npins

Supports tracking git repositories from GitHub, GitLab, and Forgejo with efficient fetchTarball for releases, and handles branches, tags, and specific commits, as shown in the add command examples.

Tracks Nix channels directly, providing access to the programs.sqlite database unlike git-based methods, which is highlighted as a key feature in the README.

Allows pinning Python packages from PyPi with version constraints and upper bounds, ensuring reproducible builds for Python dependencies, demonstrated in the add pypi commands.

Includes commands to import pins from Niv or flake.lock files, making transition from other tools straightforward, as detailed in the import-niv and import-flake sections.