# Description

This PR migrates our CI/CD pipelines from AWS CodeBuild to GitHub
Actions, providing better integration, improved visibility, and enhanced
developer experience.

# What's New

1. Pre-Merge CI Pipeline (build.yml)

- Parallel Test Execution: IsaacLab Tasks and General Tests run in
parallel
- Test Result Reporting: Integrated dorny/test-reporter for PR-level
test summaries
- Artifact Management: Automatic test result collection and combination
- PR Comments: Detailed test results posted directly to PRs

2. Post-Merge CI Pipeline (postmerge-ci.yml)

- Multi-Version Docker Builds: Builds images for multiple IsaacSim
versions
- Efficient Tagging: Single build with multiple tags (combined +
build-numbered)
- Docker Hub Integration: Automatic push to Docker Hub with proper
authentication
- Cached Builds: GitHub Actions cache for faster subsequent builds

3. Daily Compatibility Tests (daily-compatibility.yml)

- Backwards Compatibility: Tests against different IsaacSim versions
- Scheduled Execution: Daily runs at 2 AM UTC (6 PM PST)
- Manual Trigger: Support for manual testing with custom IsaacSim
versions
- Comprehensive Reporting: Detailed compatibility reports and artifacts

4. Repository Mirroring (mirror-repository.yml)

- Post-Merge Mirroring: Automatically mirrors main branch to target
repository
- Admin-Only Access: Environment protection for secure mirroring
- Conditional Execution: Only runs on specific repository

# Technical Improvements
**Docker Build Optimization**

- Single Build, Multiple Tags: Eliminated duplicate builds for
efficiency
- Buildx Integration: Modern Docker buildx for better caching and
multi-platform support
- GitHub Actions Cache: Faster builds with intelligent layer caching

**Test Infrastructure**

- Modular Actions: Reusable composite actions for Docker build, test
execution, and result processing
- Robust Error Handling: Graceful handling of missing artifacts and test
failures
- XML Report Combination: Merges multiple test suites into unified
reports

**Security & Permissions**

- Environment Protection: Admin-only access for sensitive operations
- Granular Permissions: Proper token and permission management
- Secure Authentication: NGC and Docker Hub integration with secrets