Add these to the list:

[3] https://orchestrator.inc/

[4] https://gitkraken.com/kepler

[5] https://emdash.com/

[6] https://superset.sh/

[7] https://www.conductor.build/

[8] https://nimbalyst.com/

[9] https://parallelcode.app/

[10] https://www.jetbrains.com/air/

There's also sometimes options that try to have a tighter integration with a single harness, which honestly seems to be better cause ACP is fairly bare:

[11] https://openchamber.dev/

Personally, I found Paseo to be very pleasant, except sometimes I had sub-agents kinda hang.

Kepler had a really nice issue tracking integration (GitLab/GitHub Issues, Trello, Linear, Jira) but their UI felt like vibe coded slop, like the core experience doesn't feel very good, but they keep adding shit that nobody needs like a graph visualization of what the agents are doing, instead of letting me drag the tasks around the Kanban board myself or tell the agents how to do that and how to transition the issue statuses. Hopefully it's gonna get better within a few years, still early on in development. Still, the idea of an issue tracker integration is brilliant and all harnesses should consider supporting that, e.g. pick which tickets you want to work on, they automatically create worktrees and agents do the planning/research step, presenting you with plans like /grill-me so you can decide what to work on, alongside having a step for merging all of those worktrees whenever you want when a wave of work is done.

I haven't tried most of them tbh cause my OS install doesn't need to be even more of a dumpster, but I'm surprised at how none of these really seem all that... rock solid?

Like if I open a JetBrains IDE like IntelliJ IDEA / Rider I know that despite the crappy resource usage and whatnot, they have the needs of writing, refactoring, debugging and building code covered. Most of the current harnesses seem to get some baseline of telling agents what to do, but still somehow end up being buggy (e.g. can't peek into OpenCode sub-agents and give THEM instructions last I checked, or pause or alter the prompt, despite Claude Code allowing message exchanges with sub-agents and such), and many others are just clones of what already exists.

At the same time the desktop / web apps shipped with harnesses like OpenCode (if there's one at all) are very clearly insufficient and a step below Claude Code Desktop and Codex (ChatGPT app) in usability (like that move to horizontal tabs like browsers have, come on how am I supposed to navigate when there's like 30 of those? or what about an auto mode switch within the UI), so obviously we do need something as an ADE.

Personally I wonder if half of these projects will die off in like 5 years, or whether they'll get more polish or differentiate themselves more, and which will try to push more for cloud-only stuff, like how RooCode essentially dumped their VSC plugins and went all in on the cloud.