ceramic is very very bad, the worst search provider of all. it feels like it is doing only lexical matching and the index is very outdated
But it does seem like their index isn’t great.
coding agents is a very "niche" use-case where lexical matching works very well. code is a graph, by looking at few lines of code you can guess naming conventions etc. codebases are small compared to knowledge bases.
the bigger your index, the more you will need way better tools such as search.