add:agents.md

AGENTS.md

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+# Agent Guidelines for Serengo
+
+## Commands
+
+- **Build**: `pnpm run build`
+- **Lint**: `pnpm run lint` (prettier + eslint)
+- **Format**: `pnpm run format` (prettier --write)
+- **Type check**: `pnpm run check` (svelte-check)
+- **Dev server**: `pnpm run dev`
+- **Database**: `pnpm run db:start` (docker-compose), `pnpm run db:push` (schema push)
+
+## Important Rules
+
+- **NEVER deploy or perform pnpm commands or run the server unless explicitly asked**
+
+## Code Style
+
+- **Formatting**: Tabs, single quotes, no trailing commas, 100 char width
+- **TypeScript**: Strict mode enabled, use explicit types
+- **Imports**: External libraries first, then internal ($lib/, $env/)
+- **Svelte 5**: Use `$props()`, `$derived()`, `$effect()` runes
+- **Error handling**: Throw descriptive errors for missing env vars
+- **Naming**: camelCase for variables/functions, PascalCase for components/types
+- **CSS**: Custom classes in separate .css files
+
+## Testing
+
+- **Stories**: Storybook for component testing
+- **No unit tests**: Focus on Storybook stories for component validation
+
+## Database
+
+- **ORM**: Drizzle ORM with PostgreSQL
+- **Migrations**: `pnpm run db:generate` then `pnpm run db:migrate`