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Browse reusable Agent Skills, each with a clear purpose and practical guidance.
analyzing-coverage
Use when measuring or chasing Vitest/v8 code coverage in the Trilium monorepo — "what's below 100%?", "which files need tests?", "what lines of X are uncovered?", "take <area> to 100%", or feeding coverage gaps to test-writing agents. Provides one reusable analyzer (coverage.mjs) for lcov.info / coverage-summary.json / coverage-final.json, the correct commands to produce that data on Windows, and the known footguns. Pairs with writing-unit-tests.
ckeditor5-plugin-development
Write, extend, and review CKEditor 5 plugins in the Trilium (TriliumNext Notes) monorepo — the rich-text-note editor under packages/ckeditor5 and the @triliumnext/ckeditor5-<feature> plugin packages. Use when building or reviewing a Trilium CKEditor 5 feature/plugin, or when working with the editing engine (model, view, schema, conversion/upcast-downcast), commands, the UI library (buttons, dropdowns, dialogs, balloons, toolbars), widgets (block/inline, toWidget, nested editables), keystrokes, localization (t()/.po), registering a plugin into plugins.ts / the editor classes / toolbar.ts, or adding a plugin to the aggregator (or, for large features, a new @triliumnext/ckeditor5-* package). Covers the architecture, idiomatic patterns, Trilium packaging/registration, code-style conventions, and a review checklist.
ckeditor5-reviewing
Review or audit CKEditor 5 plugin code in the Trilium (TriliumNext Notes) monorepo, or a PR/diff touching packages/ckeditor5-* or the packages/ckeditor5 build. Use when checking a Trilium CKEditor 5 plugin for correctness and idiom: schema / conversion / command / UI / widget code, CKEditor-specific defects (asymmetric upcast/downcast, unconsumed upcast elements, missing inline-widget position mapping, command refresh/isEnabled bugs, memory leaks, t() gaps, editing/UI split violations), and Trilium integration defects (plugin not registered in plugins.ts, button missing from toolbar.ts, import/file-extension lint failures, wrong augmentation module, .po localization gaps, wrong test environment). Pairs with the ckeditor5-plugin-development and ckeditor5-testing skills and delegates their checklists.
ckeditor5-testing
Testing CKEditor 5 plugins in the Trilium monorepo. Use when adding or reviewing unit tests for a packages/ckeditor5-* package, debugging a failing test, or setting up a package's test runner. Covers the two Vitest environments Trilium uses (happy-dom and the WebdriverIO browser mode), the per-package vitest.config.ts, testing against a real ClassicEditor, the model/view helpers imported from 'ckeditor5' (_setModelData / _getModelData / _getViewData and their {}/[] selection syntax), vi spies/mocks, idiomatic patterns for schema/conversion/command/UI tests, the pnpm --filter runner, and Trilium-specific conventions and gotchas. Complements the ckeditor5-plugin-development and writing-unit-tests skills.
measure-startup-requests
Use when measuring what the Trilium client loads at startup — "what loads at boot?", "did this change reduce the startup bundle?", "is <dependency> lazy?", or any before/after comparison for lazy-loading / code-splitting work. Drives a headless browser through login against the running dev server, records every request, and analyzes captures (summary, heavy-dependency probe, before/after diff). Don't write a new throwaway Playwright script or inline node analyzers — both already live here.
translating-locales
Use when filling in or improving a lagging UI translation locale in Trilium (e.g. "Romanian is behind", "bring <locale> to 100% coverage", "translate the missing strings"). Covers measuring the gap vs English, drafting translations that preserve i18next placeholders, merging without diff churn, locale grammar rules (Romanian plurals/gender), the source-side pluralization workflow, how Weblate sync actually works (merging is picked up), and validation.
writing-unit-tests
Use when writing, extending, or debugging Vitest unit tests anywhere in the Trilium monorepo — Preact components, jQuery widgets, client services, or the server/trilium-core backend. Covers how to render components (zero new deps), the easy-froca/becca fixtures, supertest API patterns, the honest coverage config, running a single test, and the known gotchas.
react-container-presentation-component
Create a React component using the Container/Presentation pattern in src/components by asking for the component name and type (ui or features), then scaffold files that follow this repository's TypeScript, Storybook, and SCSS conventions. Use when the user explicitly asks for a Container/Presentation-based component or runs /react-container-presentation-component.
generate-image
Generate images using AI. Use when asked to generate, create, or make images, textures, icons, sprites, artwork, visual assets, or mockups. Supports OpenAI (gpt-image-2) and Google Gemini (Nano Banana). Requires an API key for the chosen provider.