Find the best CLAUDE.md, AGENTS.md and Claude skills

spreeSkill

pick-ui-library

spree/spree/.agents/skills/pick-ui-library/SKILL.md

Pick the right library for a given frontend task from a curated, opinionated list — numbers, OTP inputs, charts, command menus, virtualization, drag and drop, toasts, state, styling, and more. Only runs when explicitly invoked; it does not trigger on its own.

Often used withask-sonner·mobile-native·animation-performance

metabaseSkill

fe-modularization

metabase/metabase/.claude/skills/fe-modularization/SKILL.md

Deciding where frontend code lives — tier model, move mechanics, extension points, side effects, naming, and the traps. Use when moving code between modules, carving new modules, fixing boundary violations, adding a barrel or an endpoint, or reviewing module-shape decisions.

No other project uses it yet

ComposioHQSkill

artifacts-builder

ComposioHQ/awesome-claude-skills/artifacts-builder/SKILL.md

Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artifacts.

Often used withskill-share·twitter-algorithm-optimizer·lead-research-assistant

langflow-aiSkill

component-refactoring

langflow-ai/langflow/.agents/skills/component-refactoring/SKILL.md

Refactor high-complexity React components in Langflow frontend. Use when manual complexity assessment shows complexity > 50 or lineCount > 300, when the user asks for code splitting, hook extraction, or complexity reduction; avoid for simple/well-structured components, third-party wrappers, or when the user explicitly wants testing without refactoring.

SentrySkill

sentry-javascript-bugs

getsentry/sentry/.agents/skills/sentry-javascript-bugs/SKILL.md

Review Sentry React and TypeScript changes for bug patterns drawn from real production issues. Use when reviewing a frontend diff or PR, checking Warden findings, auditing the current branch, reviewing production-error patterns, or looking for common regressions in `static/`.

No other project uses it yet

backstageSkill

plugin-analytics-instrumentation

backstage/backstage/.agents/skills/plugin-analytics-instrumentation/SKILL.md

Instrument a Backstage frontend plugin with analytics events using the Backstage Analytics API. Use this skill when adding, reviewing, or extending event capture (`captureEvent`, `AnalyticsContext`) in plugin components, deciding whether an interaction warrants an event, or writing tests for analytics behavior.

frappeSkill

studio-app-building

frappe/frappe/skills/studio-app-building/SKILL.md

Build or edit Frappe Studio apps and pages, including block trees, data bindings, page scripts, design, and exported standard apps. Use for Studio App or Studio Page work, not ordinary Vue frontends.

ToolJetSkill

create-pr

ToolJet/ToolJet/.agents/skills/create-pr/SKILL.md

Pushes the ToolJet root repo and its submodules, creates or updates the submodule PRs (ee-server, ee-frontend), then creates or updates the main PR with a generated description. Use when the user asks to create, open, make, submit, or update a PR or pull request in ToolJet.

Often used withupdate-pr

PostHogSkill

integrating-with-posthog-ai

PostHog/posthog/.agents/skills/integrating-with-posthog-ai/SKILL.md

Wire a PostHog product surface into the PostHog AI agent from the frontend. Use when attaching scene or entity context, injecting instructions to steer the agent, reacting to the agent calling a tool, applying an agent edit back into an open form, or rendering a product tool card in a thread.

halo-devSkill

gradle-dependency-updates

halo-dev/halo/.claude/skills/gradle-dependency-updates/SKILL.md

Upgrade outdated Gradle dependencies in this project. Use this skill whenever the user asks to check for dependency updates, show what's outdated, or upgrade/bump/update Gradle dependencies, libraries, or plugins — including mentions of "dependencyUpdates", the versions plugin, or "outdated dependencies". Backend only (api/application/platform); frontend dependencies (ui/, pnpm) are out of scope.

langflow-aiReads credentialsSkill

backend-code-review

langflow-ai/langflow/.agents/skills/backend-code-review/SKILL.md

Review backend code for quality, security, maintainability, and best practices based on established checklist rules. Use when the user requests a review, analysis, or improvement of backend files (e.g., `.py`) under the `src/backend/` directory. Do NOT use for frontend files (e.g., `.tsx`, `.ts`, `.js`). Supports pending-change review, code snippets review, and file-focused review.

Arize-aiSkill

phoenix-design

Arize-ai/phoenix/.agents/skills/phoenix-design/SKILL.md

Design system conventions for the Phoenix frontend — layout, dialogs, error display, BEM CSS class naming, and CSS design tokens. Use when building UI, naming CSS classes, creating or consuming tokens, handling errors, or designing dialog interactions in js/app/src/.

No other project uses it yet

NangoHQDeletes or force-pushesSkill

ui-visual-debugging

NangoHQ/nango/.agents/skills/ui-visual-debugging/SKILL.md

Use when modifying or visually debugging Nango frontend UI, including packages/webapp, packages/connect-ui, browser interactions, screenshots, and visual regressions. Prefer browser-controlled or headless Playwright checks; use Peekaboo only for native macOS, visible-browser, or Accessibility tree inspection.

No other project uses it yet

CopilotKitSkill

copilotkit

CopilotKit/CopilotKit/skills/copilotkit/SKILL.md

Use for any CopilotKit question — adding it to an app, chat UI, frontend or server tools, generative UI, shared state, human-in-the-loop, agent frameworks (LangGraph, CrewAI, Mastra, ADK, PydanticAI, and others), the runtime, Intelligence, threads, voice, or diagnosing something that is not working. Do not answer from memory: this skill exists to point you at the current documentation and source, both of which you can read.

CopilotKitSkill

intelligence-docs

CopilotKit/CopilotKit/skills/intelligence-docs/SKILL.md

Keeps the CopilotKit Intelligence landing page in sync when a new Intelligence feature ships or when Intelligence docs are added, renamed, or removed. Use when adding Intelligence capabilities, writing or moving pages under docs/intelligence, editing IntelligenceFeatureCards, or changing snippets/shared/intelligence/overview.mdx. Don't use for OSS-only frontend docs, Inspector pane callouts, or marketing-site copy.

SentrySkill

feature-flags

getsentry/sentry/.agents/skills/feature-flags/SKILL.md

Gate a Sentry feature behind a FlagPole feature flag. Use when adding a feature flag, registering a flag in temporary.py, checking a flag from Python or the frontend, enabling a flag in tests, or asking where FlagPole rollout config lives. Trigger on "add a feature flag", "gate this behind a flag", "register a flag", "features.has", "api_expose", "OrganizationFeature", "ProjectFeature", "FlagPole".

langbot-appReads credentialsSkill

langbot-testing

langbot-app/LangBot/skills/skills/langbot-testing/SKILL.md

Test LangBot WebUI and core product flows with an automated browser and backend logs. Use when validating the configured LangBot frontend, pipeline Debug Chat, model provider setup and test buttons, bot and knowledge-base UI flows, or troubleshooting failed LangBot end-to-end tests.

No other project uses it yet

Arize-aiReads credentialsSkill

phoenix-pxi-playwright

Arize-ai/phoenix/.agents/skills/phoenix-pxi-playwright/SKILL.md

Write, extend, and debug PXI Playwright E2E tests for Phoenix. Use when adding PXI agent frontend specs, authoring LLM-as-judge rubrics, asserting PXI tool use, persisting PXI test runs as Phoenix experiments, or debugging PXI E2E failures.

No other project uses it yet

siteboonSkill

backend-module-standards

siteboon/claudecodeui/.agents/skills/backend-module-standards/SKILL.md

Enforce this repository's TypeScript backend module architecture standards. Use whenever creating, modifying, refactoring, or reviewing backend code under `server/`, including routes, services, modules, repositories, shared backend code, and backend tests. Do not apply these rules to frontend code or non-backend scaffolding.

dreamhunter2333Skill

cf-temp-mail-upgrade-dependencies

dreamhunter2333/cloudflare_temp_email/.agents/skills/cf-temp-mail-upgrade-dependencies/SKILL.md

Upgrade npm dependencies across all sub-packages of the project. Use when the user asks to upgrade/update dependencies, bump deps, refresh lockfiles, or update wrangler. Runs pnpm upgrades on frontend/, worker/, pages/, and vitepress-docs/, plus npm upgrades on e2e/.