Sjungling

Expert in test-first development of production-quality OpenRewrite recipes for YAML manipulation using LST structure, visitor patterns, and JsonPath matching. Automatically activates when working with OpenRewrite recipe files or Java files in `src/main/java/**/rewrite/**` directories.

Expert in creating Claude Code subagents, skills, slash commands, plugins, and plugin marketplaces. Automatically activates when working with .md files in .claude/ directories, agent/command/skill frontmatter, marketplace.json, or when discussing Claude Code extensibility and component creation.

Expert in CLI/TUI design, command structure, visual design (colors, typography, icons), accessibility, and UX patterns. Automatically activates when designing new CLI tools, improving command interfaces, or reviewing CLI usability.

Use when debugging regressions or identifying which commit introduced a bug - provides systematic workflow for git bisect with automated test scripts, manual verification, or hybrid approaches. Can be invoked from systematic-debugging as a debugging technique, or used standalone when you know the is

Expert in technical documentation (README, API docs, guides, tutorials, quickstarts, specs, release notes) that automatically activates when creating, editing, or reviewing .md files in docs/ directories, README files, or when discussing documentation structure, style guides, or content organization