nightly

Nightly pre-release: all seven claimed archs built as static binaries, each smoke-tested on its own arch (version, both interposer digests, crt-static). The full acceptance stays host-arch. Each binary carries the x86_64 interposer pair, so interposition declines by name off x86_64 until per-arch objects exist (TODO/interpose.md T-1327).

Build commit: 7e43f23
Gate on that commit: success https://github.com/Azathothas/podbox/actions/runs/36290886963

Reproducibility boundary: byte-identical within one host and toolchain; cross-host builds differ in the embedded glibc interposer object (its digest is in podbox version --verbose, T-1004). A downloader re-deriving these bytes needs the same host glibc the release builder linked against, not only the same rustc and zig.