Ataraxy-Labs/sem

Tracks semantic changes (function/class/method additions, modifications, deletions) rather than line-level diffs, with three-phase entity matching that detects renames and structural moves via AST hashing. Parses 21+ languages and structured formats (JSON, YAML, TOML) using tree-sitter in native Rust, supporting parallel processing and pluggable language support. Integrates with Git as a custom diff tool, outputs JSON for CI pipelines and AI agents, and provides impact analysis and dependency graph generation via a Rust library that powers downstream tools like semantic merge drivers.

843 stars. Actively maintained with 109 commits in the last 30 days.