exact_moa_preset_name matched any bare model name equal to a preset key,
regardless of the preset's enabled flag. On the no-explicit-provider switch
path (PATH B in model_switch.py), a plain /model switch whose name collided
with a preset key (e.g. "default") silently pivoted the session onto the MoA
virtual provider — even when the user had set enabled: false to opt out
(issue #55187). The LLM driving a routine model switch could land on a broken
moa provider with empty default_preset / unconfigured aggregator credentials.
Gate the implicit bare-name match on the per-preset enabled flag. Explicit
selection via --provider moa / the model picker uses PATH A and does not go
through exact_moa_preset_name, so a disabled preset stays reachable when the
user explicitly asks for it.
Teknium
e7ca53e6b8