fix(mod_format): move smartconfig file renaming into the formatter orchestrator

ts/mod_format/index.ts

@@ -16,6 +16,27 @@ import { PrettierFormatter } from './formatters/prettier.formatter.js';
 import { ReadmeFormatter } from './formatters/readme.formatter.js';
 import { CopyFormatter } from './formatters/copy.formatter.js';
 
+/**
+ * Rename npmextra.json or smartconfig.json to .smartconfig.json
+ * before any formatter tries to read config.
+ */
+async function migrateConfigFile(): Promise<void> {
+  const target = '.smartconfig.json';
+  const targetExists = await plugins.smartfs.file(target).exists();
+  if (targetExists) return;
+
+  for (const oldName of ['smartconfig.json', 'npmextra.json']) {
+    const exists = await plugins.smartfs.file(oldName).exists();
+    if (exists) {
+      const content = await plugins.smartfs.file(oldName).encoding('utf8').read() as string;
+      await plugins.smartfs.file(`./${target}`).encoding('utf8').write(content);
+      await plugins.smartfs.file(oldName).delete();
+      logger.log('info', `Migrated ${oldName} to ${target}`);
+      return;
+    }
+  }
+}
+
 // Shared formatter class map used by both run() and runFormatter()
 const formatterMap: Record<string, new (ctx: FormatContext, proj: Project) => BaseFormatter> = {
   cleanup: CleanupFormatter,
@@ -53,6 +74,9 @@ export let run = async (
 
   const shouldWrite = options.write ?? (options.dryRun === false);
 
+  // Migrate config file before anything reads it
+  await migrateConfigFile();
+
   const project = await Project.fromCwd({ requireProjectType: false });
   const context = new FormatContext();
   const planner = new FormatPlanner();