ResearchResearch paperSafety & Alignment · Reasoning & Planning · Efficiency & Inference1 source · Oct 12, 2026

SpecGuardBench: Can Coding Agents Construct Reliable Validation Harnesses from Natural Language Specifications?

We introduce SpecGuardBench, a benchmark of 291 tasks from 13 real-world repositories, covering 8 types of verification logic such as functional postconditions and interaction protocols.

Key points

  • As coding agents become more capable, tests remain the primary evidence for judging whether their code is correct.
  • Yet passing available tests does not establish that an implementation satisfies its natural language specification.
  • Reliable validation requires checks that faithfully capture the specification and scenarios that thoroughly exercise the code, but current benchmarks provide limited insight into whether agents can construct such evidence themselves.
  • Given a natural language specification, repository context, and a reference implementation, an agent constructs a validation harness comprising executable checks and test scenarios.

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