This could fill a useful niche. However I would assume Anthropic and OpenAI are going to build their own and steamroll in 6-12 months.
I did a dive recently on git forges for agent swarms. Radicle lacks an identity layer, the federated/COB model seems good. Tangled has no private repo story, though the social layer is solid; they also have an (IMO) awkward modeling of Issues as tweets at her than being owned by the repo.
So I think there is an opening for a private agent-first forge. (Before the HN dogpile, assume that if you don’t buy the value of agent swarms, you can ignore this whole thread.)
My concern for this project - Anthropic is explicitly building in this direction. Their latest product is Tag which is an auth model for running agents async within Slack. The obvious next feature to build from there is the forge; if GitHub gets disintermediated by the Agent UI, then Anthropic are free to swap out their own implementations behind the scenes. Multiplayer chat and repo/project management seem like the obvious next platform pieces to me. (This goes for any SaaS subscription of course, follow it to the N-hop logical conclusion.)