try using copilot on any substantial back-end codebase and watch it eat 90+% just building a plan/checklist

twodave on Hacker News

90+%

In the thread “1M context is now generally available for Opus 4.6 and Sonnet 4.6”, replying to this comment

Helped: Building front-end components with API spec on hand.

Got in the way: Building plans or checklists on substantial back-end codebases.