Pi can do all the same that CC can. OSS is nice but the reason to use it is to control what is happening between me and the LLM. See: OP and many others for many reasons, bloated system prompts, the harness changing day to day, Anthropic shipping terrible and untested [features](https://news.ycombinator.com/item?id=48947776) that don't appear in the changelog, Codex ultra subagents nuking usage, etc. You can tell which harnesses are vibe coded.