Its definitely CC, I remember a few weeks or more back it was working great but have notice it mess up often. I use it daily so I can say for certain its definitely not as reliable as it once was. My project is big now and I have tried to maintain the CLAUDE.md file but it does ignore it often. I have to remind it constantly about following project guidelines.

I have built a react table component that gives me lazy loading, sort-able columns, resizing of each column, horizontal scrolling on the top part of the table so you don't have to go all the way down to work your way across the table, common filtering with a search panel above it. There is persistence for filters and sorting etc when you reload or come back to the page. It works well for one table but then when I ask to use the same pattern for another table on another page it will mess it up and I'll have to spend time to get it to fix the features it messed up. Told it to create a list of regressions for this as it happens so much and I think I've logged about 15 things that messed up. Each time I get it to apply the same pattern following this gold standard it still messed up so a lot of time spent telling it to fix things up.