Register and manage Foundry VTT hooks with Hooks.on, once, call, and callAll.
npx skills add https://github.com/ImproperSubset/hh-agentics --skill fvtt-hooks
Please help me install this Agent Skill. Skill: fvtt-hooks Source: https://github.com/ImproperSubset/hh-agentics/tree/main/fvtt-dev/skills/fvtt-hooks Command: npx skills add https://github.com/ImproperSubset/hh-agentics --skill fvtt-hooks
This skill helps Foundry VTT module developers implement and debug hooks safely, ensuring proper registration, lifecycle order, and cleanup.
Register a simple hook sequence to verify lifecycle:
High-intent search queries and answers about installing and using this skill.
To register Foundry VTT hooks safely, use Hooks.on for persistent events and Hooks.once for one-time lifecycle events. This ensures proper execution order and prevents memory leaks across client sessions.
The Foundry VTT hook lifecycle order follows init → i18nInit → setup → ready. Registering hooks in this sequence ensures modules initialize correctly and avoids common lifecycle event pitfalls.
Debug Foundry VTT hook execution by tracking hook call order, cancellation behavior, and memory management. Analyze Hooks.call and Hooks.callAll outputs to identify registered hooks failing to trigger properly.
Hooks.on registers persistent Foundry VTT hooks that trigger every time an event fires, while Hooks.once registers hooks that execute only a single time before automatic cleanup, ideal for initialization.
Foundry VTT hooks fail to trigger across client sessions due to improper registration, lifecycle order issues, or missing cleanup. Verify Hooks.on placement within the init → ready lifecycle phases.
Manual cleanup of Foundry VTT hooks prevents memory management issues across client sessions. Unregister persistent Hooks.on events when modules are disabled to ensure safe lifecycle execution.
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