diff --git a/crates/codegen/kigi-tui/src/app/actions.rs b/crates/codegen/kigi-tui/src/app/actions.rs
index 12f27cd..97b3026 100644
--- a/crates/codegen/kigi-tui/src/app/actions.rs
+++ b/crates/codegen/kigi-tui/src/app/actions.rs
@@ -1431,6 +1431,8 @@ pub enum Effect {
     Compact {
         agent_id: AgentId,
         session_id: acp::SessionId,
+        /// `/compact <instructions>`, forwarded as `userContext`.
+        user_context: Option<String>,
     },
     /// Kill a background task.
     KillBgTask {
diff --git a/crates/codegen/kigi-tui/src/app/dispatch/queue.rs b/crates/codegen/kigi-tui/src/app/dispatch/queue.rs
index 4952893..6cc5af5 100644
--- a/crates/codegen/kigi-tui/src/app/dispatch/queue.rs
+++ b/crates/codegen/kigi-tui/src/app/dispatch/queue.rs
@@ -162,6 +162,12 @@ fn format_cron_prompt(prompt: &str, task_id: &str, human_schedule: &str) -> Stri
     kigi_tools::reminders::format_scheduled_task_prompt(prompt, task_id, human_schedule)
 }
 
+/// `/compact <instructions>` text from a queued command; a queue edit may leave leading whitespace.
+pub(super) fn compact_user_context(text: &str) -> Option<String> {
+    let inv = crate::slash::parse_invocation(text.trim_start())?;
+    let args = inv.args.trim();
+    (inv.token == "compact" && !args.is_empty()).then(|| args.to_string())
+}
 /// Try to send the next queued entry (prompt, command, bash, or cron) if the agent is idle.
 ///
 /// Called after enqueue operations and task completions to advance the queue.
@@ -392,10 +398,12 @@ pub(crate) fn maybe_drain_queue(agent: &mut AgentView) -> Vec<Effect> {
             agent.end_work_announced = false;
             agent.session.start_command(AgentCommand::Compact);
             agent.turn_started_at = Some(Instant::now());
+            let user_context = compact_user_context(&queued.text);
 
             vec![Effect::Compact {
                 agent_id,
                 session_id,
+                user_context,
             }]
         }
         QueueEntryKind::BashCommand => {
diff --git a/crates/codegen/kigi-tui/src/app/dispatch/tests/prompt.rs b/crates/codegen/kigi-tui/src/app/dispatch/tests/prompt.rs
index 124489a..d40594b 100644
--- a/crates/codegen/kigi-tui/src/app/dispatch/tests/prompt.rs
+++ b/crates/codegen/kigi-tui/src/app/dispatch/tests/prompt.rs
@@ -1810,7 +1810,13 @@ fn slash_compact_enqueues_command() {
     let effects = dispatch(Action::SendPrompt("/compact".into()), &mut app);
     // /compact enqueues as Command and drains immediately (agent was idle).
     assert_eq!(effects.len(), 1);
-    assert!(matches!(&effects[0], Effect::Compact { .. }));
+    assert!(matches!(
+        &effects[0],
+        Effect::Compact {
+            user_context: None,
+            ..
+        }
+    ));
     // Prompt should be cleared.
     assert!(app.agents[&id].prompt.text().is_empty());
 }
@@ -1853,6 +1859,19 @@ fn palette_dispatch_preserves_prompt_draft() {
     );
 }
 
+/// An edited queue row keeps its text verbatim, so leading whitespace must not drop the instructions.
+#[test]
+fn compact_user_context_survives_leading_whitespace_from_a_queue_edit() {
+    use crate::app::dispatch::queue::compact_user_context;
+    assert_eq!(
+        compact_user_context(" /compact focus on auth").as_deref(),
+        Some("focus on auth")
+    );
+    assert_eq!(compact_user_context("\n/compact  x ").as_deref(), Some("x"));
+    assert_eq!(compact_user_context("/compact"), None);
+    assert_eq!(compact_user_context("/other args"), None);
+}
+
 #[test]
 fn slash_compact_with_context_enqueues_command() {
     let mut app = test_app_with_agent();
@@ -1861,7 +1880,13 @@ fn slash_compact_with_context_enqueues_command() {
         &mut app,
     );
     assert_eq!(effects.len(), 1);
-    assert!(matches!(&effects[0], Effect::Compact { .. }));
+    assert!(matches!(
+        &effects[0],
+        Effect::Compact {
+            user_context: Some(ctx),
+            ..
+        } if ctx == "focus on auth"
+    ));
 }
 
 #[test]
diff --git a/crates/codegen/kigi-tui/src/app/effects/mod.rs b/crates/codegen/kigi-tui/src/app/effects/mod.rs
index ae71fc0..be84870 100644
--- a/crates/codegen/kigi-tui/src/app/effects/mod.rs
+++ b/crates/codegen/kigi-tui/src/app/effects/mod.rs
@@ -1388,13 +1388,18 @@ pub(crate) fn execute(
                     }
                 });
         }
-        Effect::Compact { agent_id, session_id } => {
+        Effect::Compact {
+            agent_id,
+            session_id,
+            user_context,
+        } => {
             let tx = acp_tx.clone();
             tasks
                 .spawn(async move {
-                    let params = serde_json::json!(
-                        { "sessionId" : session_id.0.to_string(), }
-                    );
+                    let params = serde_json::json!({
+                        "sessionId": session_id.0.to_string(),
+                        "userContext": user_context,
+                    });
                     let req = acp::ExtRequest::new(
                         "kigi/compact_conversation",
                         serde_json::value::to_raw_value(&params)