Teknium 1e37ddc929 feat(cli): add 'hermes fallback' command to manage fallback providers (#16052) ...

Manage the fallback_providers chain from the CLI instead of hand-editing
config.yaml. The picker reuses select_provider_and_model() from 'hermes
model' — same provider list, same credential prompts, same model picker.

  hermes fallback [list]   Show the current chain (primary + fallbacks)
  hermes fallback add      Run the model picker, append selection to chain
  hermes fallback remove   Pick an entry to delete (arrow-key menu)
  hermes fallback clear    Remove all entries (with confirmation)

'add' snapshots config['model'] before calling the picker, extracts the
user's selection from the post-picker state, then restores the primary
and appends {provider, model, base_url?, api_mode?} to fallback_providers.
Auth store's active_provider is snapshot/restored too so OAuth-provider
fallbacks don't silently deactivate the user's primary. Duplicates and
self-as-fallback are rejected. Legacy single-dict 'fallback_model' entries
are auto-migrated to the list format on first write.

2026-04-26 06:19:04 -07:00

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