All four reproduced before fixing, and re-measured after.
- Proxy-only egress was declared offline. With HTTP(S)_PROXY set, the proxy
resolves the hub host, so a failing local lookup says nothing. The DNS
shortcut now stands down whenever a proxy applies (and honours NO_PROXY),
letting the proxy-aware probe decide. Measured: endpoint probe reachable
through the proxy while the guard still forced offline.
- The training worker kept its own inline probe hardcoded to huggingface.co,
so a reachable HF_ENDPOINT mirror set lifetime offline flags. It now uses
the shared endpoint- and proxy-aware helper.
- /models/check-vision, /models/config and /picker/chat-template ran the
probe even for local paths, which never reach the hub. Measured 0.9s of
pure latency per request; now skipped via _hf_offline_if_unreachable_for.
DNS/endpoint/proxy helpers now live in utils.utils so llama_cpp and the
training worker share one implementation instead of three copies.
The static pin in test_offline_inference_parent moved with the probe: the
worker block must delegate to the shared helper and must not hardcode a
host, and the daemon-thread/no-setdefaulttimeout property is pinned on
dns_host_dead where it now lives.
Offline path unchanged: load 686s -> 6s, /models/config 378s -> 0s, and a
local-path vision check is back to 0s.
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