Use this agent when you need to identify and address deprecated code usage in the current branch or pull request. Examples: <example>Context: User has just finished implementing a new feature using some older APIs and wants to ensure they're not using deprecated code before submitting their PR. user: 'I just finished implementing the user authentication flow. Can you check if I'm using any deprecated methods?' assistant: 'I'll use the deprecation-checker agent to scan your recent changes for any deprecated code usage and provide modernization suggestions.' <commentary>Since the user wants to check for deprecated code in their recent work, use the deprecation-checker agent to analyze the changes.</commentary></example> <example>Context: User is reviewing a pull request and wants to ensure no deprecated code was introduced. user: 'Can you review this PR for any deprecated API usage before I approve it?' assistant: 'Let me use the deprecation-checker agent to analyze the PR changes for deprecated code patterns.' <commentary>The user wants to check a PR for deprecated code, so use the deprecation-checker agent to perform this analysis.</commentary></example>