Follow-up to @helix4u's #57336 salvage. Two review findings:
- W1: model-picker grouped custom-provider rows by
(api_url, credential, api_mode) but NOT extra_headers. Entries sharing a
URL+credential+api_mode yet declaring different headers (e.g. per-tenant
routing behind one proxy) collapsed into one row and probed /models with
whichever header set was seen first (order-dependent). Fold a canonical
header identity into group_key so distinct header-authed endpoints stay
separate; drops the now-dead first-non-empty merge branch.
- W2: the extra_headers stringify+None-filter comprehension existed in 5
copies (config.py x2, runtime_provider.py, model_switch.py, models.py).
Extract one shared hermes_cli.config.normalize_extra_headers primitive;
all sites now call it.
Tests: +normalize_extra_headers unit tests, +regression test proving two
same-endpoint entries with different headers stay distinct and each probes
with its own headers. 223 targeted tests pass; ruff clean.
Named providers / custom_providers entries in config.yaml now accept an
extra_headers dict scoped to that endpoint — for reverse proxies, API
gateways, and custom auth schemes (e.g. Cloudflare Access service tokens).
- hermes_cli/config.py: normalize extra_headers on provider entries
(_normalize_custom_provider_entry + providers-dict translation), add
get_custom_provider_extra_headers /
apply_custom_provider_extra_headers_to_client_kwargs helpers keyed on
base_url (case/trailing-slash insensitive, no substring bypass —
mirrors the TLS helpers)
- hermes_cli/runtime_provider.py: surface extra_headers in the resolved
runtime for named custom providers (providers dict, legacy
custom_providers list, and the credential-pool path)
- run_agent.py / agent/agent_init.py: merge per-provider extra_headers
onto the OpenAI client default_headers at construction and on every
_apply_client_headers_for_base_url re-application (credential swaps,
rebuilds), most-specific level wins; OpenAI-wire only (native
Anthropic/Bedrock scoped out)
- agent/auxiliary_client.py: accept model.extra_headers as an alias of
model.default_headers for the global variant
- cli-config.yaml.example: documented commented example
- Header values are treated as secrets and never logged
Salvaged from PR #3526 by @jneeee, reimplemented against current main.
Co-authored-by: Teknium <127238744+teknium1@users.noreply.github.com>
