AgentCollabBench: Diagnosing When Good Agents Make Bad Collaborators. - Aritra Mazumder; Shubhashis Roy Dipta; Nusrat Jahan Lia; Tanzila Khan; Kainat Raisa Hossain; Nehaa Shri; Shubhrangshu Debsarkar; Humayra Tasnim; Gour Gupal Talukder Shawon; Debjoty Mitra; Sumaiya Ahmed Rani; Al Jami Islam Anik; et al. (CoRR, 2026)