diff --git a/AgentCompany-Rust/crates/app_ui/src/app_root/inbox.rs b/AgentCompany-Rust/crates/app_ui/src/app_root/inbox.rs
index c21c3311..d1d42458 100644
--- a/AgentCompany-Rust/crates/app_ui/src/app_root/inbox.rs
+++ b/AgentCompany-Rust/crates/app_ui/src/app_root/inbox.rs
@@ -55,7 +55,7 @@ impl AppRoot {
         div()
             .flex()
             .flex_col()
-            .gap_5()
+            .gap_4()
             .child(
                 div()
                     .child(
@@ -82,7 +82,7 @@ impl AppRoot {
             ))
             .child(
                 div()
-                    .rounded_lg()
+                    .rounded_md()
                     .border_1()
                     .border_color(theme::panel_border())
                     .bg(theme::panel())
@@ -177,8 +177,8 @@ impl InboxRow {
                 }
                 cx.notify();
             }))
-            .px_5()
-            .py_4()
+            .px_4()
+            .py_3()
             .border_b_1()
             .border_color(theme::panel_border())
             .child(
diff --git a/AgentCompany-Rust/crates/app_ui/src/app_root/messages.rs b/AgentCompany-Rust/crates/app_ui/src/app_root/messages.rs
index 3e269a8f..413be346 100644
--- a/AgentCompany-Rust/crates/app_ui/src/app_root/messages.rs
+++ b/AgentCompany-Rust/crates/app_ui/src/app_root/messages.rs
@@ -37,7 +37,7 @@ impl AppRoot {
 
         div()
             .flex()
-            .gap_4()
+            .gap_3()
             .child(render_message_sidebar(
                 &channel_groups,
                 selected_channel.as_deref(),
@@ -48,7 +48,7 @@ impl AppRoot {
                 div()
                     .flex_1()
                     .border_1()
-                    .rounded_lg()
+                    .rounded_md()
                     .border_color(theme::panel_border())
                     .bg(theme::panel())
                     .child(render_message_header(
@@ -225,13 +225,13 @@ fn render_message_sidebar<'a>(
     cx: &'a mut Context<AppRoot>,
 ) -> impl IntoElement + 'a {
     div()
-        .w(px(280.0))
+        .w(px(292.0))
         .p_3()
         .gap_3()
         .border_1()
-        .rounded_lg()
+        .rounded_md()
         .border_color(theme::panel_border())
-        .bg(theme::panel())
+        .bg(theme::sidebar_bg())
         .children(groups.iter().map(|group| {
             div()
                 .gap_2()
@@ -256,7 +256,7 @@ fn render_message_sidebar<'a>(
                         } else {
                             theme::panel()
                         })
-                        .rounded_lg()
+                        .rounded_md()
                         .px_3()
                         .py_2()
                         .on_click(cx.listener(move |this, _, _, cx| {
@@ -274,7 +274,7 @@ fn render_message_sidebar<'a>(
                                     div()
                                         .w(px(28.0))
                                         .h(px(28.0))
-                                        .rounded_lg()
+                                        .rounded_md()
                                         .bg(theme::panel_muted()),
                                 )
                                 .child(
diff --git a/AgentCompany-Rust/crates/app_ui/src/app_root/messages_parts.rs b/AgentCompany-Rust/crates/app_ui/src/app_root/messages_parts.rs
index 9c47492e..f5924b46 100644
--- a/AgentCompany-Rust/crates/app_ui/src/app_root/messages_parts.rs
+++ b/AgentCompany-Rust/crates/app_ui/src/app_root/messages_parts.rs
@@ -13,8 +13,8 @@ pub(super) fn selected_message_card(message: Option<&domain::AgentMessage>) -> i
             .to_string()
     });
     div()
-        .p_5()
-        .rounded_lg()
+        .p_4()
+        .rounded_md()
         .border_1()
         .border_color(theme::panel_border())
         .bg(theme::panel())
@@ -82,10 +82,12 @@ fn message_header(message: Option<&domain::AgentMessage>, urgent: bool) -> impl
         .gap_3()
         .child(
             div()
-                .w(px(44.0))
-                .h(px(44.0))
+                .w(px(40.0))
+                .h(px(40.0))
                 .rounded_full()
                 .bg(theme::accent_orange_soft())
+                .border_1()
+                .border_color(theme::panel_border())
                 .text_color(theme::accent_orange())
                 .flex()
                 .items_center()
diff --git a/AgentCompany-Rust/prd.json b/AgentCompany-Rust/prd.json
index 3b8324ae..feeab504 100644
--- a/AgentCompany-Rust/prd.json
+++ b/AgentCompany-Rust/prd.json
@@ -315,8 +315,8 @@
         "cargo test --workspace passes"
       ],
       "priority": 23,
-      "passes": false,
-      "notes": "Opened after structural communication remediation."
+      "passes": true,
+      "notes": "Passed: messages and inbox chrome were tightened toward screenshot parity with calmer pane spacing, smaller radii, warmer sidebar treatment, lighter message avatar chrome, and denser list rows while keeping real interactions intact."
     },
     {
       "id": "US-024",
diff --git a/AgentCompany-Rust/progress.txt b/AgentCompany-Rust/progress.txt
index 8e3e5322..82715ffc 100644
--- a/AgentCompany-Rust/progress.txt
+++ b/AgentCompany-Rust/progress.txt
@@ -32,3 +32,5 @@ Started: 2026-04-19
 - Completed US-021 current-directory-only final re-audit. All current-directory UI remediation stories are now closed, ui-parity-audit.md records the final status and known limits, and the workspace passes cargo clippy and cargo test.
 
 - Completed US-022 shared skin pass. Current-directory theme tokens now align more closely with the screenshot-derived desktop skin: warmer window/sidebar fills, softer panel borders, gentler selected states, and more restrained accent surfaces.
+
+- Completed US-023 communication skin pass. Messages and inbox now use tighter pane spacing, softer desktop chrome, warmer sidebar treatment, calmer card radii, and denser row padding while preserving the existing native communication interactions.