What problem does it solve? Adding a new spell or ability to the Helix game codebase touches content definitions, domain effects, registries, and tests across several directories, and missing a step breaks the fixed-step simulation. This Skill walks an automated worker through the runbook for adding a spell, enemy ability, or named effect with the correct standards applied. ## Core Features & Use Cases - Spell and ability scaffolding: Creates definitions under src/content/spells/ or src/content/abilities/ following the content authoring standard. - Named effect guidance: Adds tick-safe effects under src/domain/abilities/effects/ with no allocation, no clock, and numbers from the cast definition or tuning table. - Test coverage rules: Requires one simulation test per effect at orb levels 1 and 7 plus the refusal cases the runbook lists. - Use Case: You want to add a new enemy ability. The Skill directs you to mirror the shortest existing file in src/content/abilities/, list it in the enemy's abilities, and walk the definition of done before reporting. ## Quick Start Add a new hero spell called Ember Lance that deals fire damage and scales with orb level.
