Project Validator

Validates apps-in-toss project configuration, structure, and policies for both web and React Native projects.

Supported Project Types:

• Web projects using @apps-in-toss/web-framework
• React Native projects using @apps-in-toss/granite with Metro bundler
• Unity game projects (WebGL builds using @apps-in-toss/web-framework)

How to Use This Skill

When validating an apps-in-toss project, follow these steps:

1. Identify the project type (Web or React Native)
2. Read and check the relevant files using the Read tool
3. Compare against the schema in the reference documentation
4. Report findings to the user with specific issues and solutions

Validation Checklist

Project Structure

Check that the project has:

• ✅ package.json exists
• ✅ granite.config.ts exists
• ⚠️ src/ directory exists (recommended)
• ⚠️ tsconfig.json exists (recommended for TypeScript projects)

package.json Validation

Check:

• ✅ File is valid JSON
• ✅ Has @apps-in-toss/framework, @apps-in-toss/web-framework, or @granite-js/react-native in dependencies or devDependencies
• ⚠️ Has TDS (Toss Design System) package (strongly recommended for consistent Toss UX):
  • For React Native with @apps-in-toss/framework < 1.0.0: @toss-design-system/react-native
  • For React Native with @apps-in-toss/framework >= 1.0.0: @toss/tds-react-native
  • For Web with @apps-in-toss/web-framework < 1.0.0: @toss-design-system/mobile
  • For Web with @apps-in-toss/web-framework >= 1.0.0: @toss/tds-mobile
• ⚠️ Has name field
• ⚠️ Has version field
• ⚠️ Has scripts field with common scripts (dev, build, etc.)

granite.config.ts Validation

For Web Projects

Check against web-granite-config-schema.md:

Required checks:

• ✅ File exists and is readable
• ✅ Imports defineConfig from @apps-in-toss/web-framework/config
• ✅ Has export default defineConfig statement
• ✅ Contains required fields:
  • appName (string)
  • brand (object with displayName, primaryColor, icon)
  • permissions (array)
  • web.port (number)
  • web.commands.dev (string)
  • web.commands.build (string)

Optional recommended fields:

• ⚠️ navigationBar (object)
• ⚠️ webViewProps (object)
• ⚠️ outdir (string)

For React Native Projects

Check against react-native-granite-config-schema.md:

Required checks:

• ✅ File exists and is readable
• ✅ Imports defineConfig from @granite-js/react-native/config
• ✅ Imports appsInToss from @apps-in-toss/framework/plugins
• ✅ Has export default defineConfig statement
• ✅ Contains required fields:
  • scheme (string)
  • appName (string)
• ✅ Contains appsInToss plugin in plugins array with:
  • brand (object with displayName, primaryColor, icon)
  • permissions (array)

Optional recommended fields:

• ⚠️ navigationBar (object)
• ⚠️ entryFile (string)
• ⚠️ outdir (string)

Validation Workflow

When Starting a New Project

1. Read package.json to identify project type and framework version
2. Read granite.config.ts to determine app type (game vs non-game)
3. Identify configuration schema to use:
   • Web apps (including Unity games): web-granite-config-schema.md
   • React Native apps: react-native-granite-config-schema.md
4. For non-game apps: Check if TDS package is installed (recommended for better UX)
5. For Unity game apps: Check for Unity SDK installation or WebGL build artifacts (see unity-game-validation.md)
6. Check all required fields against the appropriate schema
7. Report any missing or incorrect configuration
8. Provide specific solutions from the schema documentation

When Debugging Configuration Issues

1. Ask the user what issues they're experiencing
2. Read the relevant configuration files
3. Compare against schema requirements
4. Identify the root cause
5. Provide the solution from Common Issues and Solutions

When Reviewing Project Setup

1. Systematically check all validation points
2. Report critical errors (❌) first
3. Then report warnings (⚠️)
4. Suggest improvements based on best practices

Reporting Validation Results

When reporting validation results to the user:

✅ Success

All required checks passed. The project configuration is valid.

❌ Critical Error

Required configuration is missing or invalid. The project may not work correctly.

• Report these with high priority
• Provide specific file location (e.g., granite.config.ts:15)
• Include the exact fix from the schema documentation

⚠️ Warning

Non-critical issue detected. The project may work, but best practices recommend addressing these.

• Report these after critical errors
• Explain why the recommendation matters
• Provide optional improvement suggestions

Common Issues and Solutions

Missing Framework Dependencies

Issue: package.json doesn't have required framework packages

Solution for Web:

npm install @apps-in-toss/web-framework

Solution for React Native:

npm install @granite-js/react-native @apps-in-toss/framework

Missing Required Field: appName

Issue: granite.config.ts is missing the appName field

Solution: Add appName to granite.config.ts:

export default defineConfig({
  appName: 'my-app',
  // ...
});

Missing Required Field: brand

Issue: granite.config.ts is missing the brand configuration

Solution: Add complete brand object:

export default defineConfig({
  brand: {
    displayName: 'My App',
    primaryColor: '#3182F6',
    icon: 'https://static.toss.im/icons/app-icon.png',
  },
  // ...
});

Missing Required Field: permissions

Issue: granite.config.ts is missing the permissions array

Solution: Add permissions array (can be empty):

export default defineConfig({
  permissions: [],
  // or with specific permissions:
  permissions: [
    { name: 'clipboard', access: 'read' },
    { name: 'camera', access: 'access' },
  ],
  // ...
});

Missing appsInToss Plugin (React Native)

Issue: React Native project doesn't have appsInToss plugin

Solution: Add the plugin to the plugins array:

import { appsInToss } from '@apps-in-toss/framework/plugins';

export default defineConfig({
  plugins: [
    appsInToss({
      brand: {
        displayName: 'My App',
        primaryColor: '#3182F6',
        icon: 'https://static.toss.im/icons/app-icon.png',
      },
      permissions: [],
    }),
  ],
});

Incorrect Import Path

Issue: Using wrong import path for defineConfig

Solution for Web:

import { defineConfig } from '@apps-in-toss/web-framework/config';

Solution for React Native:

import { defineConfig } from '@granite-js/react-native/config';

Required File Missing: granite.config.ts

Issue: Project doesn't have a granite.config.ts file

Solution: Create the file using the appropriate template:

• Web projects: See web-granite-config-schema.md
• React Native projects: See react-native-granite-config-schema.md

Missing Export Statement

Issue: granite.config.ts doesn't export the configuration

Solution: Add export statement:

export default defineConfig({ /* config */ });

Missing TDS (Toss Design System) Package

Issue: Mini-app doesn't have TDS package in package.json

Important: TDS is strongly recommended for consistent Toss UX and better review approval chances.

Solution for React Native:

Check framework version in package.json:

If @apps-in-toss/framework < 1.0.0:

npm install @toss-design-system/react-native

If @apps-in-toss/framework >= 1.0.0:

npm install @toss/tds-react-native

Solution for Web:

Check framework version in package.json:

If @apps-in-toss/web-framework < 1.0.0:

npm install @toss-design-system/mobile

If @apps-in-toss/web-framework >= 1.0.0:

npm install @toss/tds-mobile

TDS Documentation:

• React Native: https://tossmini-docs.toss.im/tds-react-native
• Web: https://tossmini-docs.toss.im/tds-mobile

Note: Game apps (appType: 'game') may be exempt from TDS requirement

Reference Documentation

Always consult these references when validating:

• web-granite-config-schema.md — Full schema and examples for web granite.config.ts
• react-native-granite-config-schema.md — Full schema and examples for React Native granite.config.ts
• unity-game-validation.md — Validation guide for Unity WebGL game projects
• Apps-in-Toss Unity official docs (key takeaways for validation):
  • Platform model & precheck (overview, runtime-structure, precheck): WebGL/WASM + JS bridge; no native plugins; mobile/touch targets; file I/O and sockets limited; AR/XR/Compute constrained.
  • Engine versions (recommend-engine): Prefer Unity 2023.3 LTS; 2022.3 stable; 2021.3 legacy; avoid 2024.2 beta for production.
  • Migration flow (migration-guide): Precheck → WebGL conversion → Apps-in-Toss SDK integration → UX/perf optimization → .ait packaging/monitoring.
  • Performance goals (perf-optimization, perf-measure): Startup <3s target (<5s max), avg FPS ≥30 on mobile, memory <200MB (critical >300MB), first frame <5s, battery ~90–110% of native.
  • Runtime/startup/loading (runtime/performance, startup-speed, loading): Adaptive frame/quality, batching/instancing/LOD/culling, pooled updates; avoid heavy first-frame work; progressive/prioritized loading with unload paths and cache limits; scene transitions near 2s when possible.
  • Debugging (debug-exception): Centralized logging to web/Apps-in-Toss, global exception handler with recovery, in-app profiler/console hooks for WebGL.

Best Practices for Validation

1. Be Specific: When reporting issues, include exact file paths and line numbers if possible
2. Provide Context: Explain why a field is required or recommended
3. Offer Solutions: Always provide the exact code fix from the schema documentation
4. Prioritize: Report critical errors before warnings
5. Be Thorough: Check all required fields, not just the obvious ones
6. Check TDS Usage: Verify if TDS package is installed and recommend it for consistent Toss UX
7. Provide Documentation Links: Include relevant TDS documentation links when suggesting TDS

Example Validation Report

Validating apps-in-toss project...

✅ package.json found and valid
✅ granite.config.ts found

Project Type: Web (detected @apps-in-toss/web-framework v1.2.0)
App Type: general (non-game)

❌ Critical Errors:
1. Missing required field: brand
   Location: granite.config.ts
   Fix: Add brand configuration with displayName, primaryColor, and icon

2. Missing required field: permissions
   Location: granite.config.ts
   Fix: Add permissions array (can be empty: permissions: [])

⚠️ Warnings:
1. Missing recommended field: navigationBar
   Suggestion: Add navigationBar for better UX

2. TDS package not found
   Recommendation: Install @toss/tds-mobile (for @apps-in-toss/web-framework >= 1.0.0)
   Command: npm install @toss/tds-mobile
   Benefit: Provides consistent Toss UX and improves review approval chances
   Documentation: https://tossmini-docs.toss.im/tds-mobile

Consult: references/web-granite-config-schema.md for complete examples