Create Spring Boot Kotlin Project is an agent skill from github/awesome-copilot, published by the product's own GitHub organization. Create Spring Boot Kotlin Project Skeleton
Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Backend & APIs, covering Backend development and Android development. It works with Spring Boot, Kotlin, Java and PostgreSQL. The repository describes itself as: Community-contributed instructions, agents, skills, and configurations to help you make the most of GitHub Copilot. The licence is MIT.