Function paramsFromContext

src/services/api/claude.ts:1538–1729

(retryContext: RetryContext)

  let lastRequestBetas: string[] | undefined

  const paramsFromContext = (retryContext: RetryContext) => {
    const betasParams = [...betas]

    // Append 1M beta dynamically for the Sonnet 1M experiment.
    if (
      !betasParams.includes(CONTEXT_1M_BETA_HEADER) &&
      getSonnet1mExpTreatmentEnabled(retryContext.model)
    ) {
      betasParams.push(CONTEXT_1M_BETA_HEADER)
    }

    // For Bedrock, include both model-based betas and dynamically-added tool search header
    const bedrockBetas =
      getAPIProvider() === 'bedrock'
        ? [
            ...getBedrockExtraBodyParamsBetas(retryContext.model),
            ...(toolSearchHeader ? [toolSearchHeader] : []),
          ]
        : []
    const extraBodyParams = getExtraBodyParams(bedrockBetas)

    const outputConfig: BetaOutputConfig = {
      ...((extraBodyParams.output_config as BetaOutputConfig) ?? {}),
    }

    configureEffortParams(
      effort,
      outputConfig,
      extraBodyParams,
      betasParams,
      options.model,
    )

    configureTaskBudgetParams(
      options.taskBudget,
      outputConfig as BetaOutputConfig & { task_budget?: TaskBudgetParam },
      betasParams,
    )

    // Merge outputFormat into extraBodyParams.output_config alongside effort
    // Requires structured-outputs beta header per SDK (see parse() in messages.mjs)
    if (options.outputFormat && !('format' in outputConfig)) {
      outputConfig.format = options.outputFormat as BetaJSONOutputFormat
      // Add beta header if not already present and provider supports it
      if (
        modelSupportsStructuredOutputs(options.model) &&
        !betasParams.includes(STRUCTURED_OUTPUTS_BETA_HEADER)
      ) {
        betasParams.push(STRUCTURED_OUTPUTS_BETA_HEADER)
      }
    }

    // Retry context gets preference because it tries to course correct if we exceed the context window limit
    const maxOutputTokens =
      retryContext?.maxTokensOverride ||
      options.maxOutputTokensOverride ||
      getMaxOutputTokensForModel(options.model)