Harness engineering is a moat. There’s user loyalty and reliance on the chassis that Claude is on, for example, just like there’s more market share by MacOS+WindowsOS over Linux Open Source.
Data governance and enterprise sales is a moat. The harnesses aren’t.
> 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
If you had said "marketing is a moat" then yes, I would say you were right. But creating a harness equal to or better than Claude Code is trivial. The CC harness is actually shit. There are tons of open-source harnesses than work better than CC while using Opus via OpenRouter.
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.
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”.