[DevTools] Configure Jest for ESM dependency compatibility #421
Description
Background
PR #289 proposed adding ESM support to the Jest configuration to fix CI failures when updating ESM-only dependencies.
Problem
Dependency PRs (chalk 5.x, execa 9.x, commander 14.x, etc.) fail CI because Jest cannot parse ESM-only packages.
Proposed Changes
- jest.config.js: Add
transformIgnorePatternsto transform chalk and babel-jest for JS files - babel.config.js: New Babel config targeting current Node.js for ESM→CJS transformation
- package.json: Add
@babel/core,@babel/preset-env,babel-jestas dev dependencies
Expected Results
| Dependency | Before | After |
|---|---|---|
| chalk 4→5 | ❌ Jest ESM error | ✅ Fixed |
| execa 5→9 | ❌ API changes | ❌ Needs code updates |
| commander 12→14 | ❌ Stricter args | ❌ Needs code updates |
Notes
PRs for execa and commander have breaking API changes requiring source modifications—those cannot be fixed through configuration alone.
Issue created from PR #289 during backlog cleanup