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fix(cli): honor user-defined providers via chat --provider and -m <alias>

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Three related issues prevented user-defined providers in `providers:` and
`model_aliases:` from being reachable through standard CLI flags. Requests
silently routed to the configured `model.base_url` instead of the user-
intended endpoint.

* hermes_cli/model_switch.py — root cause of the silent misrouting:
  `_ensure_direct_aliases()` rebound `DIRECT_ALIASES` to a freshly-loaded
  dict, leaving every `from hermes_cli.model_switch import DIRECT_ALIASES`
  caller stuck on the stale empty original. Switched to `.update()` so
  module attribute references stay valid.

* hermes_cli/main.py — chat subcommand `--provider` had `choices=[...]`
  hardcoded to built-in providers, rejecting valid keys from user
  `providers:` config. Dropped the choices list; runtime resolution
  validates correctly downstream.

* hermes_cli/oneshot.py — `-m <alias>` only resolved the model name; the
  alias's base_url was never propagated. Now consults `DIRECT_ALIASES`
  before falling through to `detect_provider_for_model`, and threads the
  alias's base_url to `resolve_runtime_provider(explicit_base_url=...)`.

* hermes_cli/runtime_provider.py — `_resolve_named_custom_runtime` now
  honors `(provider="custom", explicit_base_url=...)` so a base_url
  propagated from a direct-alias resolution actually builds a runtime
  instead of falling through to provider-registry handlers that don't
  know about ad-hoc local endpoints.

Verified: `hermes chat --provider <user-key> -m <model> -q "..."` and
`hermes -m <user-alias> -z "..."` both route to the user-intended
endpoint, observable via the target server's request log.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
westers 2026-04-27 21:15:12 -05:00 • committed by Teknium
parent afb9588298
commit 632ddf2a0a
4 changed files with 65 additions and 39 deletions
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11
hermes_cli/model_switch.py
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@ -213,10 +213,15 @@ def _load_direct_aliases() -> dict[str, DirectAlias]:
def _ensure_direct_aliases() -> None:
"""Lazy-load direct aliases on first use."""
global DIRECT_ALIASES
"""Lazy-load direct aliases on first use.
Mutates the existing DIRECT_ALIASES dict in place rather than rebinding
the module attribute. This keeps `from hermes_cli.model_switch import
DIRECT_ALIASES` references valid in callers — rebinding would leave them
pointing at a stale empty dict.
"""
if not DIRECT_ALIASES:
DIRECT_ALIASES = _load_direct_aliases()
DIRECT_ALIASES.update(_load_direct_aliases())
# ---------------------------------------------------------------------------