nixpkgs points its macOS bun at an ICU in the nix store, and bun build
--compile copied that reference into bin/quak, so nix-collect-garbage could
break the cron backup. script/build-bin now downloads bun 1.3.13's release
archive on macOS too, Intel (baseline) or Apple silicon, checks its SHA-256,
and compiles with it. Those builds load only /usr/lib libraries. nix-shell is
no longer used; any system without a bun release build stops with an error.
The hash check falls back to shasum where sha256sum is missing.
Model: opus-5-5
clawbot