Add strict custom field registry

toolkit/cmd/gsp/main.go

@@ -42,6 +42,8 @@ func run(args []string) error {
 		return runValidate(args[1:])
 	case "index":
 		return runIndex(args[1:])
+	case "fields":
+		return runFields(args[1:])
 	case "trace":
 		return runTrace(args[1:])
 	case "flatten":
@@ -77,6 +79,7 @@ Usage:
   gsp completion install powershell
   gsp validate [--root .] [--out report.json]
   gsp index [--root .] [--out index.json]
+  gsp fields list|validate [--root .] [--out fields.json]
   gsp trace <id> [--root .] [--depth 3] [--out trace.json]
   gsp flatten <id> [--root .] [--depth 3] [--include-type a,b] [--exclude-type a,b] [--out flattened.json]
   gsp pack <id> [--root .] [--for implement] [--stage implement] [--depth 3] [--budget 12000] [--format json|md|canvas] [--out context-pack.json]
@@ -88,6 +91,53 @@ Usage:
 `)
 }
 
+func runFields(args []string) error {
+	if len(args) == 0 {
+		return fmt.Errorf("fields requires list or validate")
+	}
+	switch args[0] {
+	case "list":
+		return runFieldsList(args[1:])
+	case "validate":
+		return runFieldsValidate(args[1:])
+	default:
+		return fmt.Errorf("unknown fields command %q", args[0])
+	}
+}
+
+func runFieldsList(args []string) error {
+	fs := flag.NewFlagSet("fields list", flag.ContinueOnError)
+	root := commonRoot(fs)
+	out := commonOut(fs)
+	if err := fs.Parse(args); err != nil {
+		return err
+	}
+	project, err := gsp.LoadProject(*root)
+	if err != nil {
+		return err
+	}
+	if project.Fields == nil {
+		return writeJSON(*out, map[string]any{"gspFieldsVersion": gsp.FieldsVersion, "fields": map[string]any{}})
+	}
+	return writeJSON(*out, project.Fields)
+}
+
+func runFieldsValidate(args []string) error {
+	fs := flag.NewFlagSet("fields validate", flag.ContinueOnError)
+	root := commonRoot(fs)
+	out := commonOut(fs)
+	if err := fs.Parse(args); err != nil {
+		return err
+	}
+	project, err := gsp.LoadProject(*root)
+	if err != nil {
+		return err
+	}
+	report := gsp.Report{OK: true}
+	project.ValidateFieldRegistryOnly(&report)
+	return writeReport(*out, report)
+}
+
 func runLinks(args []string) error {
 	fs := flag.NewFlagSet("links", flag.ContinueOnError)
 	root := commonRoot(fs)