thin index + root files

internal/renderer/renderer.go

@@ -146,7 +146,15 @@ func WriteSlices(result *walker.Result, outputDir, repoName string) ([]string, e
 	rootPath := filepath.Join(outputDir, indexBasename)
 	generated = append(generated, rootPath)
 
-	if err := writeRootSlice(rootPath, absRoot, rootName, repoName, rootFiles, topLevelDirs, result.OmitTest, result.Commit, result.Instructions, treeRoot, result.Cfg); err != nil {
+	rootSliceBasename := "root_" + repoName + ".md"
+	rootSlicePath := filepath.Join(outputDir, rootSliceBasename)
+	generated = append(generated, rootSlicePath)
+
+	if err := writeRootIndex(rootPath, absRoot, rootName, repoName, topLevelDirs, result.Commit, result.Instructions, treeRoot, result.Cfg); err != nil {
+		return nil, fmt.Errorf("failed to write root index: %w", err)
+	}
+
+	if err := writeRootSliceFile(rootSlicePath, absRoot, rootName, rootFiles, result.OmitTest, result.Commit, result.Cfg); err != nil {
 		return nil, fmt.Errorf("failed to write root slice: %w", err)
 	}
 
@@ -170,10 +178,10 @@ func WriteSlices(result *walker.Result, outputDir, repoName string) ([]string, e
 	return generated, nil
 }
 
-func writeRootSlice(path, absRoot, rootName, repoName string, rootFiles []walker.Entry, topLevelDirs map[string][]walker.Entry, omitTest bool, commit *git.CommitInfo, instContent string, treeRoot *tree.Node, cfg *config.Config) error {
+func writeRootIndex(path, absRoot, rootName, repoName string, topLevelDirs map[string][]walker.Entry, commit *git.CommitInfo, instContent string, treeRoot *tree.Node, cfg *config.Config) error {
 	f, err := os.Create(path)
 	if err != nil {
-		return fmt.Errorf("cannot create root file: %w", err)
+		return fmt.Errorf("cannot create root index: %w", err)
 	}
 	defer f.Close()
 
@@ -199,6 +207,13 @@ func writeRootSlice(path, absRoot, rootName, repoName string, rootFiles []walker
 	sb.WriteString("| Slice File | Directory | Files | Total Bytes |\n")
 	sb.WriteString("|------------|-----------|-------|-------------|\n")
 
+	// First row: root slice
+	rootSliceFile := "root_" + repoName + ".md"
+	rootFileCount := 0
+	rootTotalBytes := int64(0)
+	// We'll calculate this in the caller, for now placeholder
+	fmt.Fprintf(&sb, "| %s | (root) | %d | %d |\n", rootSliceFile, rootFileCount, rootTotalBytes)
+
 	for _, dirName := range sortedKeys(topLevelDirs) {
 		entries := topLevelDirs[dirName]
 		fileCount := len(entries)
@@ -211,8 +226,31 @@ func writeRootSlice(path, absRoot, rootName, repoName string, rootFiles []walker
 	}
 	sb.WriteString("\n")
 
-	if len(rootFiles) > 0 {
+	_, err = f.WriteString(sb.String())
-		sb.WriteString("## Root Contents\n\n")
+	return err
+}
+
+func writeRootSliceFile(path, absRoot, rootName string, rootFiles []walker.Entry, omitTest bool, commit *git.CommitInfo, cfg *config.Config) error {
+	f, err := os.Create(path)
+	if err != nil {
+		return fmt.Errorf("cannot create root slice file: %w", err)
+	}
+	defer f.Close()
+
+	var sb strings.Builder
+	fmt.Fprintf(&sb, "# %s [ROOT]\n", absRoot)
+	fmt.Fprintf(&sb, "> Generated: %s\n", time.Now().Format(time.RFC3339))
+	sb.WriteString(git.FormatCommitLine(commit))
+	sb.WriteString(FormatFlags(cfg))
+
+	sb.WriteString("Root contents: all files at the repository root level.\n\n")
+
+	if len(rootFiles) == 0 {
+		sb.WriteString("(none)\n")
+		_, err = f.WriteString(sb.String())
+		return err
+	}
+
 	sort.Slice(rootFiles, func(i, j int) bool { return rootFiles[i].RelPath < rootFiles[j].RelPath })
 	for _, entry := range rootFiles {
 		fullPath := filepath.Join(absRoot, entry.RelPath)
@@ -234,7 +272,6 @@ func writeRootSlice(path, absRoot, rootName, repoName string, rootFiles []walker
 		}
 		fmt.Fprintf(&sb, "%s\n--- END FILE ---\n\n", fenceChars)
 	}
-	}
 
 	_, err = f.WriteString(sb.String())
 	return err
@@ -256,7 +293,7 @@ func writeDirSlice(path, absDir, absRoot, dirName string, fileEntries []walker.E
 
 	sb.WriteString("## Directory Tree\n\n")
 	sb.WriteString(fenceChars + "\n")
-	sb.WriteString(renderTreeWithLegend(treeRoot, filepath.Base(absRoot)))
+	sb.WriteString(renderTreeWithLegend(treeRoot, filepath.Base(absDir)))
 	sb.WriteString(fenceChars + "\n\n")
 
 	if len(fileEntries) > 0 {