diff --git a/cmd/indexer/main.go b/cmd/indexer/main.go
index 4b66838..731bf2c 100644
--- a/cmd/indexer/main.go
+++ b/cmd/indexer/main.go
@@ -427,11 +427,20 @@ func indexProse(sugar *zap.SugaredLogger, tsClient *typesense.Client, mongoDB *r
 			content = joinParagraphs(strs)
 		}
 
-		// Build URL: KB uses /books/kb/{volume}/{slug}, others use /books/{book}/{slug}
+		// Build URL: KB uses /books/kb/{volume}/{slug}; chapter summaries map
+		// their "<lila>-<n>" slug to the chapter landing page; others use
+		// /books/{book}/{slug}.
 		var proseURL string
-		if book == "kb" {
+		switch {
+		case book == "kb":
 			proseURL = fmt.Sprintf("/books/kb/%d/%s", volume, slug)
-		} else {
+		case docType == "chapter-summary":
+			if parts := strings.SplitN(slug, "-", 2); len(parts) == 2 {
+				proseURL = fmt.Sprintf("/books/%s/%s/%s", book, parts[0], parts[1])
+			} else {
+				proseURL = fmt.Sprintf("/books/%s/%s", book, slug)
+			}
+		default:
 			proseURL = fmt.Sprintf("/books/%s/%s", book, slug)
 		}
 
diff --git a/cmd/seed-book-intro/main.go b/cmd/seed-book-intro/main.go
index a704528..b5a55d9 100644
--- a/cmd/seed-book-intro/main.go
+++ b/cmd/seed-book-intro/main.go
@@ -35,14 +35,17 @@ type introSegment struct {
 	Type       string   `json:"type"`
 	Book       string   `json:"book"`
 	Volume     int      `json:"volume"`
+	Chapter    int      `json:"chapter"`
 	Order      int      `json:"order"`
 	Paragraphs []string `json:"paragraphs"`
 }
 
 func main() {
 	book := flag.String("book", "", "book code (e.g. bg, cc) — required")
-	dir := flag.String("dir", "", "directory of intro-segment JSON files "+
-		"(default: ../extractor/jsons/books/<book>/intro)")
+	segType := flag.String("type", "intro-segment",
+		"prose_chapters type to seed (intro-segment | chapter-summary)")
+	dir := flag.String("dir", "", "directory of segment JSON files "+
+		"(default: ../extractor/jsons/books/<book>/<intro|chapter-summaries>)")
 	flag.Parse()
 
 	if *book == "" {
@@ -51,7 +54,11 @@ func main() {
 	}
 	segDir := *dir
 	if segDir == "" {
-		segDir = filepath.Join("..", "extractor", "jsons", "books", *book, "intro")
+		sub := "intro"
+		if *segType == "chapter-summary" {
+			sub = "chapter-summaries"
+		}
+		segDir = filepath.Join("..", "extractor", "jsons", "books", *book, sub)
 	}
 
 	cfg, err := config.Load()
@@ -93,7 +100,7 @@ func main() {
 		if err := json.Unmarshal(raw, &seg); err != nil {
 			sugar.Fatalf("parse %s: %v", name, err)
 		}
-		if seg.Book != *book || seg.Type != "intro-segment" {
+		if seg.Book != *book || seg.Type != *segType {
 			sugar.Warnf("skipping %s (book=%q type=%q)", name, seg.Book, seg.Type)
 			continue
 		}
@@ -101,7 +108,7 @@ func main() {
 	}
 
 	if len(segments) == 0 {
-		sugar.Fatalf("no %s intro-segments found in %s", *book, segDir)
+		sugar.Fatalf("no %s %s docs found in %s", *book, *segType, segDir)
 	}
 
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
@@ -111,22 +118,26 @@ func main() {
 
 	del, err := col.DeleteMany(ctx, map[string]any{
 		"book": *book,
-		"type": "intro-segment",
+		"type": *segType,
 	})
 	if err != nil {
-		sugar.Fatalf("delete existing %s intro-segments: %v", *book, err)
+		sugar.Fatalf("delete existing %s %s docs: %v", *book, *segType, err)
 	}
-	sugar.Infof("removed %d existing %s intro-segment(s)", del.DeletedCount, *book)
+	sugar.Infof("removed %d existing %s %s doc(s)", del.DeletedCount, *book, *segType)
 
 	docs := make([]any, 0, len(segments))
 	for _, seg := range segments {
-		// chapter is null for intro-segments (matches the ProseChapterDoc shape).
+		// chapter is null unless the segment carries one (chapter-summaries do).
+		var chapter any
+		if seg.Chapter > 0 {
+			chapter = seg.Chapter
+		}
 		docs = append(docs, map[string]any{
 			"book":       *book,
 			"volume":     0,
-			"chapter":    nil,
+			"chapter":    chapter,
 			"title":      seg.Title,
-			"type":       "intro-segment",
+			"type":       *segType,
 			"slug":       seg.Slug,
 			"order":      seg.Order,
 			"paragraphs": seg.Paragraphs,
@@ -136,7 +147,7 @@ func main() {
 
 	res, err := col.InsertMany(ctx, docs)
 	if err != nil {
-		sugar.Fatalf("insert %s intro-segments: %v", *book, err)
+		sugar.Fatalf("insert %s %s docs: %v", *book, *segType, err)
 	}
-	sugar.Infof("inserted %d %s intro-segment(s)", len(res.InsertedIDs), *book)
+	sugar.Infof("inserted %d %s %s doc(s)", len(res.InsertedIDs), *book, *segType)
 }