diff --git a/pkg/agentic/plan_retention.go b/pkg/agentic/plan_retention.go
index b80525b..b64f7fa 100644
--- a/pkg/agentic/plan_retention.go
+++ b/pkg/agentic/plan_retention.go
@@ -3,6 +3,7 @@
 package agentic
 
 import (
+	"context"
 	"sort"
 	"time"
 
@@ -10,6 +11,7 @@ import (
 )
 
 const planRetentionDefaultDays = 90
+const planRetentionScheduleInterval = 24 * time.Hour
 
 type PlanCleanupOutput struct {
 	Success  bool   `json:"success"`
@@ -55,6 +57,26 @@ func (s *PrepSubsystem) cmdPlanCleanup(options core.Options) core.Result {
 	return core.Result{Value: output, OK: true}
 }
 
+// ctx, cancel := context.WithCancel(context.Background())
+// go s.runPlanCleanupLoop(ctx, time.Minute)
+func (s *PrepSubsystem) runPlanCleanupLoop(ctx context.Context, interval time.Duration) {
+	if ctx == nil || interval <= 0 {
+		return
+	}
+
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-ticker.C:
+			s.planCleanup(core.NewOptions())
+		}
+	}
+}
+
 func (s *PrepSubsystem) planCleanup(options core.Options) core.Result {
 	days := planRetentionDays(options)
 	if days <= 0 {
diff --git a/pkg/agentic/plan_retention_test.go b/pkg/agentic/plan_retention_test.go
index 9fec9e7..bb6cfa9 100644
--- a/pkg/agentic/plan_retention_test.go
+++ b/pkg/agentic/plan_retention_test.go
@@ -3,6 +3,7 @@
 package agentic
 
 import (
+	"context"
 	"testing"
 	"time"
 
@@ -141,3 +142,43 @@ func TestPlanRetention_PlanArchivedAt_Good_FallsBackToFileModifiedTime(t *testin
 	_, ok := stat.Value.(interface{ ModTime() time.Time })
 	assert.True(t, ok)
 }
+
+func TestPlanRetention_RunPlanCleanupLoop_Good_DeletesExpiredPlans(t *testing.T) {
+	dir := t.TempDir()
+	t.Setenv("CORE_WORKSPACE", dir)
+
+	s := newTestPrep(t)
+
+	plan := &Plan{
+		ID:         "scheduled-plan-abc123",
+		Title:      "Scheduled Plan",
+		Status:     "archived",
+		Objective:  "Remove me on the next retention pass",
+		ArchivedAt: time.Now().AddDate(0, 0, -100),
+	}
+
+	_, err := writePlan(PlansRoot(), plan)
+	require.NoError(t, err)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	done := make(chan struct{})
+
+	go func() {
+		s.runPlanCleanupLoop(ctx, time.Millisecond)
+		close(done)
+	}()
+
+	require.Eventually(t, func() bool {
+		return !fs.Exists(core.JoinPath(PlansRoot(), "scheduled-plan-abc123.json"))
+	}, time.Second, 5*time.Millisecond)
+
+	cancel()
+	require.Eventually(t, func() bool {
+		select {
+		case <-done:
+			return true
+		default:
+			return false
+		}
+	}, time.Second, 5*time.Millisecond)
+}
diff --git a/pkg/agentic/prep.go b/pkg/agentic/prep.go
index 16e15c9..3fa88cf 100644
--- a/pkg/agentic/prep.go
+++ b/pkg/agentic/prep.go
@@ -257,6 +257,9 @@ func (s *PrepSubsystem) OnStartup(ctx context.Context) core.Result {
 	c.Action("agentic.complete", s.handleComplete).Description = "Run completion pipeline (QA → PR → Verify → Ingest → Poke) in background"
 
 	s.hydrateWorkspaces()
+	if planRetentionDays(core.NewOptions()) > 0 {
+		go s.runPlanCleanupLoop(ctx, planRetentionScheduleInterval)
+	}
 
 	c.RegisterQuery(s.handleWorkspaceQuery)