vaporcheck is an open-source CLI tool that verifies the existence of identifiers such as packages, paths, and symbols emitted by language models. It helps developers and agent frameworks prevent acting on hallucinated or non-existent resources, improving supply chain security and reliability in automated workflows.
vaporcheck sits in PulseGate's Security & compliance platforms category. It prevents agents from acting on hallucinated or non-existent packages, paths, and symbols generated by language models. vaporcheck is an open-source project aimed at developers using LLM agents. The project is open source (Apache-2.0). vaporcheck is available on the command line.
Behind vaporcheck is cdmx-in, and the product first shipped in 2026. The project is developed in the open on GitHub with 8 commits in the last 90 days. Among its 5 catalogued features are identifier verification, fail-closed checks, and hallucination detection.
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