I regularly switch between codex and Claude in the same sessions. I’d throw in other models if I could.

Data governance and enterprise sales is a moat. The harnesses aren’t.

I thought so too.

But 1) people use other models with that same harness. 2) I moved on from Claude Code and all the features I cared for up and running in less than a couple days. Without even looking for available plugins or extensions.

> Harness engineering is a moat.

I mean, if that’s the case, then Anthropic themselves are currently actively filling in that moat with nice, solid, walkable dirt. Claude Code may have been a moat 6 months ago but these days you’ll want to replace the “m” with a “bl”.

The industry on tooling have been very much moving in direction of "plug the AI of your choosing" for a while now, and given how much Anthropic fights the 3rd party tools they are definitely afraid to be left in the dust.

> just like there’s more market share by MacOS+WindowsOS over Linux Open Source.

It's hard to change OS. It's not hard to jump from one AI tool to another