Skills
99,448 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
Analyze project and generate or enhance build automation file (Makefile, Taskfile.yml, Justfile, Magefile.go). If a build file already exists, improves it by adding missing targets and best practices. Use when user says "generate makefile", "create taskfile", "add justfile", "setup mage", or "build automation".
Prototyper UI animation conventions. Use when writing, reviewing, or debugging animation/transition code: adding animations to new components, modifying transition classes, choosing easing or durations, implementing overlay enter/exit, adding press feedback, evaluating performance, or handling prefers-reduced-motion.
Reduce time-to-first-API-call (TTFAC) by optimizing every step of the developer onboarding journey. This skill covers authentication simplification, sandbox environments, interactive documentation, and identifying and eliminating common failure points. Trigger phrases: "API onboarding", "time to first API call", "TTFAC", "developer onboarding", "first API call", "auth simplification", "sandbox environment", "interactive docs", "try it now", "API playground", "developer activation", "onboarding friction"
Create Docker containers for Huawei Ascend NPU development with proper device mappings and volume mounts. Use when setting up Ascend development environments in Docker, running CANN applications in containers, or creating isolated NPU development workspaces. Supports privileged mode (default), basic mode, and full mode with profiling/logging. Auto-detects available NPU devices.
Send, receive, and manage email at scale with Amazon Simple Email Service (SES). Use when building email sending, identity verification, deliverability monitoring, email validation, tenant management, or multi-tenant email platforms. Covers V2 API patterns, DKIM/SPF/DMARC authentication, configuration sets, suppression lists, bounce/complaint handling, and dedicated IP management.
Help with BAdI (Business Add-In) development, the ABAP enhancement framework, and the clean core level classification of enhancement techniques. Covers new BAdIs, fallback classes, filter-based BAdIs, enhancement spots, enhancement implementations, key user extensibility, classic BAdIs, allowed vs. non-allowed enhancement technologies, and replacing modifications and implicit enhancements. Use when users ask about BAdI, BAdIs, Business Add-In, enhancement spot, enhancement implementation, enhancement framework, BAdI filter, BAdI fallback, BAdI definition, BAdI implementation, key user extensibility, custom logic injection, enhancement point, implicit enhancement, explicit enhancement, allowed enhancement technologies, user exit, customer exit, modification, or extending SAP standard code. Triggers include "create a BAdI", "implement a BAdI", "enhancement spot", "find a BAdI", "BAdI filter", "fallback class", "key user extensibility", "extend standard", "enhancement framework", "replace modification", "implicit enhancement", or "which level is this enhancement".
Use when spawning `Mesh3d` with `StandardMaterial`, writing a custom `Material` with `AsBindGroup` and a `.wesl` shader, enabling `shadow_maps_enabled` / `contact_shadows_enabled` on lights, adding `ContactShadows` or `ScreenSpaceTransmission` to a `Camera3d`, spawning an `Atmosphere` entity, loading glTF `#Material0/std` sub-assets, or fixing `#import` / `#ifdef` shader errors after the WESL switch in Bevy 0.20.
CCXT cryptocurrency exchange library for Java developers. Covers both REST API (standard) and WebSocket API (real-time). Helps install CCXT, connect to exchanges, fetch market data, place orders, stream live tickers/orderbooks, handle authentication, and manage errors in Java projects. Use when working with crypto exchanges in Java applications, trading systems, or financial software. Requires Java 21+.
Simplifies and refines code for clarity, consistency, and maintainability while preserving all functionality. Focuses on recently modified code unless instructed otherwise. This skill should be used when code-quality checks pass but the code would benefit from structural cleanup — deduplication, branching simplification, naming improvements, or dead-code removal. Invoked as a subagent from /code-quality or directly via the Task tool.
Expert in designing and implementing visceral, satisfying combat systems. Masters hitbox/hurtbox design, frame data, combo systems, enemy archetypes, damage feedback, and the invisible craft that makes players feel powerful. Draws from fighting games, character action games (DMC, Bayonetta), and Souls-like design to create combat that is readable, responsive, and endlessly replayable. Use when "combat system, combat design, hitbox, hurtbox, frame data, hitstop, screen shake, input buffer, coyote time, i-frames, invincibility frames, combo system, attack cancel, recovery frames, punishment window, souls-like combat, action game combat, fighting game, damage feedback, enemy design, boss design, attack telegraph, parry system, stamina system, poise system, weapon feel, game feel combat, melee combat, combat juice, combat, action-game, fighting-game, hitbox, frame-data, game-feel, souls-like, character-action, melee, enemy-design, boss-design, combo, parry, i-frames" mentioned.
Create and package React Router pull requests. Use when the user asks to create, open, prepare, or finish a PR for this repository, including branch/commit/push handoff, draft PR creation, PR body writing, and applying GitHub labels such as pkg:*, feat:*, docs, github-actions, or dependencies.
Audit and sync design tokens between the source of truth (tokens.json, Figma variables export) and the code that should consume them (Tailwind config, CSS custom properties, theme files). Finds drift -- hardcoded values, orphan tokens, out-of-date copies -- and fixes it in the right direction.
Provides comprehensive guidance for Django framework including models, views, templates, forms, admin, REST framework, and deployment. Use when the user asks about Django, needs to create Django applications, implement models and views, or build Django REST APIs.
Explain the design rationale and domain concepts behind the Ledger Device Management Kit (DMK) API, including Clear Signing, Secure Channel, Ledger OS (BOLOS), Device Actions vs Commands, sessions, transports, derivation paths, and Genuine Check. Use when a developer asks 'what is X?' about a DMK concept, 'why does X work this way?' about an API design decision, or 'what's the difference between X and Y?' for DMK components.
Map developer intent and natural language to the correct Ledger Device Management Kit (DMK) components, operations, and API methods. Use when a developer's request is phrased informally, incompletely, or in terms of outcomes rather than API methods, when the intent is ambiguous and needs mapping to a specific DMK component or operation, or when a developer asks 'how do I...', 'what's the difference between...', or describes a symptom rather than an API.
Expert embedded Rust development for ESP32 microcontrollers using no-std, Embassy async framework, and the ESP-RS ecosystem (esp-hal, esp-rtos, esp-radio). Use when building, debugging, flashing, or adding features to ESP32 projects. Covers sensor integration (ADC, GPIO, I2C, SPI), power management (deep sleep, RTC memory), WiFi networking, MQTT clients, display drivers, async task patterns, memory allocation, error handling, and dependency management. Ideal for LilyGO boards, Espressif chips (ESP32, ESP32-S3, ESP32-C3), and any no-std Xtensa/RISC-V embedded development.
Complete FFmpeg + OpenCV + Python integration guide for video processing pipelines. PROACTIVELY activate for: (1) FFmpeg to OpenCV frame handoff, (2) cv2.VideoCapture vs ffmpeg subprocess, (3) BGR/RGB color format conversion gotchas, (4) Frame dimension order img[y,x] vs img[x,y], (5) ffmpegcv GPU-accelerated video I/O, (6) VidGear multi-threaded streaming, (7) Decord batch video loading for ML, (8) PyAV frame-level processing, (9) Audio stream preservation with video filters, (10) Memory-efficient frame generators, (11) OpenCV + FFmpeg + Modal parallel processing, (12) Pipe frames between FFmpeg and OpenCV. Provides: Color format conversion patterns, coordinate system gotchas, library selection guide, memory management, subprocess pipe patterns, GPU-accelerated alternatives to cv2.VideoCapture. Ensures: Correct integration between FFmpeg and OpenCV without color/coordinate bugs. See also: ffmpeg-python-integration-reference for type-safe parameter mappings.
Bring a blocked React Router community pull request across the finish line. Use when the user invokes `/finish-line` or `$finish-line`, provides a PR number or URL, and asks Codex to resolve merge blockers such as a missing change file, missing documentation, missing tests, or stale contributor follow-up. Handles evaluating the blocker and pushing small maintainer fixes onto a contributor PR branch when authorized.
Use when working through architectural flaws documented in a paad/architecture-reviews/ report — selecting which flaws to fix, resuming a partial fix session across multiple sittings, or applying structural changes that need to be tracked back to a report. Not for producing that report — run /agentic-architecture first if there isn't one.
Review Flutter and Dart diffs, commits, pull requests, focused code scopes, or completed implementations for concrete defects and regression risks. Use for an explicit change review or bounded delivery review; report evidence without edits. Not for broad threat audits, performance diagnosis, or test authoring.
Index and routing table for this repository's Go skills: maps a task to the skill that owns it, names the secondary skills worth loading alongside, and draws the boundary between skills whose triggers overlap. Use when it is unclear which Go skill applies, when a task spans several concerns at once, when two skills seem to cover the same ground, or when the user asks what Go skills are available or wants a project configured to load them. Trigger examples: "which skill should I use", "what Go skills do you have", "is this concurrency or performance", "set up the Go skills for this repo". Not for: a task that already maps cleanly to one skill — load that skill directly.
Router for GSAP animation domain. Use when implementing animations with GreenSock Animation Platform including tweens, timelines, scroll-based animations, or React integration. Routes to 4 specialized skills for fundamentals, sequencing, ScrollTrigger, and React patterns.
Upgrades Unity projects between Meta XR SDK versions for Meta VR and Horizon OS. Use when moving from Oculus Integration or older com.meta.xr packages, resolving post-upgrade compile errors, or validating runtime behavior. Grounds migration decisions in current metavr documentation results and records coverage gaps instead of relying on static summaries. Do not use for Unreal, native Android, Spatial SDK, or WebXR upgrades.
Provides comprehensive guidance for adding Java code comments following industry standards and best practices. This skill helps add class-level comments, method-level comments, and field-level comments to Java code. Use when the user wants to add comments to Java code, needs to document Java classes/methods/fields, wants to improve code documentation, or needs to generate JavaDoc comments. This skill covers Controller, Service, ServiceImpl, Mapper, Model, Entity, BO (Business Object), DTO, VO, and other common Java component types. The skill follows a systematic workflow: scan codebase, identify components, create todo list, and add comments in order (class comments → method comments → field comments).
Use when you need to view the source code of a Java class from project dependencies, understand a library's API implementation, find method signatures, or explore how a dependency works internally. Accepts fully qualified or simple class names.
Check JFrog Public Catalog and stored packages for a version, interpret catalog security signals, and download through Artifactory (JFrog Platform locations, remote cache, curation-aware package managers, or repo proxy). Use when the user asks whether a package is safe, allowed, curated, or wants to download npm, Maven, PyPI, Go, or similar packages via JFrog. Do NOT use for pure CVE or vulnerability lookups (e.g. "details on CVE-2021-23337") — those are handled by the jfrog skill's Public security domain queries without this workflow.
MapStruct best-practice patterns. Distilled from the official Reference Guide, covering the three ways to define a Mapper (interface/abstract class/default method), Spring injection strategies (CONSTRUCTOR recommended / SETTER to resolve circular dependencies), nested mapping patterns (explicit sub-methods > one-off dot notation configuration), the safer choice of @Qualifier over @Named, Lombok integration rules, and cautious use of @MappingComposition. Corrects the most common LLM mistakes: using reflective BeanUtils instead of compile-time MapStruct, putting all nested mappings in a single method, and not knowing that SETTER resolves circular dependencies.
Distributed systems expert specializing in service decomposition, orchestration, and microservices architecture patterns. Use when designing microservices, defining service boundaries, implementing service mesh, or handling distributed system challenges. Triggers include "microservices", "service mesh", "service decomposition", "distributed systems", "API gateway", "event-driven".
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.