Function adjustParamsForNonStreaming

src/services/api/claude.ts:3364–3392

(params: T, maxTokensCap: number)

 * @returns Adjusted parameters with thinking budget capped if needed
 */
export function adjustParamsForNonStreaming<
  T extends {
    max_tokens: number
    thinking?: BetaMessageStreamParams['thinking']
  },
>(params: T, maxTokensCap: number): T {
  const cappedMaxTokens = Math.min(params.max_tokens, maxTokensCap)

  // Adjust thinking budget if it would exceed capped max_tokens
  // to maintain the constraint: max_tokens > thinking.budget_tokens
  const adjustedParams = { ...params }
  if (
    adjustedParams.thinking?.type === 'enabled' &&
    adjustedParams.thinking.budget_tokens
  ) {
    adjustedParams.thinking = {
      ...adjustedParams.thinking,
      budget_tokens: Math.min(
        adjustedParams.thinking.budget_tokens,
        cappedMaxTokens - 1, // Must be at least 1 less than max_tokens
      ),
    }
  }

  return {
    ...adjustedParams,
    max_tokens: cappedMaxTokens,
  }
}

function isMaxTokensCapEnabled(): boolean {
  // 3P default: false (not validated on Bedrock/Vertex)