Act vs Atuin

act is an open-source command-line tool that runs GitHub Actions workflows locally using Docker containers. It reads workflow files from .github/workflows/ and executes them with environment variables and filesystem configurations matching GitHub's hosted runners. The tool enables fast local feedback on workflow changes without requiring commits and pushes to a remote repository.

Atuin is an open-source tool that replaces the default shell history with an encrypted SQLite database, providing full-text search and optional sync across machines. It stores additional context like directory, exit code, and duration for each command.