Skills
101,174 packaged capabilities and playbooks for agents. Install any of them with one command.
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Turn a user-provided voiceover audio file + SRT subtitle into a finished, narration-synced MP4 using HyperFrames (HTML-to-video). The audio + SRT are the source of truth — scenes are timed to the SRT cues, content is read from the SRT, and the audio is muxed in automatically. Use when the user hands over an mp3/wav + srt and wants a video, says "把音频做成视频", "做一期视频", "audio + srt to video", "把这期早读做成视频", "render this narration into a video", or provides a recording + subtitles for an explainer / daily / 解读 / 口播. NOT for generating the voiceover (that's the user's job here) and NOT for slide decks (use a slides skill).
Designs Amazon A+ Content (formerly Enhanced Brand Content) — the 8 module suite that appears below the standard product carousel for Brand Registered sellers. Covers Hero Banner (21:9 / 2388×1024), Pain Points / Selling Points / Technology / Data / How-to-Use / Variants (3:2 / 1536×1024), and Endorsement (21:9), with mobile safe-area rule, 30pt text floor, and cross-module consistency anchored to the main image URL. Use when the user says "A+ page", "A+ content", "Amazon A+", "Brand Content", "Enhanced Brand Content", "亚马逊详情页", "A+ 详情页", "21:9 banner", "Hero Banner", "Amazon detail page module", or any request for the brand-registered detail-page module suite. For the 1:1 main image and carousel secondary images, see the `product-shots-main-image` skill.
Quality Editor — responsible for reviewing terminology consistency, citation completeness, and overall quality in review papers. Activates when assigned a review by a research lead or paper writer. Generates a review report and fixes issues found.
How to author custom PostHog Review skills: the review perspectives, blind-spot checks, validation criteria, and resolution criteria that drive PostHog Review's automated PR reviews. Use when a user wants a new review perspective (a specialist lens on their PRs), a custom blind-spot sweep, their own validation bar for which findings get published, or their own bar for which review comments get implemented. Trigger on "create a PostHog Review perspective", "custom review perspective", "my own blind-spot check", "custom validation criteria", "custom resolution criteria", "tune what PostHog Review publishes", "tune what PostHog Review implements".
Reviews the current local diff or branch at the end of a coding session for high-confidence bugs and repository instruction-file compliance. Use when asked to run `/review-pr` before commit, before push, or before handing changes off for PR creation or update, and when only certain, actionable findings should be reported while style feedback is ignored.
Runs the deterministic build_runner codegen pass (drift_dev, freezed, json_serializable, riverpod_generator) as one pinned command with --delete-conflicting-outputs, always before flutter analyze, never hand-editing or force-committing generated *.g.dart / *.freezed.dart / *.drift.dart output, watch only in local dev. Use when regenerating codegen, fixing "missing part file" / "conflicting outputs" / undefined generated-class analyzer errors, after editing a drift table or DAO, a freezed value object, a riverpod Notifier or provider, or a json_serializable model, or after a fresh git clone, branch switch, or pull.
Schedule meetings, deployments, and events respecting Shabbat, Israeli holidays (chagim), and Hebrew calendar constraints. Use when user asks to schedule around Shabbat, "zmanim", check Israeli holidays, plan around chagim, set Israeli business hours, or needs Hebrew calendar-aware scheduling logic. Includes halachic times (zmanim) via HebCal API, full Israeli holiday calendar, and Israeli business hour conventions. Do NOT use for religious halachic rulings (consult a rabbi) or diaspora 2-day holiday scheduling.
Rigorous adversarial review of AI-generated (or any) feature implementations and bug fixes. Challenges assumptions, hunts failure modes, and refuses rubber-stamp approval. Use whenever the user asks to review code, review a diff/PR/branch, review AI changes, do a skeptical/adversarial/strict review, verify a fix before merge, or wants you to find how the code can fail — even if they only say "review this" or "LGTM?" after an agent implementation. Prefer this over casual skim reviews when correctness matters.
This skill should be used when the user asks to "perform SMTP penetration testing", "enumerate email users", "test for open mail relays", "grab SMTP banners", "brute force email credentials", or "assess mail server security". It provides comprehensive techniques for testing SMTP server security.
Search external libraries and frameworks using Sourcebot MCP. Use when researching external code patterns, library APIs, framework examples, or documentation from repositories like Effect-TS/effect, vercel/ai, tanstack/query. NEVER use for local project code.
Comprehensive guide for implementing Syncfusion Angular Calendar components including Calendar, DatePicker, DateRangePicker, DateTimePicker, and TimePicker. Covers installation, data binding, date/time selection, range selection, formatting, localization, masking, validation, customization, templates, accessibility, and controlled component patterns in Angular applications.
Run developer customer discovery via a Technical Advisory Board (TAB). Use when the user has never interviewed a user who isn't a friend, is inventing messaging from a conference room, or is guessing at the roadmap instead of hearing the pain firsthand.
Use when a Three.js scene renders incorrectly: black screen, invisible objects, wrong colors, z-fighting, or broken shadows. Prevents the common mistake of wrong color space, missing material.side, or forgetting updateProjectionMatrix. Covers all common rendering errors with diagnosis steps and fix patterns. Keywords: black screen, invisible, wrong color, z-fighting, shadow artifact, rendering error, debug, nothing visible, dark, broken, nothing shows, model not appearing, screen is blank.
Use when adding post-processing effects like bloom, SSAO, depth of field, or anti-aliasing to a Three.js scene. Prevents the common mistake of mixing Three.js EffectComposer with pmndrs/postprocessing, wrong pass order, or missing RenderPass. Covers EffectComposer, 27+ passes, pmndrs/postprocessing, custom ShaderPass. Keywords: post-processing, EffectComposer, bloom, UnrealBloomPass, SSAO, outline, SMAA, FXAA, postprocessing, effects, render pass, glow effect, blur, cinematic, visual effects.
Planning skill that helps the developer pick the right Twilio messaging channel — SMS, MMS, RCS, or WhatsApp — for a given use case. Qualifies intent across content type, geography, use case (marketing / notifications / OTP / support), cost model, and brand presence. Use when the developer asks "which channel should I use", "SMS vs RCS vs WhatsApp", mentions a country or region, asks about branded messaging, rich content, or fallback — and proactively when the developer says "send SMS" or "text" but the use case (rich content, international reach, branded experience, marketing campaign, transactional notification) would benefit from a different or multi-channel approach. Also invoke alongside twilio-marketing-promotions-advisor or twilio-notifications-alerts-advisor whenever the developer has not yet confirmed a specific channel.
Build AI-powered voice agents using Twilio ConversationRelay. Handles real-time speech recognition (ASR), text-to-speech (TTS), and bidirectional audio streaming via WebSocket. Covers TwiML setup, WebSocket message types, LLM integration, streaming responses, and voice provider configuration. Use this skill to build voice bots, IVR replacements, or real-time AI voice assistants on Twilio calls.
Creates a reusable use case specification file that defines the business problem, stakeholders, and measurable success criteria for model customization, as recommended by the AWS Responsible AI Lens. Use as the default first step in any model customization plan. Skip only if the user explicitly declines or already has a use case specification to reuse. Captures problem statement, primary users, and LLM-as-a-Judge success tenets.
React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.
Writes and reviews native-quality Vietnamese (vi-VN) educational, school, academic, and EdTech communication — K-12 report-card remarks and học bạ entries, sổ liên lạc entries and school-to-parent broadcasts, pedagogical nudges, diagnostic pronunciation feedback, adaptive assessment, parental analytics reports, university syllabi (đề cương) and course registration, transcripts and GPA statements, diploma reissuance, thesis and academic notices. Use when drafting or reviewing Vietnamese content for a school, teacher, EdTech app, university, parent, or student audience, choosing thầy/cô-em versus thầy/cô-con versus quý phụ huynh, or applying MoET statutory grading terms (Thông tư 22/2021, 27/2020, 08/2021, 21/2019) and EdTech learning science frameworks. Do NOT use this skill for general software developer docs (use vietnamese-tech-writing) or for tutoring-centre and study-abroad advertising (use vietnamese-business-comms).
Work with the Webflow Designer API — either by building Designer Extensions (iframes inside the Webflow Designer) or by generating code snippets for the Designer API Playground. Covers element manipulation, styles, components, pages, variables, assets, error handling, CLI usage, and UI design patterns. Use when creating, debugging, or modifying Designer Extensions, OR when the user wants to run Designer API code in the Playground app.
Expert guide for WebGL API development including 3D graphics, shaders (GLSL), rendering pipeline, textures, buffers, performance optimization, and canvas rendering. Use when working with WebGL, 3D graphics, canvas rendering, shaders, GPU programming, or when user mentions WebGL, OpenGL ES, GLSL, vertex shaders, fragment shaders, texture mapping, or 3D web graphics.
Use when the user has a video + a target-language SRT and wants the video to actually speak that language — generates a time-aligned TTS voice dub. Routes by voice ID — Volcano (豆包) TTS for Chinese, edge-tts neural for any language. Defaults to one voice (single-speaker); opt-in multi-speaker via visual diarization. Outputs `*_<lang>_dub.mp4` with the dub audio in place of the original. Final mixing (audio bed + burn-in) is handed off to `/wjs-burning-subtitles`. Triggers — "配音", "中文配音", "Chinese dub", "voice over this", "dub the video", "TTS this SRT", "different voice for each speaker".
Use when modifying service config without full redeploy. Use when updating env vars and restarting single service. Use when user says "change env var", "update config", "fix variable without redeploying", "upgrade service version", "update image tag", or "change service tag".
Design rules and a checker for interfaces built with AI agents (dashboards, admin panels, SaaS screens). Use before building or changing any UI screen, component, button, form field, label, menu item, table or chart, and before reviewing UI changes: shared components with one look per element, sentence case, one type and radius scale, one selector language, focus and names for accessibility, locale-aware formatting, no generated-UI tells.
Builds enterprise React UIs with Ant Design (antd), including 60+ components (Button, Form, Table, Select, Modal, Message), design tokens, TypeScript support, and ConfigProvider theming. Use when the user needs to create React applications with Ant Design, build forms with validation, display data tables, or customize the Ant Design theme.
Use when integrating App Intents for Siri, Apple Intelligence, Shortcuts, Spotlight, or system experiences—covers AppIntent, AppEntity, parameter handling, entity queries, background execution, authentication, and debugging common integration issues for iOS 16+.
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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.