Model

Default model/effort/thinking for new turns that don't specify their own — the composer's own picker still overrides these per-message, same as it always has.

Currently: auto · model default

Fallback model

If the main model fails, retry once with this one before failing the turn.

Context window override

Force a specific context length instead of auto-detecting it from the model. Real model.context_length, not the fallback model above.

Fallback providers

Real fallback_providers config.yaml list — a different mechanism from the single retry-fallback model above (this list is consulted by the runtime provider resolver itself, not a per-turn retry).