model_with_provider_context can emit @custom:<host>:<port>:<model> when
model_provider is derived from an OpenAI base_url authority (e.g.
custom:10.8.0.1:8080). The colon-count heuristic meant for @custom:slug:model:free
mistook those extra colons for an over-split model ID and prepended the port
segment onto the bare model (8080:Qwen3-235B), breaking WebUI while CLI/curl
stayed correct.
Detect endpoint-style slugs (IPv4/localhost/hostname + numeric port) and skip
the peel in that case. Add regression tests for IPv4, dotted hostname,
localhost, and model_with_provider_context round-trip.
liyang1116
7532482393