Thanks for the PR,@higherorderfunctor!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

🙏Please, if you or your company is finding typescript-eslint valuable, help us sustain the project by sponsoring it transparently onhttps://opencollective.com/typescript-eslint.

✅ Deploy Preview fortypescript-eslint ready!

Name	Link
🔨 Latest commit	e081759
🔍 Latest deploy log	https://app.netlify.com/sites/typescript-eslint/deploys/6677155e685e6a0009479df1
😎 Deploy Preview	https://deploy-preview-9336--typescript-eslint.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 99 (🟢 up 1 from production) Accessibility: 100 (no change from production) Best Practices: 92 (no change from production) SEO: 90 (no change from production) PWA: 80 (no change from production) View the detailed breakdown and full score reports

To edit notification comments on pull requests, go to yourNetlify site configuration.

☁️ Nx Cloud Report

CI is running/has finished running commands for commite081759. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this CI Pipeline Execution

Sent with 💌 fromNxCloud.

Thanks for the initial review. I did discover one bug that is fixed in my branch with a collection of changes. If a user changes extensions from the initial ones, they do not get updated. I'll carry the fix in and add a test.

Taking out of draft. Notable updates:

• Discovered a bug when changingextraFileExtensions in the same linting session.
  • Added positive and negative test cases for this situation.
• Moved the logic back topackages/typescript-estree/src/useProgramFromProjectService.ts.
• The approach now caches the last setextraFileExtensions and only callssetHostConfiguration when there is a difference.
  • I'm caching directly on theProjectService with__extra_file_extensions so it gets garbage collected withclearTSServerProjectService. If you prefer a proper cleanup with it's own function, I can do so, but it may take a few days to find availability.
  • Using sets yielded the best performance when testing hence thesymmetricDifference logic. I did not exhaustively look at other options, just some tests iterating with for-loops. Let me know if you want a different approach.
• I've added documentation to the site explaining how to minimize project reloads by settingextraFileExtensions only once.

This is part of a larger set of changes discussed on#9312 (comment) and#8835 (comment).

• Fixesextends not getting processed by the default config used forprojectService inferred projects.fix(typescript-estree): adds support for project services using extended config files #9306
• Adds tsserver logging.feat(typescript-estree): exposes ProjectService logs through the plugin #9337
• Minimizes how many timessetHostConfiguration is called.fix(typescript-estree): only run projectService setHostConfiguration when needed #9336
• Adds support to use watches with a Trie lookup (without actual FS watching) to update tsserver with changes (e.g., file created).fix(typescript-estree): adds project service watch to add new files to project #9353
• Caches open files with tsserver and closes them using an LRU based on access order.
• Sends incremental diffs instead of re-opening files if already open.

Made the reordering and trimming changes requested. I also updated the links with the title change in the performance section.

Let me know if any further edits are needed!

All review suggestions have been committed. Thanks again!

Inspecting pipeline errors and some of the links aren't rendering locally. Inspecting now.

Fixes made. So long as the pipeline succeeds, we should be good to merge!