Fixes#7828
When a custom_providers entry carries a `model` field, that value was
silently dropped by `_get_named_custom_provider` and
`_resolve_named_custom_runtime`. Callers received a runtime dict with
`base_url`, `api_key`, and `api_mode` — but no `model`.
As a result, `hermes chat --model <provider-name>` sent the *provider
name* (e.g. "my-dashscope-provider") as the model string to the API
instead of the configured model (e.g. "qwen3.6-plus"), producing:
Error code: 400 - {'error': {'message': 'Model Not Exist'}}
Setting the provider as the *default* model in config.yaml worked
because that path writes `model.default` and the agent reads it back
directly, bypassing the broken runtime resolution path.
Changes:
1. hermes_cli/runtime_provider.py — _get_named_custom_provider()
Reads `entry.get("model")` and includes it in the result dict so
the value is available to callers.
2. hermes_cli/runtime_provider.py — _resolve_named_custom_runtime()
Propagates `custom_provider["model"]` into the returned runtime dict.
3. cli.py — _ensure_runtime_credentials()
After resolving runtime, if `runtime["model"]` is set, assign it to
`self.model` so the AIAgent is initialised with the correct model
name rather than the provider name the user typed on the CLI.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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