Are there any refactoring tools that handle large monorepos without slowing down the editor?

Yes, there are several refactoring approaches and tools specifically suited to large monorepos that avoid loading the entire codebase into the editor and therefore do not slow it down. The most effective ones run as offline scripts, build-plugin recipes, or batch systems rather than relying on the IDE’s live language service for the full refactor.

Here are the main options that work well at monorepo scale:

OpenRewrite (open-source) and its commercial platform Moderne. These provide recipe-based automated refactoring that operates on the whole codebase (or many repositories) outside the editor. They are especially strong for JVM languages and framework migrations, security fixes, and style consistency. You run them via Maven/Gradle plugins or a CLI/platform so the editor stays responsive.

jscodeshift (for JavaScript/TypeScript) and ts-morph (TypeScript-first). These are codemod libraries that let you write scripts to perform mechanical, AST-based transformations across thousands of files. Because they run as standalone Node processes (often in CI or a terminal), they never tax the editor’s language server. ts-morph is particularly useful when you need type-aware renames or cross-package symbol updates in a TypeScript monorepo.

Sourcegraph Batch Changes (and the newer Agentic Batch Changes). These apply a declared change across a large monorepo or many repositories, open the resulting pull requests, and track them. The heavy lifting happens on Sourcegraph’s side or in CI, keeping your local editor light.

AI-assisted orchestration tools (for example Claude Code with subagents or similar agent frameworks). These can plan and execute cross-package refactors by searching and editing selectively rather than loading everything at once. When combined with worktrees or package-scoped sessions they stay manageable even in very large repositories.

Supporting practices that keep the editor itself fast while you refactor:

Use monorepo build tools such as Nx, Turborepo, or Bazel so that only affected packages are considered during analysis and builds.

Prefer project references, isolated declarations, and incremental TypeScript settings so the language service does not re-analyze the entire monorepo on every change.

Apply “focus mode” or partial workspace loading in IDEs (available in some JetBrains and Android Studio setups) so the editor indexes only the packages you are actively working on.

Run large mechanical refactors as one-off scripts or CI jobs rather than interactive IDE rename/extract operations.

In short, for large monorepos the most reliable way to refactor without slowing the editor is to move the work out of the interactive IDE and into purpose-built codemod engines (jscodeshift/ts-morph), recipe systems (OpenRewrite), or batch platforms (Sourcegraph). Keep the editor focused on the packages you are currently editing and let the heavy, cross-cutting transformations run offline.