It's only a cli because they yanked out the opencode desktop code. (As well as the opencode go/zen model provider)

Edit: my theory is they wanted to mimic being the primary provider in a quick way with a lot of string replace. Though they could have added opencode back as a regular provider.

MiMo Code adds a lot of cool orchestration features to OpenCode! It definitely is NOT a quick find-replace job, it's genuinely someone's research project to create a better agent harness building on top of free software, and that's awesome. See https://mimo.xiaomi.com/blog/mimo-code-long-horizon