Merge pull request #740 from NousResearch/hermes/hermes-3cd7c62d

feat: simple fallback model for provider resilience (#737)

hermes_cli/config.py

@@ -103,6 +103,27 @@ DEFAULT_CONFIG = {
         },
     },
     
+    # Fallback model — used when the primary model/provider fails after retries.
+    # When the primary hits rate limits (429), overload (529), or service errors (503),
+    # Hermes will automatically switch to this model for the remainder of the session.
+    # Set to None / omit to disable fallback.
+    #
+    # Supported providers (auto-resolve base_url and API key from env):
+    #   openrouter   (OPENROUTER_API_KEY)   — routes to any model
+    #   zai          (ZAI_API_KEY)          — Z.AI / GLM
+    #   kimi-coding  (KIMI_API_KEY)         — Kimi / Moonshot
+    #   minimax      (MINIMAX_API_KEY)      — MiniMax
+    #   minimax-cn   (MINIMAX_CN_API_KEY)   — MiniMax (China)
+    #
+    # For any other OpenAI-compatible endpoint, use base_url + api_key_env.
+    "fallback_model": {
+        "provider": "",   # provider name from the list above
+        "model": "",      # model slug, e.g. "anthropic/claude-sonnet-4"
+        # Optional overrides (usually auto-resolved from provider):
+        # "base_url": "",       # custom endpoint URL
+        # "api_key_env": "",    # env var name for API key (e.g. "MY_CUSTOM_KEY")
+    },
+
     "display": {
         "compact": False,
         "personality": "kawaii",