Show HN: Riftri – copy-on-write Git worktrees for running agents in parallel

Category: devtools

Tags: git, worktree, copy-on-write, ai-agents, rust

Score: 7.3/10 (Innovation: 6, Technical: 8, Documentation: 8, Utility: 7)

Riftri provides copy-on-write Git worktrees that share unchanged files at the filesystem level, drastically reducing disk usage when running multiple parallel agents or feature branches. It leverages native COW mechanisms (APFS, Btrfs, ReFS, OverlayFS) while preserving standard Git worktree semantics, with journaled operations and fail-closed safety. A well-executed tool addressing a real pain point in parallel AI-assisted development.

Target audience: Backend devs, DevOps engineers, AI coding agent users

Repository: https://twitter.com/KinfishT/status/2102093551601684897 · Rust · MIT · 24 stars

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