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Developer builds open-source QA tool to independently verify AI-generated code

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A developer has released MaruCheck, an open-source quality assurance tool designed to independently verify software built by AI coding agents. The tool addresses a core flaw in AI-assisted development: when the same model writes both the code and its tests, a misunderstood requirement can pass undetected because the tests validate the wrong behavior. MaruCheck introduces a 'Quality Contract' — a persistent specification of intended feature behavior — against which any AI-generated changes are compared, rather than trusting the new implementation as the source of truth. The tool also performs risk-based analysis of code diffs, prioritizing verification for high-stakes files such as billing, authentication, and permissions logic. MaruCheck is not intended to replace existing testing frameworks like Jest or Playwright, but to act as a separate verification layer between the coding agent and production.

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