Add Doubles Battle Support to Engine#62

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sudo-owen wants to merge 11 commits intomainfrom

claude/merge-double-battle-main-EhNdh

Commits on Feb 16, 2026

docs: add implementation plan for doubles battle support
claude
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feat: add doubles battle data structures (GameMode, slot packing, expanded contexts)
claude
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chore: remove accidentally committed doubles-only files
claude
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feat: add doubles battle support to Engine, Validator, and CommitManager
claude
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feat: port doubles tests from double-battle branch and fix matchmaker bug
claude
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feat: add doubles slot 1 execution support to Engine
claude
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fix: enable all 12 remaining doubles tests with Validator, AttackCalculator, and StaminaRegen fixes
claude
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refactor: move doubles validation logic to ValidatorLogic library for inline gas savings
claude
committed

Commits on Feb 17, 2026