Skills
97,222 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
Use GitLab from the terminal without registering an MCP server. Covers authenticating the zereight-mcp-gitlab CLI (PAT or OAuth device flow) and reading merge requests, diffs, discussions, issues, and pipelines. Use when the user asks about a GitLab MR/issue/pipeline and no GitLab MCP tools are available, or wants CLI-only setup.
SSoT design draft: clarify the objects, permitted changes and invariants, and separate architectural and business responsibilities before writing the formal VDM. Read ssot first, then this skill; use for drafting or restructuring a design, not for implementing, checking or reviewing specifications.
Build two-way Google Calendar sync for a booking or scheduling app: hosts connect their Google account with OAuth, events on the calendars they choose block their availability, kept current by push notifications and a renewal cron, and confirmed bookings are written to their calendar as events, with Google Meet links when asked. Use when: (1) an app with bookings, appointments, classes or shifts must respect staff's Google Calendar busy time or put bookings into it, (2) an existing calendar sync shows phantom busy time, missed or duplicate events, group sessions blocked after the first booking, sync that stopped without an error, or users stuck after revoking access, (3) the user mentions: Google Calendar integration, two-way calendar sync, connect Google Calendar, busy time, free/busy, events.watch, push notifications, X-Goog-Channel-Token, channel renewal, calendar.events scope, refresh token, invalid_grant, offline access, PKCE, Google Meet link, conferenceData, extendedProperties, hangoutLink. Carries a dependency-free Google client on fetch, a pure busy-time mapper and diff, single-flight sync, idempotent booking events, make-before-break channel renewal, derived health per calendar, Firestore and Supabase stores, and a 32-test node:test suite run under four process time zones. Next.js App Router route handlers, with an Express adapter for other Node servers; storage, auth and the booking source are seams. Not Outlook or Microsoft 365 (microsoft-calendar-sync), not slot generation (time-slot-generator), not a calendar UI, not ICS feeds
Build two-way Microsoft 365 / Outlook calendar sync for a booking or scheduling backend over Microsoft Graph: hosts connect their Microsoft account with OAuth, events on chosen calendars block their availability (change-notification subscriptions plus a renewal cron), and confirmed bookings are written to their calendar as events, with Teams meeting links. Use when: (1) an app with bookings, appointments, classes or shifts must respect staff's Outlook busy time or put bookings into their Outlook calendar, (2) an existing Outlook or Graph calendar integration stops working an hour after connecting, never receives notifications, ignores vacations, duplicates events or loses its subscriptions, (3) the user mentions: Outlook calendar integration, Microsoft 365 calendar, Office 365 calendar sync, Microsoft Graph calendar, Entra ID app registration, Calendars.ReadWrite, calendarView, change notifications, Graph subscription, clientState, validationToken, lifecycleNotificationUrl, subscriptionRemoved, MSAL refresh token, AADSTS700082, invalid_grant, interaction_required, singleValueExtendedProperties, teamsForBusiness, showAs, isAllDay, mailboxSettings timeZone. Carries a dependency-free Graph client on fetch, a pure busy-time mapper that anchors all-day events to the mailbox zone, single-flight sync, booking events found again by an extended-property marker, in-place subscription renewal that replaces lost subscriptions, derived health per calendar, Firestore and Supabase stores, and a 43-test node:test suite run under four process time zones. TypeScript for Next.js App Router route handlers, with an Express adapter for any other Node server; storage, auth and the booking source are seams behind CalendarStore, authenticate and BookingSource. Not Google Calendar, not Exchange on-premises (EWS), not a calendar UI.
This skill should be used when the user asks to "create MongoDB model", "define Beanie document", "write MongoDB query", "create aggregation pipeline", "run database migration", "index MongoDB collection", or mentions Beanie, Motor, MongoDB documents, or async database operations. Provides MongoDB/Beanie ODM patterns for FastAPI.
This skill should be used when the user asks to "implement FSD", "use Feature-Sliced Design", "organize architecture", "structure project folders", "set up FSD layers", "create feature slices", "refactor to FSD", "add FSD structure", or mentions "feature slices", "layered architecture", "FSD methodology", "architectural organization", "views layer", "entities layer", "shared layer", "Next.js with FSD", or "Turborepo FSD structure". Provides comprehensive guidance for implementing Feature-Sliced Design methodology in Next.js applications with custom 'views' layer naming.
Comprehensive UX design patterns for Rails applications including responsive design, animations/transitions, dark mode, loading states, form UX, and performance optimization. Use this skill when implementing user-facing features requiring polished interactions and responsive layouts. Trigger keywords: UX, responsive, mobile-first, animation, transition, dark mode, loading, skeleton, progress, toast, form validation, performance, Core Web Vitals, user flow
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.