vega-multi-tv-migration

Vega Multi-Platform Migration

Overview

Migrate Vega OS (Fire TV) apps to multi-platform React Native monorepo with 70-85% code reuse across Android TV, Apple TV, and Vega OS.

When to Apply

Use this skill when user mentions:

• Migrating Vega/Fire TV app to other platforms
• Building multi-platform TV application
• Converting single-platform TV app to monorepo
• Adding Android TV or Apple TV support
• Sharing code between TV platforms
• Setting up Yarn workspaces for TV apps

Phase Priority Guide

Priority	Phase	Impact	When to Use
1	Analysis	CRITICAL	Starting migration, no existing analysis
2	Implementation	CRITICAL	Have analysis, need monorepo structure
3	Platform Support	HIGH	Have working Vega monorepo, adding platforms
4	Configuration	MEDIUM	Troubleshooting build/resolution issues

Quick Decision Tree

User has existing Vega app?
├─ YES → Do they have migration analysis?
│  ├─ NO → Start Phase 1 (Analysis)
│  └─ YES → Is monorepo set up?
│     ├─ NO → Start Phase 2 (Implementation)
│     └─ YES → Start Phase 3 (Platform Support)
└─ NO → Starting from scratch?
   └─ YES → Skip Phase 1, start Phase 2 with new project

Quick Reference

Critical: Project Structure

# Verify monorepo structure exists
ls -la packages/shared packages/vega packages/expotv

# Check Yarn workspaces configured
grep -A5 "workspaces:" package.json

Critical: Dependency Classification

Common patterns for analysis:

• Shared: Business logic, UI components, utilities, state management
• Platform-specific: Navigation, video players, DRM, native modules
• VMRP-compatible: Standard RN libraries that map to Vega equivalents

High: VMRP Configuration

Quick check if VMRP is working:

# Should see @vega-tv/react-native-module-resolver-preset
grep "vmrp" packages/vega/babel.config.js

References

Phase 1: Analysis (analysis-*)

File	Impact	Description
PHASE1_ANALYSIS.md	CRITICAL	Codebase analysis, dependency classification, migration planning

Use when: Starting migration, no existing analysis document

Phase 2: Implementation (impl-*)

File	Impact	Description
PHASE2_IMPLEMENTATION.md	CRITICAL	Monorepo scaffolding, code migration, VMRP setup with template references

Use when: Have analysis, ready to build monorepo structure

Phase 3: Platform Support (platform-*)

File	Impact	Description
PHASE3_PLATFORM_SUPPORT.md	HIGH	Android TV and Apple TV implementation

Use when: Have working Vega monorepo, adding new platforms

Templates

All configuration templates in assets/templates/ with companion .md docs:

• root-package.json - Yarn workspaces setup
• root-tsconfig.json - TypeScript project references
• yarnrc.yml - Dependency deduplication (CRITICAL)
• shared-package.json + .md - Shared package config with rules
• vega-metro.config.js - Vega Metro with monorepo resolution
• expotv-package.json + .md - Expo TV package config
• expotv-app.json + .md - Expo TV configuration with plugins
• expotv-metro.config.js - Expo Metro with TV extensions

Problem → Skill Mapping

Problem	Start With
Need to analyze existing Vega app	PHASE1_ANALYSIS.md
Have analysis, need monorepo setup	PHASE2_IMPLEMENTATION.md → templates
Monorepo exists, adding Android TV	PHASE3_PLATFORM_SUPPORT.md
Metro resolution errors	PHASE2_IMPLEMENTATION.md → Metro config
Duplicate React versions	PHASE2_IMPLEMENTATION.md → .yarnrc.yml
VMRP not mapping imports	PHASE2_IMPLEMENTATION.md → VMRP section
TypeScript path errors	PHASE2_IMPLEMENTATION.md → TypeScript config
Native module integration	PHASE3_PLATFORM_SUPPORT.md → Native Modules
Build configuration issues	PHASE2_IMPLEMENTATION.md → Configuration Files
Starting from scratch	PHASE2_IMPLEMENTATION.md (skip Phase 1)

Workflow

1. Use the decision tree above to determine the starting phase
2. Load the appropriate reference file for that phase
3. Follow Quick Start → Deep Dive pattern in each reference
4. Verify at each phase's checkpoint before moving to the next phase
5. Use VALIDATION_CHECKLIST.md for comprehensive verification

Attribution

Based on Vega OS multi-platform migration patterns and React Native monorepo best practices.