Validate JSONL records against lightweight field contracts.
In the CLI tools & terminal space, jsonl-contract-check takes a focused approach. It automates validation of JSONL data files against defined field contracts for developers and data engineers. jsonl-contract-check is an open-source project aimed at developers and data engineers. The project is open source (MIT). It runs on the web and the command line, and it can be self-hosted.
It is developed by iwaheedsattar, and the product first shipped in 2026. Across PulseGate's embedding index, jsonl-contract-check has few near neighbours, marking it as relatively distinct. Among its 5 catalogued features are JSONL validation, schema enforcement, and command-line interface.
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