Share prompt instructions and simplify validation helpers

internal/framework/validators/llm_context.go

@@ -8,39 +8,29 @@ import (
 // validationContext supplies adjacent source segments within the current chunk
 // and glossary definitions mentioned in the candidate or that local context.
 // These fields travel in each item so batching accounts for their size.
-func validationContext(req Request, segmentID int, corrected string) ([]NeighboringSegment, []schema.GlossaryEntry) {
+func validationContext(segments []schema.Segment, position int, glossary *schema.Glossary, vocabulary ProtectedVocabulary, corrected string) ([]NeighboringSegment, []schema.GlossaryEntry) {
 	var neighbors []NeighboringSegment
-	var source string
-	if req.WorkingTranscript != nil {
-		segments := req.WorkingTranscript.Segments
-		for i, segment := range segments {
-			if segment.ID != segmentID {
-				continue
-			}
-			source = segment.Text
-			if i > 0 {
-				neighbors = append(neighbors, neighboringSegment("preceding", segments[i-1]))
-			}
-			if i+1 < len(segments) {
-				neighbors = append(neighbors, neighboringSegment("following", segments[i+1]))
-			}
-			break
-		}
+	source := segments[position].Text
+	if position > 0 {
+		neighbors = append(neighbors, neighboringSegment("preceding", segments[position-1]))
 	}
+	if position+1 < len(segments) {
+		neighbors = append(neighbors, neighboringSegment("following", segments[position+1]))
+	}
+
 	texts := []string{source, corrected}
 	for _, neighbor := range neighbors {
 		texts = append(texts, neighbor.Text)
 	}
 	var entries []schema.GlossaryEntry
-	if req.Glossary != nil {
-		vocabulary := NewProtectedVocabulary(req.Glossary)
+	if glossary != nil {
 		mentioned := make(map[int]bool)
 		for _, text := range texts {
 			for identity := range vocabulary.occurrencesByIdentity(text) {
 				mentioned[identity] = true
 			}
 		}
-		for i, entry := range req.Glossary.Entries {
+		for i, entry := range glossary.Entries {
 			if mentioned[i] {
 				entries = append(entries, entry)
 			}