Experienced software engineer skilled in front-end and back-end technologies. Proficient in software design principles, design patterns, and clean architectures
Guides intentional Nothing-inspired UI and design-system work with typography, spacing, hierarchy, components, and platform-specific execution. Use when the user explicitly asks for Nothing style, Nothing design, or `/nothing-design`, not for generic UI or design tasks.
Manage pinned tags and commit SHAs for GitHub Actions security, resolving mutable tags to immutable commit references. Use when the task involves `Unpinned tag for a non-immutable Action`, `pin GitHub Action to commit SHA`, `resolve git tag to SHA`, or `GitHub Actions security hardening`.
Comprehensive Playwright E2E testing skill combining planning, generation, and healing. Trigger: When writing, debugging, or planning E2E tests, working with *.spec.ts files, Playwright config, test fixtures, or when asked to create/fix/plan browser tests.