e81d18dfb collapsed six per-surface copies of reasoning resolution onto
resolve_reasoning_config() and, in its own words, "fixes the gateway
resolving reasoning against config model.default instead of the session's
effective model". It did not touch gateway/platforms/api_server.py, which
kept that defect.
_create_agent() called GatewayRunner._load_reasoning_config() with no
model on its first line — before the model precedence chain (browser lock
-> session /model -> session row -> route -> per-request -> defaults) has
run. Per-model agent.reasoning_overrides therefore keyed off model.default
on the one surface where every request names its own model: a request for
a model with an override silently got the global effort instead.
Resolve after the chain settles, so the override follows the model the
request actually runs. An explicit per-request reasoning parameter still
takes precedence over config.
The existing test stub for _load_reasoning_config took no arguments (it
mirrored the old call); it now matches the real signature, as the sibling
stub in the same file already did.
93964fda3d