Comprehensive guide for implementing Fullstory's Observer/Callback API (observe method) for web applications. Teaches proper event subscription, callback handling, observer cleanup, and reacting to Fullstory lifecycle events. Includes detailed good/bad examples for session URL capture, initialization handling, and integration with analytics platforms.

Comprehensive guide for implementing Fullstory's Page Properties API (setProperties with type 'page') for web applications. Teaches proper page naming, contextual data capture, SPA navigation handling, and session-scoped properties. Includes detailed good/bad examples for search results, checkout flows, dashboards, and content pages to help developers enrich page context for analytics and journey mapping.

Industry-specific guide for implementing Fullstory in B2B SaaS applications. Covers feature adoption tracking, onboarding optimization, churn prediction signals, multi-tenant privacy considerations, role-based experiences, and enterprise customer requirements. Includes detailed examples for dashboards, workflows, settings, and collaboration features.

Framework-agnostic guide for implementing stable, semantic selectors in any web application. Solves the dynamic class name problem caused by CSS-in-JS, CSS Modules, and build tools. Includes patterns for React, Angular, Vue, Svelte, Next.js, Astro, and more. Future-proofed for Computer User Agents (CUA) and AI-powered automation tools. Provides TypeScript patterns, naming taxonomies, and enterprise-scale conventions.

Industry-specific guide for implementing Fullstory in travel and hospitality applications including airlines, hotels, OTAs, car rentals, and vacation packages. Covers booking funnel optimization, search and filtering UX, payment handling (PCI), loyalty programs, and multi-traveler booking flows. Includes detailed examples for search, booking, check-in, and post-trip experiences.

Comprehensive guide for implementing Fullstory's User Properties API (setProperties with type 'user') for web applications. Teaches proper property naming, type handling, incremental updates, and special fields (displayName, email). Includes detailed good/bad examples for CRM integration, progressive profiling, and subscription tracking to help developers enrich user profiles for analytics and segmentation.

Create component documentation with installation, usage examples, and preview sections. Apply when documenting 8-bit components with proper structure and examples.

Python function design conventions for this codebase. Apply when writing or reviewing functions including signatures, parameters, return types, and async patterns.

Write concise docstrings for functions. Use when a junior developer needs help describing inputs, outputs, and errors.

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Designs functional architecture and detailed specifications for PHP/CakePHP applications based on analyzed requirements

Use when symfony functional tests

Functional programming patterns with immutable data. Use when writing logic or data transformations.

Validates that code actually works through sandbox testing, execution verification, and systematic debugging. Use this skill after code generation or modification to ensure functionality is genuine rather than assumed. The skill creates isolated test environments, executes code with realistic inputs, identifies bugs through systematic analysis, and applies best practices to fix issues without breaking existing functionality. This ensures code delivers its intended behavior reliably.

Reviews Go function signatures for parameter ordering, return value conventions, and receiver patterns. Use when reviewing function signatures, designing APIs, or seeing complex parameter lists.

Apply SOLID, DRY, KISS, YAGNI, and SSOT principles when writing, reviewing, or refactoring code to ensure maintainability and quality.

Plan and run an early-stage fundraising process and produce a Fundraising Pack (raise decision memo, round design brief, pitch narrative + deck outline, investor pipeline + tracker, outreach/follow-up scripts, diligence checklist). Use for fundraising, raising capital, venture capital, pitch deck, investor outreach, pre-seed, seed. Category: Career.

Training manager for local GPU training - validate CUDA, manage GPU selection, monitor progress, handle checkpoints

Generate comprehensive model cards and upload fine-tuned models to Hugging Face Hub with professional documentation

Use this skill when you need information about `@funstack/static` (the React framework your app is built with). What it is even about, API references, best practices, etc.

Compare data model designs and pick the best fit; use when modeling new data or refactoring schemas.

Generate malformed inputs and crash detection.

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Building effective fuzzing harnesses to maximize code coverage and vulnerability discovery through automated input generation

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Creating fuzz driver for Python libraries using LibFuzzer. This skill is useful when agent needs to work with creating fuzz drivers / fuzz targets for Python project and libraries.

Fuzzing strategist persona specializing in dynamic testing guidance, fuzzing strategy development, and crash analysis

This skill should be used when moving data between storage locations, changing data structures, renaming fields, or removing deprecated data. Covers schema versioning, safe migration methods, the Foundry unset operator, and idempotent migrations.

This skill should be used when choosing between flags, settings, or files for data storage, implementing document flags, registering module settings, handling file uploads, or migrating data between storage types. Covers namespacing, scope types, and performance optimization.

This skill should be used when registering hooks, creating custom hooks for module APIs, debugging hook execution, handling async in hooks, or preventing memory leaks from unclean hook removal. Covers Hooks.on/once/call/callAll, lifecycle order, and common pitfalls.

This skill should be used when adding features that update actors or items, implementing hook handlers, modifying update logic, or replacing embedded documents. Covers ownership guards, no-op checks, batched updates, queueUpdate wrapper, atomic document operations, and letting Foundry handle renders automatically for multi-client sync.

**Domain:** Foundry VTT Module/System Development

This skill should be used when importing Foundry classes, registering sheets, loading templates, enriching HTML, or using any Foundry API that has moved to namespaces. Covers compat wrappers, deferred sheet registration, and the modern-first fallback pattern.

how to approach tests, types and coverage

Maintain and upgrade the bgruening/docker-galaxy project: bump Galaxy/Ubuntu versions, update Ansible roles and scheduler support, adjust startup/CI/tests, and manage CVMFS.

Tracking player behavior and game performance through metrics, event tracking, funnel analysis, retention metrics, and integration with analytics platforms for data-driven game development.

Manage game assets with Kenney-ONLY approach. Search 36,000+ Kenney CC0 assets. If asset not found, ask user to find/generate manually. Ensure style consistency with flat/vector Kenney aesthetic. Auto-triggers on asset requests.

Find 10x product opportunities and high-leverage improvements. Use when user wants strategic product thinking, mentions '10x', wants to find high-impact features, or says 'what would make this 10x better', 'product strategy', or 'what should we build next'.

Game design principles. GDD structure, balancing, player psychology, progression.

游戏开发剧本处理技能 - 指导Claude Code使用游戏开发剧本处理器插件将剧本文件转换为游戏配置文件

Generate GameSpec JSON and Lua scripts for the AI Game Platform. Use when creating games, adding features like player movement, enemies, collectibles, or fixing Lua script issues. Supports FPS, 2D side-scrollers, and 3D platformers.

Guide for game hacking techniques and cheat development. Use this skill when researching memory manipulation, code injection, ESP/aimbot development, overlay rendering, or game exploitation methodologies.

Expert knowledge of Unity-based game skill configuration system. Use when working with skill JSON files, generating/modifying/analyzing game skills, debugging skill configs, or discussing skill mechanics like damage/healing/shields/buffs. Automatically activates for skill-related tasks in game development.

Game theory expert covering Nash equilibrium, strategic thinking, auction theory, and cooperative games

Use when planning GameDay exercises, designing failure scenarios, or conducting chaos drills. Covers GameDay preparation, execution, and follow-up.

Complete Game Designer workflow - skill invocation protocol, GDD creation, playtest flow with GDD review, design sessions. MUST load before starting assignments.

Core gameplay loop focusing on crime investigation, evidence photography, and time loop mechanics. Use when working on investigation features, photo system, or game progression.

Design gamified marketing campaigns using points, badges, leaderboards, streaks, challenges. Use for loyalty programs, referral campaigns, onboarding flows, engagement boosts, email gamification. Provides mechanics selection, psychology alignment, strategy docs, templates, KPIs.

Generate beautiful presentations, documents, and social posts with AI.