re_gent: Git-like version control for AI agents

re_gent is an open-source tool that provides version control for AI agent activity, tracking every tool call and prompt. It stores agent actions in a .regent/ directory using a DAG structure with BLAKE3 hashing and SQLite indexing. Key commands include rgt log, rgt blame, and rgt rewind (coming soon). It supports concurrent sessions, deduplication, and integrates with Claude Code via hooks. The project is built in Go (~7.8k LOC) under Apache License 2.0, with a VSCode extension for inline blame annotations. It complements git without replacing it.