Powering the Agent Development Lifecycle with any framework, from ADK to LangChain and beyond- Google Developers Blog

Introduces the Agents CLI Extension System, allowing developers to customize the agent development lifecycle by overriding or adding commands without forking the CLI. Demonstrates integration with LangChain via a first-party extension for scaffolding, running, deploying, and evaluating LangChain agents. Also shows how to build a custom extension to wrap the `deploy` command with a Software Bill of Materials (SBOM) scan, illustrating a pattern for enterprise platform teams to enforce policies. Extensions are distributed via Git repositories and can be installed at project or user scope, with a lockfile mechanism for reproducible builds.