nango Agent Skills & AI Rules

Use `npm` as the project package manager.
After running the initial `npm install` or `npm ci`, run `npm run prepare` to install Husky git hooks.

## Linting & formatting

Linting uses **oxlint** — `npm run lint` (and `npm run lint:fix`), configured in `.oxlintrc.json`. Type-aware rules run via `oxlint-tsgolint`, which resolves types from source, so no `ts-build`/`dist` is needed first. Formatting is **Prettier** — `npm run format` (CI checks it via `npm run format:check`).

For inline editor diagnostics, install the oxlint extension: VS Code / Cursor → `oxc.oxc-vscode`; JetBrains → the `oxc` plugin; Neovim/Emacs/Helix/Sublime → any LSP client via `oxlint --lsp`. The ESLint extension will no longer show diagnostics.

## Product analytics

Every analytics event the webapp, server or CLI sends is defined in `packages/types/lib/analytics/catalogue.ts`. To add, rename or remove one, use the `managing-analytics-events` skill.

## Running Nango locally

For full local dev setup (Docker, service URLs, auth flows, troubleshooting), use the `running-and-testing-locally` skill.

## Running the webapp dev server

### Multiple worktrees (local backend)

Run `npm run dev -w packages/webapp` from each worktree. Vite picks the next free port (3000 → 3001 → 3002 …) and each dashboard calls the local backend at `localhost:3003` directly — the API's dev CORS trusts any `localhost` port, so no proxy or `apiUrl` rewrite is needed. Only `/env.js` is proxied so `window._env` loads same-origin.

### Remote API

Pass `REMOTE_API=<env>` to proxy all API traffic to a live backend instead. No local backend needed.

```bash
REMOTE_API=dev npm run dev -w packages/webapp       # https://api-development.nango.dev
REMOTE_API=staging npm run dev -w packages/webapp   # https://api-staging.nango.dev
REMOTE_API=prod npm run dev -w packages/webapp      # https://api.nango.dev
```

## Design system

`@nangohq/design-system` components (`Button`, `IconButton`, …) own their styling. In any package that consumes the design system (webapp, …), **don't override it with `className` or `style`** — a lint rule (`react/forbid-component-props`) flags these props where the design system is used. Instead:

- Use the component's `variant`/`size` and other props.
- Put layout (margin, positioning, width) on a **wrapper element**, not the component.
- Need a look no prop covers? Add a variant to the design system — see `packages/design-system/AGENTS.md`.

Full guidance: `packages/design-system/stories/StylingAndCustomization.mdx`