antfu

Anthony Fu's opinionated tooling and conventions for JavaScript/TypeScript projects. Use when setting up new projects, configuring ESLint/Prettier alternatives, monorepos, library publishing, or when the user mentions Anthony Fu's preferences.

Nitro is the framework-agnostic server toolkit (powering Nuxt) for building and deploying web servers anywhere. Use when working with nitro.config, server routes/event handlers, route rules, caching, storage, tasks, websockets, or deploying to Node/Bun/Deno/Cloudflare/Vercel.

Nuxt full-stack Vue framework with SSR, auto-imports, and file-based routing. Use when working with Nuxt apps, server routes, useFetch, middleware, or hybrid rendering.

Node.js package manager with strict dependency resolution. Use when running pnpm specific commands, configuring workspaces via pnpm-workspace.yaml, or managing dependencies with catalogs, patches, overrides, config dependencies, or the global virtual store.

Create and present web-based slidedecks for developers using Slidev with Markdown, Vue components, code highlighting, animations, and interactive features. Use when building technical presentations, conference talks, code walkthroughs, teaching materials, or developer decks.

Bundle TypeScript and JavaScript libraries with blazing-fast speed powered by Rolldown. Use when building libraries, generating type declarations, bundling for multiple formats, or migrating from tsup.

Turborepo monorepo build system guidance. Triggers on: turbo.json, task pipelines, dependsOn, caching, remote cache, the "turbo" CLI, --filter, --affected, CI optimization, environment variables, internal packages, monorepo structure/best practices, and boundaries. Use when user: configures tasks/workflows/pipelines, creates packages, sets up monorepo, shares code between apps, runs changed/affected packages, debugs cache, or has apps/packages directories.

Vitest fast unit testing framework powered by Vite with Jest-compatible API. Use when writing tests, mocking, configuring coverage, or working with test filtering and fixtures.

Inspects a project's installed node_modules and produces three reports: duplicated packages (installed in multiple versions), packages sorted by install size, and maintenance actions (dep-upgrade opportunities + publint findings, grouped by consumer/author). Use when the user wants to audit dependencies, find duplicate packages, check what's taking up disk space in node_modules, identify outdated peer/prod dependencies that newer dependents could upgrade past, or list publint problems. Available as a CLI (`npx node-modules-inspector report <duplicates|sizes|maintainers> [--json]`) or an MCP stdio server (`npx node-modules-inspector mcp`) exposing the same three reports as agent tools. Works with pnpm, npm, and bun.

Manages ghfs local mirror files in `.ghfs/`, especially translating user instructions into valid execute operations (`execute.md`, `execute.yml`, or per-item edits), running `ghfs execute` / `ghfs sync`, and validating issue/PR batch edits. Use when tasks involve editing issues/PRs through `.ghfs` artifacts, reconciling sync state, or applying queued GitHub operations.

Queries npm package metadata via the fast-npm-meta CLI — resolves package versions, dist-tags, publish dates, engine requirements, and version range specifiers. Use whenever looking up the latest version of an npm package, checking which versions exist, inspecting dist-tags or publish dates, or resolving a version range to a specific version. Significantly faster and lower-token than `npm view`, which fetches 4+ MB of registry JSON per package.

Use when building or restyling devtools-style Vue 3 UIs with @antfu/design — wiring the composable UnoCSS preset, using the semantic token vocabulary (bg-base, color-base, badge-color-*, color-scale-*), choosing prefixed primitives (DisplayBadge, ActionButton, DisplayFilePath, OverlayModal, …), and keeping light/dark contrast and the "anti-slop" rules. Reach for it whenever generating or reviewing UI in a project that depends on @antfu/design.