feat: sticky auth profile rotation + usage headers

docs/gateway/configuration-examples.md

@@ -455,6 +455,44 @@ Save to `~/.clawdbot/clawdbot.json` and you can DM the bot from that number.
 }
 ```
 
+### Anthropic subscription + API key, MiniMax fallback
+```json5
+{
+  auth: {
+    profiles: {
+      "anthropic:subscription": {
+        provider: "anthropic",
+        mode: "oauth",
+        email: "user@example.com"
+      },
+      "anthropic:api": {
+        provider: "anthropic",
+        mode: "api_key"
+      }
+    },
+    order: {
+      anthropic: ["anthropic:subscription", "anthropic:api"]
+    }
+  },
+  models: {
+    providers: {
+      minimax: {
+        baseUrl: "https://api.minimax.io/anthropic",
+        api: "anthropic-messages",
+        apiKey: "${MINIMAX_API_KEY}"
+      }
+    }
+  },
+  agent: {
+    workspace: "~/clawd",
+    model: {
+      primary: "anthropic/claude-opus-4-5",
+      fallbacks: ["minimax/MiniMax-M2.1"]
+    }
+  }
+}
+```
+
 ### Work bot (restricted access)
 ```json5
 {