AIRA_2: Overcoming Bottlenecks in AI Research Agents. - Karen Hambardzumyan; Nicolas Mario Baldwin; Edan Toledo; Rishi Hazra; Michael Kuchnik; Bassel Al Omari; Thomas Foster; Anton Protopopov; Jean-Christophe Gagnon-Audet; Ishita Mediratta; Kelvin Niu; Michael Shvartsman; et al. (CoRR, 2026)