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.