One search for your own team's files and the public ecosystem. See how real projects write their agent instructions, and bring the good ideas home.
addyosmaniSkilladdyosmani/agent-skills/skills/performance-optimization/SKILL.md
Optimizes application performance across frontend, backend, queries, and databases. Use when performance requirements exist, when you suspect performance regressions, when Core Web Vitals or load times need improvement, when N+1 query patterns need fixing, or when profiling reveals bottlenecks.
AnthropicSkillanthropics/skills/skills/web-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.
langgeniusSkilllanggenius/dify/.agents/skills/backend-code-review/SKILL.md
Use only when the user explicitly requests a review or audit of backend code under `api/`. Supports pending-change, file-focused, and pasted-diff reviews. Do not use for implementation-only requests, diagnosis without review intent, frontend code, or backend code outside `api/`.
ToolJetSkillToolJet/ToolJet/.agents/skills/create-pr/SKILL.md
TRIGGER when: user asks to create, open, make, submit, or update a PR/pull request in ToolJet. Pushes root + submodules, creates or updates submodule PRs (ee-server, ee-frontend), then creates the main PR with a generated description.
ComposioHQSkillComposioHQ/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.
SentrySkillgetsentry/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/`.
PostHogSkillPostHog/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.
SentrySkillgetsentry/sentry/.agents/skills/generate-snapshot-tests/SKILL.md
Generate snapshot test files for Sentry frontend React components. Use when asked to "generate snapshot tests", "add snapshot tests", "create visual snapshots", "write snapshot tests", "add visual regression tests", or "snapshot this component". Accepts an optional component path or name via $ARGUMENTS.
SentrySkillgetsentry/sentry/.agents/skills/migrate-container-queries/SKILL.md
Guide for migrating viewport media queries (@media, useMedia, and screen:-prefixed responsive props) to container queries in Sentry's frontend. Use when migrating responsive layout to container queries, replacing @media/useMedia/screen: breakpoints, refactoring styled responsive components to Container/Flex/Grid primitives, or working on the DE container-query migration.
SentrySkillgetsentry/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".
siteboonSkillsiteboon/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.
GitHubSkillgithub/awesome-copilot/skills/foundry-hosted-agent-copilotkit/SKILL.md
Ongoing development guidance for agentic web apps that pair a CopilotKit frontend with Microsoft Agent Framework agents on Azure AI Foundry hosted agents over the AG-UI protocol - add and gate agent tools, wire human-in-the-loop approvals, build generative UI and shared state, debug the event stream, upgrade pre-1.0 packages safely, and deploy hosted agent updates.
SentrySkillgetsentry/sentry/.agents/skills/analytics/SKILL.md
Instrument and discover analytics events in Sentry's frontend UI. Use when adding tracking to buttons, pages, modals, or custom interactions, when defining new analytics events, when searching for existing events, when auditing analytics coverage for a feature, or when answering questions about how users interact with a feature. Trigger on "add analytics", "track event", "instrument analytics", "analytics event", "track click", "track page view", "add tracking", "what events exist for", "audit analytics", "how many people", "how many users", "are people using", "is anyone clicking", "usage of", "who is using".
ToolJetSkillToolJet/ToolJet/.agents/skills/review-pr/SKILL.md
Review a ToolJet pull request of any size and produce a findings report the user reads first. Use when asked to review, look over, check, critique, or comment on a PR, a branch, or a diff, or to find blockers before merge. Starts by asking for review context (issue, spec, prior threads, known deviations), scales the process to the size of the diff, covers the root repo plus the ee-server and ee-frontend submodule PRs. Posting to GitHub is a separate, opt-in step the user asks for explicitly, never a default.
PostHogSkillPostHog/posthog/.agents/skills/qa-team/SKILL.md
Multi-agent QA review team for code changes. This skill should be used when the user asks to "review my code", "run QA", "qa-team", "review this branch", "code review", "check my changes", or wants a comprehensive multi-perspective code review of the current branch's changes. Spawns parallel specialist agents (security, database, reliability, compatibility, data integrity, performance, frontend, copy) that independently review the diff and produce a converged report. Also includes two generalist reviewers for convergence validation.
Untrivial-aiSkillUntrivial-ai/agent-orchestrator/.agents/skills/ao-desktop-dev/SKILL.md
Launch, restart, or troubleshoot the real AO Electron desktop app from this repository; run a checkout against isolated or real local AO data; combine PR branches for local UI review; and diagnose stale Electron processes, port conflicts, or preload bridge mismatches. Use whenever asked to run, open, show, or visually verify AO frontend changes in the actual desktop app rather than ao preview, dev:web, or mock data.
Untrivial-aiSkillUntrivial-ai/agent-orchestrator/.claude/skills/ao-desktop-dev/SKILL.md
Launch, restart, or troubleshoot the real AO Electron desktop app from this repository; run a checkout against isolated or real local AO data; combine PR branches for local UI review; and diagnose stale Electron processes, port conflicts, or preload bridge mismatches. Use whenever asked to run, open, show, or visually verify AO frontend changes in the actual desktop app rather than ao preview, dev:web, or mock data.
PostHogSkillPostHog/posthog/.agents/skills/posthog-desktop/SKILL.md
Scopes work to the desktop app at products/desktop — a nested standalone pnpm/turbo/Biome workspace imported from the now-archived PostHog/code repo, with posthog/posthog the only source of truth for PRs, CI and publishing, and not part of the root frontend or Django build. Use when the user says /posthog-desktop, or works on the Electron desktop app, apps/code, apps/web, apps/mobile, packages/core, packages/ui, packages/workspace-server, @posthog/api-client, @posthog/agent, or the agent framework. Pins the working directory to products/desktop, swaps in that tree's toolchain and conventions in place of the monorepo's, and defines the few paths outside the tree that may be touched (Django APIs the app calls, desktop-* CI at the root).
PostHogSkillPostHog/posthog/.agents/skills/visualizing-change-over-time/SKILL.md
Helps PostHog engineers and agents pick the right chart when a request is about visualizing change over time, before/after comparisons, or period-over-period movement while building UI with @posthog/quill-charts (dashboards, reports, the mcp_analytics frontend, custom visualizations). Use when a user asks how something "changed", "moved", "grew", "dropped", "improved", or "regressed" between two points or periods, or mentions "before/after", "period over period", "week over week", "delta", "slope graph", "slopegraph", or comparing many series across two snapshots. Surfaces both the `SlopeChart` quill component and the native `ChartDisplayType.SlopeGraph` insight display as options.
PostHogSkillPostHog/posthog/.agents/skills/triaging-web-analytics-support/SKILL.md
Triage web analytics support tickets end to end: enumerate open tickets from the in-app conversations product and their Zendesk mirrors, classify each into a diagnostic shape (frontend crash, "two numbers don't match", traffic count drop, tracker not loading / undercounting vs a competitor, ad-platform integration error, channel type misclassification), run the matching playbook, and produce reply drafts plus fix PRs where warranted. Use when asked to triage the web analytics support channel, investigate a web analytics Zendesk or conversations ticket, or explain metric discrepancies a customer reported. Internal-only: queries cross-customer support and usage data; never copy customer names or their traffic numbers into public artifacts (PRs, issues, commits).
Plain text files in a repository that tell a coding agent how the project works: commands to run, conventions to follow and things to avoid. CLAUDE.md, AGENTS.md, cursor rules and skills are the common kinds.
CLAUDE.md is read by Claude Code. AGENTS.md is an open format that Codex, Cursor and other agents read. Many projects keep one and point the other at it.
A folder with a SKILL.md that describes one capability, such as filling PDFs or reviewing code. The agent loads it only when the task calls for it.
Your agents already can, over MCP, limited to the files you're allowed to read. Searching them from this page is coming.
