Surface chapter kind through the MCP server

create_chapter/update_chapter now pass kind through to the API,
matching the FrontMatter/Body/BackMatter option added to the embedded
agent's toolset.

src/Novelly.Mcp/Tools/ManuscriptTools.cs

@@ -24,13 +24,15 @@ public static class ManuscriptTools
         api.GetAsync($"/api/chapters/{chapterId}", ct);
 
     [McpServerTool(Name = "create_chapter")]
-    [Description("Add a chapter to a novel. It goes at the end of the manuscript unless you supply a number.")]
+    [Description("Add a chapter to a novel. It goes at the end of the manuscript unless you supply a number. "
+                 + "Use 'kind' for a foreword, prologue, afterword, or other unnumbered front/back matter.")]
     public static Task<CallToolResult> CreateChapter(
         NovelApiClient api,
         [Description("The novel's id.")] Guid novelId,
         [Description("Chapter title.")] string title,
         CancellationToken ct,
-        [Description("Position in the manuscript, 1-based.")] int? number = null,
+        [Description("Manuscript position, 1-based, counting front and back matter.")] int? number = null,
+        [Description("FrontMatter, Body, or BackMatter. Defaults to Body.")] string? kind = null,
         [Description("The chapter's outline summary paragraph.")] string? summary = null,
         [Description("Where and when the chapter takes place. Unknown locations are created.")] string[]? locations = null,
         [Description("Planned, Outlined, Drafted, Revised or Final.")] string? status = null,
@@ -41,6 +43,7 @@ public static class ManuscriptTools
         {
             title,
             number,
+            kind = kind ?? "Body",
             summary,
             locations,
             status = status ?? "Planned",
@@ -50,7 +53,7 @@ public static class ManuscriptTools
         }, ct);
 
     [McpServerTool(Name = "update_chapter")]
-    [Description("Revise a chapter's title, number, summary, locations, notes, status "
+    [Description("Revise a chapter's title, number, kind, summary, locations, notes, status "
                  + "or drafted prose. Use 'prose' to write or replace the chapter's draft text in "
                  + "markdown; the word count is recomputed automatically.")]
     public static Task<CallToolResult> UpdateChapter(
@@ -58,7 +61,8 @@ public static class ManuscriptTools
         [Description("The chapter's id.")] Guid chapterId,
         CancellationToken ct,
         [Description("New title.")] string? title = null,
-        [Description("Position in the manuscript.")] int? number = null,
+        [Description("Manuscript position, 1-based, counting front and back matter.")] int? number = null,
+        [Description("FrontMatter, Body, or BackMatter.")] string? kind = null,
         [Description("The chapter's outline summary paragraph.")] string? summary = null,
         [Description("Where and when the chapter takes place. Replaces the existing locations. Unknown locations are created.")] string[]? locations = null,
         [Description("Anything else worth recording.")] string? notes = null,
@@ -67,5 +71,5 @@ public static class ManuscriptTools
         [Description("The chapter's drafted text, in markdown.")] string? prose = null,
         [Description("Tags for cross-referencing. Replaces the existing tags.")] string[]? tags = null) =>
         api.PatchAsync($"/api/chapters/{chapterId}",
-            new { title, number, summary, locations, notes, status, targetWordCount, prose, tags }, ct);
+            new { title, number, kind, summary, locations, notes, status, targetWordCount, prose, tags }, ct);
 }