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Add NovitaAI as a first-class provider with dedicated model selection flow, live pricing, and authoritative context length resolution. - Register provider in PROVIDER_REGISTRY, HERMES_OVERLAYS, and all alias/label maps (ID: novita, aliases: novita-ai, novitaai) - Add dedicated _model_flow_novita() with 3-tier model list fallback: Novita API → models.dev → static curated list - Fetch live pricing from /v1/models with correct unit conversion (input_token_price_per_m is 0.0001 USD per Mtok) - Add Novita-specific context length resolution (step 4b) in get_model_context_length(), prioritized over models.dev/OpenRouter - Register api.novita.ai in _URL_TO_PROVIDER to prevent early return from the custom-endpoint code path - Add models.dev mapping (novita → novita-ai) - Add default auxiliary model (deepseek/deepseek-v3-0324) - Add NOVITA_API_KEY to test isolation (conftest.py) - Update docs: providers page, env vars reference, CLI reference, .env.example, README, and landing page
Model Provider Plugins
Each subdirectory is a self-contained provider profile plugin. The
directory layout mirrors plugins/platforms/:
plugins/model-providers/
├── openrouter/
│ ├── __init__.py # registers the ProviderProfile
│ └── plugin.yaml # manifest: name, kind, version, description
├── anthropic/
│ ├── __init__.py
│ └── plugin.yaml
└── ...
How discovery works
providers/__init__.py._discover_providers() scans this directory (and
$HERMES_HOME/plugins/model-providers/) the first time anything calls
get_provider_profile() or list_providers(). Each __init__.py is
imported and expected to call providers.register_provider(profile).
User plugins at $HERMES_HOME/plugins/model-providers/<name>/ override
bundled plugins of the same name — last-writer-wins in
register_provider(). Drop a file there to replace a built-in.
Adding a new provider
-
Create
plugins/model-providers/<your_provider>/__init__.py:from providers import register_provider from providers.base import ProviderProfile my_provider = ProviderProfile( name="your-provider", aliases=("alias1", "alias2"), display_name="Your Provider", description="One-line description shown in the setup picker", signup_url="https://your-provider.example.com/keys", env_vars=("YOUR_PROVIDER_API_KEY", "YOUR_PROVIDER_BASE_URL"), base_url="https://api.your-provider.example.com/v1", default_aux_model="your-cheap-model", ) register_provider(my_provider) -
Create
plugins/model-providers/<your_provider>/plugin.yaml:name: your-provider-profile kind: model-provider version: 1.0.0 description: Short sentence about the provider author: Your Name
Nothing else needs to change. auth.py, config.py, models.py,
doctor.py, model_metadata.py, runtime_provider.py, and the
chat_completions transport all auto-wire from the registry.
Non-trivial profiles
Override the ProviderProfile hooks in a subclass for per-provider
quirks — see plugins/model-providers/openrouter/__init__.py for
build_extra_body and build_api_kwargs_extras examples, and
plugins/model-providers/gemini/__init__.py for thinking_config
translation.