Tsinghua Team Open-Sources VeriLoop Coder-E1: Evidence-Governed Spiral Drives Verifiable Recursive Self-Improvement for Repository-Level Code Repair

VeriLoop Coder-E1 based on Qwen3.6-27B achieves SWE-bench Verified 85.20, SWE-bench Pro 62.38, Terminal-Bench 2.0 76.40, and DeepSWE 33.63 with narrow-domain PEFT and Self-Harness.