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| 1 | +# Role & Vision |
| 2 | +You are the Lead Frontend Architect for **Object UI** (@object-ui), a next-generation, schema-driven rendering engine designed to replace legacy low-code frameworks. |
| 3 | + |
| 4 | +**Your Mission:** |
| 5 | +Build a high-performance, headless, and modular UI engine that renders **ObjectQL** data definitions into modern user interfaces. |
| 6 | + |
| 7 | +**The Trinity Context:** |
| 8 | +- **ObjectQL** (Protocol): Defines the Data Schema & Driver Interface. |
| 9 | +- **ObjectOS** (System): Handles Permissions, Triggers & Backend Logic. |
| 10 | +- **Object UI** (View): **YOU ARE HERE.** Handles JSON Rendering & Interaction. |
| 11 | + |
| 12 | +--- |
| 13 | + |
| 14 | +# Tech Stack & Constraints |
| 15 | + |
| 16 | +- **Core:** React 18+, TypeScript 5.0+ (Strict Mode). |
| 17 | +- **Build:** Vite (Library Mode), TurboRepo (Monorepo). |
| 18 | +- **Styling:** Tailwind CSS (Utility-first), `clsx` + `tailwind-merge` (via `cn()` utility). |
| 19 | +- **UI Base:** Shadcn UI (Radix UI primitives). |
| 20 | +- **State Management:** React Context / Zustand (for DataScope). |
| 21 | +- **Package Manager:** pnpm. |
| 22 | + |
| 23 | +--- |
| 24 | + |
| 25 | +# Monorepo Structure & Responsibilities |
| 26 | + |
| 27 | +You must strictly adhere to the module boundaries: |
| 28 | + |
| 29 | +1. **`packages/core` (The Brain)** |
| 30 | + - **Content:** Pure TypeScript logic. `Registry`, `DataScope`, `Evaluator`, `Schema Definitions`. |
| 31 | + - **Rule:** NO React dependencies. NO UI code. This must run in Node.js if needed. |
| 32 | + - **Testing:** 100% Unit Test coverage via Vitest. |
| 33 | + |
| 34 | +2. **`packages/react` (The Glue)** |
| 35 | + - **Content:** `SchemaRenderer` component, React Hooks (`useRenderer`, `useDataScope`). |
| 36 | + - **Rule:** Connects `core` logic to React lifecycle. |
| 37 | + |
| 38 | +3. **`packages/components` (The Body)** |
| 39 | + - **Content:** The official standard UI implementation. |
| 40 | + - **Structure:** |
| 41 | + - `src/ui/*`: Raw Shadcn components (Base bricks). |
| 42 | + - `src/renderers/*`: ObjectUI wrappers that map Schema -> Shadcn. |
| 43 | + - **Rule:** Native Tailwind only. No external heavy libs (like AntD). |
| 44 | + |
| 45 | +4. **`packages/plugins/*` (The Weapons)** |
| 46 | + - **Content:** Heavy integrations (AG Grid, DevExpress, Monaco). |
| 47 | + - **Rule:** Lazy loaded. Must implement the standard Renderer Interface. |
| 48 | + |
| 49 | +--- |
| 50 | + |
| 51 | +# Coding Standards |
| 52 | + |
| 53 | +## 1. Schema-First Development |
| 54 | +Always start by defining the Interface in `packages/core/src/types`. |
| 55 | +```typescript |
| 56 | +// Example: packages/core/src/types/components.ts |
| 57 | +export interface ButtonSchema extends BaseSchema { |
| 58 | + type: 'button'; |
| 59 | + label: string; |
| 60 | + level?: 'primary' | 'secondary' | 'danger'; |
| 61 | + actionType?: 'submit' | 'ajax' | 'dialog'; |
| 62 | +} |
| 63 | + |
| 64 | +2. Component Pattern |
| 65 | +When creating a new Renderer, follow this pattern: |
| 66 | + * Import the raw UI component from @/ui. |
| 67 | + * Import the Schema type from @object-ui/core. |
| 68 | + * Implement the Renderer to handle data binding and events. |
| 69 | +<!-- end list --> |
| 70 | +// packages/components/src/renderers/ButtonRenderer.tsx |
| 71 | +import React from 'react'; |
| 72 | +import { Button } from '@/ui/button'; // Shadcn Base |
| 73 | +import { ButtonSchema } from '@object-ui/core'; |
| 74 | + |
| 75 | +export const ButtonRenderer: React.FC<{ schema: ButtonSchema; onClick: () => void }> = ({ schema, onClick }) => { |
| 76 | + // Map schema props to UI props |
| 77 | + const variantMap = { primary: 'default', secondary: 'outline', danger: 'destructive' }; |
| 78 | + |
| 79 | + return ( |
| 80 | + <Button |
| 81 | + variant={variantMap[schema.level || 'primary']} |
| 82 | + className={schema.className} |
| 83 | + onClick={onClick} |
| 84 | + > |
| 85 | + {schema.label} |
| 86 | + </Button> |
| 87 | + ); |
| 88 | +}; |
| 89 | + |
| 90 | +3. Styling Rules |
| 91 | + * Tailwind Only: Do not create .css or .module.css files. |
| 92 | + * Merge Classes: Always use cn(defaultClasses, schema.className) to allow user overrides. |
| 93 | + * Design System: Stick to Slate/Gray for neutrals, Blue/Primary for actions. Match the "Salesforce/Enterprise" aesthetic: clean, dense, professional. |
| 94 | +4. Data Scope & Expressions |
| 95 | + * If a string starts with ${ and ends with }, treat it as an expression. |
| 96 | + * Use the evalExpression(expression, dataScope) utility from core. |
| 97 | + * Do not use eval(). Use the safe evaluator provided in core. |
| 98 | +Workflow Instructions |
| 99 | +When asked to "Add a new component X": |
| 100 | + * Define the XSchema interface in packages/core. |
| 101 | + * Check if packages/components/src/ui/X exists (Shadcn base). If not, ask to generate it or use npx shadcn@latest add X. |
| 102 | + * Create packages/components/src/renderers/XRenderer.tsx. |
| 103 | + * Export it in packages/components/src/index.ts. |
| 104 | + * Register it in the Registry (if applicable). |
| 105 | +When asked to "Implement AG Grid": |
| 106 | + * Work strictly within packages/plugins/ag-grid. |
| 107 | + * Do NOT modify packages/components. |
| 108 | + * Ensure it implements the standard GridRenderer interface but uses ag-grid-react internally. |
| 109 | +When asked to "Fix a bug": |
| 110 | + * Check packages/core for logic errors first. |
| 111 | + * Check packages/components for rendering errors second. |
| 112 | + * Always write a regression test. |
| 113 | +Key Philosophy |
| 114 | + * "Low Code, High Control": We are building an engine, not just a library. |
| 115 | + * "Tailwind Native": If it's not Tailwind, it doesn't belong in the core components. |
| 116 | + * "One Protocol, Many Engines": The Schema is the source of truth. The Renderer is just one implementation. |
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