ethereum

Use when building, refactoring, or styling any UI in the ethereum.org Next.js site (`src/components/`, `app/`, `src/styles/`, `public/content/`, or any `.tsx`/`.mdx`/`.css` change that affects the rendered UI). Provides canonical component choices, design tokens, RTL/i18n rules, server/client guidance, and the "use a variant, not a new component" pattern for the project's Tailwind v4 + Radix + shadcn-style design system.

Use when working on the translation pipeline (`src/scripts/intl-pipeline/`), the post-import sanitizer (`intl-sanitizer.ts`), the `intl/pending-*` branches, the `intl-pipeline.yml` GitHub Actions workflow, ETHGlossary integration, or any translation-related issue (broken translations, missing locales, manifest drift, sanitizer false positives, ETHGlossary term lookups, language-group transliteration questions). Provides the manifest-driven incremental pipeline mental model, the "don't hand-propagate" rule, recovery procedures, the ETHGlossary-as-canonical-source policy, and the `intl/pending-{base}` orchestration contract.

Use when reviewing translation imports/PRs (especially against `intl/pending-*` branches), evaluating translation quality across any of the 24 target languages, triaging issues in `.claude/translation-review/`, scoring a locale's translation, running the `/review-translations` slash command, debugging brand-name mistranslations or glossary deviations, or working with the per-language findings tracking files. Covers the scoring rubric, ETHGlossary-as-authority policy, language-group rules, agent-role split (structural / terminology / semantic), the concept-tag-vs-brand-tag distinction in frontmatter, and the critical-vs-warning severity policy.

Performance patterns and anti-patterns for ethereum.org covering TTFB, LCP, INP, CLS, bundle size, build memory, and RSC payload. Use when diagnosing a perf regression or reviewing proposed code changes for perf landmines.

Playwright + Chromatic full-page visual tests for ethereum.org. Trigger on "add a page to the visual suite", "the snapshot keeps changing", "chromatic pages", "chromatic playwright", or edits to `tests/visual/`, `playwright.visual.config.ts`, or `.github/workflows/chromatic-pages.yml`. Skip for Storybook Chromatic (`chromatic.yml`), e2e (`tests/e2e/`), unit (`tests/unit/`).

This skill provides patterns for working with the data-layer module. Use when creating/editing files in src/data-layer/, src/lib/data/, or adding new data sources.

Commit changes and open pull requests. Follow the project's conventions for scope, formatting, and writing style. Always load this skill before committing or opening a pull request.

Prepare for a new release. Perform checks to ensure that the release action can be started. Always load this skill before helping with a release.

Run tests and generate reference tests. All testing goes through `make test`, never `pytest` directly. Always load this skill before running tests.

Convert an EIP proposed for the current fork into forkcast JSON format. Use when adding a new EIP to the tracker.

Guides contributors through adding or updating a tool/resource in catalog/resources.json and choosing tags from catalog/taxonomy.json. Use when the user wants to add a new resource, suggest tags, or update an existing resource entry.