TLDR Tech / DevOps
300 Days of RuboCop
A Ruby developer spent 300 days introducing RuboCop into a 1M+ line legacy Rails monolith, enabling cops incrementally and fixing offenses through hundreds of small, reviewable PRs instead of a big-bang migration. The effort reduced PR review noise, uncovered real bugs and risky patterns, led to upstream contributions to RuboCop, and concluded once the remaining cops offered diminishing returns relative to ROI.
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