Skills
97,222 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
Generate project documentation from codebase analysis — ARCHITECTURE.md, API_ENDPOINTS.md, DATABASE_SCHEMA.md. Reads source code, schema files, routes, and config to produce accurate, structured docs. Use when starting a project, onboarding contributors, or when docs are missing or stale. Triggers: 'generate docs', 'document architecture', 'create api docs', 'document schema', 'project documentation', 'write architecture doc'.
Use when working with Go slices, maps, or arrays—choosing between new and make, using append, declaring empty slices (nil vs literal for JSON), implementing sets with maps, and copying data at boundaries. Also use when building or manipulating collections, even if the user doesn't ask about allocation idioms. Does not cover concurrent data structure safety (see go-concurrency).
Use when designing a Go constructor or factory function with optional configuration—especially with 3+ optional parameters or extensible APIs. Also use when building a New* function that takes many settings, even if they don't mention “functional options” by name. Does not cover general function design (see go-functions).
Use when executing next-safe-action actions from React client components or building optimistic UI -- useAction, useOptimisticAction, useStateAction, useOptimisticStateAction, status/callbacks (onSuccess/onError/onSettled), execute vs executeAsync, formAction, reset, and queued or serialized mutations such as drag-to-reorder, Kanban boards, overlapping saves, accumulating changes, and shared pending-change lists
Use when writing or debugging UCharacterMovementComponent code: custom movement modes, floor detection, jumping, crouching, root motion, moving platforms, or client-side movement prediction. Also use when the user mentions 'CharacterMovementComponent', 'CMC', 'PhysCustom', 'PhysWalking', 'MOVE_Custom', 'FSavedMove_Character', 'GetCompressedFlags', 'FCharacterNetworkMoveData', 'MovementBase', 'LaunchCharacter', 'WalkableFloorAngle', 'SetGravityDirection', 'NavWalking', or 'FRootMotionSource'. For the Mover plugin, see ue-mover; for replication mechanics, see ue-networking-replication.
Use when writing conditionals, loops, or switch statements in Go—including if with initialization, early returns, for loop forms, range, switch, type switches, and blank identifier patterns. Also use when writing a simple if/else or for loop, even if the user doesn't mention guard clauses or variable scoping. Does not cover error flow patterns (see go-error-handling).
Fetch up-to-date library documentation via Context7 CLI. Use PROACTIVELY when: (1) Working with ANY external library (React, Next.js, Supabase, etc.) (2) User asks about library APIs, patterns, or best practices (3) Implementing features that rely on third-party packages (4) Debugging library-specific issues (5) Need current documentation beyond training data cutoff (6) AND MOST IMPORTANTLY, when you are installing dependencies, libraries, or frameworks you should ALWAYS check the docs to see what the latest versions are. Do not rely on outdated knowledge. Always prefer this over guessing library APIs or using outdated knowledge.
Add tree-sitter language support to codegraph end-to-end — wire the grammar + extractor, write tests, then benchmark extraction quality and retrieval value on 3 popular real-world repos. Use when the user runs /add-lang <language> or asks to add/support a new language (e.g. Lua, Elixir, Zig, OCaml) in codegraph.
CloudBase function runtime guide for building, deploying, and debugging your own Event Functions or HTTP Functions. Use when users need application runtime code on CloudBase, not when they are merely calling CloudBase official platform APIs.
Build UIs with React Spectrum S2 (Spectrum 2), Adobe's component library for React. Use when developers are using `@react-spectrum/s2` or need Adobe design system components. Includes React Aria Components docs as a reference for building custom components on top of unstyled primitives.
Use when generating world content or geometry procedurally in Unreal Engine: PCG graphs, custom PCG nodes in C++, runtime mesh building, instancing and seeded noise. Also use when the user mentions 'PCG', 'UPCGComponent', 'UPCGSettings', 'IPCGElement', 'UPCGBasePointData', 'surface sampler', 'static mesh spawner', 'runtime generation', 'CreateMeshSection', 'UProceduralMeshComponent', 'UDynamicMeshComponent', 'Geometry Script', 'AddInstance', 'HISM', 'spline mesh', 'PerlinNoise', 'FRandomStream', 'scatter foliage' or 'marching cubes'. For collision on generated geometry, see ue-physics-collision; for instance materials, see ue-materials-rendering; for background work, see ue-async-threading.
Use when setting up collision channels and profiles, running line/sweep/overlap queries, wiring hit and overlap events, or simulating rigid bodies in Unreal Engine C++. Also use when the user mentions 'collision channel', 'collision profile', 'LineTraceSingleByChannel', 'SweepSingleByChannel', 'OverlapMultiByObjectType', 'FHitResult', 'FCollisionQueryParams', 'FCollisionShape', 'OnComponentHit', 'OnComponentBeginOverlap', 'SetCollisionProfileName', 'SetSimulatePhysics', 'AddRadialImpulse', 'ragdoll', 'Chaos solver', 'ECC_GameTraceChannel1', or 'my overlap never fires'. For component attachment, see ue-actor-component-architecture; for capsule floor checks, see ue-character-movement
Perform evidence-backed impact analysis before changing code, data, interfaces, or governance documents, then compare the planned impact with the actual diff after implementation. Covers call paths, data and schema, API contracts, tests, documentation, ADRs, deployment, migration, and rollback. Use for cross-module or high-risk changes, database migrations, authentication, public interfaces, blast-radius questions, pre-change checks, and post-implementation alignment.
Builds, runs, debugs, and operates event-driven applications using EventBridge Event Bus - a managed, centrally governed publish/subscribe event bus that an organization can share across many teams and accounts. Applicable when workloads need event-driven architectures, decoupling, choreography, asynchronous integration, pub/sub, fan-out, event ordering, delivered in sequence, event router, event broker, event bus, event store, event retention, event replay, deduplication, avro, protobuf, cloudevents, uses events or messages. Designed as a centrally managed event bus platform allowing governance and control - such as subscriber control, revocation, per-account throttling - while giving application owners flexibility across an organization spanning multiple accounts, with end-to-end open-standards observability and cost allocation. Also helps reduce costs in high fan-out scenarios where multi-account forwarding adds cost. A serverless, managed alternative to self-managed event streaming platforms.
Document and type a Sentry API endpoint. Write or fix @extend_schema decorators, specify response TypedDicts, type request parameters, correct type drift between the declared schema and the runtime response, and validate the generated spec. Use when asked to "document an endpoint", "add OpenAPI docs", "add/fix @extend_schema", "type an endpoint response", "fix the response type", "fix type drift", "reuse a response type", "split an overloaded endpoint", "specify the response schema", "add a TypedDict response", "migrate a legacy api-docs path", "fix a parameter type", or "make an endpoint public" / "promote an endpoint" (promotion is one section here).
Build React animations with Motion (formerly Framer Motion) - gestures (drag, hover, tap), scroll effects, spring physics, layout animations, SVG, exit animations, and motion values. Use when: building React animations, adding hover/tap/drag interactions, scroll-triggered effects, layout transitions, shared element animations, exit animations with AnimatePresence, or working with motion values and springs. Triggers: "animate", "motion component", "framer motion", "gesture", "drag", "scroll animation", "layout animation", "exit animation", "spring", "whileHover", "whileTap", "whileInView", "AnimatePresence", "layoutId", "useScroll", "useSpring", "useAnimate", "motion value", "reorder", "parallax".
Package a finished local project into an intentional GitHub repository, create a strong README and visual preview, push it safely, configure a public GitHub Pages URL when the project is compatible, and verify the deployed result. Use when a user asks to upload, publish, open-source, share, or turn a local HTML/CSS/JavaScript experiment or small web project into a documented GitHub repository with a live demo.
Route C# and .NET requests to the exact installed specialist or smallest dotnet/skills marketplace plugin. USE FOR: "which specialist should own this" or "how do I add the skill" requests involving ASP.NET Core endpoints, Blazor, MAUI binding, Windows Forms specialist selection or installation, EF Core queries, test or framework migration, runtime CPU/allocation evidence, file-based C#, editor/compiler defects, a surviving MSBuild `.binlog`, or a plugin missing from `/skills`; also use for C# semantics when no narrower specialist exists. DO NOT USE FOR: requests that already name the exact installed specialist to invoke, or work unrelated to C# or .NET
React performance optimization guidelines. Use when writing, reviewing, or refactoring React components to ensure optimal rendering and bundle patterns. Triggers on tasks involving React components, hooks, memoization, or bundle optimization
Diagnoses and fixes performance problems specific to Capacitor apps—slow cold starts or long splash screens, white screens after camera use or backgrounding (WKWebView "WebView process terminated" reloads, Android onRenderProcessGone), large base64 payloads over the native bridge (Camera, Filesystem.readFile, CapacitorHttp), jank in the WebView, memory growth from unremoved plugin listeners, oversized Preferences storage, slow Android WebView versions, and debug logging left on in release. Covers profiling with Safari Web Inspector, chrome://inspect, Xcode Instruments, Android Studio Profiler, and adb timing commands. Do not use for crash or stack-trace debugging (use debugging-capacitor or capacitor-native-observability), device log capture (use ios-android-logs), offline data architecture (use capacitor-offline-first / sqlite-to-fast-sql), splash configuration details (use capacitor-splash-screen), or generic web performance unrelated to Capacitor.
Turn a finished, failed, or disappointing work cycle into portable lessons, anti-patterns, quality gates, and next-cycle vocabulary. Use after a build, QA pass, demo, user complaint, or abandoned attempt when the useful output is what the next pass must learn rather than the code itself.
Run the ECC engineering process retroactively against an existing project slice. Audit current state, reconstruct past decisions, produce a four-axis gap register (thinking, coding practice, missing features, technology selection), then execute fixes forward through the plan-TDD-review pipeline. Use when adopting ECC mid-project, taking over an inherited codebase, or asking what was missed and what would have been built differently from day one.
Use when building or maintaining real-time collaborative apps with the DeepSpace SDK on Cloudflare Workers; when code imports `deepspace`, `deepspace/worker`, or uses `RecordRoom`; when running `npx deepspace`; or when the task involves app.space deploys, live sync, presence, collaborative editing, RBAC, messaging, payments, Durable Objects, or DeepSpace source; or when creating or migrating native DeepSpace documentation with `documentation.json`, Markdown/MDX, the documentation feature, or an explicitly attached documentation domain.
When the user wants to add, audit, implement, or optimize Open Graph metadata for social sharing, including og:title, og:description, og:image, og:url, Facebook previews, LinkedIn previews, or social share previews. For a full metadata lifecycle use page-metadata; for X-specific previews use twitter-cards.
Run repeated build -> QA -> re0-memo -> re0-work cycles while preserving learning and letting code die. Use for long agentic projects where progress must be measured by quality-cleared templates, reusable modules, and eliminated anti-patterns rather than hours spent or features accumulated.
Use when implementing or debugging the Gameplay Ability System in C++ — abilities, effects, attributes, cues and the AbilitySystemComponent. Also use when the user mentions 'GAS', 'UGameplayAbility', 'ActivateAbility', 'CommitAbility', 'UGameplayEffect', 'UAttributeSet', 'FGameplayAttributeData', 'AbilitySystemComponent', 'InitAbilityActorInfo', 'GiveAbility', 'TryActivateAbility', 'ability task', 'GameplayCue', 'cooldown', 'cost', 'buff', 'debuff', 'damage execution' or 'ASC on PlayerState'. For montage playback, see ue-animation-system; for replication modes and prediction, see ue-networking-replication.
Use when the user mentions Jira issues (e.g., "PROJ-123"), asks about tickets, wants to create/view/update issues, check sprint status, or manage their Jira workflow. Triggers on keywords like "jira", "issue", "ticket", "sprint", "backlog", or issue key patterns.
Fetch the current tenant's allowed entitlements (BackgroundCheckTarget list). Returns JSON `{"allowedChecks":{key:label}}` — a map whose keys are the enabled entitlement keys. Called by sumsub-create-level (and other create-* skills) before building a payload to gate entitlement-required features.
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.