Each `generator` that you define in your BAML project will tell `baml-cli
generate` to generate code for a specific target language. You can define
multiple `generator` clauses in your BAML project, and `baml-cli generate` will
generate code for each of them.

<Tip>
  If you created your project using 

  `baml-cli init`

  , then one has already been generated for you!
</Tip>

<CodeBlocks>
  ```baml Python
  generator target {
      output_type "python/pydantic"

      // Where the generated code will be saved (relative to baml_src/)
      output_dir "../"

      // What interface you prefer to use for the generated code (sync/async)
      // Both are generated regardless of the choice, just modifies what is exported
      // at the top level
      default_client_mode "sync"

      // Version of runtime to generate code for (should match installed baml-py version)
      version "0.76.2"
  }
  ```

  ```baml Python (Pydantic 1.x)
  generator target {
      // Generate code will be compatible with Pydantic 1.x
      output_type "python/pydantic/v1"

      // Where the generated code will be saved (relative to baml_src/)
      output_dir "../"

      // What interface you prefer to use for the generated code (sync/async)
      // Both are generated regardless of the choice, just modifies what is exported
      // at the top level
      default_client_mode "sync"

      // Version of runtime to generate code for (should match installed baml-py version)
      version "0.76.2"

      // Optional: run formatters or other tools after generating the client code
      on_generate "black . && isort ."
  }
  ```

  ```baml TypeScript
  generator target {
      output_type "typescript"

      // Where the generated code will be saved (relative to baml_src/)
      output_dir "../"

      // What interface you prefer to use for the generated code (sync/async)
      // Both are generated regardless of the choice, just modifies what is exported
      // at the top level
      default_client_mode "async"

      // Version of runtime to generate code for (should match the package @boundaryml/baml version)
      version "0.76.2"

      // The format of the generated module.
      // "esm" - Use ES modules
      // "cjs" - Use CommonJS modules (default)
      module_format "cjs"
  }
  ```

  ```baml React/Next.js
  generator target {
      output_type "typescript/react"

      // Where the generated code will be saved (relative to baml_src/)
      output_dir "../"

      // What interface you prefer to use for the generated code (sync/async)
      // Both are generated regardless of the choice, just modifies what is exported
      // at the top level
      default_client_mode "async"

      // Version of runtime to generate code for (should match the package @boundaryml/baml version)
      version "0.76.2"

      // The format of the generated module.
      // "esm" - Use ES modules
      // "cjs" - Use CommonJS modules (default)
      module_format "cjs"

      // Optional: run formatters or other tools after generating the client code
      on_generate "prettier . --write"
  }
  ```

  ```baml Ruby (beta)
  generator target {
      output_type "ruby/sorbet"

      // Where the generated code will be saved (relative to baml_src/)
      output_dir "../"

      // Version of runtime to generate code for (should match installed `baml` package version)
      version "0.76.2"
  }
  ```

  ```baml Go
  generator target {
      output_type "go"

      // Where the generated code will be saved (relative to baml_src/)
      output_dir "../"

      // Version of runtime to generate code for (should match installed github.com/boundaryml/baml version)
      version "0.205.0"

      // Go module name for the generated client
      client_package_name "example.com/myproject"

      // Commands to run after code generation (mandatory for proper code formatting)
      on_generate "gofmt -w . && goimports -w . && go mod tidy"
  }
  ```

  ```baml OpenAPI
  generator target {
      output_type "rest/openapi"

      // Where the generated code will be saved (relative to baml_src/)
      output_dir "../"

      // Version of runtime to generate code for (should match installed `baml` package version)
      version "0.76.2"

      // 'baml-cli generate' will run this after generating openapi.yaml, to generate your OpenAPI client
      // This command will be run from within $output_dir
      on_generate "npx @openapitools/openapi-generator-cli generate -i openapi.yaml -g OPENAPI_CLIENT_TYPE -o ."
  }
  ```
</CodeBlocks>