**CLI Integration:**
- Added --engine parameter to md-render command
- Default engine selection: testdrive-jsui for edit/insert, standard for view
- Graceful fallback to standard rendering when plugin unavailable
- Engine validation and mode compatibility checking
**Plugin Discovery:**
- Enhanced RenderingEngineManager with builtin plugin registration
- Automatic discovery and registration of testdrive-jsui engine
- Support for both plugin system discovery and direct registration
**Configuration Management:**
- Production-ready RenderingConfig for CLI usage
- Asset deployment to _markitect/plugins/ structure
- Configurable asset base URLs and deployment strategies
**Testing Infrastructure:**
- Comprehensive test suite for plugin discovery
- CLI integration testing without Click framework dependencies
- Complete scenario testing (default, explicit, fallback, unknown engines)
- Integration verification scripts
**Documentation:**
- Complete PLUGIN_SYSTEM.md documentation
- Architecture overview and development workflows
- JavaScript-first development guide
- Asset management and deployment strategies
- CLI usage examples and troubleshooting guide
**Key Features:**
- `markitect md-render --edit` now uses testdrive-jsui by default
- `markitect md-render --engine testdrive-jsui --edit` for explicit selection
- `markitect md-render --engine standard --edit` for legacy behavior
- Automatic fallback with user-friendly error messages
This completes the plugin infrastructure implementation, enabling
independent JavaScript development with seamless CLI integration.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
tegwick
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