It's for lock-in - same reason why it took them so long to finally support AGENTS.md.

But to be fair, they don't really enforce the harness rule that much anymore. I guess if your harness doesn't do a lot of weird things like a lot of cache misses, or triggers some distillation attacks, or some broader Chinese fingerprints, they're tongue-in-cheek okay with you using a third party harness.

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codybontecou a day ago | parent [-]

You can use Claude’s subscription in Pi now? Last I tried it opted for extra usage.

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glub a day ago | parent | next [-]

Not natively, as it's still a ToS violation and adding that in pi would go against pi principles, but there are many plugins/proxies that make it work.

oh-my-pi supports it natively (again, still a ToS violation), by impersonating claude code's fingerprints.

I have been using oh-my-pi with 3 claude subs for the past few months without any issues. Even native server-side OAI/ANT compaction works out of the box.

	▲	goosejuice 21 hours ago \| parent [-]
		It's pretty unclear because they have two somewhat competing sets of documentation but I believe using the agent sdk with a harness like pi is not against the ToS if it's for yourself. omp is definitely against ToS though https://support.claude.com/en/articles/15036540-use-the-clau... > Unless previously approved, Anthropic does not allow third party developers to offer claude.ai login or rate limits for their products, including agents built on the Claude Agent SDK.

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manx 14 hours ago | parent | prev [-]

Yes, you need an extension that uses the claude code credentials from the file system, like this: https://github.com/fdietze/pi-claude-auth

Works pretty well for me, even with latest opus-5-5