Jumping in here... unfortunately, the hype around some of these all-in-one IDEs is kinda overblown. I was so hyped for Cursor but it really let me down on a big project last month because it just couldnt keep track of my nested Java classes. It kept trying to write Python code that referenced stuff that didnt exist anymore lol. It was super frustrating tbh. If youre doing heavy lifting, you gotta stop relying on just the basic UI features. Ive been learning that the context window is everything for legacy stuff. Here is what I found actually works when youre in the trenches:

• Use the Anthropic Claude 3.5 Sonnet API. The raw API feels way more stable and way less prone to weird glitches than the built-in editor chat windows.
• Look into Aider AI Coding Assistant v0.59.0. It creates a map of your whole project which is huge. It actually scans your file structure so it knows where the spaghetti code begins and ends before it starts typing.
• Maybe try OpenAI GPT-4o API if Claude hits a rate limit, though I find it gets a bit lazy with long files compared to Anthropic. The main issue is that most tools only look at small snippets but old Java code has dependencies hidden everywhere. You need that full repo map or youre gonna spend half your time fixing broken imports manually. Honestly its a bit of a learning curve for me but its way more reliable than just opening a file and praying it works.

In my experience, you really cant go wrong with Anthropic. Over the years, I found they handle code most reliably. Lmk if you need tips.

• Stick with Anthropic
• Focus on reliability