> When I moved from crush to Zcode , the first thing I did was tell Zcode to migrate all of my crush customizations to Zcode and to set things up in a harness agnostic way going forward. It did.

This works for hosted mass-market solutions just as well! ChatGPT and Claude allow me to download all of my data, and these days data formats are less of a moat than ever given that you can just hand them to an LLM and have that worry about importing it into your new thing for you.

I've even seen explicit "offboarding prompts" to hand to your old agent, e.g. in Meta Muse.