Capture prompt requirement metadata and templates

internal/prompt/template.go

@@ -9,6 +9,22 @@ type CompiledTemplates struct {
 	Messages []*template.Template
 }
 
+// InputMetadata is the captured declaration metadata for one prompt input.
+// Nil metadata pointers mean the corresponding field was absent or null.
+type InputMetadata struct {
+	Name        string
+	Required    bool
+	ContentType *string
+	Description *string
+}
+
+// RequirementSnapshot provides the captured syntax and declarations needed
+// for requirement inspection without reopening prompt resources.
+type RequirementSnapshot struct {
+	Templates CompiledTemplates
+	Inputs    []InputMetadata
+}
+
 // TemplateLookup provides parsed templates for a captured prompt identity.
 type TemplateLookup interface {
 	GetCompiledTemplates(id, version string) (CompiledTemplates, bool)