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+/**
+ * `wrnexus generate <type> <name>` — scaffold a page, component, API route, or
+ * schema from a template. Keeps new files consistent and gets users moving fast.
+ *
+ *   wrnexus generate page about
+ *   wrnexus generate component user-card
+ *   wrnexus generate api users/list
+ *   wrnexus generate schema signup
+ */
+
+import { existsSync, mkdirSync, writeFileSync } from "node:fs";
+import { dirname, join, resolve } from "node:path";
+
+export type GenerateType = "page" | "component" | "api" | "schema";
+
+const ALIASES: Record<string, GenerateType> = {
+  page: "page",
+  p: "page",
+  component: "component",
+  c: "component",
+  api: "api",
+  a: "api",
+  schema: "schema",
+  s: "schema",
+};
+
+export interface GeneratedFile {
+  /** Path relative to the `app/` directory. */
+  path: string;
+  content: string;
+}
+
+function toPascalCase(name: string): string {
+  return name
+    .split(/[^A-Za-z0-9]+/)
+    .filter(Boolean)
+    .map((part) => part.charAt(0).toUpperCase() + part.slice(1))
+    .join("");
+}
+
+function baseName(name: string): string {
+  const parts = name.split("/");
+  return parts[parts.length - 1] ?? name;
+}
+
+/** Produce the file (relative path + content) for a generate request. */
+export function scaffold(type: GenerateType, name: string): GeneratedFile {
+  const clean = name.replace(/\.(wrn|ts)$/, "").replace(/^\/+|\/+$/g, "");
+  const pascal = toPascalCase(baseName(clean));
+
+  switch (type) {
+    case "page":
+      return {
+        path: `pages/${clean}.wrn`,
+        content: `page ${pascal} {
+  layout = "public"
+
+  seo {
+    title = "${pascal}"
+  }
+
+  view {
+    <h1>${pascal}</h1>
+    <p>Edit app/pages/${clean}.wrn to build this page.</p>
+  }
+}
+`,
+      };
+    case "component":
+      return {
+        path: `components/${clean}.wrn`,
+        content: `component ${pascal} {
+  props {
+    label = "${pascal}"
+  }
+
+  view {
+    <div class="wire-${baseName(clean)}">{label}</div>
+  }
+}
+`,
+      };
+    case "api":
+      return {
+        path: `api/${clean}.ts`,
+        content: `import type { Context } from "@wrnexus/core";
+
+export async function GET(ctx: Context): Promise<Response> {
+  return Response.json({ ok: true, route: ctx.url.pathname });
+}
+`,
+      };
+    case "schema":
+      return {
+        path: `schemas/${clean}.ts`,
+        content: `import { v } from "@wrnexus/validation";
+
+export default v.object({
+  name: v.string().min(1, "Required"),
+});
+`,
+      };
+  }
+}
+
+/** Write a scaffolded file under `<appRoot>/app`, refusing to overwrite. */
+export function runGenerate(
+  appRoot: string,
+  typeArg: string | undefined,
+  name: string | undefined,
+): void {
+  const type = typeArg ? ALIASES[typeArg] : undefined;
+  if (!type || !name) {
+    console.error("Usage: wrnexus generate <page|component|api|schema> <name>");
+    process.exit(1);
+  }
+
+  const file = scaffold(type, name);
+  const target = join(resolve(appRoot), "app", file.path);
+  if (existsSync(target)) {
+    console.error(`Refusing to overwrite existing file: app/${file.path}`);
+    process.exit(1);
+  }
+  mkdirSync(dirname(target), { recursive: true });
+  writeFileSync(target, file.content, "utf8");
+  console.log(`✓ Created app/${file.path}`);
+}