Tools

21st.dev's official MCP: lets agents search and fetch UI components, themes and template code from the 21st.dev community, and generate components from a description once AI access is enabled. Absorbs the former Magic MCP; requires a free API key from 21st.dev.

Google's official skills for building ADK agents: dev workflow, scaffolding, the ADK Python API, evaluation with LLM judges and adaptive rubrics, deployment to Agent Runtime, Cloud Run or GKE, publishing and observability. Works with agents-cli; local dev needs only an AI Studio key.

Anthropic's official OS-level sandbox CLI: restricts file and network access for agents, MCP servers and any command without containers, using sandbox-exec on macOS and bubblewrap on Linux. Currently a research preview.

Docker's official CLI for building images, running and managing containers, viewing logs and pushing to registries, a foundational tool for agents setting up isolated environments. Needs a local or remote Docker Engine such as Docker Desktop.

Zero-config CLI that sets up Claude Code and Codex in one go: an interactive menu handles installation, workflow imports, API and CCR proxy setup and common MCP servers, with model provider presets and bilingual English/Chinese configuration.

Applies Anthony Fu's conventions for JavaScript and TypeScript projects: file organization, explicit imports, Vitest style, @antfu/ni, @antfu/eslint-config with antislop, Knip, tsdown and a single ci script, mirroring the antfu/starter-ts template for new projects.

Reference for Nuxt 5, the full-stack Vue framework: directory layout, file-based routing, useFetch, auto-imports, server routes, rendering modes, SSR and hydration pitfalls, modules and layers, with notes on the move to Nitro v3 and Vite 8. Generated by Anthony Fu from the official docs.

Reference for Pinia v4, Vue's official state library: defining stores with state, getters and actions, plugins, composables, composing stores, testing with @pinia/testing, SSR, Nuxt and HMR. Recommends setup stores and storeToRefs. Generated by Anthony Fu from the official docs.

Reference for UnoCSS, the atomic CSS engine: config, rules, shortcuts, theme and variants, presets like Wind3, Wind4, Icons and Attributify, and Vite and Nuxt setup. Tells the agent to check uno.config first and stick to plain classes when unsure. Generated by Anthony Fu from official docs.

Reference for Vite 8: vite.config.ts, features like import.meta.glob and asset queries, the plugin API, library mode and SSR, the Environment API, and migrating to the Rolldown bundler and Oxc transformer. Prefers TypeScript config and ESM. Generated by Anthony Fu from the official docs.

Reference for VitePress 2, the Vite and Vue static site generator for docs: file routing, Markdown extensions and Vue in Markdown, data loaders, dynamic routes, theme config and custom themes, i18n, SSR compatibility and deployment. Generated by Anthony Fu from the official docs.

Reference for Vitest 5: config, CLI, the test, describe and expect APIs, hooks, mocking with vi, snapshots, coverage, fixtures, concurrency, filtering and tags, reporters, benchmarks, test environments, type testing and multi-project setups. Generated by Anthony Fu from the official docs.

Reference for Vue 3.5: script setup and macros such as defineProps, defineEmits and defineModel, reactivity, watchers and lifecycle, and built-ins like Transition, Teleport, Suspense and KeepAlive. Prefers the Composition API with TypeScript. Generated by Anthony Fu from the official docs.

Reference for pnpm 12: CLI, pnpm-workspace.yaml settings, monorepo workspaces, catalogs, overrides, patches, supply-chain settings such as build approval, task orchestration, CI setup and migration from npm, Yarn or older pnpm. Generated by Anthony Fu from the official docs.

Semi-automated research assistant for CS and AI researchers that links ideation, Zotero literature management, experiment analysis and reporting, paper writing and reviewer responses, and keeps project knowledge in Obsidian. Branches for Codex and other agents exist.

Semi-automated research workflow for computer science and AI researchers: ideation, Zotero literature management, experiment analysis and reports, paper writing and polishing, and rebuttals, with optional Obsidian knowledge base. 40+ skills; also installable as a Claude Code plugin.

Design engineering plugin for product interfaces such as admin panels and dashboards: builds UI on design principles and saves spacing, color and hierarchy decisions to .interface-design/system.md to stay consistent across sessions. Not meant for marketing pages.

Lossy PNG compression CLI: converts images to 8-bit PNGs that keep transparency, usually 60-80% smaller, with batch processing and a quality range setting. Handy for slimming down web assets, slides and article images. Install via Homebrew on macOS; no account.

Polishes existing motion against the transitions.dev token scale for duration, distance, scale, blur and easing, matching each value by what the motion does rather than the nearest number, with rules for open/close asymmetry, hover in and out, stagger and intent delays.

In-chat fallback for the transitions.dev Timeline Inspector's Refine button: the agent long-polls a local relay and answers jobs with motion-token tweaks or a full transition recipe swap, and applies accepted changes. Idle polling costs credits, so the persistent CLI mode is preferred.

draw.io's official MCP: opens XML, CSV or Mermaid diagrams generated by the agent directly in the draw.io editor, good for flowcharts and architecture diagrams. A no-install remote version can also render diagrams inline in the chat.

Community Playwright browser automation MCP from ExecuteAutomation (not Microsoft's official one): navigate, click, fill forms, screenshot and scrape page text, plus send HTTP requests, assert network responses and record actions into test code, with 143 device emulations built in.

Remotion's official skill that teaches agents to make programmatic videos in React code, covering project setup, animation and typography, captions, map animations, media handling and rendering, and routes to each subtopic on demand.

Lets agents generate production-ready Lottie animations (icon motion, loaders, data animations and more) from a text description or SVG, with a local player for live preview and tweaks. Export JSON for web, apps or After Effects. Needs Node.js locally.