Full-stack development fundamentals - architecture, patterns, integration

Use when implementing features across frontend and backend, building APIs with UI, or creating end-to-end data flows. Invoke for feature implementation, API development, UI building, cross-stack work.

Comprehensive validation methodology for multi-component applications including backend, frontend, database, and infrastructure

Comprehensive guide for implementing Fullstory's Analytics Events API (trackEvent) for web applications. Teaches proper event naming, property structuring, type handling, and e-commerce event patterns. Includes detailed good/bad examples for funnel tracking, feature usage, conversion events, and SaaS subscription flows to help developers capture meaningful business events for analytics and segmentation.

Comprehensive guide for implementing Fullstory's User Anonymization API (setIdentity with anonymous:true) for web applications. Teaches proper logout handling, session management, privacy compliance, and user switching scenarios. Includes detailed good/bad examples for logout flows, multi-user applications, and privacy-conscious implementations.

Comprehensive guide for implementing Fullstory's Asynchronous API methods (Async suffix variants) for web applications. Teaches proper Promise handling, await patterns, error handling, and when to use async vs fire-and-forget methods. Includes detailed good/bad examples for initialization waiting, session URL retrieval, and conditional flows to help developers handle Fullstory's asynchronous nature correctly.

Strategic meta-skill for Fullstory data semantic decoration. Teaches when to use page properties vs element properties vs user properties vs events. Provides a deterministic framework for scoping data at the right level to maximize searchability, avoid duplication, and maintain consistency. Essential foundation for proper Fullstory implementation across all API types.

Comprehensive guide for implementing Fullstory's User Identification API (setIdentity) across web applications. Teaches proper uid handling, property passing, re-identification behavior, and session management. Includes detailed good/bad examples for login flows, multi-account scenarios, and SPA applications to help developers correctly identify users for analytics and session replay.

Comprehensive guide for implementing Fullstory's Element Privacy Controls (fs-exclude, fs-mask, fs-unmask) for web applications. Teaches proper privacy class usage, understanding what data leaves the device, CSS selector rules, and Form Privacy features. Includes detailed good/bad examples for protecting sensitive elements while maintaining session replay utility.

Strategic guide for data privacy in Fullstory implementations. Teaches developers how to decide what data to send, mask, exclude, hash, or replace with joinable keys. Covers regulatory compliance (GDPR, HIPAA, PCI, CCPA), privacy-by-design principles, and balancing analytics value with privacy protection. Acts as a decision framework that references core privacy skills.

Comprehensive guide for implementing Fullstory's User Consent API for web applications. Teaches proper consent flow implementation, selective capture modes, GDPR/CCPA compliance patterns, and cookie consent integration. Includes detailed good/bad examples for consent banners, preference centers, and privacy-conscious recording to help developers implement privacy-compliant session recording.

Create MDX documentation files with proper frontmatter, imports, and component integration. Apply when creating or updating Fumadocs documentation pages in content/docs/.

Register 8-bit components in registry.json for shadcn/ui add command. Apply when adding new components to the component library distribution.

Use when writing functional code - covers FP best practices (Lea differs from traditional FP languages)

Advanced function patterns including declaration styles, closures, scope chains, hoisting, and this binding. Master function composition and advanced techniques.

Core JavaScript fundamentals including variables, data types, operators, control flow, and basic syntax. Essential foundation for all JavaScript development.

Help founders raise capital and build investor relationships. Use when someone is preparing a pitch deck, deciding whether to raise venture capital, meeting with investors, or asking about fundraising strategy.

Map complete funnel from ad to conversion, documenting each step, identifying metrics at each stage, calculating stage-to-stage conversion rates, and highlighting biggest drop-off points. Use for funnel optimization, diagnosing conversion issues, or documenting funnel architecture.

Validate datasets for Unsloth fine-tuning. Use when the user wants to check a dataset, analyze tokens, calculate Chinchilla optimality, or prepare data for training.

Training manager for Hugging Face Jobs - launch fine-tuning on HF cloud GPUs with optional WandB monitoring

Training manager for RunPod GPU instances - configure pods, launch training, monitor progress, retrieve checkpoints

FuseCore Modular Architecture - Laravel 12 modular monolith with auto-discovery, React integration, and SOLID principles. Use when creating modules, understanding FuseCore structure, or implementing features in FuseCore projects.

Compare architecture patterns and select the most suitable; use for system design decisions.

Propose multiple UI component designs and select the best; use when exploring UI variants or visual direction.

Control Autodesk Fusion 360 CAD software via the Claude Bridge add-in. Create sketches, draw shapes, extrude 3D objects, and build complex models interactively.

This skill should be used when implementing dice rolling, creating Roll formulas, sending rolls to chat with toMessage, preparing getRollData, creating custom dice types, or handling roll modifiers like advantage/disadvantage. Covers Roll class, evaluation, and common patterns.

This skill should be used when adding error handling to catch blocks, standardizing error handling across a codebase, or ensuring proper UX with user messages vs technical logs. Covers NotificationOptions, Hooks.onError, and preventing console noise.

This skill should be used when creating or extending ActorSheet/ItemSheet classes, implementing getData or _prepareContext, binding events with activateListeners, handling drag/drop, or migrating from ApplicationV1 to ApplicationV2. Covers both legacy V1 and modern V2 patterns.

This skill should be used when implementing multiplayer synchronization, using game.socket.emit/on, creating executeAsGM patterns for privileged operations, broadcasting events between clients, or avoiding common pitfalls like race conditions and duplicate execution.

Set up Sandestin in a new project. Use when integrating sandestin into an application or library, creating dispatch namespaces, or wiring registries together. Keywords: setup, bootstrap, create-dispatch, wire, integrate, project.

Create new Sandestin effect registries following project conventions. Use when adding effects, actions, or placeholders. Keywords: registry, effect, action, placeholder, handler, create, new.

Command-line fuzzy finder for interactive filtering of any list. Use when interactively selecting files, searching command history (CTRL-R), creating selection interfaces in scripts, building interactive menus, or integrating fuzzy search with tools like ripgrep, fd, and git. Triggers on mentions of fzf, fuzzy finder, ** completion, interactive filtering, or shell keybindings CTRL-T/CTRL-R/ALT-C.

Server-rendered UI framework for Go. All HTML generation, business logic, and state management occur on the server. Interactivity achieved through server actions and WebSocket patches.

Query Google Analytics 4 (GA4) data via the Analytics Data API. Use when you need to pull website analytics like top pages, traffic sources, user counts, sessions, conversions, or any GA4 metrics/dimensions. Supports custom date ranges and filtering.

Expert guidance for GA4 privacy and compliance including GDPR, CCPA, Consent Mode v2, data deletion, and privacy settings. Use when implementing Consent Mode, ensuring GDPR compliance, handling data deletion requests, configuring consent banners, or implementing privacy-first tracking. Covers consent parameters (ad_user_data, ad_personalization), data retention, IP anonymization, and compliance workflows.

Gainsight customer success platform for health monitoring

Validate codebase architecture and organization before releases. Use when user asks to 'check architecture', 'validate structure', 'pre-release check', or before versioning.

1. Read the current GAME_REQUIREMENTS.md for authoritative values

This skill provides guidance for implementing multi-agent game coordination systems where a central gamemaster agent orchestrates multiple player agents running in parallel. The gamemaster acts as an

Database design for multiplayer games with PostgreSQL. Use when designing schemas, handling game persistence, managing user accounts, implementing lobbies, or optimizing queries. Covers JSONB for game state and relational patterns.

Use when designing game feel, player feedback systems, or when creating animations that enhance gameplay and player satisfaction.

Guide for game engine development resources including engine source code, plugins, and development guides. Use this skill when researching game engines (Unreal, Unity, Godot, custom engines), engine architecture, or game development frameworks.

Fixed timestep game loop with interpolation for frame-rate independent physics. Separates physics updates from rendering, prevents spiral of death, and supports hitstop/slow-mo effects.

game-requirements

game-servers

Implements common game systems including inventory, shops, trading, quests, achievements, pets, crafting, and leveling. Use when building RPG mechanics, progression systems, or monetization features.

Evolve and maintain game vision through Q&A interviews and decision tracking. Use when exploring game concepts, validating feature alignment, or making design decisions.

Manage Xbox Game Pass subscription, browse catalog, and track perks

Use when designing animations for gaming apps, streaming platforms, entertainment portals, or interactive media

gaming