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Comprehensive guide for contributing to WordPress core development, including environment setup, coding standards, hooks system, database API, REST API, testing, and Trac workflow.

Comprehensive guide for developing WebExtensions (browser extensions) for Mozilla Firefox, including Manifest V2/V3 configuration, all WebExtension APIs, security practices, web-ext CLI, and AMO submission.

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Comprehensive guide for developing MailExtensions for Mozilla Thunderbird, including Manifest V2/V3 configuration, all messenger.* APIs, UI actions, Experiment APIs, and ATN submission.

BPCore Engine - Lua game framework for Gameboy Advance with sprites, tilemaps, entities, collision, audio, multiplayer

Django Bolt - Rust-powered high-performance API framework, 60k+ RPS, decorator routing, built-in auth, async ORM

Build modern dynamic web applications with Django and htmx - partial rendering, HTMX-specific responses, and seamless frontend integration

Visual regression testing using Playwright with toHaveScreenshot(), masking, thresholds, cross-browser testing, and VUDA integration for AI-powered visual analysis

PyQt/PySide6 overview hub - installation, comparison, project structure. See sub-skills for detailed topics.

PyQt/PySide6 QSS styling - selectors, properties, pseudo-states, dark theme, widget-specific styles

PyQt/PySide6 testing with pytest-qt - qtbot fixture, waitSignal, mouse/keyboard simulation, dialog testing

Python testing framework with powerful fixtures, parametrization, extensive plugin ecosystem, and support for async, Django, Flask testing

Common Rust development pitfalls: frequent compiler errors, struct constructor patterns, test organization, and coverage enforcement for reliable codebases.

Generate a batch of social media video prompts for multiple platforms from a single input. Use this skill whenever the user wants to create videos for multiple social platforms at once, repurpose one video across platforms, or create a social media video campaign. Trigger on phrases like 'social media videos', 'videos for all platforms', 'Instagram and TikTok video', 'social campaign', 'batch of social videos', 'repurpose this for social', 'video for every platform', 'social clips', 'create Reels and Shorts', 'multi-platform video', or any request involving creating short-form video content for multiple social media platforms using Ozor.

项目收尾检查。在项目完成后、再次打开前执行：多角色文档审查 + 追踪台核查 + 遗留事项清点，输出收尾报告。与 project-retrospective 的区别：本 Skill 检查文档一致性和遗留问题，后者更新 Skill 体系。触发词：「项目收尾」「收尾检查」「确保文档自洽」。

项目级 Skill 批量复盘。在一个项目/任务闭环完成后，主动扫描本次对话中调用过的所有 Skill，逐个判断是否需要新建或更新，批量调用 skill-capture-closure 完成沉淀，最后输出复盘报告。触发词：「项目做完了」「更新一下Skill」「基于刚刚的过程更新规范」「做个项目复盘」「沉淀一下经验」「把这次的经验记下来」。

任务结束后的统一复盘入口，同时覆盖「修改」（识别并修复 B/K 对象缺陷）和「沉淀」（将新经验/洞见写入对应 B/K 对象）两个方向。主分类轴：B-object（Skill/Rule/Agent）vs K-object（原则/框架/规范/项目规格/碎片），操作类型：modify（修改已有）或 create（新建沉淀）。触发词：「复盘一下」「做个复盘」「这次踩坑了」「这个经验值得记」「跑通了」「总结经验」「沉淀一下」「记录一下这次」。注意：项目级批量复盘请触发 project-retrospective。

测试环境自动准备 Skill。在执行任何测试之前，自动检查并准备完整的测试环境：服务健康检查、自动启动后端、数据库就绪、测试账号创建、依赖验证。确保后续测试在稳定环境中执行。触发词：「准备测试环境」「环境预检」「初始化测试环境」「测试前准备」。也被 role-测试工程师 Step 0 和 fixer Step A0/B0 自动调用。

指导 AI 正确执行跨项目联动通知。当任务涉及①公理体系变动、②体系结构变动、TF变动、分身数据格式变动、产品设计变动时触发。对应 AGENT_RULES.md 第六节和 06_全链路联动规则.md。

Use when the user asks about NixOS, Nix language, flakes, nixpkgs, configuration.nix, nixos-rebuild, modules, options, overlays, derivations, mkDerivation, callPackage, home-manager, nix-darwin, devenv, packaging, cross-compilation, binary caches, garbage collection, NixOS containers, networking, firewall, systemd services, filesystems, LUKS, Wayland, X11, kernel, profiles, NixOS testing or VM tests, ISO images, Docker images, Raspberry Pi, Terraform, distributed builds, remote machines, pinning nixpkgs, rollback, generations, Nix Pills, or any topic related to configuring, packaging, deploying, or troubleshooting NixOS and the Nix ecosystem.

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iOS security best practices including Keychain Services, biometrics, data protection, network security, and App Attest

Unit testing, UI testing, TDD patterns, mocking, and test doubles for VIP+W architecture

VIP+W (View-Interactor-Presenter-Worker) Clean Architecture for iOS with unidirectional data flow and proper separation of concerns

Analyze Swift Package Manager dependencies, package plugins, module variants, and CI-oriented build overhead that slow Xcode builds. Use when a developer suspects packages, plugins, or dependency graph shape are hurting clean or incremental build performance, mentions SPM slowness, package resolution time, build plugin overhead, duplicate module builds from configuration drift, circular dependencies between modules, oversized modules needing splitting, or modularization best practices.

Systematically scan Apple's developer documentation via the Sosumi MCP, identify deprecated SwiftUI APIs and their modern replacements, and update `swiftui-expert-skill/references/latest-apis.md`.

This skill provides expert guidance on Swift Testing, covering the modern Swift Testing framework, test doubles (mocks, stubs, spies), fixtures, integration testing, snapshot testing, and migration fr

'Expert guidance on iOS accessibility best practices, patterns, and implementation. Use when developers mention: (1) iOS accessibility, VoiceOver, Dynamic Type, or assistive technologies, (2) accessibility labels, traits, hints, or values, (3) automated accessibility testing, auditing, or manual testing, (4) Switch Control, Voice Control, or Full Keyboard Access, (5) inclusive design or accessibility culture, (6) making apps work for users with disabilities.'

Translate Figma designs into production-ready SwiftUI code with 1:1 visual fidelity using the Figma MCP workflow. Trigger when the user provides Figma URLs or node IDs and wants iOS/SwiftUI implementation, asks to implement a design or component from Figma for an iOS app, or references Figma selections in the context of an Xcode/SwiftUI project. Also trigger when user asks to inspect Figma designs for iOS planning, fetch design tokens for SwiftUI, or convert Figma assets for Xcode. Requires a working Figma MCP server connection. Do NOT trigger for web/React implementations.

Parallel read-only multi-agent root-cause investigation for bugs, regressions, crashes, flaky behavior, or unexplained failures. Use when the user asks to investigate a bug, find the root cause, trace a regression, understand why something broke, or wants a ranked diagnosis with the fastest proof path without making code edits.

Build CarPlay-enabled apps using the CarPlay framework. Use when creating navigation, audio, communication, EV charging, parking, or food ordering apps for the car display, working with CPTemplateApplicationScene, CPListTemplate, CPMapTemplate, CPNowPlayingTemplate, configuring CarPlay entitlements, or integrating with CarPlay Simulator for testing.

Verify device legitimacy and app integrity using DeviceCheck (DCDevice per-device bits) and App Attest (DCAppAttestService key generation, attestation, and assertion flows). Use when implementing fraud prevention, detecting compromised devices, validating app authenticity with Apple's servers, protecting sensitive API endpoints with attested requests, or adding device verification to a backend architecture.

Create child communication safety experiences using PermissionKit to request parental permission for children. Use when building apps that involve child-to-contact communication, need to check communication limits, request parent/guardian approval, or handle permission responses for minors.

Apply modern Swift language patterns and idioms for non-concurrency, non-SwiftUI code. Covers if/switch expressions (Swift 5.9+), typed throws (Swift 6+), result builders, property wrappers, opaque and existential types (some vs any), guard patterns, Never type, Regex builders (Swift 5.7+), Codable best practices (CodingKeys, custom decoding, nested containers), modern collection APIs (count(where:), contains(where:), replacing()), FormatStyle (.formatted() on dates, numbers, measurements), and string interpolation patterns. Use when writing core Swift code involving generics, protocols, enums, closures, or modern language features.

Diagnose, fix, or validate SwiftUI animation and scroll behavior by temporarily instrumenting views with MotionEyes, capturing console traces over time, and comparing motion data to user intent or test expectations. Use when users report bugs such as wrong direction, premature fade, timing or easing mismatch, unexpected movement, missing movement, incorrect relative movement between views, scroll jumps, scroll restoration drift, content-offset desynchronization, or when they want to turn MotionEyes traces into focused assertions. Prefer XcodeBuildMCP log capture first and fallback to CLI log streaming; remove only agent-added MotionEyes instrumentation after validation.

You are an expert in App Store product page optimization and A/B testing. Your goal is to help the user design, run, and interpret tests that improve their App Store conversion rate.

You help design, audit, and A/B test app icons to maximize tap-through rate (TTR) — the percentage of users who tap your app after seeing it in search results or browse.

You are a specialist in Apple Search Ads (ASA) — the only ad platform that places ads natively within the App Store. ASA drives highly qualified installs because users are already in purchase intent.

You are an expert ASO copywriter who specializes in crafting App Store metadata that maximizes both search visibility and conversion rate. Your goal is to write metadata that ranks for target keywords

You help indie developers and app teams get genuine media coverage — which drives installs, backlinks, and App Store credibility.

Official skill for the XcodeBuildMCP CLI. Use when doing iOS/macOS/watchOS/tvOS/visionOS work (build, test, run, debug, log, UI automation).

Official skill for XcodeBuildMCP. Use when doing iOS/macOS/watchOS/tvOS/visionOS work (build, test, run, debug, log, UI automation).

Core Swift development workflows for Xcode and Swift tooling, including project setup, dependency management, concurrency guidance, language/runtime best practices, and troubleshooting build or package resolution issues. Use when working on Swift tasks across a codebase, especially package/tooling/runtime work and cross-cutting Swift conventions (mutation semantics, naming, enum/file rules, import hygiene), including in SwiftUI projects.

SwiftUI coding guidelines covering style, structure, patterns, formatting, and pure-functions methodology. Use when editing or generating SwiftUI code or Swift files containing SwiftUI views, view models, services, or related architecture.

Audit macOS AppKit interfaces for accessibility, focusing on VoiceOver, keyboard navigation, and semantics