Add AGENTS.md with Cursor Cloud specific instructions

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

Author: cursoragent

AGENTS.md

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+# AGENTS.md
+
+## Cursor Cloud specific instructions
+
+This is a **Svelte 4 + Vite 5 + TypeScript** client-side SPA (no backend). All data is fetched at runtime from public GitHub APIs.
+
+### Running the dev server
+
+```bash
+npm run dev
+```
+
+The app runs on `http://localhost:5173` by default.
+
+### Available scripts (see `package.json`)
+
+| Command | Purpose |
+|---|---|
+| `npm run dev` | Start Vite dev server |
+| `npm run build` | Production build to `dist/` |
+| `npm run check` | Run `svelte-check` (TypeScript + Svelte diagnostics) |
+| `npm run format` | Run Prettier with `--write` |
+
+### Known issues
+
+- `npm run check` reports 9 pre-existing TypeScript errors (type-casting issues in `App.svelte`, `Providers.svelte`, `Main.svelte`). These do **not** block the build or dev server.
+- `npx prettier --check .` reports 10 files with formatting issues (pre-existing).
+
+### Environment variables (optional)
+
+- `VITE_MIXPANEL_TOKEN` — enables Mixpanel analytics. The app works fully without it.