Data Consistency Checks

This post introduces Slack's 'consistency check framework' for verifying data integrity. It details the problem of data inconsistencies arising from outages, bugs, and scale. The framework is presented as a solution that codifies ad-hoc scripts into a reusable system. A simplified JavaScript example of a consistency check function (`team_consistency_domain_length`) is provided, along with command-line usage examples for running checks. The post also describes the evolution to a GUI-based tool for broader accessibility and the development of a 'fixer framework' to automatically resolve detected issues.