fix

apps/api/internal/processing/formula_prompt.go

@@ -191,7 +191,16 @@ func titleFormulaAttrKeys(template any) []string {
 
 // FormatTitleFormulaConstraint turns categories.title_template into enhance-prompt
 // constraints (element order: literal text + attribute variable keys).
+//
+// Brand-only stubs ({elements:[brand]}, the shape an older A1 migration wrote onto
+// every category) are not a formula: instructing "name = brand" yields a
+// brand-only title that the title picker then rejects in favour of the supplier
+// name — an LLM call spent to reproduce the feed. Treat them as absent so the
+// category prompt / built-in retail rules drive the name instead.
 func FormatTitleFormulaConstraint(template any) string {
+	if aiprompts.TitleTemplateIsBrandOnly(template) {
+		return ""
+	}
 	elements, separator, ok := parseTitleFormula(template)
 	if !ok || len(elements) == 0 {
 		return ""
@@ -521,6 +530,31 @@ func categoryFormulasFor(in ProductInput, category string) (title, description a
 	return f.TitleTemplate, f.DescriptionTemplate
 }
 
+// effectiveDescriptionTemplateFor resolves the description formula RunSteps should
+// judge a category's copy against: the category's own template, else one derived
+// from its prompt, else the platform default. Mirrors what e.enhance renders, so
+// the final repair pass cannot demand a different formula than the one the model
+// was given.
+func effectiveDescriptionTemplateFor(in ProductInput, out StepResult) any {
+	category := strings.TrimSpace(out.Category)
+	_, descTpl := categoryFormulasFor(in, category)
+	catPrompt := strings.TrimSpace(in.CategoryEnhancePrompt)
+	if catPrompt == "" {
+		catPrompt = categoryEnhancePromptFor(in.CategoryPromptsByLang, category, in.Language, in.Language)
+	}
+	if effective := aiprompts.EffectiveDescriptionTemplateAny(descTpl, catPrompt); effective != nil {
+		return effective
+	}
+	if catPrompt != "" || descTpl != nil {
+		return descTpl
+	}
+	probe := ProductInput{
+		CategoryUniqueID:    category,
+		CategoryDisplayName: categoryDisplayLabel(out),
+	}
+	return withDefaultCategoryFormula(probe).DescriptionTemplate
+}
+
 func asObjectMap(v any) (map[string]any, error) {
 	switch t := v.(type) {
 	case map[string]any: