Function resolveConnectionTestModel

packages/runtime/src/test-connection.ts:41–66

* Prefer an explicit model, then a still-live configured model. Legacy * connections without a discovered inventory keep the historical * default/fallback order.

(
  connection: ConnectionEffectConnection,
  model: string | undefined,
  fallbackModels: readonly string[],
)

 * default/fallback order.
 */
function resolveConnectionTestModel(
  connection: ConnectionEffectConnection,
  model: string | undefined,
  fallbackModels: readonly string[],
): string | undefined {
  const explicitModel = model?.trim();
  if (explicitModel) return explicitModel;

  const hasAuthoritativeInventory =
    connection.modelSource === 'fetched' && Array.isArray(connection.models);
  const discoveredIds =
    connection.models?.map(({ id }) => id.trim()).filter((id) => id.length > 0) ?? [];
  const discovered =
    hasAuthoritativeInventory || discoveredIds.length > 0 ? new Set(discoveredIds) : undefined;
  const candidates = [
    ...connectionEnabledModelIds(connection),
    ...fallbackModels,
    ...discoveredIds,
  ];
  for (const candidate of candidates) {
    const id = candidate.trim();
    if (!id || (discovered && !discovered.has(id))) continue;
    return id;
  }
  return undefined;
}

export async function testConnection(
  connection: LlmConnection,