The agent hands the gate the repository a node loads its weights by

sf3d's first jobs failed with a 401 from stabilityai/stable-fast-3d. The
weights were on the node, and the gate links them into the Hugging Face
cache when told the repository — but the agent passed on only the custom
nodes, so nothing was linked and the node went to the network for a gated
repository.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/agent/engines/comfyui.go

@@ -124,10 +124,15 @@ func (c *ComfyUI) Commands(s ShardSpec) ([]Command, error) {
 	if s.APIKey != "" {
 		env["LLMGW_ENGINE_KEY"] = s.APIKey
 	}
-	// A model's custom nodes, which only the catalog sets — a profile's env
-	// may not name the variable — and so taken before baseEnv drops it.
-	if nodes := p.Env[comfyNodesEnv]; nodes != "" {
-		env[comfyNodesEnv] = nodes
+	// A model's custom nodes and the repository a node loads its weights by,
+	// which only the catalog sets — a profile's env may not name them — and
+	// so taken before baseEnv drops them. Without the repository the gate
+	// links no Hugging Face cache, and sf3d's node went to the network for
+	// its gated repository and was refused with a 401.
+	for _, k := range []string{comfyNodesEnv, comfyHFRepoEnv} {
+		if v := p.Env[k]; v != "" {
+			env[k] = v
+		}
 	}
 	return []Command{{Name: "comfyui", Path: bin, Args: args, Env: materializeEnv(env)}}, nil
 }
@@ -135,3 +140,7 @@ func (c *ComfyUI) Commands(s ShardSpec) ([]Command, error) {
 // comfyNodesEnv is the custom nodes the catalog gives a ComfyUI model, as
 // JSON; catalog.NodesEnv and comfy.NodesEnv by the same name.
 const comfyNodesEnv = "LLMGW_COMFYUI_NODES"
+
+// comfyHFRepoEnv is the repository a custom node loads the weights by name
+// from; catalog.HFRepoEnv and comfy.HFRepoEnv by the same name.
+const comfyHFRepoEnv = "LLMGW_COMFYUI_HF_REPO"

internal/agent/engines/comfyui_test.go

@@ -33,6 +33,25 @@ func TestComfyUIRunsBehindTheGateWithItsKeyOutOfSight(t *testing.T) {
 	}
 }
 
+func TestTheGateIsToldTheNodesAndTheRepositoryTheCatalogGives(t *testing.T) {
+	// The repository was dropped on the way: sf3d's node went to the network
+	// for its gated repository, with no cache linked, and got a 401.
+	c := &ComfyUI{cfg: ComfyUIConfig{Dir: "/opt/comfyui"}}
+	cmds, err := c.Commands(ShardSpec{
+		ReplicaID: "r-sf3d-1", HTTPPort: 8100, BindAddr: "10.0.0.147", GPUIndices: []int{0},
+		Profile: Profile{Name: "p", Engine: "comfyui", ModelPath: "/w/sf3d/", ServedModelName: "sf3d",
+			Env: map[string]string{comfyNodesEnv: `[{"repo":"x"}]`, comfyHFRepoEnv: "stabilityai/stable-fast-3d"}},
+	})
+	if err != nil || len(cmds) != 1 {
+		t.Fatalf("%v %v", cmds, err)
+	}
+	for _, want := range []string{comfyNodesEnv + `=[{"repo":"x"}]`, comfyHFRepoEnv + "=stabilityai/stable-fast-3d"} {
+		if !slices.Contains(cmds[0].Env, want) {
+			t.Errorf("%q not in the gate's environment", want)
+		}
+	}
+}
+
 func TestComfyUIRunsOnOneCard(t *testing.T) {
 	c := &ComfyUI{}
 	if err := c.Validate(Profile{Name: "p", ModelPath: "/w", TP: 2}, h100(2)); err == nil {