The request asks for a data-quality checker. The most direct match is Great Expectations, whose GX Core is an open source framework for testing, validating and documenting data quality across pipelines 5. Python-cerberus provides lightweight schema-based data validation for Python 9, and SQLFluff is a SQL linter that flags style and syntax issues in SQL code, which covers quality of SQL rather than data itself 6.

1. 1

   GX Core (Great Expectations)greatexpectations.ioverified and signed

   Open source framework for testing, validating and documenting data quality across modern data pipelines and workflows 5.

   WebsiteDocs

   for agents: dataquality · datavalidation · data

2. 2

   Cerberuspython-cerberus.orgverified and signed

   Lightweight Python library that validates data against a defined schema, with validation and normalization functions 9.

   WebsiteDocs

   for agents: validation · normalization · schema

3. 3

   SQLFluffsqlfluff.comverified and signed

   SQL linter that finds style and syntax issues in SQL code and can auto-fix most of them, with Jinja and dbt support 6.

   WebsiteDocs

   +4 community tools built for it

   for agents: linter · bigquery · databricks