feat: emit layout update events for runtime layout changes

1 files changed, 12 insertions, 3 deletions

diff --git a/src/api/schema/events.rs b/src/api/schema/events.rs
index 2fbce4d0..aff3d2a2 100644
--- a/src/api/schema/events.rs
+++ b/src/api/schema/events.rs
@@ -72,6 +72,8 @@ pub enum Subscription {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         agent_status: Option<AgentStatus>,
     },
+    #[serde(rename = "layout.updated")]
+    LayoutUpdated {},
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, schemars::JsonSchema)]
@@ -204,6 +206,7 @@ pub enum EventKind {
     PaneExited,
     PaneAgentDetected,
     PaneAgentStatusChanged,
+    LayoutUpdated,
 }
 
 impl EventKind {
@@ -231,6 +234,7 @@ impl EventKind {
             EventKind::PaneExited => "pane.exited",
             EventKind::PaneAgentDetected => "pane.agent_detected",
             EventKind::PaneAgentStatusChanged => "pane.agent_status_changed",
+            EventKind::LayoutUpdated => "layout.updated",
         }
     }
 }
@@ -259,6 +263,7 @@ pub const KNOWN_EVENT_KINDS: &[EventKind] = &[
     EventKind::PaneExited,
     EventKind::PaneAgentDetected,
     EventKind::PaneAgentStatusChanged,
+    EventKind::LayoutUpdated,
 ];
 
 pub const PLUGIN_HOOK_EVENT_KINDS: &[EventKind] = &[
@@ -325,14 +330,15 @@ mod known_event_name_tests {
     }
 
     #[test]
-    fn plugin_hook_event_names_exclude_unemitted_output_change() {
+    fn plugin_hook_event_names_exclude_high_volume_events() {
         let names = plugin_hook_event_names();
         assert!(!names.contains(&"pane.output_changed"));
+        assert!(!names.contains(&"layout.updated"));
         assert!(names.contains(&"pane.moved"));
     }
 }
 
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, schemars::JsonSchema)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, schemars::JsonSchema)]
 pub struct EventEnvelope {
     pub event: EventKind,
     pub data: EventData,
@@ -383,7 +389,7 @@ pub struct PaneAgentStatusChangedEvent {
     pub state_labels: HashMap<String, String>,
 }
 
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, schemars::JsonSchema)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, schemars::JsonSchema)]
 #[serde(tag = "type", rename_all = "snake_case")]
 pub enum EventData {
     WorkspaceCreated {
@@ -502,4 +508,7 @@ pub enum EventData {
         #[serde(default, skip_serializing_if = "HashMap::is_empty")]
         state_labels: HashMap<String, String>,
     },
+    LayoutUpdated {
+        layout: super::panes::PaneLayoutSnapshot,
+    },
 }