Raw API client

When you need full access to the Vertex AI REST API beyond what the ExpressModelClient exposes, the generated client under com.anymindgroup.gcp.aiplatform.v1 can be used directly with an authenticated backend:

import zio.*

import com.anymindgroup.gcp.*
import auth.defaultAccessTokenBackend
import aiplatform.v1.*
import aiplatform.v1.resources.*
import aiplatform.v1.schemas.*

object vertex_ai_generate_content extends ZIOAppDefault:
  def run = for
    authedBackend <- defaultAccessTokenBackend()
    endpoint       = Endpoint.`asia-northeast1`
    request        = projects.locations.publishers.Models.generateContent(
                projectsId = "my-gcp-project",
                locationsId = endpoint.location,
                publishersId = "google",
                modelsId = "gemini-3.5-flash",
                request = GoogleCloudAiplatformV1GenerateContentRequest(
                  contents = Chunk(
                    GoogleCloudAiplatformV1Content(
                      parts = Chunk(
                        GoogleCloudAiplatformV1Part(
                          text = Some("hello how are you doing?")
                        )
                      ),
                      role = Some("user"),
                    )
                  ),
                  generationConfig = Some(
                    GoogleCloudAiplatformV1GenerationConfig(
                      thinkingConfig =
                        Some(GoogleCloudAiplatformV1GenerationConfigThinkingConfig(includeThoughts = Some(true)))
                    )
                  ),
                ),
                endpointUrl = endpoint.url,
              )
    _ <- authedBackend
           .send(request)
           .flatMap:
             _.body match
               case Right(body) => ZIO.logInfo(s"Response ok: $body")
               case Left(err)   => ZIO.logError(s"Failure: $err")
  yield ()