Your persona, read by your own agents. The drawing is the whole story; the rest is the manual.
Needs Claude Code, curl, node, unzip, and an account (the door; read what we can and cannot see first). Your line is on Connect:
curl -fsSL https://backself.com/skill/install.sh | sh -s -- bsb_<your code>
Cached for a day, one conditional request after that. The cached persona lives in ~/.backself (chmod 700). A token can read your persona and, with the runs scope, file run reports; no token can edit a persona file.
None of it blocks the run. No network, no Builder token: it still finishes and prints its report in the terminal.