Answer three questions — scope of change , how type-heavy your codebase is , and who runs it — and the tool choice collapses to two. Solo TS-heavy repo: VS Code + ts-morph . Small team, one repo: WebStorm + jscodeshift . Multi-repo org: ast-grep + Sourcegraph Batch Changes . You can skip Babel, Comby, OpenRewrite/Moderne, and ReSharper unless you're in their specific ecosystem. Tool sprawl is a symptom: if you're debating 10 tools, the real gap is that nobody's defined what's ...