diff --git a/internal/store/migrations/103-index-discard-attention.sql b/internal/store/migrations/103-index-discard-attention.sql
new file mode 100644
index 0000000..e9e6d25
--- /dev/null
+++ b/internal/store/migrations/103-index-discard-attention.sql
@@ -0,0 +1,2 @@
+DROP INDEX events_attention;
+CREATE INDEX events_attention ON events(task_id) WHERE kind IN ('inbox.created', 'task.ready', 'session.error', 'session.rate_limited', 'task.discard_suggested');
diff --git a/internal/store/store.go b/internal/store/store.go
index 004a0db..3acabb6 100644
--- a/internal/store/store.go
+++ b/internal/store/store.go
@@ -1688,7 +1688,8 @@ const taskColumns = `id, project_id, title, merge_title, branch, worktree_path,
 // Keep the child lookup separate from the task itself so SQLite can use tasks_parent.
 const backgroundExpr = `(audit != '' OR EXISTS (SELECT 1 FROM tasks r WHERE r.id = tasks.parent_task_id AND tasks.workflow_stage != '' AND r.audit != ''))
 	AND NOT EXISTS (SELECT 1 FROM events WHERE events.task_id IN (SELECT tasks.id UNION ALL SELECT c.id FROM tasks c WHERE c.parent_task_id = tasks.id AND c.parent_task_id != '' AND tasks.workflow_name != '')
-		AND (kind IN ('inbox.created', 'task.ready', 'session.error', 'session.rate_limited')
+		AND kind IN ('inbox.created', 'task.ready', 'session.error', 'session.rate_limited', 'task.discard_suggested')
+		AND (kind != 'task.discard_suggested'
 			OR (kind = 'task.discard_suggested' AND NOT EXISTS (SELECT 1 FROM tasks r JOIN workflow_definitions d ON d.id = r.workflow_definition_id WHERE r.id IN (tasks.id, tasks.parent_task_id) AND d.auto_discard))))`
 
 const sessionColumns = `id, coalesce(task_id, ''), owner, vendor, model, vendor_session_id, state, role, member, created_by, created_at, forked_from, forked_at, subagents`