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+# CI/CD Quick Fix Guide
+
+This document provides quick solutions for common CI/CD issues in this project.
+
+## Quick Start - Running CI/CD Locally
+
+```bash
+# Install dependencies
+npm install
+
+# Run all CI checks
+npm run lint          # ESLint with auto-fix
+npx tsc --noEmit      # TypeScript type checking
+npm run build         # Build the application
+
+# Run E2E tests (requires dev server)
+npm run test:e2e
+
+# Build Docker image
+docker build -t codeforge:local .
+docker run -p 3000:80 codeforge:local
+```
+
+## Common Issues and Fixes
+
+### 1. "Cannot find module '@github/spark'"
+
+**Symptom**: Import errors for `@github/spark`
+
+**Solution**: The spark package is now implemented in `packages/spark/`. Run:
+```bash
+npm install
+```
+
+### 2. "ESLint couldn't find an eslint.config.js file"
+
+**Symptom**: ESLint fails with config not found
+
+**Solution**: The project now uses ESLint v9 flat config format. File is at `eslint.config.js`.
+
+### 3. "Property 'spark' does not exist on type 'Window'"
+
+**Symptom**: TypeScript errors about window.spark
+
+**Solution**: Type definitions are in `packages/spark/src/types.d.ts` and auto-imported. Run:
+```bash
+npx tsc --noEmit
+```
+
+Should show 0 errors.
+
+### 4. "Unknown file extension .ts for vite plugin"
+
+**Symptom**: Vite can't load TypeScript plugin files
+
+**Solution**: Plugins are now .mjs files:
+- `packages/spark/src/spark-vite-plugin.mjs`
+- `packages/spark/src/vitePhosphorIconProxyPlugin.mjs`
+
+### 5. Docker Build Fails at npm run build
+
+**Symptom**: "devDependencies not found" during Docker build
+
+**Solution**: Dockerfile now uses `npm ci` (not `npm ci --only=production`). Rebuild:
+```bash
+docker build -t codeforge:latest .
+```
+
+## Auto-Fix Lint Issues
+
+The lint command now includes auto-fix by default:
+
+```bash
+npm run lint        # Runs with --fix
+npm run lint:check  # Check only, no auto-fix (for CI)
+```
+
+## Package Structure
+
+```
+/
+├── packages/
+│   └── spark/              # @github/spark workspace package
+│       ├── src/
+│       │   ├── hooks/
+│       │   │   └── index.ts           # useKV hook
+│       │   ├── spark-runtime.ts        # Core runtime
+│       │   ├── spark.ts                # Initialization module
+│       │   ├── types.d.ts              # TypeScript definitions
+│       │   ├── spark-vite-plugin.mjs   # Vite plugin
+│       │   └── vitePhosphorIconProxyPlugin.mjs
+│       ├── package.json
+│       ├── tsconfig.json
+│       └── README.md
+├── src/                    # Application source
+├── e2e/                    # Playwright E2E tests
+├── eslint.config.js        # ESLint v9 flat config
+├── Dockerfile              # Multi-stage Docker build
+├── docker-compose.yml      # Docker Compose setup
+└── .github/workflows/      # GitHub Actions CI/CD
+
+```
+
+## CI/CD Workflow Commands
+
+### GitHub Actions
+```yaml
+- npm ci                    # Install dependencies
+- npm run lint              # Lint with auto-fix
+- npx tsc --noEmit          # Type check
+- npm run build             # Build application
+- npm run test:e2e          # E2E tests
+```
+
+### Local Development
+```bash
+npm run dev                 # Start dev server
+npm run preview             # Preview production build
+npm run lint                # Lint with auto-fix
+npm run build               # Production build
+```
+
+## Environment Variables
+
+No environment variables required for build. All configuration is in:
+- `vite.config.ts` - Build configuration
+- `tsconfig.json` - TypeScript configuration
+- `eslint.config.js` - Linting configuration
+- `playwright.config.ts` - E2E test configuration
+
+## Debugging Build Issues
+
+### Enable Verbose Logging
+```bash
+npm run build -- --debug
+```
+
+### Check TypeScript Compilation
+```bash
+npx tsc --noEmit --listFiles | grep error
+```
+
+### Check Bundle Size
+```bash
+npm run build
+ls -lh dist/assets/
+```
+
+### Test Production Build Locally
+```bash
+npm run build
+npm run preview
+# Visit http://localhost:4173
+```
+
+## Update Dependencies
+
+```bash
+# Check for outdated packages
+npm outdated
+
+# Update all to latest compatible versions
+npm update
+
+# Update package-lock.json
+npm install
+```
+
+## Troubleshooting Workspace
+
+If workspace dependencies cause issues:
+
+```bash
+# Clean install
+rm -rf node_modules package-lock.json
+rm -rf packages/*/node_modules
+npm install
+
+# Verify workspace is linked
+ls -la node_modules/@github/
+# Should show: spark -> ../../packages/spark
+```
+
+## CI/CD Platform-Specific Notes
+
+### GitHub Actions
+- Uses Node.js 20.x
+- Caches node_modules automatically
+- Runs on ubuntu-latest
+- Docker builds push to GHCR
+
+### GitLab CI
+- Uses node:20-alpine image
+- Manual cache configuration required
+- Supports parallel stages
+- Docker builds push to GitLab Registry
+
+### Jenkins
+- Requires Node.js 20 installation configured
+- Uses NodeJS plugin
+- Needs Docker plugin for builds
+- Manual workspace cleanup
+
+### CircleCI
+- Uses cimg/node:20.11 executor
+- Docker layer caching available (paid)
+- Requires environment variables for secrets
+- Workflow dependencies via `requires`
+
+## Performance Tips
+
+1. **Faster npm install**: Use `npm ci` instead of `npm install` in CI
+2. **Cache dependencies**: All CI configs include caching
+3. **Parallel jobs**: Use where available (lint + test)
+4. **Skip optional deps**: Not needed for this project
+5. **Docker layer caching**: Enable in CI for faster builds
+
+## Getting Help
+
+1. Check `CI_CD_SIMULATION_RESULTS.md` for detailed test results
+2. Check `CI_CD_GUIDE.md` for platform-specific setup
+3. Review workflow files in `.github/workflows/`, `.gitlab-ci.yml`, `Jenkinsfile`, `.circleci/config.yml`
+4. Check build logs for specific error messages
+
+## Verification Checklist
+
+Before pushing to CI, verify locally:
+
+- [ ] `npm install` - Completes without errors
+- [ ] `npm run lint` - No errors (warnings OK)
+- [ ] `npx tsc --noEmit` - 0 errors
+- [ ] `npm run build` - Generates dist/ folder
+- [ ] `npm run preview` - App loads at http://localhost:4173
+- [ ] Git status clean (no uncommitted changes)
+
+## Quick Reference
+
+| Command | Purpose | Duration |
+|---------|---------|----------|
+| `npm install` | Install all dependencies | ~15s |
+| `npm run lint` | ESLint with auto-fix | ~3s |
+| `npx tsc --noEmit` | Type checking | ~5s |
+| `npm run build` | Production build | ~8s |
+| `npm run test:e2e` | E2E tests | ~30s |
+| `docker build` | Docker image | ~2min |
+
+---
+
+**Last Updated**: 2026-01-17  
+**Project**: CodeForge Low-Code React App Builder  
+**CI/CD Status**: ✅ READY