Initial commit: Luminary AI Gateway

OpenAI-compatible AI gateway with Vue admin UI, multi-provider egress,
ingress key governance, monitoring, and security controls.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/prediction/binding.go

@@ -0,0 +1,57 @@
+package prediction
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type NodeField struct {
+	Node  string `json:"node"`
+	Field string `json:"field"`
+}
+
+type InputBinding map[string]*NodeField
+
+func ParseBinding(raw string) (InputBinding, error) {
+	if raw == "" {
+		return InputBinding{}, nil
+	}
+	var b InputBinding
+	if err := json.Unmarshal([]byte(raw), &b); err != nil {
+		return nil, err
+	}
+	return b, nil
+}
+
+func (b InputBinding) Validate(workflow map[string]any, required []string) error {
+	for _, name := range required {
+		f, ok := b[name]
+		if !ok || f == nil || f.Node == "" || f.Field == "" {
+			return fmt.Errorf("required binding missing: %s", name)
+		}
+	}
+	for name, f := range b {
+		if f == nil || f.Node == "" || f.Field == "" {
+			continue
+		}
+		if err := validateNodeField(workflow, f.Node, f.Field); err != nil {
+			return fmt.Errorf("binding %s: %w", name, err)
+		}
+	}
+	return nil
+}
+
+func validateNodeField(workflow map[string]any, nodeID, field string) error {
+	node, ok := workflow[nodeID].(map[string]any)
+	if !ok {
+		return fmt.Errorf("node %s not found", nodeID)
+	}
+	inputs, ok := node["inputs"].(map[string]any)
+	if !ok {
+		return fmt.Errorf("node %s has no inputs", nodeID)
+	}
+	if _, ok := inputs[field]; !ok {
+		return fmt.Errorf("field %s not found on node %s", field, nodeID)
+	}
+	return nil
+}