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teknium1 d364473620 refactor(model-providers): fetch_models stubs drop to the ABC; commandcode and AI Gateway catalog GETs go through open_credentialed_url 
vertex, bedrock and copilot-acp each overrode ProviderProfile.fetch_models with an identical `return None`, and the overrides could not simply be deleted because the base implementation derives a URL from base_url and would GET e.g. bedrock-runtime.../models or acp://copilot/models. ProviderProfile now carries `supports_model_listing` (default True); the base fetch_models returns None before touching the network when it is False, and the three SDK/subprocess-backed profiles set it in their constructors instead of overriding. Separately, two catalog GETs still went through bare urllib.request.urlopen: commandcode's fetch_models and hermes_cli.models._fetch_ai_gateway_models (which sends the AI Gateway bearer). Both now use the redirect-safe open_credentialed_url path (_urlopen_model_catalog_request in models.py, also applied to the unauthenticated fetch_ai_gateway_models for consistency). This is a security behavior change: a cross-origin redirect from either endpoint no longer forwards the Authorization/attribution headers to the redirect target. The AI Gateway tests that patched the global urlopen are repointed at hermes_cli.models._urlopen_model_catalog_request (the seam tests/hermes_cli/test_models.py already uses), the commandcode test patches open_credentialed_url on the plugin module, and two invariant tests pin the no-network guard and the bearer routing.
2026-09-13 05:19:48 -07:00
..
__init__.py
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base.py
refactor(model-providers): fetch_models stubs drop to the ABC; commandcode and AI Gateway catalog GETs go through open_credentialed_url
2026-09-13 05:19:48 -07:00
README.md
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README.md

providers/

Registry and ABC for every inference provider Hermes knows about.

Each provider is declared once as a ProviderProfile. Every other layer — auth resolution, transport kwargs, model listing, runtime routing — reads from these profiles instead of maintaining its own parallel data.

Layout

providers/
├── base.py         ProviderProfile dataclass + OMIT_TEMPERATURE sentinel
├── __init__.py     Registry: register_provider(), get_provider_profile(), list_providers()
└── README.md       This file

The profiles themselves live as plugins under plugins/model-providers/<name>/ (bundled in this repo) and $HERMES_HOME/plugins/model-providers/<name>/ (per-user overrides). The registry in providers/__init__.py lazily discovers them the first time any consumer calls get_provider_profile() or list_providers(). See plugins/model-providers/README.md for the plugin contract and examples.

How it wires in

The registry is populated on first access. After that, every downstream layer reads from it:

  • hermes_cli/auth.py extends PROVIDER_REGISTRY with every api-key profile it sees (skipping copilot, kimi-coding, kimi-coding-cn, zai, openrouter, custom — those need bespoke token resolution).
  • hermes_cli/models.py extends CANONICAL_PROVIDERS and calls profile.fetch_models() inside provider_model_ids().
  • hermes_cli/doctor.py adds a /models health check for each auth_type="api_key" profile.
  • hermes_cli/config.py injects every env_var into OPTIONAL_ENV_VARS so the setup wizard knows about it.
  • hermes_cli/runtime_provider.py reads profile.api_mode as a fallback when URL detection finds nothing.
  • agent/model_metadata.py maps hostname → provider via profile.get_hostname().
  • agent/auxiliary_client.py reads profile.default_aux_model first before falling back to the legacy hardcoded dict.
  • agent/transports/chat_completions.py::_build_kwargs_from_profile() invokes profile.prepare_messages(), profile.build_extra_body(), and profile.build_api_kwargs_extras() on every call.
  • run_agent.py passes provider_profile=<ProviderProfile> so the transport takes the profile path instead of the legacy flag path.

Adding a provider

See plugins/model-providers/README.md — drop a new directory there (or under $HERMES_HOME/plugins/model-providers/ for a private plugin).

Hooks you can override on ProviderProfile

Hook Purpose
get_hostname() URL-based detection — default derives from base_url.
prepare_messages(msgs) Provider-specific message preprocessing (Qwen normalises to list-of-parts, injects cache_control).
build_extra_body(**ctx) Provider-specific extra_body (OpenRouter provider prefs, Gemini thinking_config).
build_api_kwargs_extras(**ctx) (extra_body_additions, top_level_kwargs) — Kimi puts reasoning_effort top-level, Qwen splits enable_thinking/thinking_budget.
supported_reasoning_efforts(model) Declared per-model reasoning-effort vocabulary for gateways that 400 on unknown levels (Ramp Router reads its live catalog). None = defer to transport defaults, () = model takes no reasoning params, tuple = clamp target. Must be cache-only — called on the request hot path.
fetch_models(*, api_key) Live catalog fetch — default hits {models_url or base_url}/models with Bearer auth. Override for no-REST providers (Bedrock), OAuth catalogs (Anthropic), or public catalogs (OpenRouter).

Configuration fields

Full reference in providers/base.py dataclass definition.