#Codemods

Articles about Codemods — exploring patterns, best practices, and real-world implementations in production systems.

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Pratik Dhanave · ·4 min read

Codemods at Scale — Changing Ten Thousand Call Sites Before Lunch

Every large codebase carries changes everyone wants and no one will do: the deprecated API with ten thousand call sites, the formatting standard half-adopted, the pattern that post-dates most of the code. By hand they're quarter-long projects that die in review; as codemods — programs that rewrite programs — they're an afternoon of transform engineering and an overnight run. The capability compounds: an organization that can safely change everything everywhere stops being afraid of its own codebase.

Codemods are programs that rewrite programs: AST-based (semantic targeting, idempotent, format-preserving), honest about their residue. Landing is logistics — ownership-sharded PR fleets, review the transform plus sampled output, lint rules closing the door. The product is reversibility at codebase scale.

#Developer Productivity#Codemods#Refactoring#Tooling#Platform Engineering

All posts on this site are written by Pratik Dhanave, an Agentic AI Architect with 7+ years building production distributed systems, multi-agent AI platforms, and cloud-native infrastructure. About the author → Each article includes working code, architecture diagrams, and references to the specific frameworks and standards discussed. Browse the blog or explore related topics using the tag cloud above.