Custom Visual Studio Code Extension Development

I'm seeking an experienced developer to create a custom Visual Studio Code extension tailored to my specific requirements.

Key Features:
- The extension should allow me to define my own set of rules
- Specifically, I require the ability to create code formatting rules and code highlighting rules

Rule Application:
- The code formatting rules must be applicable both automatically upon file save and manually upon command execution.

Ideal Skills:
- Expertise in creating Visual Studio Code extensions
- Proficiency in JavaScript and TypeScript
- Prior experience with code formatting and syntax highlighting
- Understanding of code linting and analysis
- Strong communication skills to understand and implement my unique set of rules.

Please provide examples of your previous work in this domain, as well as any relevant experience.