Omen

Omen is a command-line tool built in Rust that analyzes source code across 13 languages using tree-sitter parsing. It runs 20 analyzers to identify cyclomatic complexity, cognitive complexity, code clones, dependency cycles, technical debt, and defect-prone patterns. The tool is designed to help both human reviewers and AI coding assistants understand codebase health by surfacing structural and quality issues that are easy to miss in code review.

Omen provides quantitative metrics on code quality dimensions including complexity, coupling, cohesion, and historical patterns. It outputs call-graph reports with symbol resolution data and generates structured reports that highlight hotspots and hidden dependencies. The maker indicates it was built with Claude Code and integrates with AI agents via MCP.