Subscription: opencode go
I also use a claw agent[1] via Telegram, which uses pi.dev under the hood with my opencode go subscription.
[1] I forked one of those Claw projects (bareclaw) and made many changes to it.
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Funny you mention that, because I started noticing the word 'harness' being used everywhere about a month ago, even though I hadn’t seen it before (in this context). As I don’t trust my memory, I assumed I had just been overlooking it and added it to my vocabulary. However, a Google Trends search does show increased usage since the end of March: https://trends.google.com.br/trends/explore?date=today%203-m...
Highly recommend as a clean way to try out the upstart models.