link to llm registry

Author: xingyaoww

sdk/guides/metrics.mdx

@@ -138,7 +138,7 @@ For more details on the available metrics and methods, refer to the [source code
 This example is available on GitHub: [examples/01_standalone_sdk/05_use_llm_registry.py](https://github.com/All-Hands-AI/agent-sdk/blob/main/examples/01_standalone_sdk/05_use_llm_registry.py)
 </Note>
 
-The LLM Registry allows you to maintain a centralized registry of LLM instances, each identified by a unique `usage_id`. This is particularly useful for tracking costs across different LLMs used in your application.
+The [LLM Registry](/sdk/guides/llm-registry) allows you to maintain a centralized registry of LLM instances, each identified by a unique `usage_id`. This is particularly useful for tracking costs across different LLMs used in your application.
 
 ```python icon="python" expandable examples/01_standalone_sdk/05_use_llm_registry.py
 import os