Builds security-focused full-stack web applications by implementing integrated frontend and backend components with layered security at every level. Covers the complete stack from database to UI, enforcing auth, input validation, output encoding, and parameterized queries across all layers. Use when implementing features across frontend and backend, building REST APIs with corresponding UI, connecting frontend components to backend endpoints, creating end-to-end data flows from database to UI, or implementing CRUD operations with UI forms. Distinct from frontend-only, backend-only, or API-only skills in that it simultaneously addresses all three perspectives—Frontend, Backend, and Security—within a single implementation workflow. Invoke for full-stack feature work, web app development, authenticated API routes with views, microservices, real-time features, monorepo architecture, or technology selection decisions.
9 projects use a version of this
12k11mo agoReviewMountCreate a free account to mount
Architect large or state-heavy Langfuse frontend features. Use for virtualized lists, large tables, controllers, Zustand stores, row selection, high-frequency state, rendering performance, or before adding useEffect, useMemo, useCallback, or form defaults derived from loaded data.
37k9d agoReviewMountCreate a free account to mount
Paperclip UI design system guide for building consistent, reusable frontend components. Use when creating new UI components, modifying existing ones, adding pages or features to the frontend, styling UI elements, or when you need to understand the design language and conventions. Covers: component creation, design tokens, typography, status/priority systems, composition patterns, and the /design-guide showcase page. Always use this skill alongside the frontend-design skill (for visual quality) and the web-design-guidelines skill (for web best practices).
Steady15 mentions in 2 weeks
14 projects use a version of this
114ktodayReviewMountCreate a free account to mount
Complete and maintain frontend i18n translations for this project. Covers finding missing translation keys, detecting untranslated entries, and adding translations for all supported locales (en, zh, zh-TW, fr, ja, ru, vi). Use for any task involving frontend locale files, missing translation keys, untranslated UI text, `t(...)` keys, `useTranslation()`, static i18n keys, button/label/ toast/dialog/placeholder/validation copy, or adding/fixing even a single i18n key. Use when review findings mention missing i18n, when new UI text needs translation, or when the user asks to add translations, fix i18n, or complete missing translations. Always load and follow this skill before translating, adding locale keys, or editing frontend i18n files.
Full-stack backend architecture and frontend-backend integration guide. TRIGGER when: building a full-stack app, creating REST API with frontend, scaffolding backend service, building todo app, building CRUD app, building real-time app, building chat app, Express + React, Next.js API, Node.js backend, Python backend, Go backend, designing service layers, implementing error handling, managing config/auth, setting up API clients, implementing auth flows, handling file uploads, adding real-time features (SSE/WebSocket), hardening for production. DO NOT TRIGGER when: pure frontend UI work, pure CSS/styling, database schema only.
14k8mo agoReviewMountCreate a free account to mount
How to roll Kortix PRODUCTION back to an older already-released version — the inverse of a release. Covers the one-dispatch rollback-prod.yml engine (--ref prod, shares the deploy-prod concurrency group), the per-surface mechanics (api with KORTIX_PROCESS_ROLE=all and the worker scaled to 0, gateway and ECS frontend = immutable :X.Y.Z image; Vercel frontend = promote), what undoes a rollback (any deploy-prod run, any push to prod), the DB/migration-drift check that is the real blocker, and how a later promote returns prod to latest. Load WHENEVER the user wants to roll back / revert / downgrade / 'go back a version' on prod, asks how the rollback or the frontend rebuild-skip behavior works, or needs to run rollback-prod.yml. Pairs with kortix-release (the forward direction).
Steady10 mentions in 2 weeks
1 project uses a version of this
21k7d agoReviewMountCreate a free account to mount
Structure and abstraction rules for PostHog UI code — any React component or frontend file under `frontend/src/` or `products/*/frontend/`. Use ALWAYS before creating, moving, splitting, or restructuring a component or frontend file, extracting a shared/generic component, promoting a component to `lib/`, renaming a frontend symbol or feature, or reviewing a diff that does any of these. Covers file and folder organization (one component per file, one home per symbol, no re-export shims or barrels), when duplication becomes a component and when a generic is premature, rename sweeps and the frozen-strings contract (event names, properties, flag keys, `data-attr` values are API), UI resolution states (loading, empty, and error are three different screens), and visual discipline (design tokens, on-brand custom components with no AI slop, real interactive elements, reduced motion, Storybook). Component choice (Lemon vs quill) lives in `frontend/src/AGENTS.md` Rule 1; state management in `/writing-kea-logics`.
41k2d agoReviewMountCreate a free account to mount
Start, inspect, restart, or stop an Onyx development stack with ODS. Prefer frontend-only previews for frontend-only diffs, shared infrastructure for ordinary work, and explicit isolation for independent datasets. Do not use for Kubernetes development.
Steady2 mentions in 2 weeks
1 project uses a version of this
33k7d agoReviewMountCreate a free account to mount
File layout for the conversations product. Use when adding, moving, renaming, or reviewing files under products/conversations/ — especially frontend components, scenes, helpers, and tests. Conversations React components live in their own folder under products/conversations/frontend/components/, never as loose files in components/ or at the frontend root. Expand this skill as more conversations layout rules land.
41k2d agoReviewMountCreate a free account to mount
Usage manual for building micro-frontend projects with qiankun 3.x. Use when the user wants to create a qiankun main (host) app or sub (micro) app, convert an existing Vite app into a qiankun micro app, or wire up micro-frontend loading with React/Vue.
17k4mo agoReviewMountCreate a free account to mount
Write and review React/TypeScript tests for Sentry's frontend using Jest and React Testing Library. Use when adding or editing tests in static/ (*.spec.tsx), writing component/hook tests, mocking API responses with MockApiClient, testing routing or network requests, or when asked to "write a frontend test", "add a React test", "test this component", or "fix a flaky RTL test".
19 projects use a version of this
46k5mo agoReviewMountCreate a free account to mount
Refactor avoidable React useEffect usage in Langfuse frontend code. Use when adding, reviewing, or removing effects; initializing forms or local UI state from query data; synchronizing client and server state; moving mutations or async workflows out of components; cleaning every effect from a frontend submodule; or reviewing whether an effect has a valid external-system owner.
No other project uses it yet
37k9d agoReviewMountCreate a free account to mount
Guides agents through a 6-step discovery process to design and deploy Google Cloud global external Application Load Balancers with Cloud CDN, Cloud Armor, and Service Extensions, mapping workload requirements to best-practice configurations. Use when: - Designing, configuring, or deploying a Google Cloud global external Application Load Balancer, Cloud CDN, Cloud Armor WAF, or Service Extensions. - Discovering existing Google Cloud resources (Cloud Storage, MIGs, GKE, Cloud Run) to use as backends. - Generating production-grade Terraform HCL or gcloud CLI scripts for global external Application Load Balancers. - Actuating deployments via Infrastructure Manager or bash scripts, including IAM pre-checks. - Detecting, analyzing, or reconciling configuration drift on deployed global external Application Load Balancers. Don't use for: - Non-Google Cloud load balancing or security configurations. - Purely regional or internal load balancing setups (unless part of a hybrid/failover global design).
24k48d agoReviewMountCreate a free account to mount
Explains Streamlit's internal architecture including backend runtime, frontend rendering, and WebSocket communication. Use when debugging cross-layer issues, understanding how features work end-to-end, planning architectural changes, or onboarding to the codebase. Covers ForwardMsg/BackMsg protocol, script rerun model, element tree, widget state management, and the delta-path rules shared by the frontend and the agent snapshot.
Steady4 mentions in 2 weeks
No other project uses it yet
46k12d agoReviewMountCreate a free account to mount
Use when migrating frontend code from manual API client calls (`api.get`, `api.create`, `api.surveys.get`, `api.dashboards.list`, `new ApiRequest()`) and handwritten TypeScript interfaces to generated API functions and types. Triggers on files importing from `lib/api`, files with `api.get<`, `api.create<`, `api.<entity>.<method>`, manual interface definitions that duplicate backend serializers, or any frontend file that constructs API URLs by hand. Covers the full replacement workflow — finding the generated equivalent, swapping imports, adapting call sites, and removing dead manual types.
41k2d agoReviewMountCreate a free account to mount
Review pull requests and code changes in La Suite Docs. Use when reviewing a PR, branch, diff, or set of changes in the Docs repository. Focus on correctness, regressions, security, permissions, collaborative editing/Yjs behavior, API contracts, database performance, frontend behavior, concurrency, deployment risks, and missing tests. Verifies frontend-side changes in a real browser automatically. Produce a concise review prioritizing actionable issues over style comments.
Steady5 mentions in 2 weeks
3 projects use a version of this
17k10d agoReviewMountCreate a free account to mount
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 or AGENTS.md?
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.
What is a skill?
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.
Can I search my own team's files too?
Your agents already can, over MCP, limited to the files you're allowed to read. Searching them from this page is coming.
JeffallanSkill
