Can't get useful result after indexing a github repo

[femto]

🐛 Describe the bug

I can't get useful result after indexing a github repo

app.add("repo:geekan/MetaGPT type:repo", data_type="github", loader=loader)

result, citations = app.query("Could you give me quickstart example for using metagpt", citations=True)
#or try this one
#result, citations = app.query("how to write a new agent? Could you give me sample code?", citations=True)


result

result is bad. In contrast,search in https://docs.mem0.ai/ and https://docs.embedchain.ai/ yields very good no-hallucination result, how do I achieve that?