KAT-Coder-V2.5 Ships with AutoBuilder — 100,000+ Verifiable Repo Environments Across 12 Languages
MarkTechPost·high signal
Kuaishou's KwaiKAT team released KAT-Coder-V2.5 on July 26 along with AutoBuilder, a pipeline that constructs executable training environments from real PRs and commits, each with a task description, a runnable repo, and validation tests. AutoBuilder lifted environment construction success from 16.5% to 57.2%, yielding 100,000+ verified environments (accepted only when >90% of expected tests pass consistently across runs). The thesis is explicit and worth internalizing: agentic coding capability is bottlenecked by the scarcity of reproducible environments and verifiable rewards, not by model scale.