Agent Skills catalog · page 6
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anthropics/skills
webapp-testing
Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.
anthropics/skills
discernment-nudge
After you give a substantive answer or draft that the user may act on — advice or recommendations, drafted artifacts such as goals, plans, pitches, proposals, or emails, estimates or projections, analysis or interpretation of data, factual claims they may rely on, or a multi-step argument — invoke this skill BEFORE finalizing your reply and then, if it applies, append 2-3 short follow-up questions, each tied to something specific in what you just produced, that help the user check key facts, pro
vercel/next.js
insight-error-page
Write or audit an insight-kind error page for the Next.js dev overlay. Use when creating a new `errors/<slug>.mdx` page, auditing an existing one, or checking that a page matches the framework fix cards. Covers page structure, title alignment, FixCard cards with Copy prompt button, code snippets, terminology verification against canonical docs, and Vercel technical writing style.
vercel/next.js
next-cache-components-optimizer
Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then guards against regression. Use when asked to make a route's navigation instant (its static shell commits immediately), fix a route whose static shell isn't prerendered/served/prefet
vercel/next.js
write-guide
Generates technical guides that teach real-world use cases through progressive examples. **Auto-activation:** User asks to write, create, or draft a guide or tutorial. Also use when converting feature documentation, API references, or skill knowledge into step-by-step learning content. **Input sources:** Feature skills, API documentation, existing code examples, or user-provided specifications. **Output type:** A markdown guide with YAML frontmatter, introduction, 2-4 progressive steps, and next
vercel/next.js
next-cache-components-adoption
Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the `cacheComponents` flag, work through a flood of blocking-prerender / instant validation errors, run the `cache-components-instant-false` codemod, or decide between opting routes out with `export const instant = false` and fixing them in place.
vercel/next.js
next-rspack
Maintain @next/rspack-core and @next/rspack-binding packages. Use when editing rspack/package.json, rspack/crates/binding/Cargo.toml, rspack/rust-toolchain.toml, or packages/next-rspack/package.json. Covers upgrading @rspack/core npm version, rspack_* crate versions, Rust toolchain version, building and linking for local testing, and NEXT_RSPACK environment variable usage. Does NOT apply to root rust-toolchain.toml (that's for Turbopack).
vercel/next.js
router-act
How to write end-to-end tests using createRouterAct and LinkAccordion. Use when writing or modifying tests that need to control the timing of internal Next.js requests (like prefetches) or assert on their responses. Covers the act API, fixture patterns, prefetch control via LinkAccordion, fake clocks, and avoiding flaky testing patterns.
vercel/next.js
sandbox-bench
Benchmark React or Next.js changes on Vercel Sandbox VMs with paired A/B statistics: react PR/commit vs base, or Next.js PR/commit vs base, measured end-to-end through the bench/render-pipeline app (rps, latency, p95; TTFB, RSS and document/Flight bytes when the Next side captures them) and, for React changes, through the react repo's flight-ssr-bench fixture (Node AND Edge web-streams paths, Fizz and Flight+Fizz). Use whenever the user asks to bench, perf test, or A/B a React PR, a react-server
garrytan/gstack
autoplan
Auto-review pipeline — reads the full CEO, design, eng, and DX review skills from disk and runs them sequentially with auto-decisions using 6 decision principles. (gstack)
garrytan/gstack
design-review
Designer's eye QA: finds visual inconsistency, spacing issues, hierarchy problems, AI slop patterns, and slow interactions — then fixes them. (gstack)
garrytan/gstack
document-generate
Generate missing documentation from scratch for a feature, module, or entire project. (gstack)
garrytan/gstack
design-html
Design finalization: generates production-quality Pretext-native HTML/CSS. (gstack)
garrytan/gstack
design-shotgun
Design shotgun: generate multiple AI design variants, open a comparison board, collect structured feedback, and iterate. (gstack)
garrytan/gstack
ios-design-review
Visual design audit for iOS apps on real hardware. (gstack)
garrytan/gstack
benchmark-models
Cross-model benchmark for gstack skills. (gstack)
garrytan/gstack
devex-review
Live developer experience audit. (gstack)
garrytan/gstack
ios-clean
Remove the DebugBridge SPM package and all #if DEBUG wiring from an iOS app. (gstack)
garrytan/gstack
ios-sync
Regenerate the iOS debug bridge against the latest upstream gstack templates. (gstack)
garrytan/gstack
open-gstack-browser
Launch GStack Browser — AI-controlled Chromium with the sidebar extension baked in.
garrytan/gstack
plan-devex-review
Interactive developer experience plan review. (gstack)
garrytan/gstack
qa
Systematically QA test a web application and fix bugs found. (gstack)
garrytan/gstack
setup-browser-cookies
Import cookies from your real Chromium browser into the headless browse session. (gstack)
garrytan/gstack
setup-deploy
Configure deployment settings for /land-and-deploy.