From eaf2539cb4f820ebe8f98564615d41c4a827c8c9 Mon Sep 17 00:00:00 2001
From: Katie Geer <katie@zed.dev>
Date: Wed, 1 Apr 2026 11:48:43 -0700
Subject: [PATCH] Add sidebar toggle, agent panel side, and workspace telemetry
 events
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Track three new telemetry signals:

- 'Sidebar Toggled' fires in MultiWorkspace::open_sidebar and
  close_sidebar with action ('open'/'close') and side ('left'/'right').
  Covers both mouse (status bar button / sidebar close button) and
  keyboard (ToggleWorkspaceSidebar / CloseWorkspaceSidebar actions)
  since all paths funnel through those two methods.

- 'Agent Panel Side Changed' fires in AgentPanel::set_position with
  the new side value. This fires whenever the user moves the panel
  via drag or the context menu.

- 'Workspace Added' fires in MultiWorkspace::add — which is only called
  during initial workspace restoration, not for user-initiated project
  opens — with workspace_count so we can understand portfolio size at
  session start.

- 'Sidebar Open Project Clicked' fires on the empty-state 'Open Project'
  button in the sidebar with the current side value.
---
 Cargo.lock                              |  1 +
 crates/agent_ui/src/agent_panel.rs      |  5 +++++
 crates/sidebar/Cargo.toml               |  1 +
 crates/sidebar/src/sidebar.rs           |  6 ++++++
 crates/workspace/src/multi_workspace.rs | 14 ++++++++++++++
 5 files changed, 27 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index f744c9bc2d66b54cdbfdea63aa56a5b3bf6d365d..a553927c40cf56e95cf10551ea8f57b4c581bdcb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -16093,6 +16093,7 @@ dependencies = [
  "serde",
  "serde_json",
  "settings",
+ "telemetry",
  "theme",
  "theme_settings",
  "ui",
diff --git a/crates/agent_ui/src/agent_panel.rs b/crates/agent_ui/src/agent_panel.rs
index 8f51204b14e67248b8857afcc3001750536eb859..9589d37d8ae2786053bb450a117608df52de73bf 100644
--- a/crates/agent_ui/src/agent_panel.rs
+++ b/crates/agent_ui/src/agent_panel.rs
@@ -3344,6 +3344,11 @@ impl Panel for AgentPanel {
     }
 
     fn set_position(&mut self, position: DockPosition, _: &mut Window, cx: &mut Context<Self>) {
+        let side = match position {
+            DockPosition::Left => "left",
+            _ => "right",
+        };
+        telemetry::event!("Agent Panel Side Changed", side = side);
         settings::update_settings_file(self.fs.clone(), cx, move |settings, _| {
             settings
                 .agent
diff --git a/crates/sidebar/Cargo.toml b/crates/sidebar/Cargo.toml
index 41bf8cdad2068f0c67c38ea06fd176af11f3d560..60e70464231e42cf29553ecebba67afaab394f84 100644
--- a/crates/sidebar/Cargo.toml
+++ b/crates/sidebar/Cargo.toml
@@ -35,6 +35,7 @@ remote.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 settings.workspace = true
+telemetry.workspace = true
 theme.workspace = true
 theme_settings.workspace = true
 ui.workspace = true
diff --git a/crates/sidebar/src/sidebar.rs b/crates/sidebar/src/sidebar.rs
index 6d9117fbd86b2273269b8d667e41ebaed13ca996..33c08e9d540ebab0c226ccede1c92ac8edf4d7fa 100644
--- a/crates/sidebar/src/sidebar.rs
+++ b/crates/sidebar/src/sidebar.rs
@@ -34,6 +34,7 @@ use settings::Settings as _;
 use std::collections::{HashMap, HashSet};
 use std::mem;
 use std::rc::Rc;
+use telemetry;
 use theme::ActiveTheme;
 use ui::{
     AgentThreadStatus, CommonAnimationExt, ContextMenu, Divider, HighlightedLabel, KeyBinding,
@@ -3521,6 +3522,11 @@ impl Sidebar {
                     .full_width()
                     .key_binding(KeyBinding::for_action(&workspace::Open::default(), cx))
                     .on_click(|_, window, cx| {
+                        let side = match AgentSettings::get_global(cx).sidebar_side() {
+                            SidebarSide::Left => "left",
+                            SidebarSide::Right => "right",
+                        };
+                        telemetry::event!("Sidebar Open Project Clicked", side = side);
                         window.dispatch_action(
                             Open {
                                 create_new_window: false,
diff --git a/crates/workspace/src/multi_workspace.rs b/crates/workspace/src/multi_workspace.rs
index fa4f29ecad1ef37852b779837c58e4925840bf23..596a3d2ac936411a53507062a75bbbbc8679cdb6 100644
--- a/crates/workspace/src/multi_workspace.rs
+++ b/crates/workspace/src/multi_workspace.rs
@@ -468,6 +468,11 @@ impl MultiWorkspace {
     }
 
     pub fn open_sidebar(&mut self, cx: &mut Context<Self>) {
+        let side = match self.sidebar_side(cx) {
+            SidebarSide::Left => "left",
+            SidebarSide::Right => "right",
+        };
+        telemetry::event!("Sidebar Toggled", action = "open", side = side);
         self.sidebar_open = true;
         if let ActiveWorkspace::Transient(workspace) = &self.active_workspace {
             let workspace = workspace.clone();
@@ -485,6 +490,11 @@ impl MultiWorkspace {
     }
 
     pub fn close_sidebar(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        let side = match self.sidebar_side(cx) {
+            SidebarSide::Left => "left",
+            SidebarSide::Right => "right",
+        };
+        telemetry::event!("Sidebar Toggled", action = "close", side = side);
         self.sidebar_open = false;
         for workspace in self.workspaces.iter() {
             workspace.update(cx, |workspace, _cx| {
@@ -861,7 +871,11 @@ impl MultiWorkspace {
     /// persistent list regardless of sidebar state — it's used for system-
     /// initiated additions like deserialization and worktree discovery.
     pub fn add(&mut self, workspace: Entity<Workspace>, window: &Window, cx: &mut Context<Self>) {
+        let is_new = !self.workspaces.iter().any(|w| *w == workspace);
         self.insert_workspace(workspace, window, cx);
+        if is_new {
+            telemetry::event!("Workspace Added", workspace_count = self.workspaces.len());
+        }
     }
 
     /// Ensures the workspace is in the multiworkspace and makes it the active one.