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lqiu96gemini-code-assist[bot]
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gemini-code-assist[bot]
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chore: Add a library generation skill (#12689)
Trying out a new agent skill for new library generation requests. Uses internal MCP tools and skills to pull the relevant information. This should allow workflows where we can prompt gemini for `Generate a new library for b/XXXXX` Interestingly, this PR uses AI to generate commands to tell AI how to automatically generate a library request --------- Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
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‎.agents/skills/new-client-library-generator/SKILL.md‎

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---
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name: new-client-library-generator
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description: Generates new Google Cloud Java client libraries by processing service information and updating the hermetic build configuration. Use this skill when tasked with onboarding a new service or version to the google-cloud-java repository.
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---
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# New Client Library Generator
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This skill automates the process of adding a new client library to the `google-cloud-java` repository using the hermetic build system. It retrieves service information from a Buganizer ticket (which links to a Service YAML file) and runs the configuration script to update `generation_config.yaml`.
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## Workflow
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### 1. Retrieve Service Information from Buganizer
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Use the available Buganizer MCP server to fetch the ticket content. The ticket will contain a link to a Service YAML file. Parse this YAML file to extract the fields below.
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> [!IMPORTANT]
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> Not all fields in the Service YAML file may exist. You must ensure that all **Required** fields are identified and populated before executing the generation script.
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**Required:**
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- `api_shortname`: Unique service identifier (e.g., `alloydb`).
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- `name_pretty`: Human-friendly name (e.g., `AlloyDB API`).
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- `proto_path`: Versioned path to protos (e.g., `google/cloud/alloydb/v1`). Must include the version component — root-level paths like `google/cloud/alloydb` are not supported.
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- `product_docs`: Product documentation URL (must start with `https://`).
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- `api_description`: First sentence of the service summary.
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**Optional:**
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- `rest_docs`: REST reference documentation URL.
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- `rpc_docs`: RPC/proto reference documentation URL.
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- `library_name`: Override the default `java-<api_shortname>` directory name.
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- `distribution_name`: Override Maven coordinates (default: `com.google.cloud:google-cloud-<api_shortname>`).
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For the field-to-flag mapping, see [references/service_yaml_mapping.md](references/service_yaml_mapping.md) (Service YAML fields → script flags).
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### 2. Check for Conflicts
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Before running the script, verify `api_shortname` is not already in use:
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```bash
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grep "api_shortname: <API_SHORTNAME>" generation_config.yaml
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```
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If a conflict exists, determine a unique name or use `--library-name` to set a distinct directory. See [references/generation_guide.md](references/generation_guide.md) for examples.
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### 3. Special Cases
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Some APIs require non-default Maven coordinates and `api_shortname` values:
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| Proto path prefix | `--api-shortname` | `--distribution-name` |
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|---------------------|------------------------------|----------------------------------------------------------|
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| `google/maps/*` | `maps-<api_short_name>` | `com.google.maps:google-maps-<api_short_name>` |
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| `google/shopping/*` | `shopping-<api_short_name>` | `com.google.shopping:google-shopping-<api_short_name>` |
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where `<api_short_name>` is the value from the Service YAML.
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### 4. Execution
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#### Adding a new library
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If the library does not exist yet, run the script with the gathered information:
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```bash
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python3 generation/new_client_hermetic_build/add-new-client-config.py add-new-library \
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--api-shortname="[API_SHORTNAME]" \
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--name-pretty="[NAME_PRETTY]" \
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--proto-path="[PROTO_PATH]" \
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--product-docs="[PRODUCT_DOCS]" \
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--api-description="[API_DESCRIPTION]" \
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[OPTIONAL_FLAGS]
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```
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The script modifies `generation_config.yaml` and sorts the `libraries` list alphabetically.
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To see all available flags:
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```bash
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python3 generation/new_client_hermetic_build/add-new-client-config.py add-new-library --help
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```
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#### Adding a new version to an existing library
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If the client library module already exists and the request is to add a new version, do NOT run the script. Instead, manually add the corresponding `proto_path` for the new version to the `GAPICs` list of the existing library entry in `generation_config.yaml`.
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Example entry update:
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```yaml
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- api_shortname: myapi
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...
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GAPICs:
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- proto_path: google/cloud/myapi/v1
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- proto_path: google/cloud/myapi/v2 # Manually added
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```
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### 5. Verification
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After execution or manual update:
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1. Confirm `generation_config.yaml` has a new or updated entry with the correct fields. See [references/generation_config_schema.md](references/generation_config_schema.md).
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2. Confirm `proto_path` under `GAPICs` includes a version component (e.g., `v1`, `v1beta`, `v1alpha`).
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3. Confirm `product_documentation` starts with `https://`.
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### 6. Create a Branch and PR
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After verifying the changes:
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```bash
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git checkout -b "new-library/[API_SHORTNAME]"
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git add generation_config.yaml
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git commit -m "feat: new module for [API_SHORTNAME]"
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```
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Then open a pull request. The Pull Request body must only contain the `add-new-library` command used.
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**PR Body Template:**
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```text
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Command used:
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python3 generation/new_client_hermetic_build/add-new-client-config.py add-new-library \
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--api-shortname="[API_SHORTNAME]" \
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--name-pretty="[NAME_PRETTY]" \
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--proto-path="[PROTO_PATH]" \
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--product-docs="[PRODUCT_DOCS]" \
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--api-description="[API_DESCRIPTION]" \
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[OPTIONAL_FLAGS]
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```
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The hermetic library generation workflow will be triggered automatically upon changes to `generation_config.yaml`.

‎.agents/skills/new-client-library-generator/references/generation_config_schema.md‎

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# generation_config.yaml Schema
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The `generation_config.yaml` file at the root of the repository controls the generation of all client libraries.
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## Key Fields
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- `gapic_generator_version`: The version of the GAPIC generator used globally (unless overridden).
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- `googleapis_commitish`: The commit of the `googleapis` repository used as the source for protos.
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- `libraries`: A list of library configurations.
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### Library Configuration Fields
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**Required (always present):**
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- `api_shortname`: (String) Identifier (e.g., `alloydb`).
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- `name_pretty`: (String) Display name (e.g., `AlloyDB API`).
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- `product_documentation`: (URL) Product documentation URL.
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- `api_description`: (String) Service description.
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- `client_documentation`: (URL) Auto-generated link to the generated client docs.
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- `release_level`: (String) Usually `preview` for new libraries.
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- `distribution_name`: (String) Maven coordinates (e.g., `com.google.cloud:google-cloud-alloydb`).
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- `api_id`: (String) API identifier (e.g., `alloydb.googleapis.com`).
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- `library_type`: (String) Usually `GAPIC_AUTO`.
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- `group_id`: (String) Maven group ID (e.g., `com.google.cloud`).
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- `cloud_api`: (Boolean) `true` if distribution name starts with `google-cloud-`.
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- `GAPICs`: (List) List of proto paths to generate from.
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- `proto_path`: (String) Path to versioned protos (must include version, e.g., `google/cloud/alloydb/v1`).
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**Optional:**
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- `library_name`: (String) Override the output directory name (without `java-` prefix).
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- `rest_documentation`: (URL) REST reference documentation URL.
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- `rpc_documentation`: (URL) RPC/proto reference documentation URL.
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- `requires_billing`: (Boolean) Whether billing is required (default: `true`).
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- `api_reference`: (URL) API reference documentation link.
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- `codeowner_team`: (String) GitHub team responsible for this library.
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- `googleapis_commitish`: (String) Pin to a specific `googleapis/googleapis` commit (overrides repo-level setting).
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- `issue_tracker`: (URL) Issue tracker for this library.
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- `extra_versioned_modules`: (String) Extra modules managed via `versions.txt`.
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- `excluded_dependencies`: (String) Comma-separated dependencies excluded from postprocessing.
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- `excluded_poms`: (String) Comma-separated pom files excluded from postprocessing.
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## Example Library Entry
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```yaml
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- api_shortname: alloydb
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name_pretty: AlloyDB API
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product_documentation: https://cloud.google.com/alloydb/docs
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api_description: AlloyDB for PostgreSQL is an open source-compatible database service.
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client_documentation: https://cloud.google.com/java/docs/reference/google-cloud-alloydb/latest/overview
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release_level: preview
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distribution_name: com.google.cloud:google-cloud-alloydb
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api_id: alloydb.googleapis.com
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library_type: GAPIC_AUTO
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group_id: com.google.cloud
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cloud_api: true
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GAPICs:
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- proto_path: google/cloud/alloydb/v1
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```

‎.agents/skills/new-client-library-generator/references/generation_guide.md‎

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# New Client Library Generation Guide
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This guide describes how to generate a new client library by:
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1. Appending a new library configuration to `generation_config.yaml` using the provided scripts.
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2. Relying on the automated GitHub Actions to generate the code once the configuration is pushed in a Pull Request.
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## Components
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### `generation/new_client_hermetic_build/add-new-client-config.py`
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This script updates `generation_config.yaml` with the necessary metadata for a new library. It takes several arguments that map to fields in the configuration file.
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## Local Execution
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To add a new library configuration, you must run the `add-new-client-config.py` script. The parameters for this script are typically found in the **Service YAML** file linked in the Buganizer request.
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### Basic Usage
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```bash
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python3 generation/new_client_hermetic_build/add-new-client-config.py add-new-library \
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--api-shortname="[API_SHORTNAME]" \
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--name-pretty="[NAME_PRETTY]" \
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--proto-path="[PROTO_PATH]" \
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--product-docs="[PRODUCT_DOCS]" \
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--api-description="[API_DESCRIPTION]"
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```
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### Parameter Details
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#### API Short Name (`--api-shortname`)
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The unique identifier for the library (e.g., `alloydb`). This is used to determine the directory name and default artifact name.
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- **Source:** `api_short_name` in the Service YAML.
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#### Proto Path (`--proto-path`)
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The path from the root of the `googleapis` repository to the directory containing the versioned proto definitions.
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- **Example:** `google/cloud/alloydb/v1beta`
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- **Note:** Root-level paths like `google/cloud/alloydb` are not supported.
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#### Name Pretty (`--name-pretty`)
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The human-friendly name of the API.
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- **Source:** `title` in the Service YAML.
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- **Example:** `AlloyDB API`
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#### Product Docs (`--product-docs`)
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The URL for the product documentation. Must start with `https://`.
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- **Source:** `documentation_uri` in the Service YAML.
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#### API Description (`--api-description`)
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A concise summary of the API for the README.
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- **Source:** `documentation.summary` or `documentation.overview` in the Service YAML. Use the first sentence.
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## Prerequisites
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Ensure you have the following set up in your local environment:
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1. **Python 3.9+**: The scripts require Python 3.9 or higher.
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2. **Dependencies**: Install the required Python packages from the root of the repository:
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```bash
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pip install -r generation/new_client_hermetic_build/requirements.txt
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```
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## Advanced Options
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For full control over the generation (e.g., overriding Maven coordinates or library names), run the script with the `--help` flag:
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```bash
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python3 generation/new_client_hermetic_build/add-new-client-config.py add-new-library --help
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```
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### Special Case: Non-Cloud APIs
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Some libraries (like Google Maps or Shopping) require special handling for Maven coordinates.
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| API Path Prefix | `--api-shortname` | `--distribution-name` |
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|---|---|---|
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| `google/maps/*` | `maps-<shortname>` | `com.google.maps:google-maps-<shortname>` |
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| `google/shopping/*` | `shopping-<shortname>` | `com.google.shopping:google-shopping-<shortname>` |

‎.agents/skills/new-client-library-generator/references/service_yaml_mapping.md‎

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# Service YAML Mapping to Generation Script Parameters
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This document explains how to extract information from a Service YAML file (linked in a Buganizer ticket) to populate the parameters for `generation/new_client_hermetic_build/add-new-client-config.py`.
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| Service YAML Field | Script Parameter (`--flag`) | Description |
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|---|---|---|
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| `api_short_name` | `api-shortname` | Unique identifier for the service (e.g., `alloydb`). |
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| (extracted from proto) | `proto-path` | Path from the root of the googleapis repository to the versioned proto directory (e.g., `google/cloud/alloydb/v1alpha`). Root-level paths like `google/cloud/alloydb` are not supported. |
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| `title` | `name-pretty` | Human-friendly name (e.g., `AlloyDB API`). |
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| `documentation_uri` | `product-docs` | Product documentation URL. Must start with `https://`. |
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| `rest_reference_documentation_uri` | `rest-docs` | REST documentation URL. Optional. |
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| `proto_reference_documentation_uri` | `rpc-docs` | RPC/Proto documentation URL. Optional. |
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| `documentation.summary` or `documentation.overview` | `api-description` | Concise summary of the service. Use the first sentence. |
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## Example Mapping
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**Service YAML File excerpt:**
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```yaml
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title: "Discovery Engine API"
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api_short_name: "discoveryengine"
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documentation_uri: "https://cloud.google.com/generative-ai-app-builder/docs/introduction"
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rest_reference_documentation_uri: "https://cloud.google.com/generative-ai-app-builder/docs/reference/rest"
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proto_reference_documentation_uri: "https://cloud.google.com/generative-ai-app-builder/docs/reference/rpc"
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documentation:
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summary: "Discovery Engine for Search and Recommendations"
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```
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**Protos in `googleapis` repository:**
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`google/cloud/discoveryengine/v1/`
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**Generated Command:**
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```bash
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python3 generation/new_client_hermetic_build/add-new-client-config.py add-new-library \
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--api-shortname="discoveryengine" \
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--name-pretty="Discovery Engine API" \
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--proto-path="google/cloud/discoveryengine/v1" \
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--product-docs="https://cloud.google.com/generative-ai-app-builder/docs/introduction" \
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--rest-docs="https://cloud.google.com/generative-ai-app-builder/docs/reference/rest" \
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--rpc-docs="https://cloud.google.com/generative-ai-app-builder/docs/reference/rpc" \
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--api-description="Discovery Engine for Search and Recommendations"
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```

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