Envelope – A modern environment variable cli tool

In plain words

Envelope is a command-line tool for managing environment variables across different project configurations like development and production. Built in Rust, it helps developers organize variables by environment and inject them into programs via a single command, reducing the risk of mixing up configuration files and accidentally applying changes to the wrong environment. The tool was created to prevent production incidents caused by misconfigured .env files.

written from the facts on this page · September 2026

From the sources

An environment variables cli tool backed by SQLite - mattrighetti/envelope

In the maker’s words, at launch

Hey HN! I've built this cli tool to manage env variables of a project, but mostly for fun and to try out Rust and the clap crate. I had this idea when I made a big mistake and broke some production stuff because I had a very messy .env file laying around in my project. I was implementing new features for one of my…

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