Semantic codebase search tool for AI coding agents that finds the right context by meaning before the agent opens files or makes edits.
Perseus is a codebase search tool that gives AI coding agents such as Claude Code, Cursor, and Codex a repo-trained search model to understand a codebase before editing it. It provides semantic search (finding code by meaning), research queries (combining linked questions to surface files, tests, and contracts together), impact analysis (checking the dependency graph before editing a shared symbol), and eval generation (turning a diff into the minimal verification test plan). Each capability reduces trial-and-error in AI-assisted coding by reading only the relevant context before changes are made. Perseus is a product of Perseus.