Migrate to ESM #1647

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1. MikeMcC399

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   type: enhancementNew feature or requestNew feature or request

   on Jan 29, 2026
2. MikeMcC399

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   issue type on Jan 29, 2026
3. MikeMcC399 commented on Jan 29, 2026

   

   MikeMcC399

   on Jan 29, 2026

   Last edited by MikeMcC399

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   I don't expect to be doing this myself and it will probably fall to the Cypress.io team if it is to be done. In the long term, if it is not addressed then the action will tend to become unmaintainable. The got dependency version used is already unmaintained. Edit: resolved.
4. MikeMcC399 commented on Jan 31, 2026

   

   MikeMcC399

   on Jan 31, 2026

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   For example @actions/core@3.0.0 says:

   • Breaking change: Package is now ESM-only
   • CommonJS consumers must use dynamic import() instead of require()

   Attempting to update the action to this version fails at the build stage if no other changes are made:

   $ npm run build
   
   > @cypress/github-action@0.0.0-development build
   > ncc build -o dist index.js
   
   ncc: Version 0.38.4
   ncc: Compiling file index.js into CJS
   Error: Module not found: Error: Package path . is not exported from package <repo-root>/github-action/node_modules/@actions/core (see exports field in <repo-root>/github-action/node_modules/@actions/core/package.json)
   
5. MikeMcC399 commented on Mar 3, 2026

   

   MikeMcC399

   on Mar 3, 2026

   Last edited by MikeMcC399

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   • test: update examples to type: module (ESM) #1672 migrates the examples only
6. MikeMcC399 commented on Aug 31, 2026

   

   MikeMcC399

   on Aug 31, 2026

   Last edited by MikeMcC399

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   • PR fix: migrate from got@11 to got@16 #1874 fixes the got issue and migrates to the latest ESM version.