Cross-device continuity / treating multiple machines as one workspace

[Coriou]

One thing I still find surprisingly painful is working across multiple machines.

I have an always-on Mac mini and a couple of laptops. They mostly have the same repos and tooling, but from an agent perspective they’re still separate worlds: sessions and useful state tend to stay wherever they started.

I know #5363 / #5544 are tackling thread handoff, but I wonder if there’s a broader opportunity here: could T3 treat equivalent environments as execution targets for the same logical workspace?

Not by syncing credentials, binaries, MCPs, etc. blindly — machines will always differ. More at the T3 layer: repo/project identity, threads, relevant state/preferences, and generally making switching machines boring.

A lot of the pieces seem to already exist. T3 feels like a pretty natural place to solve this.