diff --git a/docs/admin-api.openapi.json b/docs/admin-api.openapi.json
index 61db5aa..46efe7e 100644
--- a/docs/admin-api.openapi.json
+++ b/docs/admin-api.openapi.json
@@ -7661,6 +7661,10 @@
             "type": "boolean",
             "description": "Auto is whether a preset is added when a node fits it and the catalog has no model that makes what it makes (presets.auto)."
           },
+          "comfyui": {
+            "type": "string",
+            "description": "ComfyUI is engines.comfyui as it stands: the version the nodes install, \"\" for none — in which case adding a preset sets it, and the control planes start again on that."
+          },
           "presets": {
             "type": "array",
             "items": {
diff --git a/internal/control/adminapi/presets.go b/internal/control/adminapi/presets.go
index 1caaf6e..17454cb 100644
--- a/internal/control/adminapi/presets.go
+++ b/internal/control/adminapi/presets.go
@@ -22,7 +22,11 @@ import (
 type PresetsView struct {
 	// Auto is whether a preset is added when a node fits it and the catalog
 	// has no model that makes what it makes (presets.auto).
-	Auto    bool         `json:"auto"`
+	Auto bool `json:"auto"`
+	// ComfyUI is engines.comfyui as it stands: the version the nodes
+	// install, "" for none — in which case adding a preset sets it, and the
+	// control planes start again on that.
+	ComfyUI string       `json:"comfyui"`
 	Presets []PresetView `json:"presets"`
 }
 
@@ -96,7 +100,7 @@ func (a *API) Presets(ctx context.Context) (PresetsView, error) {
 	cfg := a.presetCfg()
 	cat := a.ctl.Catalog()
 	kinds := a.gpuKinds()
-	out := PresetsView{Auto: cfg.Auto}
+	out := PresetsView{Auto: cfg.Auto, ComfyUI: cfg.ComfyUI}
 	for _, p := range catalog.Presets() {
 		v := PresetView{Name: p.Model.Name, Makes: p.Makes, Description: p.Model.Description,
 			Card: presetCard(p.Model), FitsClasses: presetFits(p.Model, kinds)}
diff --git a/internal/control/adminapi/presets_test.go b/internal/control/adminapi/presets_test.go
index e9d333d..f784fc0 100644
--- a/internal/control/adminapi/presets_test.go
+++ b/internal/control/adminapi/presets_test.go
@@ -80,6 +80,9 @@ func TestAPresetIsNotAddedByItselfWhereItShouldNotBe(t *testing.T) {
 			if err != nil {
 				t.Fatal(err)
 			}
+			if v.ComfyUI != c.cfg.ComfyUI {
+				t.Errorf("comfyui %q", v.ComfyUI)
+			}
 			for _, p := range v.Presets {
 				if why, ok := c.want[p.Name]; ok && !strings.Contains(p.Blocked, why) {
 					t.Errorf("%s blocked %q, want it to say %q", p.Name, p.Blocked, why)