fix: Claude w/bedrock custom inference profile - caching support (#9838)

Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com>

packages/web/src/content/docs/providers.mdx

@@ -229,6 +229,27 @@ To use Amazon Bedrock with OpenCode:
    /models
    ```
 
+:::note
+For custom inference profiles, use the model and provider name in the key and set the `id` property to the arn. This ensures correct caching:
+
+```json title="opencode.json"
+{
+  "$schema": "https://opencode.ai/config.json",
+  "provider": {
+    "amazon-bedrock": {
+      // ...
+      "models": {
+        "anthropic-claude-sonnet-4.5": {
+          "id": "arn:aws:bedrock:us-east-1:xxx:application-inference-profile/yyy"
+        }
+      }
+    }
+  }
+}
+```
+
+:::
+
 ---
 
 ### Anthropic