diff --git a/crates/ely_app/src/shell/mod.rs b/crates/ely_app/src/shell/mod.rs
index 510401e..2b48000 100644
--- a/crates/ely_app/src/shell/mod.rs
+++ b/crates/ely_app/src/shell/mod.rs
@@ -1,7 +1,7 @@
 mod render;
 
 use ely_browser_core::{BrowserCore, InitialBrowserConfig};
-use ely_domain::{CommandIntent, TabId, UrlText};
+use ely_domain::{CommandIntent, SpaceId, TabId, UrlText};
 use gpui::{App, AppContext, Context, Entity, FocusHandle, Focusable, Subscription, Window};
 use gpui_component::input::{InputEvent, InputState, SelectAll};
 
@@ -11,7 +11,7 @@ use crate::{
 };
 
 enum ShellState {
-    Ready(BrowserCore),
+    Ready(Box<BrowserCore>),
     StartupError(String),
 }
 
@@ -66,7 +66,7 @@ impl ElyShell {
                 _ => ely_domain::DomainError::InvalidCommand,
             })
         }) {
-            Ok(core) => ShellState::Ready(core),
+            Ok(core) => ShellState::Ready(Box::new(core)),
             Err(error) => ShellState::StartupError(error.to_string()),
         };
 
@@ -106,6 +106,15 @@ impl ElyShell {
         }
     }
 
+    fn select_space(&mut self, space_id: &SpaceId, window: &mut Window, cx: &mut Context<Self>) {
+        if let ShellState::Ready(core) = &mut self.state
+            && core.select_space(space_id).is_ok()
+        {
+            self.sync_address_input(window, cx);
+            cx.notify();
+        }
+    }
+
     fn select_next_tab(&mut self, window: &mut Window, cx: &mut Context<Self>) {
         if let ShellState::Ready(core) = &mut self.state
             && core.select_next_tab().is_ok()
diff --git a/crates/ely_app/src/shell/render.rs b/crates/ely_app/src/shell/render.rs
index b782212..8f571b0 100644
--- a/crates/ely_app/src/shell/render.rs
+++ b/crates/ely_app/src/shell/render.rs
@@ -1,6 +1,6 @@
 use ely_browser_core::BrowserSnapshot;
 use ely_design_system::{ELY_THEME, colors, spacing};
-use ely_domain::{ArchiveSource, ArchivedTab, BrowserTab};
+use ely_domain::{ArchiveSource, ArchivedTab, BrowserTab, Space};
 use gpui::{
     AnyElement, Context, InteractiveElement, IntoElement, ParentElement, Render, SharedString,
     StatefulInteractiveElement, Styled, Window, div, px, rgb,
@@ -157,16 +157,9 @@ impl ElyShell {
                 }),
             )
             .child(section_label("Space"))
-            .child(
-                div()
-                    .rounded_md()
-                    .bg(rgb(colors::SURFACE_CARD))
-                    .border_1()
-                    .border_color(rgb(colors::HAIRLINE))
-                    .px_3()
-                    .py_2()
-                    .child(snapshot.active_space_name.clone()),
-            )
+            .children(snapshot.spaces.iter().map(|space| {
+                self.render_space_row(space, space.id() == &snapshot.active_space_id, cx)
+            }))
             .child(section_label("Tabs"))
             .children(
                 snapshot
@@ -195,6 +188,44 @@ impl ElyShell {
             .into_any_element()
     }
 
+    fn render_space_row(
+        &mut self,
+        space: &Space,
+        active: bool,
+        cx: &mut Context<Self>,
+    ) -> AnyElement {
+        let space_id = space.id().clone();
+        let background = if active { colors::SURFACE_CARD } else { colors::CANVAS };
+        let border = if active { colors::HAIRLINE_STRONG } else { colors::HAIRLINE };
+
+        div()
+            .id(SharedString::from(format!("space-{}", space.id().as_str())))
+            .rounded_md()
+            .border_1()
+            .border_color(rgb(border))
+            .bg(rgb(background))
+            .px_3()
+            .py_2()
+            .gap_2()
+            .flex()
+            .items_center()
+            .cursor_pointer()
+            .hover(|style| style.bg(rgb(colors::SURFACE_CARD)))
+            .active(|style| style.opacity(0.82))
+            .on_click(cx.listener(move |shell, _, window, cx| {
+                shell.select_space(&space_id, window, cx);
+            }))
+            .child(
+                div()
+                    .text_xs()
+                    .font_semibold()
+                    .text_color(rgb(colors::PRIMARY))
+                    .child(space.icon().to_string()),
+            )
+            .child(div().text_sm().font_semibold().child(space.name().to_string()))
+            .into_any_element()
+    }
+
     fn render_favorite_row(
         &mut self,
         tab: &BrowserTab,
diff --git a/crates/ely_browser_core/src/error.rs b/crates/ely_browser_core/src/error.rs
index 981059c..ae58c2c 100644
--- a/crates/ely_browser_core/src/error.rs
+++ b/crates/ely_browser_core/src/error.rs
@@ -1,4 +1,4 @@
-use ely_domain::{DomainError, TabId};
+use ely_domain::{DomainError, SpaceId, TabId};
 use thiserror::Error;
 
 #[derive(Clone, Debug, Error, Eq, PartialEq)]
@@ -9,6 +9,9 @@ pub enum CoreError {
     #[error("tab not found: {id}")]
     TabNotFound { id: TabId },
 
+    #[error("space not found: {id}")]
+    SpaceNotFound { id: SpaceId },
+
     #[error("favorite limit reached: {limit}")]
     FavoriteLimitReached { limit: usize },
 
diff --git a/crates/ely_browser_core/src/lib.rs b/crates/ely_browser_core/src/lib.rs
index 3fdcdc1..0bd1845 100644
--- a/crates/ely_browser_core/src/lib.rs
+++ b/crates/ely_browser_core/src/lib.rs
@@ -1,4 +1,5 @@
 mod error;
+mod navigation;
 mod state;
 
 pub use error::CoreError;
diff --git a/crates/ely_browser_core/src/navigation.rs b/crates/ely_browser_core/src/navigation.rs
new file mode 100644
index 0000000..b3a1d86
--- /dev/null
+++ b/crates/ely_browser_core/src/navigation.rs
@@ -0,0 +1,42 @@
+use ely_domain::{BrowserTab, DomainError, UrlText};
+use url::Url;
+
+use crate::CoreError;
+
+const DEFAULT_SEARCH_URL: &str = "https://duckduckgo.com/";
+
+pub(crate) fn tab_title(url: &UrlText) -> String {
+    if url.as_str() == "ely://new-tab" {
+        return "New Tab".to_string();
+    }
+
+    url.display_host()
+}
+
+pub(crate) fn tab_matches_query(tab: &BrowserTab, normalized_query: &str) -> bool {
+    tab.title().to_lowercase().contains(normalized_query)
+        || tab.url().as_str().to_lowercase().contains(normalized_query)
+        || tab.display_url().to_lowercase().contains(normalized_query)
+}
+
+pub(crate) fn new_space_name(command: &str) -> Option<&str> {
+    let normalized_command = command.to_ascii_lowercase();
+    for prefix in ["new-space ", "new space "] {
+        if normalized_command.starts_with(prefix) {
+            let name = command[prefix.len()..].trim();
+            return (!name.is_empty()).then_some(name);
+        }
+    }
+    None
+}
+
+pub(crate) fn space_icon(name: &str) -> String {
+    name.chars().next().map_or_else(String::new, |value| value.to_string())
+}
+
+pub(crate) fn search_url(query: &str) -> Result<UrlText, CoreError> {
+    let mut url = Url::parse(DEFAULT_SEARCH_URL)
+        .map_err(|_| DomainError::InvalidUrl { value: DEFAULT_SEARCH_URL.to_string() })?;
+    url.query_pairs_mut().append_pair("q", query);
+    UrlText::parse(url.to_string()).map_err(CoreError::from)
+}
diff --git a/crates/ely_browser_core/src/state.rs b/crates/ely_browser_core/src/state.rs
index 29daad3..d6ccac0 100644
--- a/crates/ely_browser_core/src/state.rs
+++ b/crates/ely_browser_core/src/state.rs
@@ -1,12 +1,15 @@
+use std::collections::BTreeMap;
+
 use ely_domain::{
     ArchiveSource, ArchivedTab, BrowserTab, CommandIntent, CommandScope, DomainError, Profile,
     ProfileId, ProfileKind, Space, SpaceId, TabId, UrlText,
 };
-use url::Url;
 
-use crate::CoreError;
+use crate::{
+    CoreError,
+    navigation::{new_space_name, search_url, space_icon, tab_matches_query, tab_title},
+};
 
-const DEFAULT_SEARCH_URL: &str = "https://duckduckgo.com/";
 const DEFAULT_FAVORITE_LIMIT: usize = 12;
 
 #[derive(Clone, Debug)]
@@ -34,7 +37,9 @@ pub struct BrowserSnapshot {
     pub favorites: Vec<BrowserTab>,
     pub pinned_tabs: Vec<BrowserTab>,
     pub archived_tabs: Vec<ArchivedTab>,
+    pub spaces: Vec<Space>,
     pub active_tab_id: TabId,
+    pub active_space_id: SpaceId,
     pub active_space_name: String,
     pub active_profile_name: String,
     pub command_query: String,
@@ -49,6 +54,7 @@ pub struct BrowserCore {
     active_space_id: SpaceId,
     active_profile_id: ProfileId,
     active_tab_id: TabId,
+    active_tabs_by_space: BTreeMap<SpaceId, TabId>,
     command_query: String,
     new_tab_url: UrlText,
 }
@@ -58,18 +64,24 @@ impl BrowserCore {
         let space = Space::new(config.space_name, config.space_icon, 0xf54e00);
         let profile = Profile::new(config.profile_name, 0x26251e, ProfileKind::Standard);
         let new_tab_url = config.initial_url;
+        let active_space_id = space.id().clone();
+        let active_profile_id = profile.id().clone();
         let tab = BrowserTab::new(
             TabId::new(),
-            space.id().clone(),
-            profile.id().clone(),
+            active_space_id.clone(),
+            active_profile_id.clone(),
             "New Tab",
             new_tab_url.clone(),
         );
+        let active_tab_id = tab.id().clone();
+        let mut active_tabs_by_space = BTreeMap::new();
+        active_tabs_by_space.insert(active_space_id.clone(), active_tab_id.clone());
 
         Ok(Self {
-            active_space_id: space.id().clone(),
-            active_profile_id: profile.id().clone(),
-            active_tab_id: tab.id().clone(),
+            active_space_id,
+            active_profile_id,
+            active_tab_id,
+            active_tabs_by_space,
             spaces: vec![space],
             profiles: vec![profile],
             tabs: vec![tab],
@@ -89,9 +101,65 @@ impl BrowserCore {
             .map_or(self.tabs.len(), |index| index + 1);
         self.tabs.insert(insert_index, tab);
         self.active_tab_id = tab_id.clone();
+        self.active_tabs_by_space.insert(self.active_space_id.clone(), tab_id.clone());
         tab_id
     }
 
+    pub fn create_space(
+        &mut self,
+        name: impl Into<String>,
+        icon: impl Into<String>,
+        accent_hex: u32,
+    ) -> Result<SpaceId, CoreError> {
+        let space = Space::new(name, icon, accent_hex);
+        let space_id = space.id().clone();
+        let tab = self.build_tab_for(
+            space_id.clone(),
+            self.active_profile_id.clone(),
+            self.new_tab_url.clone(),
+        );
+        let tab_id = tab.id().clone();
+
+        self.spaces.push(space);
+        self.tabs.push(tab);
+        self.active_tabs_by_space.insert(space_id.clone(), tab_id.clone());
+        self.select_tab(&tab_id)?;
+        Ok(space_id)
+    }
+
+    pub fn select_space(&mut self, space_id: &SpaceId) -> Result<TabId, CoreError> {
+        if !self.spaces.iter().any(|space| space.id() == space_id) {
+            return Err(CoreError::SpaceNotFound { id: space_id.clone() });
+        }
+
+        if let Some(tab_id) = self
+            .active_tabs_by_space
+            .get(space_id)
+            .filter(|tab_id| self.tab_belongs_to_space(tab_id, space_id))
+            .cloned()
+        {
+            self.select_tab(&tab_id)?;
+            return Ok(tab_id);
+        }
+
+        if let Some(tab_id) =
+            self.tabs.iter().find(|tab| tab.space_id() == space_id).map(|tab| tab.id().clone())
+        {
+            self.select_tab(&tab_id)?;
+            return Ok(tab_id);
+        }
+
+        let tab = self.build_tab_for(
+            space_id.clone(),
+            self.active_profile_id.clone(),
+            self.new_tab_url.clone(),
+        );
+        let tab_id = tab.id().clone();
+        self.tabs.push(tab);
+        self.select_tab(&tab_id)?;
+        Ok(tab_id)
+    }
+
     pub fn close_active_tab(&mut self) -> Result<TabId, CoreError> {
         let tab_id = self.active_tab_id.clone();
         self.close_tab(&tab_id)
@@ -106,20 +174,33 @@ impl BrowserCore {
         let was_active = &self.active_tab_id == tab_id;
 
         let closed_tab = self.tabs.remove(close_index);
+        let closed_space_id = closed_tab.space_id().clone();
+        let closed_profile_id = closed_tab.profile_id().clone();
+        let was_space_active_tab = self.active_tabs_by_space.get(&closed_space_id) == Some(tab_id);
         self.archived_tabs.push(ArchivedTab::new(closed_tab, ArchiveSource::ManualClose));
 
-        if self.tabs.is_empty() {
-            let tab = self.build_tab(self.new_tab_url.clone());
-            let replacement_id = tab.id().clone();
-            self.tabs.push(tab);
-            self.active_tab_id = replacement_id.clone();
-            return Ok(replacement_id);
+        if let Some(next_tab_id) = self.nearest_tab_in_space(&closed_space_id, close_index) {
+            if was_space_active_tab {
+                self.active_tabs_by_space.insert(closed_space_id, next_tab_id.clone());
+            }
+            if was_active {
+                self.select_tab(&next_tab_id)?;
+            }
+            return Ok(self.active_tab_id.clone());
         }
 
+        let tab = self.build_tab_for(
+            closed_space_id.clone(),
+            closed_profile_id,
+            self.new_tab_url.clone(),
+        );
+        let replacement_id = tab.id().clone();
+        self.tabs.insert(close_index.min(self.tabs.len()), tab);
+        self.active_tabs_by_space.insert(closed_space_id, replacement_id.clone());
+
         if was_active {
-            let next_index = close_index.min(self.tabs.len() - 1);
-            let next_tab_id = self.tabs[next_index].id().clone();
-            self.select_tab(&next_tab_id)?;
+            self.select_tab(&replacement_id)?;
+            return Ok(replacement_id);
         }
 
         Ok(self.active_tab_id.clone())
@@ -180,10 +261,14 @@ impl BrowserCore {
             .iter()
             .find(|tab| tab.id() == tab_id)
             .ok_or_else(|| CoreError::TabNotFound { id: tab_id.clone() })?;
+        let active_space_id = tab.space_id().clone();
+        let active_profile_id = tab.profile_id().clone();
+        let active_tab_id = tab.id().clone();
 
-        self.active_tab_id = tab.id().clone();
-        self.active_space_id = tab.space_id().clone();
-        self.active_profile_id = tab.profile_id().clone();
+        self.active_tab_id = active_tab_id.clone();
+        self.active_space_id = active_space_id.clone();
+        self.active_profile_id = active_profile_id;
+        self.active_tabs_by_space.insert(active_space_id, active_tab_id);
         Ok(())
     }
 
@@ -280,8 +365,10 @@ impl BrowserCore {
             favorites: self.favorites(),
             pinned_tabs: self.pinned_tabs(),
             archived_tabs: self.archived_tabs.clone(),
-            tabs: self.tabs.clone(),
+            spaces: self.spaces.clone(),
+            tabs: self.visible_tabs(),
             active_tab_id: self.active_tab_id.clone(),
+            active_space_id: self.active_space_id.clone(),
             active_space_name: active_space.name().to_string(),
             active_profile_name: active_profile.name().to_string(),
             command_query: self.command_query.clone(),
@@ -296,16 +383,31 @@ impl BrowserCore {
     }
 
     fn select_tab_by_offset(&mut self, offset: isize) -> Result<TabId, CoreError> {
-        let active_index = self.active_tab_index()?;
-        let tab_count = self.tabs.len() as isize;
+        let visible_tab_ids = self
+            .tabs
+            .iter()
+            .filter(|tab| tab.space_id() == &self.active_space_id)
+            .map(|tab| tab.id().clone())
+            .collect::<Vec<_>>();
+        let active_index = visible_tab_ids
+            .iter()
+            .position(|tab_id| tab_id == &self.active_tab_id)
+            .ok_or(CoreError::MissingActiveTab)?;
+        let tab_count = visible_tab_ids.len() as isize;
         let next_index = (active_index as isize + offset).rem_euclid(tab_count) as usize;
-        let next_tab_id = self.tabs[next_index].id().clone();
+        let next_tab_id = visible_tab_ids[next_index].clone();
         self.select_tab(&next_tab_id)?;
         Ok(next_tab_id)
     }
 
     fn submit_named_command(&mut self, command: &str) -> Result<bool, CoreError> {
-        match command.trim().to_ascii_lowercase().as_str() {
+        let command = command.trim();
+        if let Some(name) = new_space_name(command) {
+            self.create_space(name.to_string(), space_icon(name), 0xf54e00)?;
+            return Ok(true);
+        }
+
+        match command.to_ascii_lowercase().as_str() {
             "new-tab" => {
                 self.open_tab(self.new_tab_url.clone());
                 Ok(true)
@@ -344,11 +446,16 @@ impl BrowserCore {
     fn pinned_tabs(&self) -> Vec<BrowserTab> {
         self.tabs
             .iter()
+            .filter(|tab| tab.space_id() == &self.active_space_id)
             .filter(|tab| tab.flags().pinned && !tab.flags().favorite)
             .cloned()
             .collect()
     }
 
+    fn visible_tabs(&self) -> Vec<BrowserTab> {
+        self.tabs.iter().filter(|tab| tab.space_id() == &self.active_space_id).cloned().collect()
+    }
+
     fn find_tab_match(&self, query: &str) -> Option<TabId> {
         let normalized_query = query.trim().to_lowercase();
         self.tabs
@@ -358,34 +465,24 @@ impl BrowserCore {
     }
 
     fn build_tab(&self, url: UrlText) -> BrowserTab {
+        self.build_tab_for(self.active_space_id.clone(), self.active_profile_id.clone(), url)
+    }
+
+    fn build_tab_for(&self, space_id: SpaceId, profile_id: ProfileId, url: UrlText) -> BrowserTab {
         let title = tab_title(&url);
-        BrowserTab::new(
-            TabId::new(),
-            self.active_space_id.clone(),
-            self.active_profile_id.clone(),
-            title,
-            url,
-        )
-    }
-}
-
-fn tab_title(url: &UrlText) -> String {
-    if url.as_str() == "ely://new-tab" {
-        return "New Tab".to_string();
+        BrowserTab::new(TabId::new(), space_id, profile_id, title, url)
     }
 
-    url.display_host()
-}
+    fn nearest_tab_in_space(&self, space_id: &SpaceId, start_index: usize) -> Option<TabId> {
+        self.tabs
+            .iter()
+            .skip(start_index)
+            .chain(self.tabs.iter().take(start_index))
+            .find(|tab| tab.space_id() == space_id)
+            .map(|tab| tab.id().clone())
+    }
 
-fn tab_matches_query(tab: &BrowserTab, normalized_query: &str) -> bool {
-    tab.title().to_lowercase().contains(normalized_query)
-        || tab.url().as_str().to_lowercase().contains(normalized_query)
-        || tab.display_url().to_lowercase().contains(normalized_query)
-}
-
-fn search_url(query: &str) -> Result<UrlText, CoreError> {
-    let mut url = Url::parse(DEFAULT_SEARCH_URL)
-        .map_err(|_| DomainError::InvalidUrl { value: DEFAULT_SEARCH_URL.to_string() })?;
-    url.query_pairs_mut().append_pair("q", query);
-    UrlText::parse(url.to_string()).map_err(CoreError::from)
+    fn tab_belongs_to_space(&self, tab_id: &TabId, space_id: &SpaceId) -> bool {
+        self.tabs.iter().any(|tab| tab.id() == tab_id && tab.space_id() == space_id)
+    }
 }
diff --git a/crates/ely_browser_core/tests/commands.rs b/crates/ely_browser_core/tests/commands.rs
index d05411d..c992a59 100644
--- a/crates/ely_browser_core/tests/commands.rs
+++ b/crates/ely_browser_core/tests/commands.rs
@@ -49,6 +49,25 @@ fn new_tab_command_opens_new_tab() -> Result<(), Box<dyn Error>> {
     Ok(())
 }
 
+#[test]
+fn new_space_command_creates_and_selects_named_space() -> Result<(), Box<dyn Error>> {
+    let mut core = BrowserCore::new(InitialBrowserConfig::ely_defaults()?)?;
+
+    core.set_command_query(">new-space Research");
+    let intent = core.submit_command()?;
+    let snapshot = core.snapshot()?;
+    let active_tab = core.active_tab()?;
+
+    assert_eq!(intent, Some(CommandIntent::Command("new-space Research".to_string())));
+    assert_eq!(snapshot.spaces.len(), 2);
+    assert_eq!(snapshot.active_space_name, "Research");
+    assert_eq!(snapshot.tabs.len(), 1);
+    assert_eq!(snapshot.tabs[0].space_id(), &snapshot.active_space_id);
+    assert_eq!(active_tab.url().as_str(), "ely://new-tab");
+    assert_eq!(snapshot.command_query, "");
+    Ok(())
+}
+
 #[test]
 fn close_tab_command_closes_active_tab() -> Result<(), Box<dyn Error>> {
     let mut core = BrowserCore::new(InitialBrowserConfig::ely_defaults()?)?;
diff --git a/crates/ely_browser_core/tests/tabs.rs b/crates/ely_browser_core/tests/tabs.rs
index f385970..bf170c6 100644
--- a/crates/ely_browser_core/tests/tabs.rs
+++ b/crates/ely_browser_core/tests/tabs.rs
@@ -244,6 +244,56 @@ fn search_command_opens_default_search_url() -> Result<(), Box<dyn Error>> {
     Ok(())
 }
 
+#[test]
+fn switching_spaces_restores_each_space_active_tab() -> Result<(), Box<dyn Error>> {
+    let mut core = BrowserCore::new(InitialBrowserConfig::ely_defaults()?)?;
+    let work_snapshot = core.snapshot()?;
+    let work_space_id = work_snapshot.active_space_id;
+    let work_tab_id = work_snapshot.active_tab_id;
+
+    let research_space_id = core.create_space("Research", "R", 0xf54e00)?;
+    let research_new_tab_id = core.active_tab()?.id().clone();
+    let servo_tab_id = core.open_tab(UrlText::parse("https://servo.org")?);
+
+    core.select_space(&work_space_id)?;
+    let work_snapshot = core.snapshot()?;
+
+    assert_eq!(work_snapshot.active_tab_id, work_tab_id);
+    assert_eq!(work_snapshot.active_space_id, work_space_id);
+    assert_eq!(work_snapshot.tabs.len(), 1);
+    assert_eq!(work_snapshot.tabs[0].id(), &work_tab_id);
+
+    core.select_space(&research_space_id)?;
+    let research_snapshot = core.snapshot()?;
+    let research_ids =
+        research_snapshot.tabs.iter().map(|tab| tab.id().clone()).collect::<Vec<_>>();
+
+    assert_eq!(research_snapshot.active_tab_id, servo_tab_id);
+    assert_eq!(research_snapshot.active_space_id, research_space_id);
+    assert_eq!(research_ids, vec![research_new_tab_id, servo_tab_id]);
+    Ok(())
+}
+
+#[test]
+fn closing_active_tab_selects_neighbor_in_same_space() -> Result<(), Box<dyn Error>> {
+    let mut core = BrowserCore::new(InitialBrowserConfig::ely_defaults()?)?;
+    let work_tab_id = core.active_tab()?.id().clone();
+    core.create_space("Research", "R", 0xf54e00)?;
+    let research_tab_id = core.active_tab()?.id().clone();
+    let servo_tab_id = core.open_tab(UrlText::parse("https://servo.org")?);
+
+    let active_tab_id = core.close_active_tab()?;
+    let snapshot = core.snapshot()?;
+
+    assert_eq!(active_tab_id, research_tab_id);
+    assert_eq!(snapshot.active_tab_id, research_tab_id);
+    assert_eq!(snapshot.tabs.len(), 1);
+    assert_eq!(snapshot.tabs[0].id(), &research_tab_id);
+    assert!(snapshot.tabs.iter().all(|tab| tab.id() != &work_tab_id));
+    assert_eq!(snapshot.archived_tabs[0].tab().id(), &servo_tab_id);
+    Ok(())
+}
+
 #[test]
 fn toggles_active_tab_favorite() -> Result<(), Box<dyn Error>> {
     let mut core = BrowserCore::new(InitialBrowserConfig::ely_defaults()?)?;
diff --git a/docs/ui-shell.md b/docs/ui-shell.md
index 97299c4..5a80efb 100644
--- a/docs/ui-shell.md
+++ b/docs/ui-shell.md
@@ -9,10 +9,11 @@
 │ Pinned                       │                                               │
 │   [pin] New Tab              │                                               │
 │ Space                        │  ┌─────────────────────────────────────────┐  │
-│   Work                       │  │ New Tab                                 │  │
-│                              │  │ Clean browser surface for the current   │  │
-│ Tabs                         │  │ Space and Profile.                      │  │
-│   ● New Tab                  │  └─────────────────────────────────────────┘  │
+│   W Work                     │  │ New Tab                                 │  │
+│   R Research                 │  │ Clean browser surface for the current   │  │
+│                              │  │ Space and Profile.                      │  │
+│ Tabs                         │  └─────────────────────────────────────────┘  │
+│   ● New Tab                  │                                               │
 │ Archive                      │                                               │
 │   ↶ servo.org                │                                               │
 │                              │                                               │
@@ -21,6 +22,6 @@
 └──────────────────────────────┴───────────────────────────────────────────────┘
 ```
 
-Motion register: productive. Command, tab, and archive restore interactions use immediate state
-changes with hover/press feedback through GPUI styles; future pane transitions should use
+Motion register: productive. Command, space, tab, and archive restore interactions use immediate
+state changes with hover/press feedback through GPUI styles; future pane transitions should use
 transform/opacity and respect reduced-motion settings.