Add Yare

[jaso0n0818]

Summary

Adds engine support for Yare.

Files changed

• crates/engine/src/parser/oracle_effect/subject.rs
• crates/engine/src/game/coverage.rs
• crates/engine/tests/integration/yare_extra_blockers.rs
• crates/engine/tests/integration/main.rs

CR references

• CR 509.1a + CR 509.1b — extra blocking permissions
• CR 608.2c — anaphoric "That creature" sub-ability chain

Track

Non-developer

LLM

Model: claude-4.6-sonnet-medium-thinking
Thinking: medium

Verification

• ./scripts/check-parser-combinators.sh — clean
• cargo test -p engine --lib yare_spell_extra_blockers_up_to_two_this_turn — pass
• cargo test -p engine --test integration yare_extra_blockers — pass

Gate A

$ ./scripts/check-parser-combinators.sh
(exit 0 — no violations)

Anchored on

• crates/engine/src/parser/oracle_effect/subject.rs:5187 — existing can block two additional creatures this combat handler
• crates/engine/src/game/combat.rs:5612 — extra_blockers_allows_blocking_two_attackers runtime validation pattern

Tier: Standard

Scope Expansion

None.

Validation Failures

None.

CI Failures

None.

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[matthewevans]

Approved after maintainer fmt-only fixup and re-check: the Yare extra-blockers parser/runtime regression is at the existing ExtraBlockers seam, the required enhancement label is present, and GitHub checks are green at 61daf32a9e9b9858d5cafe177041e3498f7ae309.

[matthewevans]

VERDICT: approve

Conflict resolution is limited to keeping both data-carrying coverage statics, CI is green, and the current head is labeled enhancement.