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Someone already made a clone with 15K stars: https://github.com/mannaandpoem/OpenManus

I've been building something very similar, but OSS and running in the terminal, since 2023 (3.5k stars): https://github.com/ErikBjare/gptme

Currently working on building out a web UI (https://chat.gptme.org) and managed service for it.

Manus also seems very similar to Claude Code (but not open source either).

How does a repo get 15k stars in just 2 days?

China has a lot of users.

Bots and payola