NeMo Platform CLI Development

The CLI provides a command-line interface for NeMo Platform, implemented using Typer in packages/nemoplatformext/src/nemoplatformext/cli/.

Command Categories

Directory Structure

packages/nemo_platform_ext/src/nemo_platform_ext/cli/
├── app.py                    # Entry point, command registration, global options
├── core/                     # Shared utilities
└── commands/
    ├── config.py             # kubectl-style config management
    ├── configure.py          # Interactive configuration
    ├── quickstart/           # Local deployment commands
    ├── use_cases/            # High-level commands (chat, wait)
    └── api/                  # ⚠️ AUTO-GENERATED - DO NOT EDIT

Building the CLI

Development Shortcut

During local CLI development, you can run nemo to execute the CLI directly from packages/nemoplatform_ext. This lets you test changes immediately without running vendoring first.

uv run _nemo --help

Use vendoring (make vendor-nemo-platform-ext) when you need to validate behavior in sdk/python/nemo-platform.

Build everything (recommended):

make update-cli

Individual steps:

# Step 1: Generate CLI commands from SDK
make generate-cli-commands

# Step 2: Vendor into SDK package
make vendor-nemo-platform-ext

# Step 3: Generate documentation
make generate-cli-reference-docs

Adding a Manual Command

Manual commands go in commands/use_cases/ or directly in commands/.

Pattern

from __future__ import annotations

from typing import Annotated

import typer

from nemo_platform_ext.cli.core.context import CLIContext
from nemo_platform_ext.cli.core.errors import handle_errors


@handle_errors
def my_command(
    ctx: typer.Context,
    name: Annotated[str, typer.Argument(help="The name argument")],
    option: Annotated[str | None,
        typer.Option(
            "--option",
            "-o",
            help="An optional flag",
            rich_help_panel="Options",
        ),
    ] = None,
) -> None:
    """
    Short description of what the command does.

    Examples:
      nemo my-command foo
      nemo my-command bar --option value
    """
    state: CLIContext = ctx.obj
    client = state.get_client()

    # Use client to make API calls
    result = client.some_resource.some_method(name=name)

    # Output result (use state.output() for formatted output)
    state.output(result)

Register in app.py

from nemo_platform_ext.cli.commands.my_module import my_command

# Single command
app.command(name="my-command", rich_help_panel="Use cases")(my_command)

# Command group (sub-app)
app.add_typer(my_sub_app, name="my-group", rich_help_panel="Category")

CLI Generator

The generator creates commands in commands/api/ from SDK introspection.

Key Files

tools/nemo-platform-sdk-tools/src/nemo_platform_sdk_tools/sdk/cli_generator/
├── cli_config.yaml           # Generation configuration
├── generator.py              # Main generation logic
├── sdk_introspector.py       # SDK introspection
├── operation_classifier.py   # Classifies methods (list, get, create, etc.)
├── templates/                # Jinja2 templates
├── context_collectors/       # Collect template context per operation type
└── overrides/                # Custom command implementations

Configuration (cli_config.yaml)

Configure table columns for list commands:

- resource: [customization, jobs]
  methods:
    list:
      columns:
      - name
      - description
      - status
      - created_at

Skip a method:

- resource: [filesets]
  methods:
    upload_file:
      skip: true

Use custom implementation:

- resource: [secrets]
  methods:
    create:
      override: secrets/create.py

Command Overrides

For methods requiring custom handling (file uploads, streaming), create overrides:

1. Add config in cli_config.yaml:

``yaml - resource: [files] additional_methods: upload: override: files/upload.py ``

1. Create override file in overrides/files/upload.py:

```python from typing import Annotated, Any, cast

import typer

from nemoplatformext.cli.core.context import CLIContext from nemoplatformext.cli.core.errors import handle_errors

app = cast(Any, None) # override-skip: provided by generated file

@app.command("upload") @handleerrors def uploadfiles( ctx: typer.Context, path: Annotated[str, typer.Argument(help="Local path to upload")], ) -> None: """Upload files to a fileset.""" state: CLIContext = ctx.obj client = state.get_client() # Custom implementation... ```

The # override-skip comment strips that line from output (useful for linter satisfaction).

Templates

Templates use Jinja2. Key variables available:

• command_name - CLI command name (e.g., "list")
• method_name - SDK method name (e.g., "list")
• resource_path - Resource path (e.g., ["customization", "jobs"])
• params - List of parameter info
• docstring - Method docstring

Core Utilities

CLIContext

Access via ctx.obj:

state: CLIContext = ctx.obj
client = state.get_client()  # Get SDK client
state.output(data)           # Format and print output
state.verbosity              # 0 or 1

Error Handling

Always use @handle_errors decorator:

from nemo_platform_ext.cli.core.errors import handle_errors

@handle_errors
def my_command(ctx: typer.Context) -> None:
    ...

Building API Request Bodies

from nemo_platform_ext.cli.core.api import build_kwargs

body = build_kwargs(
    model="my-model",
    messages=[{"role": "user", "content": "Hello"}],
    stream=True,
    temperature=0.7,
)

Testing

Run CLI tests:

uv run pytest packages/nemo_platform_ext/tests/cli/ -v

Run generator tests:

uv run --package nemo-platform-sdk-tools pytest tools/nemo-platform-sdk-tools/tests/sdk/cli_generator/ -v

Common Tasks

Add table columns for a new resource

Edit cli_config.yaml:

- resource: [my_service, my_resource]
  methods:
    list:
      columns:
      - name
      - status
      - created_at

Then rebuild: make update-cli

Add a new use-case command

1. Create file in commands/usecases/mycommand.py
2. Implement using pattern above
3. Register in app.py
4. Vendor: make vendor-nemo-platform-ext

Modify how a command is generated

1. Check which template is used (see operation_classifier.py)
2. Edit template in templates/
3. Rebuild: make update-cli

Override an auto-generated command

1. Add override config in cli_config.yaml
2. Create override file in overrides/
3. Rebuild: make update-cli

Troubleshooting

Typer errors after CLI update

If tests fail with Typer errors after running make update-cli, the issue is usually one of:

1. Unsupported type in Typer

Typer doesn't support all Python types (e.g., complex unions, nested TypedDicts). Fix by updating the generator code to handle the type:

• Check type_formatter.py for type formatting
• Check typeddictutils.py for TypedDict handling
• Add type conversion or simplification in the relevant context collector

2. Method miscategorized

The operation classifier may assign the wrong template (e.g., "default" instead of "create"). Fix via cli_config.yaml:

- resource: [my_service]
  methods:
    my_method:
      operation_type: create  # Override the auto-detected type

Available operation types: list, get, create, update, delete, download, default

3. Skip the method temporarily

If the fix is non-trivial, skip the method to unblock your work:

- resource: [my_service]
  methods:
    problematic_method:
      skip: true  # TODO: Fix...

Create a GitLab issue to track the fix, then rebuild: make update-cli