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Browse reusable Agent Skills, each with a clear purpose and practical guidance.

demo-page

Use when creating a demo or test page for manual testing of Handsontable. Trigger when the user asks to create a demo, test page, repro page, reproduction case, manual test, or wants to verify a bug fix or feature visually. Also trigger when the user mentions dev-generated.html, dev-pr.html, dev-latest.html, dev.html, or wants to compare behavior between a released version and a local build. Use this for any PR that needs a manual testing artifact.

21.97k repo starsObserved in 1 repos
Testing & Quality
GitHub

handsontable-celltype-dev

Use when creating or modifying a Handsontable cell type that composes an editor, renderer, and validator into a reusable configuration object registered by name

21.97k repo starsObserved in 1 repos
Development
GitHub

handsontable-code-review

Use when reviewing changed or staged code, a branch, or a PR in the Handsontable monorepo across architecture, code quality, performance, and accessibility. Covers SOLID / Law of Demeter / plugin decoupling / breaking-changes policy, custom ESLint rules / JSDoc / naming / cognitive complexity, large-array and render-batching performance, and WCAG 2.1 AA + keyboard navigation. Trigger when asked to review changes, check a diff against Handsontable conventions, assess architectural correctness, spot performance regressions, or verify accessibility — and as the design lens before or while implementing any core change.

21.97k repo starsObserved in 1 repos
Testing & Quality
GitHub

handsontable-css-dev

Use when working with Handsontable themes, CSS custom properties, SCSS files, theme tokens, or visual styling - covers theme architecture, CSS variable API, the strict CSS/JS separation rule, and the four-layer process for adding or renaming theme tokens

21.97k repo starsObserved in 1 repos
Development
GitHub

handsontable-dev

Use for ANY work touching the `handsontable/` core package: fixing bugs, adding features, modifying TypeScript types, removing as-casts, writing or debugging plugins, editors, renderers, validators, cell types, hooks, shortcuts, selection, helpers, index translations, or i18n. Also use for how-to questions about core internals (plugin lifecycle, coordinate systems, hook registration, TypeScript conventions). Triggers on file paths under `handsontable/src/` (excluding `3rdparty/walkontable/` which has its own skill), or when the user describes a symptom in the core grid without naming a file. This is the primary entry point for all core Handsontable development — when in doubt, load it.

21.97k repo starsObserved in 1 repos
Development
GitHub

handsontable-e2e-testing

Use when writing or modifying Jasmine/Puppeteer E2E tests (*.spec.js) for Handsontable, or when a bug fix or feature change needs E2E test coverage. Covers standard boilerplate, async/await rules, global helpers, event simulation, plugin lifecycle patterns, and writing theme-agnostic assertions that pass under all themes without branching on theme name.

21.97k repo starsObserved in 1 repos
Testing & Quality
GitHub

handsontable-renderer-dev

Use when creating or modifying a Handsontable cell renderer function that controls how cell content is displayed in the DOM - pure functions that take cell data and modify TD element

21.97k repo starsObserved in 1 repos
Development
GitHub

handsontable-unit-testing

Use when writing or modifying Jest unit tests (*.unit.js) or TypeScript type tests (*.types.ts) for Handsontable core, plugins, or utilities, or when a bug fix or internal refactor needs unit or type test coverage - covers Jest setup, test location conventions, mocking patterns, module aliases, type test patterns (no declare, real assignments, ESM + UMD patterns), and when to choose unit tests over E2E tests

21.97k repo starsObserved in 1 repos
Testing & Quality
GitHub

i18n-translations

Use when adding user-facing text to Handsontable, creating new language constants, updating translation files, or working with RTL layouts and internationalization

21.97k repo starsObserved in 1 repos
Development
GitHub

performance-testing

Use when adding, modifying, or debugging Handsontable performance test scenarios in performance-tests/ - covers the CDP trace-based measurement system, scenario structure (fixture + config + spec), trace-parser integration, hook timing for filtering/sorting, golden snapshot workflow on GitHub Pages, and the CI comparison pipeline. Trigger whenever work touches performance-tests/ files, when asked to benchmark a Handsontable feature, or when adding a new performance scenario.

21.97k repo starsObserved in 1 repos
Testing & Quality
GitHub