ impl CommitDiffView {
                     })
                     .when(deletions > 0, |this| {
                         this.child(
-                            Tag::success()
+                            Tag::danger()
                                 .outline()
                                 .small()
                                 .child(format!("- {insertions}")),
@@ -528,17 +527,24 @@ impl Focusable for CommitDiffView {
 
 impl Render for CommitDiffView {
     fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
-        v_flex()
-            .id("commit-diff")
-            .size_full()
-            .child(self.render_header(cx))
+        v_resizable("commit-diff")
             .child(
+                resizable_panel()
+                    .size(px(170.))
+                    .size_range(px(100.)..px(400.))
+                    .flex_none()
+                    .bg(cx.theme().background)
+                    .child(self.render_header(cx)),
+            )
+            .child(
+                resizable_panel().child(
                     h_flex()
-                    .flex_1()
-                    .w_full()
+                        .size_full()
                         .min_h_0()
+                        .bg(cx.theme().background)
                         .child(self.render_tree_column(cx))
                         .child(self.render_detail_column(cx)),
+                ),
             )
     }
 }

crates/workspace/src/views/repo_detail/mod.rs

@@ -592,19 +592,18 @@ impl RepoDetailView {
         let Some(worktree) = self.worktree.clone() else {
             return;
         };
+
         // Same display name as the repo detail panel's title.
         let announcement = self.announcement.as_ref().unwrap_or(&self.initial);
         let repo_name = announcement
             .name
             .clone()
             .unwrap_or_else(|| SharedString::from(announcement.id.clone()));
-
         let panel =
             cx.new(|cx| CommitDiffView::new(worktree, repo_name, commit.clone(), window, cx));
+
         if let Some(dock_area) = self.dock_area.upgrade() {
             dock_area.update(cx, |dock_area, cx| {
-                // The diff viewer lives in the bottom dock, leaving the
-                // central explorer open while browsing a commit.
                 dock_area.add_panel(Arc::new(panel), DockPlacement::Bottom, None, window, cx);
             });
         }