I'm excited about https://sourcegraph.com/ as it lets you intelligently search a huge amount of open source code. Similar ideas to OpenGrok.
Related Posts
On the challenge of writing accurate source spans on Unicode source code: https://reedmullanix.com/posts/unicode-source-spans.html
Also (see footnotes) a fair number of LSP clients assume UTF-8 despite early versions of LSP mandating UTF-16!
I have a bunch of open tasks on my GH repos, so I tried asking ChatGPT and Claude to write a card-based web UI that showed some random open issues.
ChatGPT gave me something that worked, but the Claude mock-ups look better (and render inline!).
Over a sufficiently long time horizon, all code you write is legacy code.