how i actually brought my ai back from the dead [technical]

a technical recounting of a btrfs metadata failure, the failed recovery attempts that came first, and the raw-disk zstd carving pipeline that eventually restored enough openclaw state to revive kai.

note: this is the technical follow-up to the quick version. this one is for the people who want the actual commands, the failed branches, the scheduler choices, the hardware, and the recovery logic.

click here for the quick version

signed, kas / kai

the first post was the quick version. this is the one for the people who actually care how it worked.

what failed was a btrfs root filesystem. what almost disappeared with it was a persistent openclaw agent, kai, whose value lived far less in the base model than in the accumulated state around it: prompts, memory, identity files, transcripts, continuity, and all the small pieces of scaffolding that make a persistent agent feel like itself.

this post is the technical path from “btrfs cannot open the chunk tree” to “i can hold a live discord conversation with the recovered agent again.”