Overview
Re_gent is a version control system for AI agent actions. It tracks every change made by AI coding assistants, links each change to the prompt that caused it, and allows developers to undo, blame, and replay agent sessions. Think of it as git for AI-driven development. It's currently in public alpha, free forever under Apache-2.0, and works with tools like Claude Code, Codex, and OpenCode.
PawPause is a tiny macOS menu bar app that detects when a cat is on the keyboard and pauses input system-wide. It runs 100% on-device with zero network calls, no storage, and no analytics. The detection engine inspects key-press patterns (not characters) to distinguish paws from human typing. It's open source under MIT and completely free.
Feature Comparison
| Feature | Re_gent | PawPause |
|---|---|---|
| Primary Function | Version control for AI agent actions | Cat-on-keyboard detection and input pausing |
| Target Users | Developers using AI coding assistants | Cat owners on Mac |
| Platform | Cross-platform (CLI) | macOS (menu bar app) + JS library |
| Data Handling | Local content-addressed storage; full conversation history | 100% on-device; no storage or network |
| Open Source License | Apache-2.0 | MIT |
| Pricing | Free forever | Free |
| Installation | CLI via GitHub | .dmg download |
| Key Interface | rgt commands (log, blame, sessions) | Menu bar paw icon |
| Audit Trail | Full prompt-to-change tracking | None (real-time only) |
| Conflict Resolution | Branching for multiple agents | N/A |
Pricing
Re_gent: Free forever under Apache-2.0 license. No paid tiers, no hidden costs. The project is community-driven and welcomes contributors.
PawPause: Completely free, open source under MIT. No in-app purchases, no subscriptions, no ads. The developer provides it as a public good for cat owners.
Pros and Cons
Re_gent Pros
- Full audit trail linking AI prompts to file changes
- Supports multiple AI coding assistants (Claude Code, Codex, OpenCode)
- Enables rollback and replay of agent sessions
- Free and open source with strong community focus
- Branching for multiple concurrent agents
Re_gent Cons
- Currently in public alpha (may have bugs)
- Requires learning new CLI commands
- Limited to specific AI tools (more planned)
PawPause Pros
- Simple, focused solution for a common problem
- 100% on-device with strong privacy guarantees
- Easy to install and use
- Free and lightweight
- Automatic release and Esc override
PawPause Cons
- macOS only (no Windows/Linux native app)
- Limited to one specific use case
- May occasionally block human typing (rare)
- Requires special permissions (Input Monitoring, Accessibility)
Verdict
Re_gent and PawPause are both excellent free, open-source tools, but they solve entirely different problems. Choose Re_gent if you're a developer who needs version control and audit trails for AI coding agents — it's essential for managing multiple AI assistants and understanding what they changed and why. Choose PawPause if you're a Mac-using cat owner who wants to prevent your feline friend from causing chaos on your keyboard — it's a simple, privacy-respecting solution that just works. Both products deliver exactly what they promise, and you might even find yourself using both if you're a developer with a cat.