Function applyBedrockRegionPrefix

src/utils/model/bedrock.ts:248–265

(
  modelId: string,
  prefix: BedrockRegionPrefix,
)

 * - applyBedrockRegionPrefix("claude-sonnet-4-5-20250929", "eu") → "claude-sonnet-4-5-20250929" (not a Bedrock model)
 */
export function applyBedrockRegionPrefix(
  modelId: string,
  prefix: BedrockRegionPrefix,
): string {
  // Check if it already has a region prefix and replace it
  const existingPrefix = getBedrockRegionPrefix(modelId)
  if (existingPrefix) {
    return modelId.replace(`${existingPrefix}.`, `${prefix}.`)
  }

  // Check if it's a foundation model (anthropic.*) and add the prefix
  if (isFoundationModel(modelId)) {
    return `${prefix}.${modelId}`
  }

  // Not a Bedrock model format, return as-is
  return modelId
}