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fix(providers): set User-Agent on ProviderProfile.fetch_models

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Some catalog endpoints (OpenCode Zen, etc.) sit behind a WAF that
returns 403 for the default Python-urllib/<ver> User-Agent.  The
generic profile-based live fetch in providers/base.py was silently
failing for any such provider — falling through to the static catalog
and missing newly-launched models.

Set a generic 'hermes-cli/<version>' UA on the catalog probe so every
api_key provider profile benefits.  Verified live against opencode-zen:
before this change, profile.fetch_models() raised HTTP 403; after, it
returns 42 models including gpt-5.5, gpt-5.5-pro, kimi-k2.6, glm-5.1
and the *-free variants the static catalog doesn't list.

Also strip the now-stale comment in validate_requested_model() claiming
opencode-zen's /models returns 404 against the HTML marketing site —
the API endpoint at /zen/v1/models returns 200 with valid JSON.

Surfaced by #2651 (@aashizpoudel) — fixes the same user-facing gap
their PR targeted, applied at the right layer so all api_key provider
profiles get live catalogs through the same code path.

Co-authored-by: Aashish Poudel <mr.aashiz@gmail.com>
This commit is contained in:
teknium1 2026-05-15 01:38:30 -07:00 • committed by Teknium
parent 647cc0bb0d
commit 5360b54244
3 changed files with 26 additions and 7 deletions
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13
hermes_cli/models.py
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@ -3702,13 +3702,12 @@ def validate_requested_model(
# Static-catalog fallback: when the /models probe was unreachable,
# validate against the curated list from provider_model_ids() — same
# pattern as the openai-codex and minimax branches above. This fixes
# /model switches in the gateway for providers like opencode-go and
# opencode-zen whose /models endpoint returns 404 against the HTML
# marketing site. Without this block, validate_requested_model would
# reject every model on such providers, switch_model() would return
# success=False, and the gateway would never write to
# _session_model_overrides.
# pattern as the openai-codex and minimax branches above. This keeps
# /model switches working in the gateway for providers whose /models
# endpoint is temporarily unreachable or returns a non-JSON payload.
# Without this block, validate_requested_model would reject every model
# on such providers, switch_model() would return success=False, and
# the gateway would never write to _session_model_overrides.
provider_label = _PROVIDER_LABELS.get(normalized, normalized)
try:
catalog_models = provider_model_ids(normalized)