Decision-Shapley v1.0.0

First public research-artifact release accompanying the ICTAI 2026 paper "Won by a Single Question: Item-Level Attribution and the Robustness of LLM Leaderboard Decisions."

Includes the command-line report-card tool, reproducibility scripts, experiment outputs, tests, camera-ready paper source, and compiled PDF. The software is released under the MIT License; third-party benchmark data remains subject to its original terms.