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Verified the parser captures a straddle from every non-blind seat (UTG..BTN, 7/7), so no behavior change — but the prompt only named UTG/button examples. Spell out that a straddle is legal from ANY non-blind seat (Mississippi/any-seat straddle, common at the Meadows) and state the open-action seat per straddle position, as insurance against model drift. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>