mage-go

Implement a Magic: The Gathering card (or batch of similar cards) from a genset stub. Writes failing tests first (TDD), then implements the card, then verifies all tests pass. Use when the user wants to implement a specific card or group of cards.

Implement a new engine feature in pkg/mage/ to support card implementations. Adds the feature, writes engine-level tests, updates doc.go, and verifies all existing tests still pass. Use when card agents identify an engine gap.

Implement an entire Magic: The Gathering set (or resume implementation of a partially-complete set). Fetches card data, generates stubs, analyzes cards, batches them by complexity and shared mechanics, then implements each batch using /implement-card. Use when the user wants to implement a full set or continue work on one.

Validate completeness and correctness of an implemented Magic: The Gathering card set. Checks for stubs, missing tests, Oracle text fidelity, and simplified implementations. Use when the user wants to audit a set's implementation quality.