What’s the best way to pull (ie archive) and search these across a few harnesses? I remember seeing a project or two trying to standardize them, but can’t find anything that seems to be a good sensible solution

I've been using https://getmaestro.ai/ for 3 months now and I like it. Good founders.

I've used https://github.com/kenn-io/agentsview and found it to be quite sensible. Main friction point for me is I want it to be easier to extend.

Ask claude to do it end to end, then write a solution that fits your needs from it's experience with you driving it.

I did exactly this - probably the single most valuable piece of software I've "written". It's the backbone of every piece of code coming out of any agent under my control (via MCP toolset).

I think that T3 Code tries to do something like this, though I do not use it and have not used it, and I have heard good things about this.

Don't install a second harness. You only need one to begin with!