Set up development environment + document Cursor Cloud setup

[nanehambardzumyan]

Summary

Sets up and verifies the development environment for the API Client Simulator (CodeSignal Bespoke template). Adds durable, non-obvious setup/run guidance to AGENTS.md under ## Cursor Cloud specific instructions.

The update script (run automatically on VM startup) installs deps and initializes the design-system submodule:

npm install
git submodule update --init --recursive

What was verified

• npm install — 376 packages installed.
• git submodule update --init --recursive — initializes client/design-system (required for styled UI).
• npm run build — Vite build succeeds (benign font-resolution warnings only).
• npm run start:dev — Vite on :3000 + API on :3001, both healthy.
• node scripts/smoke-test.mjs — demo CRUD endpoints pass (200/201/200/200/200).
• Hello-world E2E in the UI: sent GET /demo-api/health (200) and POST /demo-api/users {"name":"Alice"} (201).

Walkthrough

api_simulator_hello_world.mp4

API Client Simulator loads styled and returns a live 200 for the health check.

GET 200 response
POST 201 response creating user Alice

Notes

• No lint/test npm script and no ESLint config exist in the repo (documented in AGENTS.md so future agents don't search for one).

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