Automate MTG triggered ability definition and wiring in the engine.
npx skills add https://github.com/phase-rs/phase --skill add-trigger
Please help me install this Agent Skill. Skill: add-trigger Source: https://github.com/phase-rs/phase/tree/main/.claude/skills/add-trigger Command: npx skills add https://github.com/phase-rs/phase --skill add-trigger
Enables consistent modeling and wiring of MTG triggered abilities within the engine, covering the full trigger lifecycle from event detection to resolution, including TriggerDefinition, TriggerMode, the matcher registry, APNAP ordering, targeting, intervening-if, constraints, and parser wiring.
Define a TriggerDefinition, register a matcher, and parse an oracle trigger line to verify correct frontmatter and activation.
High-intent search queries and answers about installing and using this skill.
To define MTG triggered abilities, you create a TriggerDefinition with fields like mode, execute, and condition, then validate it against intervening-if clauses, APNAP ordering, and constraint checks such as OncePerTurn to ensure correct event resolution.
An oracle trigger parser parses When/Whenever/At style MTG trigger lines and converts them into executable TriggerDefinitions by integrating with the TriggerMode registry and matcher system to wire event detection automatically.
Yes, you can use matchers to detect specific MTG events like ChangesZone, SpellCast, and DamageDone. A central matcher registry dispatches these events to the corresponding TriggerDefinition for resolution.
Handling APNAP ordering and targeting for triggered abilities requires the engine to process trigger resolution through the central registry, applying constraint checks and extracting targets during both fire and resolution phases.
You can apply constraints like OncePerTurn, OncePerGame, and OnlyDuringYourTurn to MTG triggered abilities. These constraint checks are evaluated during the fire and resolution phases to limit ability activation.
MTG triggered ability validation fails against intervening-if clauses when the TriggerDefinition condition field does not correctly map to the event matching logic, preventing the parser from wiring proper event detection.
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