- The crate ports Apache-2.0-only Hugging Face transformers code: it is
now `license = "Apache-2.0"`, and every ported file carries the
modification notice Apache-2.0 §4(b) asks for.
- Weights::open checks every tensor's byte range (and the header)
against the file's length: a truncated or damaged download is an
error at load, never a short read later; regression test with
hostile offsets.
- fetch/: the model download, only when asked for. An ordered mirror
list (env LIGHTCRAFT_SAM3_MIRRORS, a mirrors file, DEFAULT_MIRRORS —
empty until LightCraft's CDN exists, TODO for the maintainer),
fallback to the next mirror, resume via Range, redirects, connect and
stall timeouts, cancel, size caps, exact size + SHA-256 (pinned from
tools/install-sam3.sh) before an atomic rename; damaged files are
deleted, HTTP error bodies never written.
- HTTP/1.1 client over std sockets + rustls with the RustCrypto provider
(rustls-rustcrypto) and webpki-roots: no ring / aws-lc-rs, nothing
compiled from C (no new `cc` users in the app's build graph).
- Tests against a local TcpListener server (no internet): fallback,
redirects, chunked bodies, resume, 416, hash mismatch, too much data,
stalls, cancel.
- *.safetensors are gitignored.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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