Explore AI Agent Skills & Claude Prompts

This skill should be used when creating chat messages, sending roll results to chat, configuring speakers, implementing whispers and roll modes, or hooking into chat message rendering.

fvtt-combat

This skill should be used when working with the Combat tracker, Combatant documents, initiative rolling and sorting, turn/round management, or implementing combat hooks like combatStart, combatTurn, and combatRound.

fvtt-compendiums

This skill should be used when creating compendium packs, registering packs in manifests, importing/exporting documents, querying pack contents, or using the CLI for pack management and version control workflows.

fvtt-data-migrations

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.

fvtt-data-storage

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.

fvtt-dice-rolls

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.

fvtt-error-handling

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.

fvtt-hooks

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.

fvtt-localization

This skill should be used when implementing internationalization (i18n), creating language files, using game.i18n.localize/format, adding template localization helpers, or following best practices for translatable strings.

fvtt-performance-safe-updates

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.

fvtt-sheets

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.

fvtt-sockets

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.