feat(cli): assert types for every api block with declared fields

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

packages/cli/test/apis-block-types.test.ts

@@ -0,0 +1,48 @@
+import { afterEach, expect, test } from "bun:test";
+import { mkdirSync, mkdtempSync, readFileSync, rmSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { generateApplicationTypes } from "../src/types.ts";
+
+const roots: string[] = [];
+afterEach(() => {
+  for (const root of roots.splice(0)) rmSync(root, { recursive: true, force: true });
+});
+
+function fixture(apisBlock: string): string {
+  const root = mkdtempSync(join(tmpdir(), "wrnexus-apis-types-"));
+  roots.push(root);
+  mkdirSync(join(root, "app/pages"), { recursive: true });
+  mkdirSync(join(root, "app/api"), { recursive: true });
+  writeFileSync(
+    join(root, "app/api/users.ts"),
+    `export const POST = async () => Response.json({ users: [] });\n`,
+  );
+  writeFileSync(
+    join(root, "app/pages/search.wrn"),
+    `page Search {\n  apis {\n${apisBlock}\n  }\n\n  view { <main>x</main> }\n}\n`,
+  );
+  return root;
+}
+
+test("a mode-less block with declared fields gets an assertion", () => {
+  const root = fixture(`    searchUsers POST /api/users {
+      request { body { name?: string } }
+      response { return data.users }
+    }`);
+  generateApplicationTypes(root);
+  const generated = readFileSync(join(root, "app/types/wrnexus.generated.api-checks.ts"), "utf8");
+
+  expect(generated).toContain("searchUsers");
+  expect(generated).toContain('ApiInput<"/api/users", "POST">');
+});
+
+test("a block with no declared fields gets no assertion", () => {
+  const root = fixture(`    listAll GET /api/users {
+      response { return data.users }
+    }`);
+  generateApplicationTypes(root);
+  const generated = readFileSync(join(root, "app/types/wrnexus.generated.api-checks.ts"), "utf8");
+
+  expect(generated).not.toContain("listAll");
+});