Function build

packages/ai-bedrock/src/index.ts:66–91

* Shared branching used by both public factories. Constructs the adapter * classes directly so their constructors run the full auth cascade lazily * (config.apiKey → BEDROCK_API_KEY → AWS_BEARER_TOKEN_BEDROCK → SigV4). No * eager env-key fetch here, so `auth: 'sigv4'` never throws for a missing k

(
  model: BedrockConverseModels,
  config?: BedrockClientConfig & { api?: 'converse' | 'chat' | 'responses' },
)

 * Default path → Converse adapter; opt-in via `api: 'chat'` or `api: 'responses'`.
 */
function build(
  model: BedrockConverseModels,
  config?: BedrockClientConfig & { api?: 'converse' | 'chat' | 'responses' },
): AnyBedrockAdapter {
  if (config?.api === 'responses') {
    const rest = stripApi(config)
    if (!isResponsesModel(model)) {
      throw new Error(
        `Model "${model}" is not available on the Bedrock Responses API. ` +
          `Responses-capable models: ${BEDROCK_RESPONSES_MODELS.join(', ')}.`,
      )
    }
    return new BedrockResponsesTextAdapter(rest, model)
  }
  if (config?.api === 'chat') {
    if (!isChatModel(model)) {
      throw new Error(
        `Model "${model}" is not available on the Bedrock Chat Completions API. ` +
          `Chat-capable models: ${BEDROCK_CHAT_MODELS.join(', ')}.`,
      )
    }
    return new BedrockTextAdapter(stripApi(config), model)
  }
  // Default + explicit 'converse'
  return new BedrockConverseTextAdapter(config ? stripApi(config) : {}, model)
}

// --- createBedrockText: explicit key, overloaded on `api` ---
export function createBedrockText<TModel extends BedrockConverseModels>(