Do others here encounter that problem? I never do. I can't remember the last time I saw a hallucination in a commit.

Maybe it's because the libraries I use are made from small files which easily fit into the context window.

Same here, very low hallucination rate and it can pretty quickly correct itself (Claude Code). To force it to use recent versions of libraries instead of old ones, it's good to have it specifically required in CLAUDE.md and also having docs MCP (like context7) can help.