Files
hermes-agent/hermes_cli
kshitijk4poor ed4123792c refactor(providers): dedupe extra_headers normalizer + key picker groups by headers
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.
2026-07-03 04:23:15 +05:30
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