mise is a unified CLI tool for managing development environments. It combines tool version management (like asdf), environment variable injection, task running, dotfiles management, system package bootstrapping, and OCI image building into a single command-line interface. The system is implemented in Rust as a workspace of multiple crates, with a plugin system based on Lua (vfox) and support for many backends (asdf, aqua, npm, cargo, pipx, Homebrew, etc.). It also includes supply-chain security features via Sigstore attestation verification and packslip signing. The architecture is a modular Rust CLI with async I/O (tokio), a plugin system for tool backends, a configuration layer that merges TOML files with environment variables, and a task runner with dependency graphs and file watching. Key entry points include the main binary (src/main.rs), CLI subcommands in src/cli/, backend implementations in src/backend/, and the Lua plugin runtime in crates/vfox/. External dependencies include GitHub API, npm registry, aqua registry, Sigstore TUF repositories, and various system package managers (apt, brew, dnf, etc.). The codebase demonstrates high craftsmanship with clean abstractions (Backend trait, TaskFileProvider, SingleReport), reusable utility crates (mise-util, mise-dotenv, mise-cache-core), and extensive testing (unit, integration, e2e). Notable subsystems include an interactive TOML editor with undo support, a comment-preserving document parser, a remote cache protocol with OIDC authentication, and a documentation showreel generator with custom animation and audio. The project is actively maintained with frequent commits, comprehensive CI/CD, and a large community (34k+ stars).

fnox is a production-grade secrets management CLI written in Rust. It resolves secrets from over 20 providers (encryption keys, cloud secret stores, password managers, hardware tokens) and injects them into subprocess environments, shell sessions, or a local TUI. The system uses a hierarchical, profile-based configuration model where secrets can be sourced from encrypted local files (age), cloud services (AWS, Azure, GCP, Vault), or third-party password managers (1Password, Bitwarden, Doppler, Proton Pass) with support for short-lived credential leases. It also provides a daemon for caching resolved secrets, an MCP server for AI agent integration, an HTTPS proxy that auto-injects credentials, and a secret scanning command for CI/CD pipelines.