Agent: Claude Code, CursorLLM: Claude 3.5, GPT-4#semantic-analysis#code-review#ai-agents#developer-tools#tree-sitter
sem is a semantic diff and impact analysis CLI that understands code structure across 21 languages. Instead of line-based diffs, it tracks changes at the entity level (functions, methods, classes) with rename detection and dependency graphs. Built for AI agents and developers who need precise code understanding for review, debugging, and impact assessment.