Merge pull request #38 from EthicalML/copilot/add-manifest-repo

Add Manifest (mnfst/manifest) to Agent Monitoring section

Author: zhimin-z

README.md

@@ -108,6 +108,7 @@ Please review our [CONTRIBUTING.md](https://github.com/EthicalML/awesome-product
 ## Agent Monitoring
 
 * [Judgeval](https://github.com/JudgmentLabs/judgeval) ![](https://img.shields.io/github/stars/JudgmentLabs/judgeval.svg?cacheSeconds=86400) - Judgeval is an open-source framework for agent behavior monitoring. Judgeval offers a toolkit to track and judge agent behavior in online and offline setups, enabling you to convert interaction data from production/test environments into improved agents.
+* [Manifest](https://github.com/mnfst/manifest) ![](https://img.shields.io/github/stars/mnfst/manifest.svg?cacheSeconds=86400) - Manifest is open-source observability for AI agents. Track costs, tokens, messages, and performance — entirely on your machine.
 
 ## Context Management