emulate
Local drop-in replacement services for CI and no-network sandboxes. Fully stateful, production-fidelity API emulation. Not mocks.
A collection of skills for AI coding agents. Skills are packaged instructions and scripts that extend agent capabilities. Skills follow the Agent Skills format.
$ npx -y skills add vercel-labs/claude-skills --agent claude-code
Run the curl in your terminal, the rest in Claude Code.
Repo: vercel-labs/claude-skills
What's inside
A collection of skills for AI coding agents. Skills are packaged instructions and scripts that extend agent capabilities.
Skills follow the Agent Skills format.
Audits a Vercel project for cost, performance, reliability, caching, function usage, and billing opportunities. It collects Vercel metrics first, then investigates only the routes and files those metrics point to.
Use when:
React and Next.js performance optimization guidelines from Vercel Engineering. Contains 40+ rules across 8 categories, prioritized by impact.
Use when:
Categories covered:
Review UI code for compliance with web interface best practices. Audits your code for 100+ rules covering accessibility, performance, and UX.
Use when:
Categories covered:
Review docs and prose for compliance with the Vercel writing handbook. Audits your pages for 80+ rules covering voice, structure, content types, code samples, typography, and AI workflow.
Use when:
Categories covered:
easy/simple/quick)<Steps/>, 80-col / 25-line limits)snake_case text, count-up numbers, 64 KB/200 ms)--- rules, blank line discipline)React Native best practices optimized for AI agents. Contains 16 rules across 7 sections covering performance, architecture, and platform-specific patterns.
Use when:
Categories covered:
Implement smooth, native-feeling animations using React's View Transition API. Covers the <ViewTransition> component, addTransitionType, transition types, and Next.js integration including the transitionTypes prop on next/link.
Use when:
Topics covered:
<ViewTransition> component (enter, exit, update, share triggers)addTransitionType for directional/context-specific animationsname proptransitionTypes prop on next/linkprefers-reduced-motion)React composition patterns that scale. Helps avoid boolean prop proliferation through compound components, state lifting, and internal composition.
Use when:
Patterns covered:
Deploy applications and websites to Vercel instantly. Designed for use with claude.ai and Claude Desktop to enable deployments directly from conversations. Deployments are "claimable" - users can transfer ownership to their own Vercel account.
Use when:
Features:
package.jsonnode_modules and .git from uploadsHow it works:
Output:
Deployment successful!
Preview URL: https://skill-deploy-abc123.vercel.app
Claim URL: https://vercel.com/claim-deployment?code=...
npx skills add vercel-labs/agent-skills
Skills are automatically available once installed. The agent will use them when relevant tasks are detected.
Examples:
Deploy my app
Review this React component for performance issues
Help me optimize this Next.js page
Each skill contains:
SKILL.md - Instructions for the agentscripts/ - Helper scripts for automation (optional)references/ - Supporting documentation (optional)MIT
.github/
workflows/
react-best-practices-ci.yml
.gitignore
AGENTS.md
CLAUDE.md
packages/
react-best-practices-build/
.gitignore
package.json
pnpm-lock.yaml
src/
build.ts
config.ts
extract-tests.ts
migrate.ts
parser.ts
types.ts
validate.ts
test-cases.json
tsconfig.json
vercel-optimize-tests/
package.json
test/
account-scope-grading.test.mjs
budget-summary.test.mjs
build-minutes-fanout.test.mjs
cache-components-suspense-dedupe.test.mjs
check-citations-script.test.mjs
citations.test.mjs
cold-start-revival.test.mjs
collect-framework-preflight.test.mjs
collect-sub-agent-outputs.test.mjs
collection-command-docs.test.mjs
cost-coverage.test.mjs
dedup-recs.test.mjs
deep-dive-extract.test.mjs
deep-dive.test.mjs
display-labels.test.mjs
edge-heavy-import.test.mjs
fixtures/
real-cli-output/
contract-commitments-empty-200.txt
contract-empty-commitments.json
deep-dive/
README.md
slow_route_latency_p95.json
slow_route_perDeployment.json
slow_route_startTypeSplit.json
slow_route_statusDist.json
uncached_route_cacheBreakdown.json
metrics-bot-id-checks.json
metrics-cwv-cls-by-route.json
metrics-cwv-count-by-route.json
metrics-cwv-count.json
metrics-cwv-inp-by-route.json
metrics-cwv-lcp-by-route.json
metrics-cwv-ttfb-by-route.json
metrics-error-invalid-dimension.json
metrics-ext-api-p75.json
metrics-external-api-bytes.json
metrics-external-api-count.json
metrics-fdt-by-bot.json
metrics-fdt-by-cache.json
metrics-fdt-by-route.json
metrics-firewall-by-action.json
metrics-fn-count-by-route-http-status.json
metrics-fn-cpu-by-route.json
metrics-fn-duration-p95-by-route.json
metrics-fn-gbhr-by-route.json
metrics-fn-peak-memory-by-route.json
metrics-fn-provisioned-memory-by-route.json
metrics-fn-start-type-by-route.json
metrics-fn-ttfb-p95-by-route.json
metrics-image-by-host.json
metrics-image-count.json
metrics-image-source-bytes.json
metrics-isr-reads-by-route.json
metrics-isr-writes-by-route.json
metrics-middleware-count.json
metrics-middleware-duration-p95.json
metrics-request-count-by-route-method.json
metrics-request-count-group-by-http-status.json
metrics-request-count-group-by-route-cache.json
metrics-request-count-group-by-route.json
metrics-request-count-since-30d.json
metrics-schema.json
project-v9.json
README.md
usage-404-stderr.txt
signals.hobby.json
signals.pro-oplus.json
flags-gate.test.mjs
framework-support.test.mjs
gate-contract.test.mjs
gate-selection.test.mjs
gate.test.mjs
grade-and-verify.test.mjs
hallucination-probe.test.mjs
impact-label.test.mjs
impact-magnitude.test.mjs
infer-plan.test.mjs
investigation-brief.test.mjs
large-static-asset.test.mjs
merge-signals.test.mjs
new-gates.test.mjs
observability-events-attribution.test.mjs
observability-preflight.test.mjs
observations.test.mjs
oplus-diagnose.test.mjs
prepare-investigation-brief-cli.test.mjs
project-config-contradict.test.mjs
project-facts.test.mjs
public-release-safety.test.mjs
queries.test.mjs
reconcile-candidates-cli.test.mjs
reconcile-candidates.test.mjs
reconcile-pipeline.test.mjs
region-misconfig.test.mjs
region-pin-in-config.test.mjs
render-report.test.mjs
repo-root.test.mjs
route-errors.test.mjs
route-normalize.test.mjs
route-shape-warnings.test.mjs
sanitizers.test.mjs
scan-codebase-layouts.test.mjs
slow-route-5xx-disqualify.test.mjs
support-topics.test.mjs
sveltekit-parity.test.mjs
throttle.test.mjs
time-window.test.mjs
turbo-force-bypass.test.mjs
uncached-route-method-filter.test.mjs
unoptimized-image-ext.test.mjs
usage-spike-triage.test.mjs
use-cache-date-stamp.test.mjs
vercel-command.test.mjs
vercel-redaction.test.mjs
verify-and-regen-cli.test.mjs
voice-drift.test.mjs
workspace-resolver.test.mjs
README.md
skills/
skills.sh.json
composition-patterns/
AGENTS.md
metadata.json
README.md
rules/
_sections.md
_template.md
architecture-avoid-boolean-props.md
architecture-compound-components.md
patterns-children-over-render-props.md
patterns-explicit-variants.md
react19-no-forwardref.md
state-context-interface.md
state-decouple-implementation.md
state-lift-state.md
SKILL.md
deploy-to-vercel/
deploy-to-vercel.zip
Archive.zip
resources/
deploy-codex.sh
deploy.sh
SKILL.md
react-best-practices/
react-best-practices.zip
AGENTS.md
metadata.json
README.md
rules/
_sections.md
_template.md
advanced-effect-event-deps.md
advanced-event-handler-refs.md
advanced-init-once.md
advanced-use-latest.md
async-api-routes.md
async-cheap-condition-before-await.md
async-defer-await.md
async-dependencies.md
async-parallel.md
async-suspense-boundaries.md
bundle-analyzable-paths.md
bundle-barrel-imports.md
bundle-conditional.md
bundle-defer-third-party.md
bundle-dynamic-imports.md
bundle-preload.md
client-event-listeners.md
client-localstorage-schema.md
client-passive-event-listeners.md
client-swr-dedup.md
js-batch-dom-css.md
js-cache-function-results.md
js-cache-property-access.md
js-cache-storage.md
js-combine-iterations.md
js-early-exit.md
js-flatmap-filter.md
js-hoist-regexp.md
js-index-maps.md
js-length-check-first.md
js-min-max-loop.md
js-request-idle-callback.md
js-set-map-lookups.md
js-tosorted-immutable.md
rendering-activity.md
rendering-animate-svg-wrapper.md
rendering-conditional-render.md
rendering-content-visibility.md
rendering-hoist-jsx.md
rendering-hydration-no-flicker.md
rendering-hydration-suppress-warning.md
rendering-resource-hints.md
rendering-script-defer-async.md
rendering-svg-precision.md
rendering-usetransition-loading.md
rerender-defer-reads.md
rerender-dependencies.md
rerender-derived-state-no-effect.md
rerender-derived-state.md
rerender-functional-setstate.md
rerender-lazy-state-init.md
rerender-memo-with-default-value.md
rerender-memo.md
rerender-move-effect-to-event.md
rerender-no-inline-components.md
rerender-simple-expression-in-memo.md
rerender-split-combined-hooks.md
rerender-transitions.md
rerender-use-deferred-value.md
rerender-use-ref-transient-values.md
server-after-nonblocking.md
server-auth-actions.md
server-cache-lru.md
server-cache-react.md
server-dedup-props.md
server-hoist-static-io.md
server-no-shared-module-state.md
server-parallel-fetching.md
server-parallel-nested-fetching.md
server-serialization.md
SKILL.md
react-native-skills/
AGENTS.md
metadata.json
README.md
rules/
_sections.md
_template.md
animation-derived-value.md
animation-gesture-detector-press.md
animation-gpu-properties.md
design-system-compound-components.md
fonts-config-plugin.md
imports-design-system-folder.md
js-hoist-intl.md
list-performance-callbacks.md
list-performance-function-references.md
list-performance-images.md
list-performance-inline-objects.md
list-performance-item-expensive.md
list-performance-item-memo.md
list-performance-item-types.md
list-performance-virtualize.md
monorepo-native-deps-in-app.md
monorepo-single-dependency-versions.md
navigation-native-navigators.md
react-compiler-destructure-functions.md
react-compiler-reanimated-shared-values.md
react-state-dispatcher.md
react-state-fallback.md
react-state-minimize.md
rendering-no-falsy-and.md
rendering-text-in-text-component.md
scroll-position-no-state.md
state-ground-truth.md
ui-expo-image.md
ui-image-gallery.md
ui-measure-views.md
ui-menus.md
ui-native-modals.md
ui-pressable.md
ui-safe-area-scroll.md
ui-scrollview-content-inset.md
ui-styling.md
SKILL.md
react-view-transitions/
react-view-transitions.zip
AGENTS.md
metadata.json
README.md
references/
css-recipes.md
implementation.md
nextjs.md
patterns.md
SKILL.md
vercel-cli-with-tokens/
vercel-cli-with-tokens.zip
SKILL.md
vercel-optimize/
AGENTS.md
CONTRIBUTING.md
lib/
auth-route.mjs
budget-summary.mjs
citations.mjs
cost-coverage.mjs
dedup-recs.mjs
deep-dive.mjs
display-labels.mjs
extract-claims.mjs
framework-support.mjs
gates/
build-minutes-fanout.mjs
cold-start.mjs
contract.mjs
cwv-poor.mjs
external-api-slow.mjs
hard-gates.mjs
index.mjs
isr-overrevalidation.mjs
middleware-heavy.mjs
observability-events-attribution.mjs
platform-bot-protection.mjs
platform-fluid-compute.mjs
region-misconfig.mjs
route-errors.mjs
scanner-driven.mjs
select-candidates.mjs
slow-route.mjs
types.d.ts
uncached-route.mjs
usage-spike-triage.mjs
grade-recommendation.mjs
impact-label.mjs
impact-magnitude.mjs
investigation-brief.mjs
observation-safety.mjs
project-facts.mjs
queries.mjs
reconcile-candidates.mjs
render-report.mjs
repo-root.mjs
route-normalize.mjs
sanitizers/
bot-protection-certainty.mjs
cache-tag-invalidation-certainty.mjs
count-correct.mjs
function-duration-invocations.mjs
index.mjs
middleware-conflict.mjs
missing-citation.mjs
pre-release.mjs
rate-limit.mjs
rendering-mode-mislabel.mjs
undeclared-dep.mjs
vercel-directive-strip.mjs
window-units.mjs
scanners/
cache-components-suspense-dedupe.mjs
edge-heavy-import.mjs
force-dynamic.mjs
headers-in-page.mjs
index.mjs
large-static-asset.mjs
max-age-without-s-maxage.mjs
middleware-broad-matcher.mjs
missing-cache-headers.mjs
prisma-include-tree.mjs
region-pin-in-config.mjs
source-maps-production.mjs
sveltekit-prerender-missing.mjs
turbo-force-bypass.mjs
unoptimized-image.mjs
use-cache-date-stamp.mjs
support-topics.mjs
throttle.mjs
util.mjs
vercel.mjs
verify-claim.mjs
workspace-resolver.mjs
metadata.json
README.md
references/
candidates.md
data-collection.md
docs-library.json
doctrine.md
observability-plus.md
playbooks/
ai-application.md
api-service.md
content-site.md
ecommerce.md
... 75 moreLocal drop-in replacement services for CI and no-network sandboxes. Fully stateful, production-fidelity API emulation. Not mocks.
Browser automation CLI for AI agents. Fast native Rust CLI.
The Generative UI framework. Generate dynamic, personalized UIs from prompts without sacrificing reliability. Predefined components and actions for safe, predictable output.
FAQ
vercel-labs-agent-skills is a Claude Code plugin with 9 hand-picked skills for development work, indexed on Flowy. Install it with the command on its page. It includes composition-patterns, deploy-to-vercel, react-best-practices. Its skills do not fire on their own yet. Request auto-invocation to have Flowy route them as you prompt. Free and open source.